Zhenxin Silicon Slag: Specifications, Applications, Price & Trusted Supplier

As a by-product generated during metallic silicon smelting, silicon slag boasts high silicon and carbon contents as its primary features. Composed mainly of silicon dioxide (SiO₂) and carbon (C), with trace amounts of metallic impurities, it serves as a cost-saving industrial material widely adopted across various sectors, particularly in metallurgy.

Chemical Composition & Specifications of Silicon Slag

Is Silicon Slag a Substitute for Metallic Silicon?

Unfortunately, silicon slag cannot be directly used as a replacement for metallic silicon. A practical test in a foundry revealed that substituting 30% of metallic silicon with silicon slag in aluminum alloy manufacturing caused porosity issues in the castings, resulting in an 18% reduction in yield. This problem is primarily attributed to the high carbon content in silicon slag.

Key Application Fields of Silicon Slag

Core Traits of Silicon Slag

1. High Carbon Content: Excessive coke used in the smelting process leads to residual carbon combining with silicon oxide.
2. Porous Structure: It forms loose particles after cooling, making it susceptible to moisture absorption.
3. Potential Spontaneous Combustion: Carbon undergoes slow oxidation when exposed to air, releasing heat that may cause spontaneous combustion in piles.

Production Process of Silicon Slag

Silicon slag is the residual waste after metallic silicon production. During the smelting of metallic silicon, raw materials such as silica and petroleum coke are fed into smelting furnaces for reaction to produce metallic silicon, while unreacted materials and impurities form silicon slag. Based on customers’ particle size requirements, silicon slag is processed into particles, blocks, or balls.

Pricing of Silicon Slag

As an economical alternative to ferrosilicon, silicon slag is priced much lower. For products that do not require high hardness, using silicon slag can significantly reduce production costs and improve economic benefits. In China’s Tianjin market, the average price of silicon slag is approximately US$500 per ton, with variations depending on silicon and iron contents.

Why Choose Silicon Slag from Zhenxin Metallurgy?

1. Free Samples (about 1kg), with postage borne by the buyer.
2. Factory-Direct Supply: Offers competitive pricing with no middlemen.
3. Reliable Reputation: Boasts rich export experience and products certified by SGS.
4. Prompt Delivery: Production is generally completed within 7-15 days.
5. Flexible Payment Terms: Accepts T/T and L/C payments.