What is 553 Silicon Metal

553 Silicon Metal is a high-purity silicon product smelted in a submerged arc furnace using high-purity quartz and a carbonaceous reducing agent. It is suitable for the aluminum alloy, silicone, foundry, and electronics industries.

Product Specification

Grade	Chemical Compositions (%)
	Si	Fe	Al	Ca
	≥(Min)	≤(Max)
553	98.5	0.5	0.5	0.3
441	99.0	0.4	0.4	0.1
421	99.0	0.4	0.2	0.1
3303	99.0	0.3	0.3	0.03
2202	99.0	0.2	0.2	0.0

Product Features

Materials and Processing
553 silicon metal is made from over 98.5% high-purity quartz and anthracite through reduction smelting in a submerged arc furnace. The total impurity content (Fe+Al+Ca) is ≤1.3%, and its composition is stable.

Shape and Appearance
The product has a silver-gray metallic luster, a solid and dense block without pulverization, closely packed grains, and a uniform appearance.

High-Temperature Durability
With a melting point of up to 1414°C, it remains resistant to cracking or deformation in high-temperature smelting environments, extending its service life by approximately 30% compared to ordinary silicon.

Product Application

In Aluminum Alloy Manufacturing
553 silicon metal is used to enhance the strength and corrosion resistance of aluminum alloys, as well as to improve fluidity and casting performance. It is widely applied in automotive lightweighting and aerospace structural components.

In Organosilicon Chemical Production
It serves as a primary raw material for producing organosilicon monomers. It reacts with chloromethane to form siloxanes, which are used in the manufacture of silicone rubber, silicone oil, and silicone resins.

In Solar Energy And Electronic Materials
After purification, 553 silicon metal can be refined into high-purity silicon for use in solar cells and wafer production, making it an essential raw material in the photovoltaic industry.

In Metallurgical Deoxidation
It acts as a strong deoxidizer in steelmaking, effectively removing oxygen impurities and improving the purity and mechanical properties of steel.

In Chemical Reduction And Material Preparation
553 silicon metal is often used as a reducing agent for producing silicon carbide, specialty metals, and ceramic materials, providing a highly reactive silicon source.