Production process of metal silicon 441
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Production process of metal silicon 441
The main raw materials of metal silicon 441 are silica, petroleum coke, sawdust, etc., which are smelted in electric furnaces. So do you know the production process of metal silicon 441? Let's take a look:
1) After the raw silica is cleaned, screened and dried, different proportions are prepared according to the type of reducing agent used, and the proportion of each material is controlled by a computer program. Mix and enter the electric furnace; the feeding process with high automation and scale is carried out continuously.
| Grade | Chemical Composition % | |||
| Si Content(%) | Impurities(%) | |||
| Fe | Al | Ca | ||
| Silicon Metal 2202 | 99.58 | 0.2 | 0.2 | 0.02 |
| Silicon Metal 3303 | 99.37 | 0.3 | 0.3 | 0.03 |
| Silicon Metal 411 | 99.4 | 0.4 | 0.4 | 0.1 |
| Silicon Metal 421 | 99.3 | 0.4 | 0.2 | 0.1 |
| Silicon Metal 441 | 99.1 | 0.4 | 0.4 | 0.1 |
| Silicon Metal 551 | 98.9 | 0.5 | 0.5 | 0.1 |
| Silicon Metal 553 | 98.7 | 0.5 | 0.5 | 0.3 |
| Other chemical composition and size can be supplied upon request. | ||||
2) The current is connected to the electrode to heat the material in the condensed shell to a high temperature of more than 1800 degrees Celsius. Silicon is reduced in the condensed shell and is in liquid state. It is released through the silicon outlet and cast into silicon ingots. After crushing, it is packaged according to the size required by the customer.
3) The bottom blowing method is adopted, oxygen and air are mixed, and bottom blowing oxygen permeable bricks are installed at the bottom of the bag. There are many thin copper tubes in the permeable bricks. Oxygen and air are blown into the silicon melt by the thin copper tubes for refining. After blowing oxygen, air also enters the silicon melt through the permeable bricks to form positive pressure. Stirring is required during the refining process, and the stirring is carried out by compressed air. The purpose is to improve the kinetic conditions of the slag-metal phase reaction, accelerate slag formation, remove impurities as soon as possible, and reduce heat loss and silicon liquid adhesion.
The above is the production process of metal silicon 441. I hope the above sharing will be helpful to everyone. If you have any questions about metal silicon 441 in the future, you can leave us a message on the website in time or call +8615896822096.
