Silicon Slag

Silicon Slag

We produce silicon slag at our smelting facility as a co-product of silicon metal and ferrosilicon production. Instead of treating it as waste, we process it into a cost-effective deoxidizer for the steel industry. Our slag typically contains 45-65% silicon in various compound forms, making it a practical alternative to fresh ferrosilicon for many steelmaking applications.

We grade it by silicon content and particle size:

SS45 is our entry-level grade for basic carbon steel deoxidation where cost is the primary concern. It gets the job done without the premium you would pay for higher-grade materials. SS55 offers a balanced silicon content that works well for medium-carbon and low-alloy steel production. SS65 comes closest to ferrosilicon in performance and is what we typically recommend for quality steel grades where consistent results matter most.

After the slag separates from the molten metal by density difference, we crush it, remove iron particles through magnetic separation, and screen it to the required size range. Every batch goes through XRF analysis, and we issue a Certificate of Analysis with each shipment.

Its main use is as a deoxidizer in EAF and BOF steelmaking. The exothermic reaction helps maintain bath temperature while it removes oxygen, which gives it an advantage over some alternatives. It also works well in ladle refining as a partial replacement for ferrosilicon, helping mills manage raw material costs without compromising on steel quality.

Packaged in 1-ton woven bags with plastic lining, or we can arrange bulk shipments. Standard lead time is 7-15 days from order confirmation. If you want to test a trial lot in your process or need a detailed spec sheet, our team can get that sorted for you.

Product Description

Silicon slag is a valuable byproduct produced during the smelting of silicon metal. It contains significant silicon content (35-65%) and is widely used in the steel industry as a deoxidizer and temperature raiser. Silicon slag is also used as raw material for producing silicon compounds and refractory materials.

Technical Specifications

Key Features

• Effective deoxidizing agent for steelmaking at competitive prices
• Excellent temperature raising effect during steelmaking process
• Cost-effective alternative to ferrosilicon and silicon metal
• Good slag fluidity improvement in steelmaking
• Stable chemical composition with consistent quality

Packaging

• 1 ton woven bags with inner plastic lining
• Bulk shipment available
• Custom packaging upon request

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