Correct use method of ultra-fine grinder
1. The ultra-finegrinderand power unit should be installed firmly. If the ultra-fine grinder is fixed for long-term operation, it should be fixed on the cement foundation; if the grinder is mobile operation, the unit should be installed on a base made of angle iron, and the power machine (diesel engine or electric motor) and the grinder should be ensured The pulley grooves are in the same plane of rotation.
2. After the grinder is installed, check the fastening of each part of the fasteners, and tighten them if they are loose. At the same time, check whether the belt tightness is appropriate.
3. Before starting the grinding machine, turn the rotor by hand to check whether the claws, hammers and the rotor are running flexibly and reliably, whether there is any collision in the shell, and whether the rotation direction of the rotor is consistent with the direction of the machine arrow, power machine and grinding Whether the machine lubrication is good.
4. Don't change the belt pulley casually, in case the speed is too high to cause explosion in the grinding chamber, or the speed is too low to affect the working efficiency of the grinder.
5. After starting the grinding machine, it should be idling for 2~3min, and then feeding work after there is no abnormal phenomenon.
6. Pay attention to the operation of the grinder at all times during work, and feed evenly to prevent blocking the car, and do not overwork for a long time. If there are vibrations, noises, excessive temperature of the bearings and the machine body, or spraying materials, the machine should be shut down immediately for inspection, and the work should continue after troubleshooting.
Maintenance measures for the ultra-fine grinder, the machine must be cleaned up after the end of daily work. Fill the oil nozzle with lubricating oil at any time to protect the normal operation of the bearing and prolong the service life of the bearing. After working for 1000 hours, the bearing must be cleaned and replaced with calcium-based lubricant to half full to ensure good lubrication during use and prolong service life.
Factors affecting the adsorption of pulse dust collector
As the filtration time increases, more and more dust accumulates on the filter bag of the pulse dust collector, and the resistance of the filter bag increases, resulting in a gradual decrease in the processing air volume. In order for the pulse dust collector to work normally and control the resistance within a certain range, the filter bag must be cleaned. When cleaning dust, the pulse controller triggers the control valves in sequence, opens the pulse valve, and the compressed air in the air bag instantaneously sprays out into the filter bag through the pulse valve to the holes of the injection pipe. The dust attached to the surface of the filter bag falls off.
When the pulse bag filter is working normally, dust-laden gas enters the ash hopper from the air inlet. Due to the rapid expansion of the gas volume, some of the coarser dust particles fall into the ash hopper due to inertia or natural settlement, and most of the remaining dust particles follow. The airflow rises into the bag chamber. After being filtered by the filter bag, the dust particles are retained on the outside of the filter bag. The purified gas enters the upper box from the inside of the filter bag, and then is discharged into the atmosphere through the valve plate hole and the exhaust port. The purpose of dust removal.
As the filtration continues, the resistance of the dust collector also rises. When the resistance reaches a certain value, the ash cleaning controller issues a ash cleaning command. First, the lift valve plate is closed to cut off the filtered air flow; then, the ash cleaning controller pulses The solenoid valve sends out a signal, and as the pulse valve sends the high-pressure reverse airflow used for dust removal into the bag, the filter bag swells rapidly and produces strong shaking, which causes the dust on the outside of the filter bag to shake off and achieve the purpose of dust removal. Since the equipment is divided into several box areas, the above process is carried out on a box-by-box basis. When one box area is cleaning dust, the rest of the box areas are still working normally, ensuring the continuous and normal operation of the equipment. The key to the ability to handle high-concentration dust is that this strong cleaning method requires extremely short cleaning time.
The factors that affect the adsorption of the pulse dust collector are the nature of the adsorbent and the operating conditions. Only by understanding the factors that affect adsorption, can we choose suitable adsorbents and suitable operating conditions, so as to better complete the task of adsorption and separation.
1. Under normal circumstances, low-temperature operation is conducive to physical adsorption, and a proper increase in temperature is conducive to chemical adsorption. However, whether to raise or lower the temperature must be based on the adsorption melting during the adsorption process. If the melting becomes a positive value, increasing the temperature is beneficial to the adsorption operation; otherwise, lowering the temperature is beneficial to the adsorption process. The influence of temperature on gas phase adsorption is greater than that on liquid phase adsorption. For gas adsorption, pressure increase is conducive to adsorption, and pressure decrease is conducive to desorption.
2. The properties of the adsorbent, such as porosity, pore size, particle size, etc., affect the specific surface area, thereby affecting the adsorption effect. Generally speaking, the smaller the particle size of the adsorbent or the more developed the micropores, the greater the specific surface area and the greater the adsorption capacity. However, in the liquid phase adsorption process, the surface area provided by the micropores does not have a significant effect on the adsorbate with a large relative molecular mass.
3. The nature and concentration of the adsorbate have a certain influence on the gas phase adsorption. The equivalent diameter, relative molecular weight, boiling point and saturation of the adsorbate affect the adsorption capacity. If the same kind of activated carbon is used as an adsorbent, for organic substances with similar structures, the greater the relative molecular mass and unsaturation, the higher the boiling point, and the easier it is to be adsorbed. For liquid phase adsorption, the molecular polarity of the adsorbate, relative molecular weight, and solubility in the solvent affect the adsorption capacity. The greater the relative molecular mass, the stronger the polarity of the molecule, the lower the solubility, and the easier it is to be adsorbed. The higher the adsorbate concentration, the lower the adsorption capacity.
4. The activity of an adsorbent is an indicator of the adsorption capacity of the adsorbent, and it is often expressed as a percentage of the ratio of the mass of adsorption on the adsorbent to the total amount of adsorbent. Its physical meaning is the adsorption mass that can be absorbed by a unit of adsorbent.
5. Ensure that the adsorbent and the adsorbent have a certain contact time, so that the adsorption is close to equilibrium, and make full use of the adsorption capacity of the adsorbent. The time required for adsorption equilibrium depends on the adsorption rate, and the contact time is generally determined through economic trade-offs.
The performance of the adsorber of the pulse dust collector has a significant influence on the adsorption effect. The structure of the adsorber and the laying of the adsorption layer should be designed reasonably to ensure that the adsorber exerts its excellent adsorption performance.
What are the advantages of ceramic-lined jet mill
The ceramic-lined jet mill is mainly composed of a feeding device, a crushing chamber, a discharge port, a steam distribution pipe and a nozzle. The material of the feed nozzle and the grinding nozzle is made of high-strength wear-resistant and high-temperature alloy, and the nozzle structure is supersonic design; the rest of the flow parts are lined with high-strength wear-resistant and high-temperature engineering ceramics, and the feed venturi tube , The ceramic middle ring, the lining of the discharge port, the ceramic upper cover and the ceramic lower cover are made of high-strength reaction sintered silicon carbide; the steam distribution pipe and the main body cover are all made of stainless steel and polished. The appearance of the whole machine is beautiful and compact. The ceramic lined jet mill can be used in conjunction with the jet classifier. According to the physical characteristics of the material and the purity requirements of the finished product, ceramic sheets are lined inside the equipment to increase wear resistance, reduce the impact of materials on the equipment, and increase the use of the equipment Life, and control the iron content of the material in the grinding and classification process. The ceramic-lined jet mill has successfully solved a series of problems such as the adhesion of battery materials, the lack of fineness, and uneven classification.
The working principle of the ceramic-lined jet mill: After being filtered and dried, compressed air is sprayed into the grinding chamber at high speed through the Laval nozzle, and the animal material is repeatedly collided and rubbed at the intersection of the high-pressure airflow to smash. The pulverized coarse and fine mixture is under negative pressure. The fan reaches the classification zone. Under the action of the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. The materials that meet the particle size requirements are collected by the cyclone separator and dust collector through the classification wheel, and the coarse particles descend and continue to grind in the grinding zone. .
The ceramic-lined jet mill has the following performance advantages:
1. It is suitable for dry grinding of various materials with Mohs hardness below 9, especially suitable for the grinding of materials with high hardness, high purity and high added value.
2. The breakthrough of particle acceleration technology has greatly improved the grinding efficiency and reduced the energy consumption. It has small over-crushing, good particle shape, narrow particle size distribution and no large particles, and the product particle size D97=3-74 microns can be adjusted arbitrarily.
3. During the grinding process, the airflow temperature is reduced due to the rapid expansion of the airflow, which is especially suitable for the grinding of heat sensitive, low melting point and volatile materials.
4. Materials collide and grind, which is different from mechanical pulverization, which relies on the impact grinding of materials such as blades or hammers, and the addition of ceramic lining, so the equipment is less worn and the product is of high purity.
5. It can be used in series with a multi-stage air classifier to produce products with multiple particle sizes at one time.
6. The ceramic-lined jet mill is compact in structure, easy to disassemble and clean, and the inner wall is smooth and has no dead corners.
7. The entire system runs in a closed vacuum with no dust, low noise, and the production process is clean and environmentally friendly.
Advantages of jet mill
The structure of the jet mill: It is mainly composed of a grinding chamber, a nozzle orifice, a material outlet, an air flow outlet, a compressed air inlet, and a classification zone. The flat jet mill has a wide range of applications due to its simple structure and easy manufacturing.
Working principle: The compressed air or superheated steam is transformed into high-speed air flow through the nozzle. When the material is fed into the crushing chamber through the feeder, it is sheared by the high-speed air flow. The strong impact and intense friction make the material grind into ultra-fine products. The power engine and grinder are smooth and not prominent. Do not change the pulley at will, lest the speed is too high to cause the grinding chamber to burst, or the speed is too low, which will not affect the working efficiency of the grinder. The jet mill should be idling for 2-3 minutes after starting, and there should be no abnormal phenomena before the feeding operation. Pay attention to the working status of the grinder during the operation, feed evenly, prevent clogging, and do not overload the operation for a long time. If there is vibration, noise, bearing and body temperature too high, the appearance of spraying should be stopped immediately, and the operation should be continued after troubleshooting. With the development of society, some devices have made great breakthroughs in order to play a better role. The jet mill has a good effect on the grinding target and occupies a special position. In the process of operation, the use of the jet mill should pay attention to certain operations, which cannot meet the production needs and work overload. Therefore, we should pay attention to the maintenance of the jet mill to ensure its efficiency.
Advantages of jet mill
1. Non-heating, especially suitable for ultra-fine grinding of heat-sensitive materials. In addition, air can be replaced with inert gas, which is suitable for grinding inflammable and explosive materials.
2. The pollution is very small. Since the grinding principle is the collision grinding of the material itself, compared with other grinding forms, the method of blade or ball grinding will be introduced into other grinding media for comparison. The jet mill is a pulverizing process with minimal pollution, especially suitable for industries such as medicine and food.
3. It is easy to clean, and the internal transmission of airflow grinding is smaller than other ultrafine grinding machines. In particular, the spiral airflow grinder is simple in structure, easy to clean, has no dead ends, and can be used as a sterile medicine grinder.
What are the common non-metallic mineral powder fillers
Non-metallic mineral powders are widely used in plastics, rubber, papermaking, coatings, wires and cables, electronic packaging and other products, mainly for filling, reducing production costs, improving product performance, improving production processes, and enhancing the competitiveness of enterprises . Some common powder processing fillers in the market now include calcium carbonate, barium sulfate, talc, silica powder, wollastonite, mica powder, kaolin, bentonite, and so on. At present, as downstream enterprises have higher and higher requirements for powder characteristics, non-metallic mineral powder fillers are developing in the direction of high purity, ultra-fineness and functionalization.
Calcium carbonate: Calcium carbonate is a product with abundant resources and low price among non-metallic mineral powder fillers. Therefore, it has almost become the first choice for non-metallic mineral powder fillers. If calcium carbonate powder can meet the needs of filling and related functions, other more expensive fillers will not be considered.
Talc powder: Talc has excellent properties such as lubricity, acid resistance, insulation, high melting point, good hiding power, good gloss, and strong adsorption. It has a wide range of applications in plastics, rubber, papermaking, paint and other industries. In coatings and other industries, it can replace part of the expensive titanium dioxide.
Barium sulfate: According to different production processes, it can be divided into barite powder and precipitated barium sulfate powder. Barium sulfate powder is mainly used in the paper industry, paint, rubber and plastic industries. Barium sulfate is used in powder coatings. It has the characteristics of high gloss, good leveling, strong weather resistance, and stable chemical properties. It is the main means to increase the powdering rate. Used in rubber products as a filler and a reinforcement, it can enhance the anti-aging performance and weather resistance of the product, the product is not easy to age and become brittle, and can significantly improve the surface finish and reduce the production cost. Good gloss and transparency can be obtained when used in the filling masterbatch.
Silicon powder: In the industry, silicon powder is also called quartz powder. It has the characteristics of excellent dielectric properties, low thermal expansion coefficient and high thermal conductivity. It is widely used in silicone rubber, coatings, adhesives, precision casting, ceramics, epoxy resin potting materials, as well as insulation casting and integration of ordinary electrical appliances and high-voltage components. Circuit molding materials and potting materials, welding rod protective layer and other resin fillers, etc.
Wollastonite and mica powder: Among the non-mineral powder products, wollastonite and mica powder are two types of powder with relatively special particle morphology. The needle-like structure of wollastonite and the aspect ratio of the powder are one of the important indicators for investigation. Mica powder has a flake structure, and the diameter-to-thickness ratio of the powder has an important influence on its application. Wollastonite powder has needle-like, fibrous crystal morphology, high whiteness and unique physical and chemical properties. It is widely used in ceramics, paints, coatings, plastics, rubber, chemicals, papermaking, welding electrodes, metallurgical protective slag and as asbestos Substitutes, etc. Muscovite and phlogopite have good electrical insulation, non-conductivity, acid resistance, alkali resistance and pressure resistance, so they are widely used to make insulating materials in the electronics and electrical industries. Lepidolite is also the main mineral raw material for extracting lithium.
Kaolin, bentonite: Kaolin has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, plastics, chemicals, coatings, medicine, and national defense. The ceramic industry is an industry that used kaolin earlier and used a larger amount. Kaolin is used as a material in the rubber industry. Adding it to the latex mixture can improve the properties of rubber, increase the mechanical strength of rubber products, enhance wear resistance and chemical stability, and extend the hardening time of rubber. Kaolin is used as a filler in the plastics industry. Its function is to make the surface smooth, reduce thermal cracking and shrinkage, facilitate polishing, and resist chemical corrosion.
Bentonite: also known as bentonite, bentonite, and the popular name Guanyin clay, known as "a thousand kinds of minerals", it is widely used in metallurgical pellets, casting, drilling mud, textile printing and dyeing, rubber, paper, fertilizer, Pesticides, improved soil, desiccants, cosmetics, toothpaste, cement, ceramic industry, nano materials, inorganic chemicals and other fields.
Brief introduction of cyclone dust collector
The cyclone dust collector is a dust collector that uses the centrifugal force in the high-speed rotating dust-containing airflow to separate dust from the air. Because of its simple structure and easy production, it is widely used. Compared with the gravity sedimentation chamber, the particle size of the dust to be processed is smaller, and the space required to process the same amount of gas is also much smaller. However, the pressure loss of the cyclone dust collector is generally higher than that of the settling chamber, so it consumes more power.
The advantages of cyclone dust collector are:
(1) The equipment has a simple structure and low cost;
(2) The device has no moving parts and is easy to maintain;
(3) It can withstand high temperatures, for example, it can withstand temperatures up to 400°C. If special high-temperature materials are used, it can withstand higher temperatures;
(4) It can withstand high pressure (positive pressure and negative pressure) to collect dust from high-pressure gas;
(5) After the dust collector is covered with a wear-resistant lining, it can be used to purify the flue gas containing high abrasive dust.
The disadvantages of cyclone dust collectors are:
(1) The efficiency of capturing fine dust (less than 5μm) is not high;
(2) Since the dust collection efficiency decreases with the increase of the cylinder diameter, when the processing air volume is large, multiple cyclone dust collectors must be used. If the setting is improper, it will have a greater impact on the dust collection performance.
The housing of the cyclone dust collector is composed of an outer cylinder and a cone. The top of the outer cylinder is closed, and there is an exhaust pipe in the center. The gas inlet pipe is located on the side of the cylinder and is tangent to the outer cylinder. The bottom of the cone is provided with an ash warehouse and a lock air gate. The dust-laden gas enters the device along the tangential direction of the outer cylinder from the air inlet at a higher speed (usually 12-25m/s), and produces a strong rotational movement along the annular space outside the inner cylinder (exhaust pipe). , Divided into two swirling airflows upward and downward. The upward airflow reaches the top cover and then spirals downwards. The downward airflow spirals between the inner and outer cylinders due to the restriction of the inner and outer circle and the upper cover, forming an outer swirling flow. During the rotation, most of the dust particles are thrown to the periphery of the cylinder under the action of inertial centrifugal force, hit the wall of the vessel, lose kinetic energy, slide down the wall, and fall into the ash bin. The dust particles accumulated in the ash bin are automatically discharged through the gate. When the descending outer swirling airflow follows the bottom of the cone, it turns back and rises, forming a bottom-up spiraling inner swirling flow, and is discharged from the top as purified gas through the central exhaust pipe.
Characteristics of Nitrogen Protected Grinding Equipment
Nitrogen protection grinding equipment is suitable for the grinding of explosive and oxidizable substances. The grinding effect of nitrogen protection airflow grinder is good, and the stability and safety are higher than that of general airflow grinder. The nitrogen-protected grinding equipment has a compact structure, polished inner and outer walls, no stock in the grinding box, no dead corners, easy to clean, and meets GMP requirements.
The materials collide and grind, and the materials with Mohs hardness 1-10 can be processed. The products are free of iron pollution and can be mixed and pulverized with several materials; good grinding efficiency and strict particle size distribution can be obtained, and the grinding particle size can be 2 -74μm can be adjusted arbitrarily, up to sub-micron level, and material loss is small; the whole system adopts a touch screen automatic control system, which can realize one-button start and stop, simple and convenient operation, and realize remote control.
Features of Nitrogen Protection Grinding Equipment:
1. Oxygen isolation: Before starting the feed, replace the air in the closed circulation system with nitrogen. At the same time, the closed feeding and unloading system can replace the air in Shaoli during the feeding and unloading process with nitrogen to maintain the oxygen in the system. The content is basically stable. During the grinding process, an oxygen content tester is used to continuously monitor the oxygen content in the airflow, and when it exceeds a certain level, nitrogen is added immediately to keep the oxygen content within the safety production standard.
2. Control the concentration of gas and powder: the feeding system is a fully enclosed, uniform speed device, which is programmed and controlled by the control cabinet. Fully enclosed plays the role of isolating oxygen, while the uniform speed controls the concentration of the materials inside the added equipment, and the feeding speed can be set arbitrarily. If the materials added to the equipment at a constant speed accumulate inside the equipment, there is no guarantee of safety. Therefore, the shape of the equipment, such as the bending angle of the pipe, the shape of each part, etc., are scientifically calculated to eliminate the dead corners inside the equipment. At the same time, the high-speed airflow in the equipment is driven and washed, and the powder will not accumulate in the pipe.
3. Timely release of static electricity and elimination of ignition sources: The special filter material with carbon steel wire used for the pulse blowback collector can eliminate static electricity in time and ensure that the pulse cleaning is clean and thorough. The nitrogen protection grinding equipment is all metal components, all grounded, and try to release the powder static electricity.
4. Circulating air cooling: Because the whole system is a closed circuit system, there are multiple moving parts inside the equipment, which will produce a certain temperature during high-speed movement, and the temperature is very important to the safety of processing. Therefore, the equipment is equipped with a fin-type cooler on the pipeline, which can effectively reduce the safety hazards caused by the equipment working for a long time or working in a high temperature environment.
Basic conditions for choosing an ultra-fine grinder
- Material properties
The nature of the material includes the nature and density of the abrasive material. Under the action of the negative pressure airflow caused by the fan, the material ground by the airflow mill is taken out of the grinding chamber, enters the material collection system, filtered by the filter bag, the air is discharged, the material and dust are collected, and the grinding is completed.
The ultra-micro grinding machine is a device that uses air separation, pressure grinding, and shearing to achieve ultra-micro grinding of dry materials. It is composed of cylindrical grinding chamber, grinding wheel, grinding rail, fan, material collection system and so on. The material of the superfine pulverizer enters the cylindrical grinding chamber through the feeding port, and is crushed and sheared by the grinding wheel that moves in a circular motion along the grinding rail to realize grinding.
- Material status
The material status mainly refers to the humidity and temperature of the material. Unlike wet grinding, in dry grinding, the water content of the material cannot exceed 3%, otherwise the processing capacity of the grinder will drop sharply, especially the dry ball mill is more important.
- Material size
Unlike the crusher, the feed size has a great influence on the output of the crusher, and is one of the main factors affecting the processing capacity of the grinder. Therefore, the energy consumption in the crushing and grinding stages is different, and the energy consumption in the crushing stage is much less. It is very important to apply the principle of more crushing and less grinding in the crushing operation. Therefore, in the crushing stage with less energy consumption, the material should be crushed to a finer particle size as much as possible to reduce the energy consumption in the grinding operation.
- Grinding ability
Even if the product needs to be grinded according to the requirements, the crusher can be selected to obtain the same size of material particles, and then the appropriate grinder can be selected according to the type and size.
- Grinding method
Grinding methods are divided into wet and dry methods. Wet grinders: limited to rotary grinders and tower grinders that use steel balls or other media, and there are also many dry grinders. Which type of grinding machine is used is affected by the operation before and after grinding, the number of grinding sections, and the choice of grinding process.
The composition & function of the air classifier system
Some application fields of ultrafine powder have certain requirements on the particle size distribution or gradation of ultrafine powder. Only fine classification of ultrafine powder products can meet the requirements, such as microelectronics, advanced ceramics, advanced abrasives, paper fillers and Coatings, plastics and rubber fillers, paint pigments or fillers, toners and other industries. Airflow classifier is a professional equipment for fine classification of ultra-fine powder, and it has been widely used in various fields.
The air flow classifier is mainly composed of a feeding control system, a classifier host (1-4 units), a high-efficiency cyclone collector, a pulse bag filter, a high-pressure induced draft fan and an electrical control system.
(1) Feeding control system: The feeding control system is composed of a star feeder or a vibrating feeder combined with a frequency conversion control instrument, a feeding bin, etc., and a continuous uniform speed control of the feeding is achieved by adjusting the output frequency/current level of the feeder.
(2) Classifier host: The classifier host is mainly composed of a motor, a grading wheel, a cylinder, etc., which can effectively classify materials by adjusting the speed of the grading wheel and cooperating with the secondary air.
(3) The impeller of the classifier is adjusted by the frequency converter, and protection measures such as loss of voltage protection, over current protection, material level control, operation status monitoring and alarm system are designed.
(4) Cyclone collector: This equipment is a first-level collection system in classified products. After the dust-laden airflow enters the cyclone collector, due to the centrifugal force, the powder will slide down the wall of the cylinder and be separated and purified at the end of the inner cone. The purified gas and a small amount of fine powder are discharged through the cyclone center tube.
(5) Pulse bag filter: This equipment consists of a bag collection device, a pulse cleaning device and a pneumatic control device.
Performance characteristics of air classifier
Air classifiers are often used in series with grinding equipment because it can precisely control the particle size of the finished product. For example, the airflow grinding equipment with a classification system is screened by the classification system after grinding, and the particles of qualified particle size are passed through the classification wheel with the airflow to the next process, and the coarse particles that do not meet the particle size are returned to the grinding chamber to continue grinding. Because of the precise screening function of the air classifier, it can be used not only alone, but also in series with most grinding equipment.
The principle of the air current classifier is that the material is quantitatively raised to the classification area through the feeder under the action of negative pressure air, and under the action of the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated, and the fine particles meeting the particle size requirements pass through The gap between the grading wheel blades enters the cyclone separator or the dust collector to collect, the coarse particles entrained by the part of the fine particles hit the wall and the speed disappears, and descends along the cylinder wall to the secondary air outlet. After the strong elutriation of the secondary air, the coarse and fine particles are separated. The fine particles rise to the classification zone for secondary classification, and the separated coarse particles are discharged through the unloader.
Performance characteristics of air classifier
- It is suitable for fine grading of powder, the particle size of the grading product can reach D50:1~45μm, the product size can be adjusted, and the variety change is extremely convenient.
- High classification efficiency (extraction rate) 60% to 90%.
- The classification accuracy is high, the particle size distribution is narrow, and oversized particles and sieve residues in the product are completely eliminated.
- Low rotation speed and long service life: The rotation speed of the classification wheel is 50% lower than other horizontal and vertical classifiers for the same classification particle size. When producing powder with Mohs hardness <5, the grading wheel has no abrasion; when producing powder with Mohs hardness ≥ 7, the service life of the grading wheel is 5-8 times longer than that of other horizontal and vertical types.
- The vertical grading turbine device is adopted, which has low speed, wear resistance and low system power configuration.
- Multi-stage classifiers can be used in series to produce products with multiple particle sizes at the same time.
- It can be used in series with jet mill, impact mill, ball mill, vibration mill, Raymond mill and other grinding equipment to form a closed loop.
- The system is produced under negative pressure, no dust pollution, excellent environment, high degree of automation, strong stability, and easy operation.