Silicon Metal 98.5 refers to silicon metal with a silicon purity of more than 98.5%. Among conventional Si metal models, Silicon 553 generally meets this requirement. In other words, silicon metal 98.5 is usually silicon metal 553.
According to the requirements, the content of Silicon metal 553 is that the iron content is no more than 0.5%, the aluminum content is no more than 0.5%, and the calcium content is no more than 0.3%. In terms of content, the silicon content in metallic silicon should be up to 98.5%.
Silicon metal is produced in a metal silicon submersible furnace using silica as raw material and petroleum coke and charcoal as reducing agents. The main component of silica is silicon dioxide. It exists in two forms in nature, namely amorphous form and crystalline form. Crystalline forms mainly occur in nature as simple oxides. It has extensive distribution branches.
The silica as material to smelt silicon metal 98.5 is also the raw material to produce ferro silicon. At the same time, both use submersible arc furnaces for production. The difference is that silicon metal has higher purity, while ferrosilicon has a Si content of less than 90%. The biggest use of Silicon metal is aluminum alloy, so the lower the iron content, the better.
Application of Silicon 98.5
Metal silicon 98.5 has a wide application in many industrial fields, such as:
Steel metallurgy: Metallic silicon 98.5 is a deoxidizer and alloying element in steel smelting to improve the quality and performance of steel. However, its cost is relatively high and it is generally only for the special steel grades.
Aluminum alloy casting industry: Metal silicon 98.5 is a good additive in the aluminum alloy casting process to improve the strength and toughness of castings. It is a good material for producing aluminum alloy ingots. This is also the largest use route for metallurgical grade silicon metal.
In addition, after further purification, it can be used in the manufacture of semiconductor materials and electronic components, as well as high-tech products such as solar panels and optical fibers.