off grade silicon metal

Silicon is a very commonplace element in earth that widely exists in rock, sand and earth. It is the second richest element in the earth's crust. For its high melting point, good heat resistance, high resistivity and superior oxidation resistance, it's widely used in modern industry as know by people as the "industrial glutamate"
But it's mainly exist by the form of silicon dioxide or silicate. It can be extract into elementary substance, which we can Silicon Metal. Processed by electronic arc furnace from materials of clays, silica sand and stone.It is silver gray or dark gray powder with metallic luster. Can be used in semi-conductor,  metal ceramic, metallurgy, solar industries. Silicon metal includes several models by different purity from 98% to 99.9% or even higher. Among those models, silicon metal below 99.5% are usually used in metallurgical industry, such like aluminum alloy. Besides those conventional models, there is also off grade silicon metal which purity lower than common ones.

Off grade silicon metal like its name means, is unqualified metallurgical si metal. Silicon content used to be 93% min but recent years with advanced production technique, the purity of off grade silicon metal became higher than 96%, 97%. Because it’s relative high purity and surprising cheap price. It is very suitable to replace model Si 553 in some area. In some Aluminum Alloy model, only small quantity of silicon is needed. And some model didn’t require very strict Silicon or Fe, Ca content. So off grade silicon is very good substitute and very efficiency material to save cost . Off grade silicon is also known as Low Grade Silicon Metal, Silicon Metal Slag, Silicon Metal Dross, It can be used as:
1. Dioxidizer in steelmaking as replacement of ferrosilicon or high purity silicon metal.
2. Aluminum alloy ingot production, as additive of silicon.
3. Materials of silicon briquette.
4. Other replacement of higher grade silicon metal, metallurgical, chemical or other industries, with its much cheaper price.

Model Chemical Composition
Si Fe Al Ca
Off-Grade Silicon Metal 96.0 min. 2.0 max 1.0 max 1.0 max
Size: 10 – 100mm (90%min) or as request