What is Low Grade Silicon (Silicon Slag)? Low Grade Silicon Typical Chemical Composition. Low Grade Silicon Main Applications.

Custom grades available to meet your steelmaking or casting requirements.

Low Grade Silicon Main Applications

1. Steelmaking Industry

Silicon slag is widely used as a deoxidizer in the production of carbon steel and alloy steel. It helps to remove oxygen from molten steel, improving fluidity and reducing impurities.

Why choose silicon slag over ferrosilicon?

• Similar function at much lower cost
• Ideal for ladle refining or converter operations
• Especially useful in low-silicon steel grades

2. Foundry and Casting

In grey iron or malleable iron casting, silicon slag contributes to:

• Promoting graphite formation
• Enhancing surface quality of castings
• Improving iron flowability

It can be used alone or blended with ferrosilicon depending on specific metallurgy requirements.

3. Ferroalloy and Slag Conditioner

In silicon manganese or ferrochrome smelting, low-grade silicon is used to:

• Adjust silicon ratios in the alloy mix
• Act as a slag conditioner, improving slag viscosity and removing impurities

Why Use Low-Grade Silicon (Silicon Slag)?

1. Cost Savings

Compared with ferrosilicon (FeSi 75 or 72), silicon slag can cut raw material costs by 20–40%, especially in non-critical or secondary steel grades.

2. Functional Efficiency

Even with lower silicon content, it maintains sufficient metallurgical activity for deoxidation, especially in converter and ladle operations.

3. Sustainability

Silicon slag represents a responsible approach to waste recycling and resource optimization in the silicon industry. Its use supports circular economy goals.

4. Supply Availability

As a by-product, supply is consistent and available in large volumes, especially from China-based producers.