Ferro silicon is an alloy of iron and silicon, commonly used as a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys.
It is also used in the manufacturing of other ferroalloys and as a reductant in the production of magnesium metal.
FERRO SILICON (FeSi)
The most widely used Ferro silicon grade are 75% ferro silicon and 72% ferro silicon.
In the steelmaking industry, about 3-5 kg of 75% ferro silicon is consumed for every 1 ton of steel produced. Common particle sizes of ferro silicon are 0-3mm, 10-60mm, 10-100mm, etc.
| Grade | Si | Al | Ca | P | S | C |
|---|---|---|---|---|---|---|
| # 75 | 75 Min | ≤ 1.5 | ≤ 2.0 | ≤ 0.04 | ≤ 0.02 | ≤ 0.2 |
| # 72 | 72 Min | ≤ 2.0 | ≤ 2.0 | ≤ 0.04 | ≤ 0.02 | ≤ 0.2 |
| # 70 | 70 Min | ≤ 2.0 | ≤ 2.0 | ≤ 0.04 | ≤ 0.02 | ≤ 0.2 |
| # 65 | 65 Min | ≤ 2.0 | ≤ 2.0 | ≤ 0.04 | ≤ 0.02 | ≤ 0.2 |
SILICON METAL
Silicon metal is smelted by reducing silicon from silicon dioxide using carbides such as petroleum coke or semi-coke as a reducing agent. At present, China is the country that produces silicon in abundance, due to the natural advantages of raw materials, making China the main producer of silicon metal.
| Grade | Si | Fe | Al | Ca |
|---|---|---|---|---|
| # 553 | 98.5 min | 0.5 min | 0.5 min | ≤ 0.30 |
| # 441 | 99.0 min | 0.4 min | 0.4 min | ≤ 0.10 |
| # 421 | 99.0 min | 0.4 min | 0.2 min | ≤ 0.10 |
| # 3303 | 99.0 min | 0.3 min | 0.3 min | ≤ 0.03 |
| # 2202 | 99.0 min | 0.2 min | 0.2 min | ≤ 0.02 |
| # 1101 | 99.0 min | 0.1 min | 0.1 min | ≤ 0.01 |
| Off Grade | 96.0 min | 2.0 min | 1.0 min | ≤ 0.50 |
| Size | 1 - 10 mm | 3 - 8 mm | 10 - 50 mm | 10 - 100 mm |
| 200 mesh | 325 mesh |
SILICON CARBIDE
Silicon carbide is mainly through artificial smelting, whose raw materials are mainly quartz sand, petroleum coke, wood chips, etc. It can be used to raise tap temperatures and adjust the carbon and silicon content. Silicon carbide is cheaper than a combination of ferrosilicon and carbon, produces cleaner steel and lower emissions due to low levels of trace elements, has a low gas content, and does not lower the temperature of steel.
| Grade | Si | C | P | S |
|---|---|---|---|---|
| # 45 | 45 min | 15 | 0.5 | 0.05 |
| # 55 | 55 min | 15 | 0.5 | 0.05 |
| # 65 | 65 min | 15 | 0.5 | 0.05 |
| # 68 | 68 min | 18 | 0.5 | 0.05 |
| Size | 0 - 3mm | 0 - 10 mm | 3 - 8 mm | 10 - 60 mm |
| 10 - 70 mm | 10 - 100 mm |
THE ADVANTAGE
- Deoxidation
- Improved Carbon Control
- Enhanced Strength and Hardness
- Reduced Energy Consumption
- Increased Efficiency in Castings
- Cost-Effectiveness
HIGH CARBON SILICON
High Carbon Silicon is the by-product of Silicon metal. The main markets for high carbon silicon are steelmaking, foundry and aluminum industries.
In recent years, due to the rising cost of steelmaking and other industries, the demand for high carbon silicon has been rising each year. Compare with ferro silicon, manufacturers can save up to 30% of their costs and effectively improve product quality.
| Grade | Si | C | P | S | SiO2 |
|---|---|---|---|---|---|
| # 60/10 | 60 min | 10 min | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
| # 65/15 | 65 min | 15 min | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
| # 68/18 | 68 min | 18 min | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
| # 68/22 | 68 min | 22 min | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
| Size | 0 - 3mm | 1 - 3 mm | 1 - 10 mm | 10 - 50 mm | 10 - 100 mm |
THE ADVANTAGE
- Improve the quality of molten steel
- Reduce the amount of alloy added, reduce steelmaking costs, and increase economic benefits.
- Cost effective with stable quality
- Reduced Sulfur and Phosphorus
SILICON SLAG
Silicon slag is a by-product of silicon metal and ferro silicon, and the silicon content is about 45%~65%. Other than silicon, silicon slag also contains small amounts of aluminum, sulfur, phosphorus, and carbon. The price of silicon slag is significantly lower compare with standard ferro silicon.
| Grade | Si | Al | S | P | C |
|---|---|---|---|---|---|
| Slag # 45 | 45 min | ≤ 5.0 | ≤ 0.1 | ≤ 0.05 | ≤ 8.0 |
| Slag # 50 | 50 min | ≤ 5.0 | ≤ 0.1 | ≤ 0.05 | ≤ 8.0 |
| Slag # 55 | 55 min | ≤ 3.0 | ≤ 0.1 | ≤ 0.05 | ≤ 6.0 |
| Slag # 60 | 60 min | ≤ 5.0 | ≤ 0.1 | ≤ 0.05 | ≤ 6.0 |
| Slag # 65 | 65 min | ≤ 5.0 | ≤ 0.1 | ≤ 0.05 | ≤ 5.0 |
| Slag # 70 | 70 min | ≤ 3.0 | ≤ 0.1 | ≤ 0.05 | ≤ 3.5 |
| Size | 0 - 10 mm | 1 - 10 mm | 10 - 50 mm | 10 - 100 mm |
THE ADVANTAGE
- Deoxidation
- Slag Formation
- Energy Efficiency
- Environmental Benefits
- Cost effective with stable quality
- Able to customize
SILICON BRIQUETTE
The main raw material of briquettes is silicon slag, by using professional briquetting equipment grinding slag into powder form and adding alloy powders.
Depending on different raw materials and processing process, ferroalloy briquettes can be divided into silicon metal briquettes, ferrosilicon briquettes, high carbon silicon briquettes, etc.
| Grade | Si | C | P | S |
|---|---|---|---|---|
| SI Briquette # 45 | 45 min | ≤ 2.0 | ≤ 0.05 | ≤ 0.05 |
| SI Briquette # 50 | 50 min | ≤ 1.5 | ≤ 0.05 | ≤ 0.05 |
| SI Briquette # 65 | 65 min | ≤ 1.0 | ≤ 0.05 | ≤ 0.05 |
| SI Briquette # 70 | 70 min | ≤ 0.5 | ≤ 0.05 | ≤ 0.05 |
| Grade | Si | C | P | S | SiO2 |
|---|---|---|---|---|---|
| SIC Briquette # 45/15 | 45 min | ≤ 15 | ≤ 0.05 | ≤ 0.05 | ≤ 8.0 |
| SIC Briquette # 50/15 | 50 min | ≤ 15 | ≤ 0.05 | ≤ 0.05 | ≤ 5.0 |
| SIC Briquette # 65/15 | 65 min | ≤ 15 | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
| SIC Briquette # 67/18 | 67 min | ≤ 18 | ≤ 0.05 | ≤ 0.05 | ≤ 2.5 |
THE ADVANTAGE
- Cost effective with stable quality
- Environmental Benefits
- Energy saving
