The main raw materials of metallic silicon 441 are silica, petroleum coke, wood chips, etc., which are smelted by electric furnaces. So do you know the production process of metallic silicon 441? Let's take a look:
1) After the raw material silica is washed, screened and dried, it is batched in different proportions according to the type of reducing agent used. A computer program is used to control the proportion of each material, and is collected from the silo onto a belt. Through the feeding process Mix evenly and enter the electric furnace; the highly automated and large-scale feeding process is carried out continuously.
2) A current is passed through the electrode to heat the material in the skull to a high temperature of more than 1800 degrees Celsius. Silicon is restored in the skull and becomes liquid. It is released through the silicon outlet and cast into silicon ingots. After crushing, it is processed according to the customer's requirements. Pack according to the required size.
3) Use the bottom blowing method of mixing oxygen and air. The breathable bricks for bottom blowing oxygen are installed in the bottom of the bag. There are many thin copper tubes in the breathable bricks. Oxygen and air are blown from the thin copper tubes to the silicon melt for refining. , after the oxygen blowing is completed, the air also forms a positive pressure into the silicon melt through the breathable bricks. The refining process requires stirring, which uses compressed air to stir. The purpose is to improve the kinetic conditions of the slag-metal element phase reaction, accelerate slag formation, remove impurities as quickly as possible, and reduce heat loss and silicone liquid sticking.
