Silicon micropowder is a superhard material, and the resin polishing is polished as an abrasive abrasive (explained: friction makes objects (such as gold) smooth. ) Extensive applications in the grinding wheel and diamond polishing wheel, the silicon carbide itself has high hardness, and the particle size distribution is reduced, which is very difficult for silicon carbide fine powder. Difficult, With the development of industrial production, scientific and technological progress and market demand are growing, the production of silicon carbide fine powder puts forward higher requirements, including high productivity, low energy consumption, particle size distribution stenosis and low pollution. The production of JZL series airflow pulverizer is suitable for ultrafine pulverization of superhard materials such as silicon carbide, diamond, cubic boron nitride. The principle of the JZL airflow pulverizer is under high-speed airflow, and the particles are pulverized through the impact of the particles or the impact of the particles and the target. The airflow pulveration has the following characteristics: 1 High-speed airflow will generate a high speed, the particle impact strength (Strength) is large, can obtain micrometers or even submicron level ultrafine powder; 2 particle products are purity, low pollution; The particle size distribution of the product is narrow, the particle shape is smooth, and the particle dispersion is good; 4 nozzle discharged from the airflow due to the throttle effect temperature, which can be used for pulverizing the thermal material. At present, JZL airflow crushing and grading equipment is an ultra-fine processing equipment that is irreplaceable in silicon carbide fine powder industry (with a substance instead of another substance (mostly a strong person's position)), the ultra-fine processing equipment is taken as an example of a gas flow pulverizer and a grading system. The airflow pulverization and the grading process are as follows: (1) Rating wheel and system air volume (definition: the flow of air in unit time) on carbon (C) micron powder products according to the principle of grading, Silicon (Silicon) The grading of fine powder clearly needs to increase the speed of the grading wheel, the level of grading wheel speed determines the size of the centrifuge farm, and the size of the system air volume affects the size of the granules, in principle, to obtain as much as possible to the minimum as possible The resistance. In order to obtain the precise classification of silicon-fine powder, it is not economical to improve the grading rotation speed, and it is necessary to reasonably control the proportion of the auxiliary wind and the main style. The system is transported relative to small airWhen the line is adjusted, the change in the grading wheel speed is more sensitive. However, the reduction in total air volume will result in reduced processing volume, which is obviously uneconomical, so the system should be emphasized, and the best working conditions should be selected. (2) The feed mode of the raw material and the influence of the impact on product performance are commonly used, not only uniform (jūn yún) is poor, and the parts are wear, and the agglomeration and cakes directly affect the grading effect. The ultrafine pulverizer material enters the cylindrical pulverization chamber by the feed opening, and is crushed along the polishing wheel along the polishing rail, and cut off. The pulverized material brings out the pulverizer through the negative pressure air flow caused by the fan, into the material collection system, filtered through the filter bag, the air is discharged, the material, the dust is collected, and the pulverization is completed. The production of a vibrating feeder + shutter + long pipe gas delivery can be used to ensure that the powder entering the grading chamber is uniform, and quantitatively fed. The three winds introduced by the grading outdoor jacket, further helping the dispersion of fine powder, which makes the production operation stable (explained: stable stability; no change), workers are easy to operate, but also guarantee the quality of the product. At the same time, it is the key to improving the rational efficiency of the gas-solid concentration and good dispersion. (3) Product performance uses the carbon (C) of the silica fine powder produced by JZL airflow pulverizer and classification system, which can meet the W14, W10, W7, WS and other fine powder in GB / T 2477-83 standards along my country's abrasive industry. The product particle size distribution requirements, and reached the granular distribution requirements of the F1000, F1200, F2000 and other products in the JIS 86001-1987 of the Ingredients of abrasive microfloid for consolidating abrasives, and the fine powder yield reached 85%. The JZL airflow pulverizer has advantages such as high precision, no wear, high yield, and excensive applications in many superhard material manufacturers at home and abroad.