Metallic silicon (Si) is an industrial purified elemental silicon, mainly used for the production of organic silicon, the production of high-purity semiconductor materials, and the preparation of alloys with special purposes.

(1) Production of silicone rubber, silicone resin, silicone oil and other organic silicon

Silicone rubber has good elasticity and high temperature resistance, and is used to make medical supplies, high-temperature resistant gaskets, etc.

Silicone resin is used in the production of insulation paint, high-temperature coatings, etc.

Silicone oil is an oily substance whose viscosity is minimally affected by temperature. It is used in the production of advanced lubricants, polishes, fluid springs, dielectric liquids, etc. It can also be processed into a colorless and transparent liquid, which can be sprayed on building surfaces as an advanced waterproofing agent.

(2) Manufacturing high-purity semiconductors

Almost all modern large-scale integrated circuits are made of high-purity metal silicon, which is also the main raw material for producing optical fibers. It can be said that metal silicon has become the fundamental pillar industry of the information age.

(3) Prepare alloy

Silicon aluminum alloy is a silicon alloy with a large usage. Silicon aluminum alloy is a strong composite deoxidizer that can replace pure aluminum in steelmaking processes to improve the utilization rate of deoxidizers, purify molten steel, and improve steel quality. Silicon aluminum alloy has low density, low thermal expansion coefficient, good casting performance and wear resistance. The alloy castings cast with it have high impact resistance and good high-pressure density, which can greatly improve the service life. It is commonly used in the production of aerospace and automotive parts.

Silicon copper alloy has good welding performance and is not prone to sparking when subjected to impact. It has explosion-proof function and can be used to make storage tanks.

Adding silicon to steel to make silicon steel sheets can greatly improve the magnetic conductivity of steel, reduce hysteresis and eddy current losses, and can be used to manufacture iron cores for transformers and motors, improving their performance.