Ultra-fine Mill Promotes The Development Of Silicon Carbide

Silicon carbide micropowder is widely used in refractory materials, wear-resistant flooring, foam ceramics, special coatings, anti-corrosion paints, de-flowing environmental protection and other industries. At the same time, silicon carbide ultra-fine micro-powder is an ideal material for the production of SiC ceramics, and silicon carbide micro-powder is also Engineering materials for the solar photovoltaic industry, the semiconductor industry, and the piezoelectric crystal industry. In the era of underdeveloped technology, it is not easy to use silicon carbide micropowder. Now we have a superfine mill, so we have good technical support.

At present, domestic silicon carbide micropowder is mainly black silicon carbide micropowder and green silicon carbide micropowder. The main standards of silicon carbide micropowder are: national standard, Japanese standard, and European standard. The market is dominated by national and Japanese standards, while exports are mainly Japanese. The ultra-fine mill is ideal for grinding silicon carbide powder.

The production process of silicon carbide micropowder: (1) taking silicon carbide raw material, crushed by crusher, and sieved to silicon carbide particles of not more than 5mm, and then shaping it to a silicon carbide particle of not more than 2mm by using a shaping machine. And wherein the oval particles account for more than 80%, and then pickling and removing impurities and drying; (2) pulverizing the dried silicon carbide particles into a silicon carbide powder having a d50=9.5-11.5 μm by a mill. When pulverizing, the main current of the mill is set to 65-75A, the fan flow is set to 40-50m3/min, and the speed of the analyzer is 400-600 rpm. (3) Then the carbonization is performed by the vortex flow classifier. When the silicon powder is classified and classified, the flow rate of the fan of the vortex flow classifier is 25-43 m3/min, the speed of the classifying wheel is 2600--3300 rpm, and the finished product A with the particle size ds94=6.5-5.5 μm is separated from the classification port. The cyclone mouth is divided into semi-finished products of ds94 ≤ 5.5μm; (4) The semi-finished products separated by the vortex flow classifier cyclone are further classified by the impeller type airflow classifier, and the fan flow of the impeller type air classifier is classified. 25-10m3/min, the grading wheel speed is 1300--1700 rev / min, and the granules are separated from the grading port. Ds94 = B 4.5-3.0μm is finished, the cyclone inlet is separated by-products.

Due to the characteristics of the silicon carbide micropowder production process, the increasing demand for silicon carbide micropowder will bring huge development opportunities to the pulverizer and vibrating screen industry, and the performance requirements are particularly high.