Future Development of China’s Silicon Metal and Silicon Metal Powder in the Deep Processing


China is the world’s leading producer of silicon metal. Due to the domestic low-level redundant construction and disorderly competition in the cut prices, China’s export price of silicon metal has been severely low all the time.

According to the market commentary, in addition to the impact of the downstream market, the sluggish export is an important reason for silicon’s price fall, which results from international series of measures. In 2012, EU carried out the anti-circumvention investigation for silicon metal originating in China; downstream polysilicon and PV industry also frequently encountered the anti-dumping; Chinese domestic market suffered from the impact of low-priced polysilicon from South Korea and America; all these factors made silicon metal prices remain as low as the cost price, while no one was interested in it.

In order to make Chinese silicon metal out of the current predicament and make Chinese silicon metal industry become competitive in international market, thus becoming a solid foundation industry to ensure the rapid development of China’s national economy and high-tech industry, enterprises under the country’s macro-control must pay attention to and speed up the implementation of specific measures and steps to upgrade the industry, so as to improve the industrial upgrading of silicon metal and promote silicon metal industrial restructuring. In the case of country’s macro-control, enterprise’s benefits will rise or fall for their different situations; this is the opportune time to adjust the industrial structure.

Enterprises of silicon metal industry gradually come to realize the necessity of speeding up industrial restructuring, so they will speed up the elimination of backward production capacity and small-capacity industrial silicon furnace. Hence, Industrial structure adjustment will be gradually achieved by the transition from high consumption to high efficiency, from roughing to finishing. In the process of industrial structural adjustment, it is necessary to accelerate corporate restructuring to form a number of enterprise groups. Enterprise groups with strength can use assets, resources and brand as a link, to achieve cross-regional and cross-industry restructuring, and to promote industrial intensive and large-scale development.

In the industrial restructuring, it is also necessary to promote the formation of division and cooperation between SMEs and large enterprises, and promote the rational flow and configuration of production factors. Only when enterprises gradually become bigger and stronger can enhance the competitiveness of Chinese silicon metal and better concentrate on responding to foreign anti-dumping to deal with the price discrimination in international market for Chinese exports of silicon metal.

Enterprises should develop deep processing equipments for silicon metal powder. The equipment is suitable for the production of silicon metal powder, with superior leak-proofness and high yields. And its bearings use a full seal and water cooling. It uses a high-speed maneuver method, throwing material out from the middle to the surrounding to impact walls of alloy back plate by the use of material itself centrifugal. This is to crush stones by stones, with a high yield. Its unique way and intensity control technology allow materials to grade after repeated collisions; thus qualified particles can be immediately discharged, which greatly improve the yield. Besides, particle size can be adjusted as required in a certain range. Industrial silicon can mainly be divided into two categories based on the applications: metallurgical silicon and chemical silicon. Metallurgical silicon is mainly used for the production of aluminum-silicon alloy and so on. While chemical silicon is used in the production of organic silicon, semiconductor materials and solar-grade silicon.

Only when enterprises develop the recycling economy, strengthen the resource conservation and improve the utilization efficiency of resources can continuously enhance the sustainable development of China’s industrial silicon industry. Broken silicon that does not meet particle size requirements of the finished products as well as scraps such as silicon powder that does not meet particle size requirements after the screening should be recycled directly or after some treatments. Some enterprises have firstly put crushed charcoal powder after washing, petroleum coke, crushed coal and other materials together; then using sodium silicate as a binder to be a briquette; finally as a reducing agent after drying. Silicon carbide and other materials are cleared from silicon metal furnace when the furnace is overhauled, and some can be applied directly back to the furnace while some can be sold to the steel industry.