Market prospect of Chinas silicon carbide industry

According to the analysis report on market prospect and investment planning of China's silicon carbide industry from 2017 to 2022 issued by a research institute, there are more than 200 silicon carbide enterprises in China, with an annual production capacity of more than 2.2 million tons, and more than 300 sand and fine powder processing enterprises, with an annual production capacity of more than 2 million tons.

However, the demand for silicon carbide in the domestic market is only 700000 tons, which is mainly used in the field of low value-added abrasives and refractories. The domestic high-end markets such as smart grid, new energy vehicles and military electronic systems are still in the early stage of development, and the market for silicon carbide has not been fully opened. The annual export volume of silicon carbide is about 300000 tons, Therefore, China's silicon carbide industry is currently facing overcapacity, homogeneous production and low-cost competition are still obvious, green silicon carbide has fallen sharply, process bottlenecks are prominent, enterprise R & D strength is insufficient, and environmental protection problems are still not well solved.

Silicon carbide raw materials in view of the above problems, the abrasive tools branch of China Machine Tool Industry Association believes that there are two key directions for the development of silicon carbide industry in the future: first, silicon carbide capacity reduction and in-depth development are the general trend. The serious excess of silicon carbide capacity is obvious to all. With the acceleration of transformation and upgrading and structural adjustment, extensive production obviously has no competitiveness, The industry reshuffle has begun. With the acceleration of integration and elimination, large-scale enterprises should strengthen regional cooperation, standardize management, increase investment and gradually move towards the direction of deep processing; Second, silicon carbide as an industrial raw material, after nearly 70 years of development, it is urgent to expand new application fields. Enterprises should broaden their horizons, actively look for new fields, increase investment in scientific research, strengthen communication between regions, strengthen communication with governments, and strive for policy support.

This time, silicon carbide has entered the automotive application field, which undoubtedly points out a new development direction for the current silicon carbide industry.

The silicon carbide abrasive products used in the market need to be sieved layer by layer, and the particle size corresponding to each screen is different.

Many manufacturers pass silicon carbide granular materials through one or more layers of screens to divide them into several particle size levels according to their size, which is called screening.

4#-240# silicon carbide abrasives are currently produced by screening method, because generally speaking, compared with hydraulic, wind, centrifugal classification and other methods, it has the advantages of high production capacity and high classification accuracy. The main tool of screening operation is screen; The classification task is completed by the screen mesh with a certain size. For each layer of screen, the material left on the screen after screening operation is called the product on the screen, and the material passing through the screen hole is called the product under the screen. The conditions for a particle to pass through the screen are: 1. The silicon carbide particle is smaller than the screen hole, and 2. There is sufficient opportunity for screening. Therefore, in the actual production process, the corresponding number of screen size is also very key.