Activated carbon is a kind of carbon with multiple pores. It has a very rich pore structure and good adsorption characteristics. Its adsorption is formed by physical and chemical absorption, and its appearance is colored. In addition to the main carbon, its composition also contains a small amount of hydrogen, nitrogen, and oxygen. Its structure looks like a hexagon. Due to the irregular hexagonal structure, it is determined that it is mostly body and high surface area. Characteristic, every gram of activated carbon has a specific surface equivalent to 1000 square meters.

Activated carbon is mainly made of materials with higher carbon content, such as wood, coal, fruit shell bones, and petroleum residues. With coconut shell as the most commonly used raw material, under the same conditions, the active quality and special characteristics of coconut shell activity are the best, because it has the largest specific surface area.

Activated carbon can be divided into physical steam method and chemical method according to the production method. Here, we will focus on the production of physical steam method. Generally, production is divided into two processes.

briquette

In the first step, carbonization, the raw materials are dried at a temperature of 170 to 600, and 80% of the organic tissue is carbonized in the same amount.

The second step is activation. The carbonized material that has been carbonized in the first step is fed into the reaction furnace to react with the activator and steam to complete the activation process and make a finished product. In the process of endothermic reaction, CO and H2 combined gas are mainly generated, which is used to heat the carbonized material to an appropriate temperature (800 to 1000 degrees), remove all its decomposable substances, and produce a rich pore structure and a huge specific surface area. The activated carbon has a strong adsorption capacity.

Activated carbon produced from different raw materials has different pore diameters. Among them, the pore diameter of coconut shell is the smallest, the pore diameter of wood activated carbon is generally larger, and the pore diameter of coal-based activated carbon is between the two.

The pore size of activated carbon is generally divided into three categories:

Large hole: 1000-1000000A

Transition hole: 20-1000A

Micropore: 20A

According to the above characteristics, it can be seen that for different adsorption objects, the corresponding activated carbon needs to be selected to achieve the best cost performance. Therefore, in liquid phase adsorption, activated carbon with more transition pores and larger average pores should be used.

Charcoal and briquettes, although both are activated carbon, both have great effects and are suitable for different professional fields. But their functions are different. Let me introduce them below.

Charcoal is an activated carbon product made from residues such as sawdust and nut shells. Briquettes are activated carbon products made from coal. Due to the different raw materials, there are differences in the production process, technical characteristics, and product characteristics of wooden activated carbon and briquettes, which affect the application fields relatively differently.

briquettes

1. In the field of liquid phase adsorption

Coal contains heavy metals and ash, and the purity of the product is low. Since the pores are mainly produced by physical methods, the pores are mainly micropores, which are suitable for small molecule adsorption and have a relatively narrow application range. Generally used in industrial fields, such as petrochemical, metallurgy, printing and dyeing, and liquid phase adsorption in sewage treatment; charcoal has low ash content, few impurities, and is easy to purify. Its pore distribution structure is easy to adjust, and the micropores and mesopores are developed and widely used, especially in fields that require higher adsorption performance and higher product safety requirements, such as food and beverage, medicine, and coal cannot be replaced.

2. In the field of gas phase adsorption

Coal has high strength and is easy to recycle, and is often used for gas phase adsorption; charcoal has low strength and is not traditionally used for gas phase adsorption. However, with the advancement of technology and production, with the advancement of technology, the application of charcoal has also been extended to some emerging gas phase adsorption fields, such as oil and gas recovery, household air purification, etc., and with the development of people. Pay more attention to health and environmental protection, and their application space in the field of gas adsorption will be further developed.

3. From the perspective of long-term trends

During the production process, raw coal resources are not renewable, coal-based activated carbon resources are limited, and carbon dioxide emissions increase. Therefore, product prices are driven by raw materials and environmental protection costs. The main reason for charcoal is that the “three residues” of forest products are renewable, and due to technological advances, the price is expected to decrease relatively. Therefore, the long-term competitive advantage of wood activated carbon is higher than that of briquettes.

Wood activated carbon and briquettes are different in many aspects such as production process, technical characteristics, and product characteristics. From an industrial perspective, the two belong to different industrial fields. The former belongs to the forestry chemical industry and the latter belongs to the coal chemical industry. At the same time, due to the different downstream application fields of briquettes and charcoal, the downstream customers of charcoal and briquettes are also different. The downstream users of wood activated carbon are mainly concentrated in food, beverage, medicine and other fields, and the manufacturers’ customers are mainly concentrated in the chemical, printing and dyeing, sewage treatment and other industrial fields. Competition between wood activated carbon and briquettes manufacturers.

The briquetting machine is composed of a pressing shaft assembly, a frame, a pre-press, a hydraulic system, a coupling, a reducer, and a motor. According to the function of each part, it can be divided into three parts: feeding, transmission, and forming. Each of the different parts has a vital influence on the forming of the briquetting machine. Zhongyuan Mine is a high-pressure briquetting machine, The manufacturer of ultra-high pressure briquetting machine has many years of experience in the structural design of briquetting machine, and will explain in detail the composition of these three parts and the operating principle of the briquetting machine.

Composition of briquetting machine

1. The feeding part is mainly to realize quantitative feeding to ensure that the material evenly enters the roller room. The screw feeding device is driven by a speed-regulating motor, and is rotated by a belt pulley and a worm reducer to force the pressed material into the main feed inlet. Due to the constant moment of the speed-regulating motor, when the pressure amount of the screw feeder is equal to the amount of material required by the host, a constant feeding pressure can be maintained to stabilize the pellet quality. If the feeding amount is too large, the electric power of the feeding device will be overloaded; if the feeding amount is too small, the ball will not be formed. Therefore, skilled operation techniques are an important condition to ensure the normal work of the pressure ball.

High pressure briquetting machine

2. In the transmission part, the main transmission system is: motor-coupling-synchronous reducer-roller. The main engine is powered by a speed-regulating motor, which is transmitted to two pressure rollers via a synchronous reducer. A hydraulic device is installed behind the movable bearing seat. The hydraulic protection device uses a hydraulic pump to drive high-pressure oil into the hydraulic cylinder, causing the piston to produce axial displacement. The front joint of the piston rod rests on the bearing seat to meet the production pressure requirements.

3. The forming part mainly refers to the main machine part, and the core part is the pressing roller. When there is too much feed between the two pressure rollers or metal blocks, the piston rod of the hydraulic cylinder is overloaded, the hydraulic pump will stop, the accumulator will buffer the pressure change, the overflow valve will open to return oil, and the piston rod will shift Enlarge the gap between the pressure rollers so that the hard objects can pass through the pressure roller, and the system pressure will return to normal, which can protect the pressure roller from damage. This machine can adjust the pressure according to the requirements of the pressure ball density, and the production is flexible and flexible.

Working principle of briquetting machine

In order to make the material into a ball under high pressure, a pre-compression screw is used to force the material to be formed into the middle of the counter roller. Due to the constant speed and reverse rotation, the material is compressed and formed. The unit pressure is from small to large until the centerline of the counter roller is “0-0”. At this point, the molding unit pressure reaches the maximum value. As the counter roller continues to rotate, the molding pressure continues to decrease, and it enters the ball-off state until the ball is off.

Among them, the main engine is powered by an electromagnetic speed regulating motor, which is transmitted to the driving shaft through a rod-pin coupling through a belt pulley, a cylindrical gear reducer. The driving shaft and the driven shaft are ensured to run synchronously through open gears. A hydraulic device is installed behind the passive bearing seat. The screw feeding device is driven by an electromagnetic speed-regulating motor, and is rotated by a belt pulley and a worm reducer to force the pressed material into the main feed inlet.

Medium-Pressure-Briquette-Machine

Due to the constant torque characteristic of the electromagnetic speed-regulating motor, when the pressure of the screw feeder is equal to the amount of material required by the host, a constant supply pressure can be maintained to stabilize the pellet quality. If the feeding amount is too large, the feeding device will be overloaded; if the feeding amount is too small, the ball will not be formed. Therefore, skilled operation techniques are an important condition to ensure the normal operation of the energy-saving briquetting machine.

The hydraulic protection device uses a hydraulic pump to drive high-pressure oil into the hydraulic cylinder, causing the piston to produce axial displacement. The front joint of the piston rod rests on the bearing seat to meet the production pressure requirements. When there is too much feed between the two pressure rollers or metal blocks, the piston rod of the hydraulic cylinder is overloaded, the hydraulic pump will stop, the accumulator will buffer the pressure change, the overflow valve will open to return oil, and the piston rod will shift Enlarge the gap between the pressure rollers so that the hard objects can pass through the pressure roller, and the system pressure will return to normal, which can protect the pressure roller from damage. Kaizheng environmental protection machine can adjust the pressure according to the requirements of the pressure ball density, and the production is flexible and flexible.

Analysis of working principle of briquetting machine

It can be seen from the working principle that the quality of the pressed ball blank is directly related to the spiral shape, speed, pre-pressure, etc., when the host-to-roller speed is fixed, so the pre-compression screw speed must be adjustable, and at the same time, it is related to the nature of the powder. The particle size and pelletizing process (dry and wet method) have a greater impact. Generally speaking, wet molding is easy. For dry molding, due to the large compression ratio of raw materials, it takes many times to press molding. Therefore, when dry molding is used, new The pressing process of feeding and returning the material can continuously and stably produce and ensure the quality of pellets.

Testing-briquette-machine

How does the briquetting machine work

1. The material enters the forming machine hopper evenly from the storage bin through the quantitative equipment, and is adjusted by the adjusting gate on the hopper to make the material evenly enter the middle of the roller.

2. The unit molding pressure of the material that is compressed by the rollers with the constant speed and reverse rotation is changed from small to large, and the molding pressure reaches a large value at the center line of the pair of rollers. After the material passes the line, the molding pressure decreases rapidly so that the material enters The state of the ball.

The above is all about the working principle of the briquetting machine. Only by understanding its working principle in detail can the briquetting machine be operated more efficiently and safely.

Briquette is made of pulverized coal as the main raw material, and is molded by mechanical processing according to the proportion, mechanical strength, and shape required by the specific application. The coal products with a certain strength, size and shape, common coal products include Briquettes, briquettes, coal sticks, briquettes, etc.

As a kind of clean coal production technology, briquette production has the advantages of simple operation, mature technology, low cost, obvious energy saving and efficiency, and reduced exhaust gas emissions. The production process is divided into binder-free molding, binder molding, and thermal Three kinds of compression molding. There are many types of forming machines, such as stamping forming machines, roll forming machines, screw extruders and honeycomb coal machines.

There are many types of briquette. The briquette can be pulverized coal, coal noodles, coal slime, respectively pressed into spherical or other shapes. It is also possible to mix pulverized coal and slime into spherical and other shapes. Used for boiler combustion and gas production.

Application of briquette

The powdered coal or pulverized coal is press-formed by a mechanical method, and the coal product has a certain shape or particle size. Common ones are briquettes, briquettes and briquettes. Briquette can improve combustion efficiency, reduce environmental pollution, expand the application range of lean coal, gas coal, long flame coal and lignite and other high volatile and weak caking coal, and rationally utilize coal resources.

There are two types of briquette for industrial use and civil use. Industrial briquette includes chemical briquette, which is used for chemical fertilizer production, steam locomotive briquette, and metallurgical briquette (also called briquette). Civil briquette, also known as domestic coal, is used for cooking and heating, mainly briquettes.

Chromium ore powder

Industrial briquette

①The briquette used in chemical industry is generally 35-50mm briquettes, which can be formed with anthracite less than 3mm or powdered lignite with a tar yield greater than 10%. It is mainly used for producing gas from chemical fertilizers, producing semi-coke, liquid or gas fuel and producing chemical products such as methanol and acetic acid.

②The briquette used as fuel for steam locomotives has several shapes such as oval shape and drip shape. The coal for locomotives developed in China can save coal by more than 8%. The development of power briquette needs to solve the key technical issues such as using temperature control to master thermal deformation characteristics during the combustion process, using batching technology to improve coal quality, and increasing the ash melting point of briquette. For example, for coal with high sulfur content, catalytic reverse equilibrium should be used to increase the sulfur conversion rate to reduce pollution.

③Formed coke is formed by forming weakly cohesive pulverized coal and coking in a continuous coking oven, or using high-speed thermal analysis to extract colloids to achieve hot pressing into coke. The development of coke can expand coking raw materials and improve the efficiency of coke ovens. China uses low-pressure binder molding to produce industrial briquette. The binder is mostly lime, petroleum pitch, tar pitch or paper pulp waste liquid. The amount depends on the agglomeration of coal, generally 5-10%.

Civil briquette

In addition to ordinary briquettes and briquettes, in recent years, the development of combustible briquettes for heating and upper-ignition briquettes for household cooking has begun. The structure and raw material formula of this briquette are more complicated. Generally consists of three parts: ignition layer, ignition layer and coal body. The ingredients of each layer are different in formula.

①The ignition layer is mostly mixed with oxidizer or paraffin wax, carbon, semi-coke powder and other combustible substances mixed with binder.

②The ignition point of the transition layer is slightly higher than that of the ignition layer, which can ignite fire. Therefore, the raw material coal is required to have a large calorific value of 6000kcal/kg and a suitable particle size.

③The coal body can adopt anthracite, bituminous coal, lignite, peat or flotation tailings according to local conditions. When the briquette made of bituminous coal burns, the volatile matter and the free carbon produced by pyrolysis are not fully burned and fumes. Therefore, the volatile matter of the ingredients must be controlled within the range of 20-25%, and an appropriate amount of coke and coke must be added. lime. Make the inside of the coal body have a good microporous structure, creating conditions for the uniform precipitation of combustible gas; it is also necessary to improve the stove to ensure sufficient oxygen supply to achieve complete combustion and smoke suppression. The briquettes with anthracite as the main body should be appropriately added with high volatile bituminous coal to enhance the flame temperature, height and ignition speed. If the ingredients are appropriate, the gas after the ignition of the briquettes can generally meet the environmental protection requirements, but the cost is slightly higher.

Advantages of briquette

lime

(1) Improve combustion efficiency and reduce energy waste

As the main body of civil briquette, briquette is equipped with advanced stoves, and its thermal efficiency is twice as high as that of burnt coal. Among various clean coal technologies, industrial coal has the highest energy conversion rate, reaching 97.5%, which is far greater than other technologies. Boiler briquette products have a large particle size, which can ensure the required gaps during combustion, and the combustion efficiency is high. At the same time, the amount of exposed coal is small. Compared with burning raw coal, it saves 15% to 20% of coal.

(2) Reduce environmental pollution

Boiler burning coal can greatly reduce air pollution. Compared with burning raw coal, SO2 emissions are reduced by about 40% to 60%, NO2 emissions are reduced by about 40%, soot emissions are reduced by about 60%, and strong carcinogens (Bap) are reduced by more than 50%, which has obvious environmental protection effects. The addition of sulfur-fixing agents and binders during the processing of briquette can reduce SO2 emissions by 40% to 50%, and at the same time can reduce solid dust emissions. In addition, briquette can use industrial waste and agricultural waste as a binder, turning waste into treasure, reducing the emissions of the three wastes.

(3) Change the performance defects of a single coal type

In the process of briquette processing and manufacturing, through the use of additives, coals with different properties are combined and blended to obtain indicators such as cohesiveness index, ignition point, ash content, ash melting point, sulfur content, fixed carbon, volatile content, and calorific value The improvement has increased the reactivity, flammability and thermal stability of coal, increased the ash melting point, and produced high-quality products with various indicators meeting customer requirements. For example, through coal blending, non-coking coal can be made into molded coke as a substitute for metallurgical coke; bituminous coal can be made into anthracite briquette to replace gas-making anthracite lump coal, thereby expanding the utilization of coal.

(4) Reduce demand for lump coal

A considerable part of China’s industrial boilers and kilns are layer-fired and require lump coal; the production of synthetic gas and fuel gas in China’s chemical fertilizer industry requires lump coal. The development of industrial briquette can alleviate the shortage of lump coal in short supply, and at the same time open up a technical way for the rational and effective use of fine coal.

Problems existing in burning industrial briquette in existing industrial boilers:

1. It is difficult to ignite the flame.

2. Stop the furnace to extinguish the fire.

3. The furnace temperature is low, the briquette burning time is long, the burning is not clean, and the carbon content in the ash is high.

Metallurgical industry materials

Industrial briquette needs requirements:

1. It has sufficient cold mechanical strength;

2. Have sufficient thermal stability;

3. It has strong moisture resistance and waterproof performance;

4. It has strong frost resistance;

5. With natural fast curing performance;

6. Save energy;

7. Reduce environmental pollution;

8. Low cost and high quality.

When evaluating the quality of industrial briquette, in addition to industrial analysis and element analysis of briquette, the following characteristic indicators should be considered:

1. Mechanical strength: including cold (hot) mechanical strength, drop strength, drum strength, etc. At present, there is no unified national quality standard for industrial coal, only the national quality standard for gasification and boiler coal. In the early 1980s, the main assessment indicators for “industrial coal development” were: cold compressive strength 350~500N/ball, drop strength greater than 75%, and drum strength greater than 70%. In addition, the mechanical strength requirements recognized by most domestic coal briquette experts for gasification briquette are: cold compressive strength greater than 400/N ball, thermal compressive strength greater than 200N/ball, thermal stability greater than 75%, and drop strength greater than 80% , The quality requirements for fuel briquette such as boilers can also be relaxed.

2. Ash melting property: the ash melting property ST of coal briquette for gasification is greater than 1250℃.

3. Sulfur fixation performance: the sulfur fixation rate of industrial coal with added sulfur fixation agent should be greater than 45%.

4. Water resistance: evaluate the performance of briquette after being immersed in water.

In addition to industrial analysis and element analysis, civil briquette also includes:

1. Calorific value: It should be greater than 16.6~20.8MJ/kg, which varies in different regions.

2. Compressive strength of honeycomb coal end face: Ф102mm, greater than 600N/block; Ф127mm, greater than 700N/block.

3. Thermal stability: no furnace collapse, no plugging, no slagging, no bursting during combustion.

4. Heating speed: more than 1℃/min.

5. Firepower: greater than 15/min.

6. Thermal efficiency: greater than 40%.

7. Ash melting: greater than 1100℃.

In the production and processing of most powdery or granular materials, in order to transport and use them more efficiently, it is necessary to use briquetting equipment to press these materials into pellets, but some materials are special because of their special characteristics. The physical characteristics and production process of the product can not be pressed into a shape at one time, so it is necessary to choose the second briquetting process of the briquetting machine to compress the material.

First, equipment required for briquetting

High pressure briquetting machine

Under normal circumstances, when the material cannot be added with any binder and requires a large ball-forming pressure, either high-pressure and ultra-high pressure briquetting machines (such as the high-pressure briquetting machine produced by Zhongyuan Mining Machinery) are used for material compression, or Change the material briquetting process, that is, cooperate with other equipment for secondary briquetting, so in addition to the briquetting machine, the equipment required for the secondary briquetting is as follows:

1. Belt conveyor: the conveying equipment that transports the material powder to the bucket elevator. Through a reasonable site layout, it can simultaneously carry the material after the initial briquetting of the briquetting machine and send it to the bucket elevator at the same time machine.

2. Bucket elevator: convey the material conveyed by the belt conveyor to the conveyor of the grinding and crushing system.

3. Material screening machine: Different granular materials are distinguished through the screen and sent to the grinding and crushing equipment or the supply bin.

4. Distributing chute: the qualified and unqualified balls are distinguished by vibration through the second compression.

5. Grinding and crushing equipment: It can crush and grind large particles and materials that cannot be formed at one time.

6. Screw conveyor: feed the materials from the supply bin to the briquetting machine after proportioning and metering.

Two, briquetting process

Mineral powder ball machine

1. Firstly, the ground material in the supply bin is sent to the briquetting machine through the screw conveyor for the first briquetting, and the material after the first pressing is sent to the sieving machine through the elevator for vibrating screening;

2. The screened material is sent to the grinding and crushing equipment for processing and then discharged into the intermediate bin as the aggregate for the secondary briquetting;

3. The screened material enters the fine powder silo, and then the fine powder and the aggregate in the intermediate silo are sent to the briquetting machine through a screw conveyor to perform secondary briquetting according to a certain ratio;

4. After the secondary compaction, the pellets will enter the distribution chute through the elevator. Under normal circumstances, the pellets will be vibrated and screened by the distribution chute. The finished pellets will go directly to the next processing stage, and the non-finished pellets will be sent to crush again The machine is crushed and then ground, and then returned to the supply bin of the briquetting machine, as the ratio of aggregate and fine powder for secondary briquetting.

Three, precautions for briquetting

1. In order to ensure sufficient material supply to the briquetting machine, in the case of a large amount of material being fed by the feeder, an overflow material outlet should be set at the screw feeding device, and the overflow material should be returned to the briquetting machine supply bin through a lifter.

2. The distribution chute should also be equipped with an overflow. When the distribution chute is full, the ball will flow out from the overflow to the vibrating screening machine, and the sieved material will enter the green ball circulation bin for storage. When the system fails, the balls in the green ball circulation bin are lifted by the elevator to the distribution chute and circulate again.

3. Before proceeding with formal processing, pay attention to adjust the ball-forming pressure of each briquetting machine and the symmetry of the press roller to avoid secondary briquetting and mold sticking caused by equipment problems.

4. Pay attention to the feeding route of each conveying equipment and screening equipment, and avoid the mixed storage of primary processing and reprocessing materials in the site design and process, so as to ensure that the material ratio of the secondary briquetting is more accurate.

The above content is a detailed introduction to the briquetting process. Basically, for materials that cannot be formed at one time, the ratio of fine powder and aggregate is used for secondary briquetting, which can greatly increase the spheroidization rate and the volume of the pellets. Density to ensure the quality of the ball.

As a tool for energy saving, environmental protection and turning waste into treasure, the briquetting machine must follow standard operating procedures during production and use, reasonably arrange production time, and strictly prohibit continuous and uninterrupted operation, which exceeds the tolerance of the equipment. In addition, when starting the equipment, you must pay attention not to start with a load, otherwise there will be a stuffy phenomenon, which will affect the motor or even burn the motor. Next, the briquetting machine manufacturer will explain how to use the briquetting machine.

1. Host (mechanical molding)

Check whether all parts of the electrical appliance are normal before starting up. Check the alignment of the die holes of the two rollers. If they are not aligned, open the gear guard, loosen the six screws on the adjustment plate on the driven gear, turn the passive roller forwards and backwards to align the die holes of the two rollers, and tighten the screws. The working roll spacing should be kept between 0.5-0.8mm. If it is too large or too small, you can loosen the passive roll, the bearing and wire drawing, adjust them, and tighten the screws and wire drawing after adjustment. After starting to produce the finished product, check whether the upper working surface of the double roller is compatible. If there is an error, remove the protective cover on the large gear and loosen the outer ring screw of the driven roller gear for adjustment.

2. Host (Hydraulic Forming)

First check whether the electrical appliances work normally, and whether the steering of the mold roller and hydraulic mercury is positive. Then check whether the die holes of the two rollers are aligned, the distance between the two rollers should be between 0.4-0.6mm, and it should be adjusted if it is too large or too small. If the two-roller die holes are not aligned, the gear guard should be opened, loosen the six screws of the adjustment plate on the driven gear, turn it forward or backward, and tighten the screws after the adjustment is correct. If the distance between the two rollers is large or small, the passive (moving) shaft should be adjusted on the four adjusting wires on both sides of the driving wheel. After everything is normal, the machine oil should be added to the reducer. Add the hydraulic oil to the hydraulic mercury tank. Start the pressure test, which means the bottom of the pressure regulation is 9MPa and the high regulation is 12MPa. Start trial production only after everything is normal.

3. Blender

If the clutch slips during production, the fixed wire on the three-jaw frame can be loosened for adjustment, and the angle of the mixing blades on the two shafts can be adjusted according to the output to ensure the main machine material. If you need to add additional materials (adhesive, waterproof), you can add it in the mixer.

4. Conveyor

During normal work, ensure that the belt does not run off. If the belt is not correct, adjust the front and rear roller bearings to close the top wire.

5. Feeder

First, start the machine to adjust the belt slack, so that the belt must not run off, and then adjust the size of the gate according to the production capacity of the molding machine, so that the amount of material supplied is not too much.

The above is about the use of the various components of the briquetting machine, but as an operator, in addition to being able to operate each host proficiently, what you should also do is to first understand the working conditions of the briquetting machine, such as the briquetting machine is abnormal in the production process Phenomenon occurs, such as checking whether there is accumulation of materials in the machine body, whether there are hard objects such as rocks or iron blocks, check and solve the problem first.

1. Check before starting

Before starting the briquetting machine, first check the tightness of the motor belt and whether the fit between the equipment parts is tight. If it is found to be improper, it should be adjusted in time, and the production can be carried out after the abnormality is eliminated. In addition, it is strictly forbidden for non-professionals to disassemble and modify the equipment without authorization. In order to avoid damage to the equipment, thereby causing unnecessary losses; during the operation of the briquetting machine, it is strictly forbidden to touch all rotating parts; the equipment is strictly forbidden to start with load, and the material should be intermittently loaded before shutting down. After the raw materials in the silo are pressed Shut down again and rinse with tap water after shutdown. When the device is turned on, it is necessary to repeatedly check whether the components are incomplete, whether the connection is intact, and if an abnormality is found, it must be adjusted and then turned on.

2. Adjust the humidity or adhesive of the machine according to the material

After checking the briquetting machine, you need to choose whether to adjust the humidity or add adhesive according to the material of the day. Some materials that do not have the ability to form pellets need the assistance of adhesives to be able to form smoothly, while some materials need to adjust the humidity, which affects the molding effect and pelletizing rate during the use of the briquetting machine.

3. Adjust the pressure according to the material

In addition to adjusting the humidity according to the material and whether to use an adhesive, sometimes it is necessary to adjust the pressure of the briquetting machine according to the material. If the required pressure or particle size of the pressed material is not appropriate, it will not only make the briquetting machine difficult to operate, but also accelerate the wear of the roller.

4. Prepare enough materials

Before the briquetting machine works, prepare enough materials. During the working process of the briquetting machine, the supply of materials is uniform, frequent and sometimes less, and the material interruption and blockage will directly affect the working efficiency of the briquetting machine.

5. Selection of skilled operators

Skilled operators can improve the working efficiency of the briquetting machine, and can solve some small problems and minor defects in the briquetting machine in time. For efficient work of the briquetting machine, be sure to use skilled operators.

The briquetting machine is strictly prohibited from overloading. When the load on the parts reaches the limit, its wear will be greatly increased. In contrast, the service life will be severely shortened. On the contrary, the stable operation of the equipment can not only reduce the wear and failure rate, but also greatly increase the service life.

Therefore, in the production process of the briquetting machine, the operator must strictly follow the regulations to operate, so that the equipment operates in a standardized manner. Reasonable operation and use will greatly reduce the wear of the equipment, increase the service life of the briquetting machine, and bring greater benefits to our production.

Precautions for the use of briquetting machine

In the process of use, do not allow hard lumps to enter the briquetting machine, especially metal materials, otherwise it will directly cause damage to the machine. The size of the material to be processed must be guaranteed. The size below 3 mm is more suitable, otherwise the service life of the machine will be greatly reduced. This material entering the machine must be strictly controlled, and it is directly linked to the length of use of the host.

The transportation volume of materials should also be paid attention to. In the case of ensuring the quality of the materials, the large and small quantities should also be controlled. If the material is supplied too much, it is easy to cause the jam; if the material is too small, the pressure of the briquetting machine is not enough , Cannot work effectively. It is also very important to control the amount of feed in an appropriate amount. The briquetting machine can bring many benefits to everyone.

The second is regular maintenance, and the ancillary equipment should be maintained regularly, such as the refueling of the reducer and bearing seat, etc., which should be paid attention to. Correct use and maintenance methods can effectively reduce the wear of the briquetting machine and increase its life. It is very beneficial to users. When you use it, take care of the briquetting machine, so that the briquetting machine can create value for yourself longer.

In recent years, powder metallurgy has gradually become a processing method for manufacturing new materials. Powder metallurgy is a process in which various metal powders are used as raw materials to manufacture finished products and metal materials through pressing, sintering and necessary subsequent treatment. With the use of cheap iron powder, powder metallurgy technology has begun to be applied on a large scale in industries such as automobiles and textiles. Speaking of powder metallurgy, it is inseparable from the powder ball press. This is a kind of equipment that presses the powdery materials that are difficult to press into balls. So what are the advantages of the powder ball press for the metallurgical industry?

The application advantages of mineral powder briquetting machine in the metallurgical industry are mainly reflected in the following aspects:

High pressure briquetting machine

1. Environmental aspects

Powder scrap should be a relatively difficult project for the metallurgical industry. Stacking and occupying space will also cause certain pollution to the environment, and it will be more troublesome to transport. The powder ball press also does a better job of collecting dust. It can be said that it can play a very good role in improving the environment. If the metal powder is directly transported, it will not only cause dust leakage and pollution problems, but also cause material loss.

Mineral powder ball machine

2. Resource reuse

For the metallurgical industry, the value of a lot of dust and scrap is relatively high. For example, many metallurgical powders can be produced through general-purpose and platform-based technologies. Its scalability is very strong, and the ball can be re-invested in production research through the compression of the mineral powder ball press, which greatly increases the profit of the enterprise.

Because metal powder cannot be directly used for smelting, it needs to be pressed into pellets before it can be put into furnace metallurgy. Therefore, the application of ore powder briquetting machine in the metallurgical industry is more and more extensive. Here, Zhongyuan mining equipment manufacturers remind everyone to use it. When the mineral powder ball press machine is used, the material should be pretreated to prevent the material from jamming and blockage at the feed inlet. At the same time, it can also improve the ball formation rate and the strength of the mineral powder ball press machine.

The metal briquetting machine directly cold presses various metal scraps through high pressure, which is convenient for storage, transportation and recycling. It is widely used in steel mills, recycling and processing industries, non-ferrous and ferrous metal smelting industries and renewable industries.

In order to improve the quality of use of the metal briquetting machine and prolong its service life, the daily maintenance and maintenance of the metal briquetting machine must be done. Here is a brief introduction to the specific operation process of maintenance and maintenance.

1. When disassembling the filler cap, filter cap, inspection hole, hydraulic tubing and other parts of the hydraulic oil tank of the metal briquetting machine, avoid dust when the system oil passage is exposed. The disassembled part must be thoroughly cleaned before opening. For example, when removing the hydraulic oil tank filler cap, first remove the dirt around the fuel tank cap, unscrew the fuel tank cap, and remove the debris remaining in the joint (not flush with water to prevent water from infiltrating the fuel tank), and then open the fuel tank cap after cleaning.

Briquetting Press

If you need to use a wiping material and a hammer, you should choose a wiping material that does not remove fiber impurities and a special hammer with rubber attached to the striking surface. Hydraulic components and hydraulic hoses should be carefully cleaned and assembled after drying with high-pressure air. Use a well-packed filter element (the inner packaging is damaged, although the filter element is intact, it may be unclean). Clean the filter at the same time when changing the oil. Before installing the filter element, use the wipe material to carefully clean the bottom dirt in the filter housing.

2. Pay attention to the sound of the hydraulic pump and the overflow valve during the operation of the metal briquetting machine. If the cavitation noise of the hydraulic pump can not be eliminated after exhausting, it should be used after finding the cause and troubleshooting. If an actuator moves slowly when there is no load, accompanied by the sound of overflow valve overflow, it should be shut down immediately for maintenance.

Ball press

3. Regular maintenance of the metal briquetting machine is required. Check the attachments on the filter screen. For example, excessive metal powder often indicates the wear of the oil pump or the pulling of the oil cylinder. For this, it is necessary to diagnose and take corresponding measures before starting the machine. If the filter screen is damaged or dirt accumulated, it should be replaced in time, and the oil should be changed at the same time if necessary.

In industrial production, metal briquetting presses are widely used because of their easy installation, stable operation, high degree of automation, low failure rate, and easy maintenance. Therefore, in daily operation, it is very important to do a good job in the maintenance and maintenance of the metal briquetting machine.

In processing and transportation, belt conveyors are usually used for short-distance transportation of goods or materials. Belt conveyor is a kind of machinery that transports materials in a continuous manner by friction drive. It has the advantages of strong conveying capacity, simple and easy maintenance, high speed and stability, and low noise. So, what is the installation process of the belt conveyor? Here is a brief explanation for everyone:

belt conveyor

1. Install the rack

The installation of the belt conveyor frame starts from the head frame, then installs the middle frame of each section in sequence, and finally installs the tail frame. Before installing the rack, the center line must be drawn over the entire length of the conveyor. Since keeping the center line of the conveyor in a straight line is an important condition for the normal operation of the conveyor belt, it is necessary to install each section of the rack. Align the center line, and at the same time set up a rack to level it. The allowable error of the rack to the center line should not exceed 0.1mm per meter of captain’s front and rear. However, the error of the center of the frame over the overall length of the conveyor shall not exceed 35mm. After all the single sections are installed and identified, the single sections can be connected.

2. Install the drive device

When installing the driving device, care must be taken to make the drive shaft of the belt conveyor perpendicular to the center line of the belt conveyor, so that the center of the width of the drive roller coincides with the center line of the conveyor, and the axis of the reducer is parallel to the drive axis. At the same time, all shafts and rollers should be leveled. The horizontal error of the shaft is allowed within the range of 0.5-1.5mm according to the width of the conveyor. While installing the drive device, you can install the tail wheel and other tensioning devices. The roller axis of the tensioning device should be perpendicular to the center line of the belt conveyor.

3. Install the roller

After the frame, transmission device and tensioning device are installed, the roller racks of the upper and lower rollers can be installed, so that the conveyor belt has a curved arc that changes slowly. The distance between the roller racks in the turning section is two times the distance between the normal roller racks. One-third to one-third. After the roller is installed, make its rotation flexible and brisk.

4. The final identification of the belt conveyor

In order to ensure that the conveyor belt always runs on the center line of the idler and drum, the following requirements must be met when installing the idler, frame and drum:

①All rollers must be lined up, parallel to each other, and kept horizontal.

②All the rollers are arranged in a row, parallel to each other.

③The supporting structure must be straight and horizontal. For this reason, after the installation of the drive roller and the supporting roller frame, the centerline and level of the conveyor should be finally aligned.

5. Fix the rack on the foundation or floor

After the belt conveyor is fixed, feeding and unloading devices can be installed.

6. Hang the conveyor belt

When hanging the conveyor belt, first spread the conveyor belt strips on the idler section of the idler section, enclose the driving roller, and then apply it on the idler section of the heavy-duty section. A 0.5-1.5 ton hand winch can be used for hanging the belt. When tightening the belt to connect, the roller of the tensioning device should be moved to the limit position, and the trolley and the spiral tensioning device should be pulled toward the transmission device; and the vertical picking device should move the roller to the top . Before tightening the conveyor belt, the reducer and motor should be installed, and the braking device should be installed on the inclined conveyor.

7. Idling test machine

In the idling test machine, pay attention to whether there is deviation phenomenon in the operation of the conveyor belt, the operating temperature of the driving part, the activity of the roller during operation, the degree of contact between the cleaning device and the guide plate and the surface of the conveyor belt, etc. Carry out necessary adjustments, and test the machine with load after all parts are normal. If a screw-type tensioning device is used, the tightness must be adjusted again when the test machine is operated under load.

The above is the specific description of the belt conveyor installation process, I hope it will be helpful to everyone. The belt conveyor is simple to operate and convenient to use. It is widely used in the assembly, testing, packaging and transportation of electronics, electrical appliances, machinery, printing, food, and objects. Luoyang Zhongyuan Mining Machine Manufacture Co., Ltd. specializes in the production and development of belt conveyors, which can be customized according to customer needs. Interested parties are welcome to come to consult.

Impact crusher, referred to as impact crusher, is commonly known as sand making machine. It is a kind of high-energy and low-consumption impact crusher with international advanced level. Its performance plays an irreplaceable role in various ore fine crushing equipment. It is used in construction, mining, metallurgical industries, highways, railways, bridges, hydropower, The core equipment in the field of mineral grinding and the machine-made sand industry. So, do you know what are the characteristics of impact crushers? Here is a brief introduction for everyone.

Performance characteristics

impact-crusher

1. The impact crusher is a new type of medium and fine stone crushing equipment developed in the 1990s. It is also a model widely used in the world to replace cone crushers and roller crushers.

2. Novel and unique structure, balanced operation. Low energy consumption, high output and large crushing ratio.

3. The equipment is small in size, easy to operate, easy to install and maintain. It has a plastic function, the product is cubic, and the bulk density is large.

4. During the production process, the stone can form a protective bottom layer, the machine body is wear-free and durable. A small amount of wear parts are made of super hard and wear-resistant materials, which are small in size, light in weight and easy to replace parts.

2. Work characteristics

To put it simply, the impact crusher works with the principle of rock-on-rock. Let the stones collide with the stones accelerated and thrown out by the impeller in the natural falling process, so as to achieve the purpose of breaking. When the accelerated stones collide with the naturally falling stones, a vortex is formed, and the secondary crushing is carried out during the return process, so there is very little wear to the machine’s counterattack plate during operation. During the whole crushing process, the materials will impact and crush by themselves without direct contact with metal components, which prolongs the wear time of the machine and reduces pollution.

3. technical characteristics

1. High crushing efficiency, with fine crushing and coarse grinding functions; simple structure, convenient installation and maintenance, and low operating cost;

2. The ability to pass non-crushed materials is strong, and is less affected by the moisture content of the materials, which can reach 8%;

3. The product has excellent grain shape, cubic shape, and extremely low content of needle flakes. It is suitable for aggregate shaping, artificial sand making and high-grade highway aggregate production; it has high bulk density and minimal iron pollution.

4.structural characteristics

crusher

1. Feed hopper: The structure of the feed hopper is an inverted prism (or cylinder), and the feed port is equipped with a wear-resistant ring, and the incoming material from the feeding equipment enters the crusher through the feeding hopper.

2. Distributor: The distributor is installed in the upper part of the vortex crushing cavity. The function of the distributor is to divert the incoming material from the hopper, so that a part of the material directly enters the impeller through the central feed pipe and is gradually accelerated to a higher level. The speed is ejected, so that other parts of the material are bypassed from the outside of the central feed pipe into the outer side of the impeller in the vortex crushing chamber, and are impacted and crushed by the high-speed material ejected from the impeller, without increasing power consumption and increasing production capacity. Improve crushing efficiency.

3. Eddy crushing cavity: The structure of the vortex crushing cavity is an annular space composed of upper and lower cylinders. The impeller rotates at a high speed in the vortex crushing cavity. The vortex crushing cavity can also retain materials to form materials. For the lining, the material crushing process occurs in the vortex crushing cavity. The material lining separates the crushing effect from the vortex crushing cavity wall, so that the crushing effect is limited to the material, which plays the role of wear-resistant self-lining. The observation hole is to observe the wear condition of the wear block at the launch port of the impeller runner and the wear condition of the liner on the top of the vortex crushing chamber. The observation hole must be sealed tightly when the vertical impact crusher is working. The distributor is fixed on the upper cylindrical section of the vortex crushing cavity. The impeller rotates at a high speed to produce flow, which forms an internal self-circulation system through the distributor and the impeller in the vortex crushing cavity.

4. Impeller: The impeller structure is a hollow cylinder made of special materials. It is installed on the upper end of the main shaft assembly. It uses a conical sleeve and a key connection to transfer the button pitch and rotates at high speed. The impeller is the key element of the vertical impact crusher. The material enters the center of the impeller from the center inlet pipe of the splitter on the impeller. The cloth cone in the center of the impeller evenly distributes the material to the various emission channels of the impeller. At the exit of the emission channel, a wear-resistant block made of special materials is installed, which can be replaced. The impeller accelerates the material to a speed of 60-75m/s and ejects it, and impacts the material lining in the vortex crushing chamber for strong self-crushing. The upper and lower runner plates are installed between the cone cap and the wear block to protect The impeller is not worn.

5. Main shaft assembly: The main shaft assembly is installed on the base to transmit the power from the motor through the V-belt and support the impeller to rotate. The main shaft assembly is composed of a bearing seat, main shaft, bearing, etc.

6. Base: The vortex crushing chamber, main shaft assembly, motor, and transmission are all installed on the bottom seat. The base structure is shaped. The middle part is a quadrangular prism space. The center of the quadrangular prism space is used to install the main shaft assembly. Discharge channel.

7. Bracket: According to the different working places of the crusher-open-air operation or suffocation operation, you can consider configuring a bracket or not.

8. Transmission device: a belt drive mechanism driven by a single motor or dual motors (above 75KW, dual motor drive), dual motors drive two motors installed on both sides of the main shaft assembly, the two motor pulley belts and the main shaft pulley Side, balance the forces on both sides of the main shaft without generating additional torque.

9. Lubrication system: The special grade centralized lubrication of Mobil grease is adopted. The lubrication parts are the upper bearing and the lower bearing of the main shaft assembly. In order to facilitate the oil injection, the oil pipe is used to lead the machine to the outside of the machine for regular oil pumping.

Impact crushers are widely used in various metal and non-metal mines, cement, refractory materials, abrasives, glass raw materials, construction aggregates, machine-made sand, metallurgy and other industries. Through the introduction of this article, I believe everyone has a general understanding of the characteristics of impact crushers. Luoyang Zhongyuan Mining Machinery Manufacturing Co., Ltd. specializes in impact crushers, which are of high quality and low price, and can be customized according to customer needs. Interested parties are welcome to consult.

The coal briquettes formed by the briquette briquetting machine have high adhesion and good strength. If they want to meet the standard, they need to strictly follow the operation process. It is necessary to pay attention to the humidity of the material before production, and it needs to be dried after the pressurization is finished. The following is a detailed explanation of the production process of the briquette briquette machine, let’s understand it together.

1. Material handling

Before entering the briquette ball press, the materials should go through processes such as screening, crushing, humidifying, adding binder or additives, and mixing. After the pulverized coal material enters the compression mold of the forming equipment, the coal particles are in a natural distribution state. The force acting on the material is only gravity and the friction between the particles. These forces are small, and the contact area between the particles is also small. The system at this time is unstable and easily deformed under external force.

briquette making machine

2. External pressure

The external force begins to compress the unstable system, the particles begin to move, and the volume occupied by the material decreases. At this time, the consumed work is used to overcome the movement of the particles, the friction between the particles and the friction between the particles and the inner wall of the mold. The characteristics of this stage are that the pressure increases slowly, the material volume shrinks quickly, and the particles are densely packed. However, the particles are not deformed at this time. The pulverized coal can form a block with a certain shape, but the strength is very poor. -Touch and break.

3. Compression molding

The pressure increases rapidly until it increases enough to make the particles begin to deform, while the volume of the material decreases slowly. The decrease in the volume of the material at this stage is mainly due to the plastic or elastic deformation of the particles, but there is still relative movement between the particles. Therefore, the friction between the particles under high pressure has a great influence on the formation process. The function of Ding is to overcome the deformation of particles, the friction between the material and the inner wall of the pressure mold, and the exhaust of the air in the system. As the particles become denser with each other, the contact surface between the particles is greatly increased, and the stability of the system is close to that of natural lumps.

4. Exhaust air

Continue to increase the external force will cause the damage of the weak particles, and the larger the external force increases, the heavier the particles will break. At this time, the volume of the material is only slightly reduced, while the stability of the system is also reduced, and the mechanical strength of the block will decrease. The work consumed in this stage is used to overcome the damage of particles and exhaust the air in the system. In actual production of briquette, pressurization should be ended before this stage.

5. Stable rebound

After the external force is released, the volume of the compressed material block will slightly increase due to the rebound effect, and the contact area between the particles will decrease, and the stability of the system will also decrease. Therefore, the molding pressure should not be too large. The process should not be developed to the fourth stage above, because in the third stage above, the rebound force is less than the mechanical strength of the block, and the block can still maintain good stability after the external force is released. If the molding pressure is too high and the particles are crushed too much, the cohesion of the block will be greatly reduced. When the rebound force increases to the mechanical strength of the block, cracks will appear after the mold is demolded, or even expand and break. crack.

The above is an introduction to the five stages of briquette briquetting machine molding. In the production process, attention should also be paid to the raw material moisture, binder ratio, briquetting strength and porosity, so that the quality of the finished product will be good.