metallurgical grade silicon metal

Silicon is a chemical element whose chemical symbol is Si. It is an extremely common element, accounting for 26.4% in the earth's crust, second only to oxygen 49.4%. However, silicon rarely appears as a simple substance in nature, but in the form of complex silicate or silica, which is widely found in rocks, gravel, and dust.
Metal silicon, also known as crystalline silicon or industrial silicon, is mainly used as an additive to non-ferrous based alloys. The content of the main component silicon element is about 98%, and the remaining impurities are iron, aluminum, calcium, and the like.

Metal silicon is a product smelted from quartz and coke in an electric furnace. The reaction equation is
(Silica/quartz) SiO2 + (Coke/Petroleum Coke/Charcoal) 2C → (Metal Silicon) Si + (Carbon Monoxide) 2CO

Metal silicon is widely used for metallurgical deoxidation, aluminum alloy, and polysilicon and single crystal silicon. It is also used to make high-purity semiconductors, high temperature resistant materials, optical fiber communication materials, and organosilicon compounds. It is widely used in aerospace, electrical and electronics, construction, transportation, energy, chemical, textile, food, light industry, medical, agriculture, etc. industries.

Model No. Chemical Composition %
Si ≥ Impurity ≤
  Fe Al Ca
Silicon Metal 1101 99.7 0.1 0.1 0.01
Silicon Metal 2202 99.5 0.2 0.2 0.02
Silicon Metal 3303 99.3 0.3 0.3 0.03
Silicon Metal 441 99.0 0.4 0.4 0.1
Silicon Metal 421 99.0 0.4 0.2 0.1
Silicon Metal 553 99.0 0.4 0.1 0.1
Off-Grade Silicon Metal 96.0 2.0 1.0 1.0

Chemical silicon refers to industrial silicon used for chemical processing, such as silicone, and metallurgical silicon refers to industrial silicon used for metallurgical preparation of various alloys such as aluminum silicon.
Among them, the external silicon such as 553/441/3303/2202/1101/ and off grade silicon metal are metallurgical grade metal silicon. 521/5203/421/411 is a chemical grade metal silicon.