Silicon Alloy is a strong composite deoxidizer, which can replace pure aluminum to improve the utilization rate of deoxidizer in the steelmaking process, and can purify molten steel and improve the quality of molten steel. The demand for 2202 metal silicon for aluminum used in automobile and other industries is quite large, so the development of the automobile industry in a region or country directly affects the rise and fall of the industrial silicon market.
Industrial silicon is also used as an alloying agent for silicon steel with strict requirements, and a deoxidizer for smelting special steel and non-ferrous alloys.
Silicon metal 2202# is purified through a series of processes to produce polycrystalline silicon and monocrystalline silicon, which are used in the photovoltaic industry and the electronics industry. Crystalline silicon cells are mainly used in solar rooftop power stations, commercial power stations and urban power stations with high land costs. They are currently the most mature and widely used solar photovoltaic products, accounting for more than 80% of the world’s photovoltaic market. The demand for metal silicon has grown significantly.
The traditional smelting method of 2202 Si metal is to mix and smelt silica, stone tar and charcoal in equal proportions, and use low-ash petroleum coke or pitch coke as the reducing agent. However, due to the small resistivity and poor reaction ability of these two cokes, charcoal (or wood blocks) with low ash content, high resistivity and strong reaction ability must be used to replace part of the petroleum coke, which consumes a lot of power. At the same time, the elements in the raw materials are recovered The rate is low, resulting in waste of resources and environmental pollution.
Reed stalks, straw, wolfberry stalks, flax stalks and other raw materials are used instead of charcoal, and the furnace type is improved: the height of the furnace bottom is increased from 2.2m to 2.5m. The original self-baking electrode using electrode paste is changed to a finished graphite electrode with a height of 12m; a 10cm castable protection device is added to the lower part of the pressure ring; the invention reduces beneficial elements, improves recovery rate, and removes impurities. According to the demand of OEM production, produce industrial silicon products, reduce the cost of enterprises, and realize the recycling of resources.