Model No.	Chemical Composition (%)
	Si	Fe	Al	Ca
	≥	≤
Si-1101	99.79	0.1	0.1	0.01
Si-2202	99.58	0.2	0.2	0.02
Si-3303	99.37	0.3	0.3	0.03
Si-411	99.4	0.4	0.1	0.1
Si-441	99.1	0.4	0.4	0.1
Si-551	98.7	0.5	0.5	0.1
Si-553	98.5	0.5	0.5	0.3
Off-Grade	97.0	2.5/1.8/1.5	/	0.5/0.3

Silicon Metal Si Metal Lumps is a very common element on earth, and it is very active with oxygen. Silicon is a grey metallically lustrous metalloid element,  the pure silicon is produced by electric furncae from quartz ore and coke, also known as silicon metal. Generally , the purity of silicon metal is above 98% and it have alternative names as metal silicon or industrial silicon. Meanwhile， the impurities are mainly iron, aluminum and caclium. So the main application of it is as non-ferrous alloy’s additive.

Silicon metal is a widely-used deoxidizer in metallurgy like aluminum alloy and production of poly-silicon, single crystal silicon. And, it is also a material of semiconductor, heat-resisting material, light-guide fibre, organosilicone, etc. In addition, silicon products is extensively used in aerospace, electronics, architecture, transportation, energy, chemical, textile, food, medical, agriculture and many other industries.  

Applications:

1. In aluminum alloy production it can increase the fluidity of the high-temperature metal liquid and decrease the shrinking and hot-cracking tendency.
2. It is useful in the production of organic silicon chemicals, such as silicone oils, silicone rubber, light-guide fibre. Moreover, Silicon helps to increase the the heat resistance, electrical insulation, corrosion resistance of the products.
3. Silicon is a very good deoxidizer in steel-making and casting industry, so silicon metal is an alloying agent in many ferroalloys such as FeSi, SiMn, SiCa, etc.