Silicon Slag: Uses, Specifications, Price & Reliable Supplier – Zhenxin Metallurgy

Silicon slag is a by-product of metallic silicon smelting, characterized by high silicon and high carbon content. Its main components are silicon dioxide (SiO₂) and carbon (C), with a small amount of metal impurities. As a cost-effective industrial material, it has been widely used in multiple fields, especially in the metallurgical industry.

Silicon Slag Chemical Content & Specifications

Can Silicon Slag Replace Metallic Silicon?

No, silicon slag cannot directly replace metallic silicon. A foundry experiment showed that replacing 30% of metallic silicon with silicon slag in aluminum alloy production led to porosity defects in castings and an 18% drop in yield, mainly due to the high carbon content of silicon slag.

Main Application Areas of Silicon Slag

Key Characteristics of Silicon Slag

1. High Carbon Content: Residual carbon combines with silicon oxide due to excessive coke used in smelting.
2. Porous Structure: Forms loose particles after cooling, prone to moisture absorption.
3. Potential Self-Ignition: Carbon oxidizes slowly in air, generating heat and possibly self-igniting when piled.

Silicon Slag Production Process

Silicon slag is the waste residue after metallic silicon production. During smelting, raw materials like silica and petroleum coke react in furnaces to produce metallic silicon; unreacted substances and impurities form silicon slag. It is processed into particles, blocks, or balls based on customer particle size requirements.

Silicon Slag Price

Silicon slag is a cost-effective alternative to ferrosilicon, with a much lower price. For products with low hardness requirements, using silicon slag reduces production costs significantly. In China’s Tianjin market, the average price is around US$500 per ton, varying by silicon and iron content.

Why Choose Zhenxin Metallurgy Silicon Slag?

1. Free Samples (≈1kg), buyers cover postage.
2. Factory Direct Sales: Competitive pricing.
3. Reliable Credibility: Rich export experience and SGS certification.
4. Fast Delivery: Production completed in 7-15 days.
5. Flexible Payment: T/T and L/C accepted.