Ferrosilicon slag is the waste slag produced after ferrosilicon production. The main components of ferrosilicon slag are silicon dioxide, about 40%-60%, calcium oxide, about 20%-30%, aluminum oxide about 5%-10%, and a small amount of iron, manganese and other impurities.
Ferrosilicon slag can be used as a raw material and deoxidizer for steelmaking. In the manufacture of some steel products that do not require high silicon content, ferrosilicon slag can reduce costs and has a similar deoxidation effect like ferrosilicon, thereby improving the quality of steel.
Ferro Silicon Slag Specification and chemical content
| Ferro Silicon Slag Specification | |||||
| Grade | Chemical Composition(S) | ||||
| Si | Fe | C | S | P | |
| > | ≤ | ||||
| 60%FeSi Slag | 60-63 | 15-17 | 4.0 | 0.05 | 0.05 |
| 65%FeSi Slag | 65 | 15-17 | 4.0 | 0.05 | 0.05 |
| 70%FeSi Slag | 70 | Balance | 4.0 | 0.05 | 0.05 |
How to distinguish the silicon slag and ferrosilicon slag
silicon slag is silicon metal slag, it is the waste slag produced after silicon metal production, Usually, the silicon content of silicon slag is about 50% to 70%. When the silicon content of silicon slag is about 50%, it can be used for casting and steelmaking industries for deoxidation, which can reduce production costs and improve production efficiency.
Ferrosilicon slag is mainly produced by producing the ferrosilicon alloy, after the ferrosilicon is produced , the slag is discharged and then cooled to make the slag cool down and solidify to form ferrosilicon slag. Then we crushed them into different particle sizes according to customer needs
Uses of ferrosilicon slag
- As a byproduct of ferrosilicon alloy, ferrosilicon slag can not only replace ferrosilicon to reduce the production cost of steel, but also play an important role in the cement industry, agricultural field and ceramic production.
- Metallurgical industry. Ferrosilicon slag can be used as an auxiliary raw material for ironmaking to reduce production costs. And ferrosilicon slag can also replace ferrosilicon and play a deoxidation role in steelmaking.
- Construction industry. Ferrosilicon slag can produce cement and can be used as an admixture for concrete.
- Ceramic production. Ferrosilicon slag can be used as a raw material or additive in ceramic production to improve performance and quality and reduce costs.
Price of ferrosilicon slag
The price of ferrosilicon slag is usually much lower than that of ferrosilicon, which is mainly affected by the market of ferrosilicon. On December 17, 2024, the price of ferrosilicon 75 was between 5,900 yuan per ton and 6,000 yuan per ton. The price of silicon slag varies from tens to hundreds of yuan per ton according to different contents and qualities.
Why choose ferrosilicon slag from Zhenxin Metallurgy
- Price advantage. As a manufacturer of ferrosilicon, Zhenxin Metallurgy has low by-product costs and competitive prices.
- Customized particle size. Zhenxin Metallurgy’s ferrosilicon slag can be customized free of charge according to customer needs, such as 0-50mm, 50mm-100mm.
- Test report. As a large ferroalloy supplier in China, Zhenxin Metallurgy can provide free SGS testing
- Free samples. Free supply of ferrosilicon slag samples, about 50 kg.
- Flexible payment methods. T/T, L/C, etc. can be supported.