Products Description
3303 Metallic silicon: Industrial silicon, also known as quasi-metallic silicon, is a trade name that appeared in the mid-1960s. Silicon metal is made of silica and carbon reducing agent in the ore furnace smelting products, the content of the main component silicon element is about 98% (in recent years, the content of si 99.99% is also listed in silicon metal), the remaining impurities are iron, aluminum, calcium and so on.
Industrial silicon material is a very important intermediate product in the silicon product chain, is the main raw material for manufacturing silicon polishing, solar cells and high-purity silicon products, is the information industry and new energy industry the most basic raw materials, it can also be said that 3303 metal silicon has become the basic pillar industry in the information age.
manufacture craft
The method of 3303 metal silicon refining outside the furnace solves the problem of low heat utilization and low purity of industrial silicon produced.
Include the following steps:
Step 1: During the release of silicon melt, the refining gas is continuously injected into the ladle, and then the silicon melt in the ore furnace is released into the ladle, and the silicon water in the ladle is heated and kept warm for the first time.
Step 2: After the initial temperature rise, add refining agent to the ladle, blow gas outside the furnace, slag refining;
Step 3: Reheat and keep warm the remaining silicon water in the ladle;
Step 4: After heating up again, adjust the flow rate of refining gas into the ladle, and then add refining agent to the ladle for blowing outside the furnace and slagging refining;
Step 5: After the refining in the furnace is completed, the slag silicon is separated and then poured, that is, the high-purity 3303 metallic silicon is obtained.
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