Calcium Silicon

Calcium Silicon Alloy (CaSi Alloy) is a compound alloy mainly composed of silicon, calcium and iron. It is an ideal deoxidizer and desulfurizer widely used in steelmaking, including the production of high-quality steel, low-carbon steel, stainless steel, and special alloys such as nickel-based alloys and titanium-based alloys.

Calcium silicon alloy can also be used as a heat-raising agent in converter steelmaking, as an inoculant in cast iron production, and as an additive in the production of nodular (ductile) cast iron.

Calcium silicon products are available in two forms: calcium silicon lump and calcium silicon powder.

Calcium silicon lump usually refers to the CaSi 60/30 grade, Size: 10-100mm, 10-80mm, 10-50mm, which is widely used in steelmaking and foundry applications.

Calcium silicon powder is commonly available in several grades, including:

CaSi 60/30 Powder

CaSi 55/28 Powder

CaSi 50/28 Powder

These products are widely used as deoxidizing and desulfurizing materials in steelmaking and as raw materials for calcium silicon cored wire production.

■ Stable reaction and easy operation

■ Uniform chemical composition and low impurities with high performance

■ Products can meet the needs of most customers with varied specifications.

Deoxidizer for Steelmaking

Calcium silicon is widely used as a deoxidizer in steelmaking. Both silicon (Si) and calcium (Ca) are strong deoxidizing elements that effectively remove oxygen from molten steel. This helps improve the cleanliness of the steel, reduce non-metallic inclusions, and enhance the overall quality of steel products.

 Desulfurizing Agent for Steelmaking

Calcium silicon also acts as an effective desulfurizing agent in the steelmaking process. Calcium reacts with sulfur to form calcium sulfide (CaS), which helps reduce sulfur content in molten steel and improves the mechanical properties and performance of the final steel products.

Raw Material for Calcium Silicon Cored Wire

Calcium silicon powder with a particle size of 0–3 mm is widely used as the filling material for calcium silicon cored wire. The powder is wrapped in a low-carbon steel strip through a rolling process and formed into wire coils. The weight is approximately 1-2 tons per coil.

During steelmaking, calcium silicon cored wire is injected into molten steel to serve as a deoxidizing and desulfurizing agent. This method allows for more accurate and controlled addition of calcium and silicon, which improves refining efficiency. For this reason, an increasing number of steel plants prefer using calcium silicon cored wire.

Foundry Industry

In the cast iron industry, calcium silicon is used to improve graphite structure and promote better graphite formation. This helps enhance the mechanical properties of cast iron and improves the overall quality of castings.

Quality Assurance

The price of calcium silicon alloy (CaSi alloy) may vary depending on factors such as raw material costs, order quantity, particle size, and packaging requirements.

For reference, the approximate FOB Tianjin Port prices are as follows:

CaSi 60/30 (Calcium Silicon 6030): about USD 1340–1420 / MT FOB Tianjin

CaSi 58/28 (Calcium Silicon 5828): about USD 1330–1410 / MT FOB Tianjin

Please note that calcium silicon alloy prices are subject to market fluctuations, and the final price will depend on the specific product specifications, particle size, order quantity, and packaging requirements.

For the latest price and detailed quotation, please feel free to contact us with your required specifications. We will provide a prompt and competitive offer.