Ferrosilicon smelting is made of silica, coke, steel scraps and other main raw materials by electric furnace smelting. It is often used for steelmaking as a deoxidizer. At the same time, due to the large amount of heat released during the generation of SiO2, the energy consumption of steelmaking can be increased while deoxidizing.
（1） Production process flow. In general, the proportion of ingredients is strict, the silica is relatively fixed, the reducing agent should be adjusted according to the furnace conditions, and the proportion of oil coke, wood block and clean coal can be changed up and down. The grade of silicon products mainly depends on the quality of raw materials, the primary voltage and the design of furnace, the reduction effect of reducing agent and the effect of oxygen blowing. The raw materials such as silica, coke powder and steel chips are put into the smelting furnace according to a certain proportion, and then the power electricity and electrode paste are used to produce 1800 ℃ high temperature for smelting. Finally, the molten iron from smelting flows into the cooling tank after a certain period of time, and the finished product is formed after complete cooling.
（2） Production and operation characteristics. The ferrosilicon smelting industry is an industry with high energy consumption, high pollution, low automation and low technology content. In the production and operation process, the energy consumption of each link is relatively stable, the process is highly operational, the sales channel is single, and the product production cycle is short. At the same time, the silicon smelting is particularly affected by local power supply factors, and the price of raw materials and finished products fluctuates and fluctuates widely and irregularly. As an alloying element additive, ferrosilicon is widely used in low-alloy structural steel, bonded steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. Ferrosilicon smelting is a high energy-consuming enterprise with strict raw material ratio and technical requirements for production. The sales of products are superior to the silicon content of products, and the market price is also different. This requires the tax administrator to pay attention to the price changes in the international and domestic markets at any time, and keep abreast of the production status of the enterprise at any time.
