Product Introduction
Our industrial silicon byproduct (also referred to as Si-rich residue, silicon dross, or metallurgical Si coproduct) is a cost-effective alternative to pure silicon metal and standard ferrosilicon. Generated during the production of metallurgical-grade silicon, this material provides active silicon content at 30–50% lower cost, making it ideal for ladle deoxidation, temperature control, and silicon adjustment in steelmaking and cast iron production.
Chemical Composition of Silicon Slag
| Grade | Si Content | Al | Fe | Ca | C | Size Range |
|---|---|---|---|---|---|---|
| Standard | 45–50% min | ≤3% | ≤2% | ≤2% | ≤1.5% | 0–10mm / 10–50mm |
| Premium | 60–65% min | ≤2% | ≤1.5% | ≤1.5% | ≤1% | 0–10mm / 10–50mm |
| Fines Grade | 50–55% min | ≤2.5% | ≤1.8% | ≤1.8% | ≤1.2% | 0–3mm (for injection) |
Major Applications of Silicon Slag
1. Steelmaking Industry
This low-cost silicon material is widely used as an oxygen scavenger in ladle deoxidation, helping to remove excess oxygen from molten steel and improve final product quality. It also serves as an effective slag conditioner, adjusting the basicity and fluidity of steelmaking slag for better impurity absorption. In electric arc furnaces, this Si-rich residue assists in temperature control and bath regulation. Additionally, it provides a supplemental source of silicon for producing silicon-killed steel grades at a fraction of the cost of pure ferrosilicon.
2. Foundry Industry
In foundry operations, this industrial byproduct is used for cast iron inoculation, where it adds active silicon to gray or ductile iron to control graphite structure and enhance mechanical properties. It can replace a portion of standard ferrosilicon in ladle additions, offering significant cost savings without compromising performance.
3. Refractory Industry
This metallurgical silicon coproduct serves as an economical raw material for manufacturing low-cost refractory bricks and linings. It also helps improve slag corrosion resistance when incorporated into certain refractory formulations.
4. Silicon Recovery and Ferroalloy Production
For silicon metal plants, this residue can be recycled and re-smelted to recover additional silicon content. It is also used as a blending material, mixed with higher-grade ferrosilicon to adjust the final silicon percentage to meet customer specifications.
Ordering & Packaging
Packaging: 1 MT big bags, 25 kg multi-wall paper bags, or bulk container liners.
MOQ: 20 MT (one 20' container).
Lead time: 15–20 days after order confirmation.
Certification: ISO 9001:2024, with mill test certificates for each lot.
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