• 27 Oct, 2022
• By EPIC Powder
• 2 Comments

What kind of airflow pulverizer can be used for metal silicon? EPIC Powder Machinery

Various types of air flow pulverizers on the market have different performance and application scope due to different manufacturers. What type of air flow pulverizer should be used for metal silicon crushing? Through a large number of practical cases, MQW air flow pulverizer is more suitable for the processing and preparation of metal silicon, which will be introduced by Xiao Bian

MQW jet mill is a new type of special crushing equipment developed by EPIC Powder Machinery Co., Ltd. for the processing requirements of metal silicon (coarse product size, high yield requirements). The special production line for silicon metal powder developed by the company [the special airflow crushing unit for silicon metal powder] mainly has the advantages of high yield, large output, low equipment wear, low equipment maintenance rate, high product purity, clean production environment, etc. Comparison of advantages of MQW air jet mill for silicon metal 1. Yield Our air jet mill accelerates materials to a consistent crushing strength by establishing a uniform crushing flow field, and the qualified particles of materials are quickly separated after a collision; The materials stay in the crushing chamber for a very short time, which effectively avoids the over crushing of products and improves the yield. When producing 40-120 mesh (+40≤ 25%, - 120 mesh≤ 10%) products, the yield shall not be less than 87%; When producing 40-325 mesh (+40≤ 1%, - 325≤ 1%) products, the yield shall not be less than 85%. Other mechanical crushing cannot establish a uniform crushing force field. After multiple collisions, some qualified particles cannot be discharged in time after crushing, resulting in over crushing, which increases the content of fine powder, and the yield is relatively low. In addition, there are few adjustment methods for mechanical mills. Generally, the grinding force can only be controlled by adjusting the speed of the mill, which has certain limitations. The equipment is easy to wear, and has a great impact on the particle size distribution and yield of products. 2. Screening Our company's air flow crusher is equipped with an efficient turbine classifier. After the materials are crushed, the fine powder is separated by the turbine classifier, and the finished products and coarse particles are screened again. In this way, the materials are easy to pass the screen, which not only greatly improves the screening efficiency, extends the service life of the screen, but also ensures the screening rate of the materials. Due to the small content of fine powder in the screening materials, the fine powder flying in the screening process is avoided, The production environment is clean. The particles crushed by the mechanical mill are of mixed size, and the coarse and fine powders are mixed together. During screening, the fine powder is easy to adhere to the coarse particles and is not easy to pass through the screen. The materials stay on the screen for a long time, wear the screen greatly, the screening efficiency is relatively low, and the dust in the screening process is large. And more superfine powder adhere to qualified particles, which will have a certain impact on product quality. 3. Equipment wear and maintenance rate The air flow pulverizer unit of our company uses air flow as the pulverizing power, and the equipment itself has no rotating parts, which greatly extends the service life of the main machine's pulverizing parts. The MQW type air flow pulverizer unit specially designed for metal silicon has not been replaced by our customers after nearly two years of use. The main crushing equipment is extremely worn, and the equipment can operate stably for a long time, with stable product quality. The main wearing part of the air flow pulverizer is the grading wheel of the turbine classifier, which has a service life of more than 1500 tons, is easy to replace and has a short time. The mechanical mill uses a medium to impact, spin and roll the materials. Due to the high hardness of metal silicon and its sharp angle shape, the solid wear on the equipment is quite large. Generally, the maintenance and replacement of spare parts are required within 3-5 days. The equipment maintenance workload is large, the cost of wearing parts is high, and the replacement is time-consuming, affecting production. 4. The difference of product purity The air flow pulverizer uses air flow to crush materials. The wear of the equipment is very small, and the parts that are easy to wear are all treated with wear-resistant protection. Therefore, the product has high purity and does not need magnetic separation and pickling. The mechanical mill uses a medium (hammer) to crush materials at high speed. The equipment is severely worn, and the worn impurities are naturally brought into the product, causing product pollution and increasing iron content. 5. Differences in particle morphology The particle size distribution of the products produced by our air flow pulverizer is uniform and normal, the surface is honeycombed with large specific surface area observed under the electron microscope, and there is very little superfine powder adhered to the finished product particles, which is conducive to the production of the next process. The particle size distribution of the products produced by the mechanical mill is uneven, and there are stages. The particles are in sheet/strip shape, the surface is too smooth, and the specific surface area is small. Because there is no air flow classification device in the system, the particle surface is adhered with ultra-fine powder, which has a certain impact on the product quality. 6. Differences in production environment The whole system of our air flow pulverizer is operated under full negative pressure. The equipment adopts the most advanced offline pulse dust remover in separate rooms. There is no dust in the whole production process. The production environment is clean and there is no fine powder loss. During the production of mechanical mill, the dust is large, the production environment is very poor, and the silicon powder loss is large. It can be seen from the above that MQW jet mill has outstanding advantages in the processing of metal silicon and has great development potential. In addition, MQW jet mill is also used in chemical industry, minerals, metallurgy, abrasives, ceramics, refractories, medicine, pesticides, food, health products, new materials and other industries, and has excellent effect, which is favored by the majority of users