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Silicon slag (off grade silicon) is a by-product when making silicon metal.
The silicon content is from 45% to 95%, and the rest are C, S, P, Al, SiO2, Fe, Ca etc.
The silicon slag is much cheaper than purity silicon metal, and has many industrial applications.
Application:
1.It’s a good substitute for ferro silicon in steel making which has advantage in reducing the making cost.
2.The silicon slag powder can be made silicon briquette which has far and wide market at home and abroad.
3.It is used as deoxidizer in steel making.
Size:
0-3mm, 1-10mm, 10-50mm or as per customers’ requirement.
Chemical Composition:
Chemical Composition% | ||||||||||
Type | Si | Ca | S | P | C | |||||
≥ | ≤ | |||||||||
Silicon Slag 45 | 45 | 5 | 0.1 | 0.05 | 5 | |||||
Silicon Slag 50 | 50 | 5 | 0.1 | 0.05 | 5 | |||||
Silicon Slag 55 | 55 | 5 | 0.1 | 0.05 | 5 | |||||
Silicon Slag 60 | 60 | 4 | 0.1 | 0.05 | 5 | |||||
Silicon Slag 65 | 65 | 4 | 0.1 | 0.05 | 5 | |||||
Silicon Slag 70 | 70 | 3 | 0.1 | 0.05 | 3.5 | |||||
Off grade Silicon | ||||||||||
Type | Si | Ca | S | P | C | |||||
≥ | ≤ | |||||||||
Off grade Silicon 80 | 80 | 3 | 0.1 | 0.05 | 3.5 | |||||
Off grade Silicon 85 | 85 | 3 | 0.1 | 0.05 | 3.5 | |||||
Off grade Silicon 90 | 90 | 1.5 | 0.1 | 0.05 | 3.5 | |||||
Off grade Silicon 93 | 93 | 1.5 | 0.1 | 0.05 | 3.5 | |||||
Off grade Silicon powder | ||||||||||
Type | Si | C | Ca | S | P | |||||
≥ | ≤ | |||||||||
Off grade Silicon powder | 90 | 3 | 5 | 0.1 | 0.05 | |||||
Off grade Silicon powder | 80 | 3 | 5 | 0.1 | 0.05 | |||||
Off grade Silicon powder | 70 | 4 | 5 | 0.1 | 0.05 | |||||
Off grade Silicon powder | 65 | 5 | 5 | 0.1 | 0.05 | |||||
Off grade Silicon powder | 60 | 6 | 5 | 0.1 | 0.05 | |||||



1MT/bag or as the customer’s requirements
Within 15 days after receive the prepayment.
1.Specializing in metallurgical refractory products more than 20 years;
2.Stable supplying guarantees timely delivery;
3.Advanced production technology and equipment, inspection equipment;
4.Perfect quality assurance system, stable and reliable product quality;
5.Abundant financial resources;
6.Having independent import and export qualification;
Henan Xinxin Silicon Alloy Co.,Ltd, focus on silicon materials and nitride materials for more than 20 years,the factory has two sets of 13500KVA arc furnaces,three sets 500kg electric induction furnaces.Output:50000mts per year.
Our main products covers:FeSi,Inoculant,Nodulant,Pipe Mould Power,FeSi Briquette,Si Briquette,High Carbon Silicon/Silicon Carbon Alloy,Nitrided FeSi,Nitrided FeCr,Nitrided FeMn,Nitride Silicon,Nitrided Vanadium,Cored wire and steel products.
We export 3000MTS/Month to South Korea,Japan,India,Vietnam,Thailand,Turkey,Mexico etc,and our customers including POSCO,Hyundai,Nippon Steel,JFE,TATA steel,Xinxin Cathay etc.
Accredited with ISO 9001-2000,the company has always adhered to "good faith, innovation, mutual benefit and win-win" business philosophy,and we are looking forward to establish business relationship with you!
Learn more about our company from:fesialloy.com
It is high density, high purity and no pollution for the steel liquid, with the high recovery rate and stable effect, it can replace the ferrosilicon, SiC, Carburant, reduces the usage of deoxidizer, easily operate and well performance.
1. Used as deoxidizer in steel- making.
2.Widely used in low alloy steel, non-ferrous metal, bearing steel, heat-resistant steels and electrician silicon-steel.
3.Used as a reductant in ferroalloy(SiMn) production and chemical industry.
4. As inoculant and nodulizer In iron industry.
It is a necessary deoxidizer and alloying agent, can raise the temperature of furnace, increase the liquidity of molten iron, discharge effectively, and improve the toughness and cutting ability of cast iron and casting.

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