Introduction of Silicon Aluminum Alloy:

Silicon metal is a product smelted from silica and carbonaceous reducing agent in a submerged arc furnace. The main component of silicon is about 98% (in recent years, 99.99% Si content is also listed in it), and the remaining impurities is iron, aluminum, calcium, etc. Due to its different uses, silicon metal can be divided into multiple specifications. According to the content of iron, aluminum and calcium in the metalloid silicon, the metalloid silicon can be divided into different grades of 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501 and 1101, etc.

Parameters:

ITEM	CHEMICAL COMPOSITION %
	Si	IMPURITY
		Fe	Al	Ca
	Min	Max
Si 553	98.70	0.50	0.50	0.30
Si 521	99.20	0.50	0.20	0.10
Si 441	99.10	0.40	0.40	0.10
Si 421	99.30	0.40	0.20	0.10
Si 411	99.40	0.40	0.10	0.10
Si 3303	99.37	0.30	0.30	0.03
Si 2202	99.58	0.20	0.20	0.02
Si 1101	99.79	0.10	0.10	0.01

Application:

1. Aluminum alloy industry.
Silicon aluminum alloy is a silicon alloy that has the largest demand for silicon metal. Si-Al alloy is a strong compound deoxidizer, as a substitute of pure aluminum in steel making process, it can improve the utilization rate of deoxidizer, purify the molten steel and improve the quality of steel. Aluminum using in automobile and other industries has a very large demand for silicon metal, so the development of a region or a country's automobile industry has a direct impact on the rise and fall of silicon metal market.

2. Additive for non-ferrous alloys.
Silicon metal is also used as an alloying agent for silicon steel that has strict requirement, and deoxidizer for smelting special steel and non-ferrous alloy.

3. Photovoltaic and electronics industry.
Silicon metal turns into polycrystalline silicon and monocrystalline silicon after a series of processes of purifying, which can be used in photovoltaic and electronics industry. Crystal silicon cell is mainly used in solar rooftop power stations, commercial power stations and urban power stations that have high land cost, they are currently the most mature and widely used solar photovoltaic products, occupying more than 80% of the photovoltaic market in the world, and their demand for silicon metal grows fast significantly. Modern large integrated circuits are mostly made of high purity quasi silicon metal which is also the main raw material for the production of optical fiber, silicon metal has become the basic pillar industry in the information era.