Ferrosilicon 65 manufacturing process

Raw materials for the production of Fesi 65: coke, iron ore, silica.

The ferrosilicon 65 manufacturing process requires raw materials: the purity of silica SiO₂ is above 97.5%. The surface is free of sand, dust or other impurities.

The size range is between 80 and 140 mm.

The fixed carbon of coke is not less than 82%, the particle size is 8-18 mm, the moisture is less than 16%, the volatile matter is less than 8%, and the ash content is less than 8%.

The main chemical equation of the ferrosilicon 65% manufacturing process is SiO2+C=Si+CO.

The entire reaction process includes four parts

1. Disproportionation reaction of SiO.

2. The form of silicon carbide.

3. Chemical decomposition of silicon carbide, molecular formula SiO2(L)+2SiC(S)=3Si(L)+2CO(g).

4. Liquid CO2 reacts with SiC to generate silicon, SiO₂ gas, and CO gas. The formula is 3SiO2(L)+2SiC(S)=Si(L)+2CO(g)+4SiO(g).

The main equipment of the Fesi65 manufacturing process is electric arc furnace.

Si content should be adjusted according to the amount of raw materials added. After the conventional manufacturing process is completed, another process is often required. That’s refining. Used to remove harmful elements such as aluminum, calcium, and carbon.

Advantages of ferrosilicon 65

• Ferrosilicon 65 has significant deoxidation: Ferrosilicon 65 contains a certain amount of silicon element. Adding ferrosilicon 65 during the steelmaking process can effectively react with the oxygen in the molten steel to achieve a deoxidation effect. Compared with traditional The deoxidation method is more effective and greatly saves the time and labor resources consumed in deoxidation of steel.
• Ferrosilicon 65 purifies molten steel: In the actual steelmaking process, many oxides are often seen floating on the surface of the molten steel. If not cleaned, it will greatly affect the quality of the steel. Adding ferrosilicon 65 during the steelmaking process can effectively To solve this problem, the elements in ferrosilicon 65 melted in the molten steel can react with the oxides to gather a large amount of oxides, which makes it easier to filter and purify the molten steel and improve the quality of the finished steel.
• Ferrosilicon 65 increases furnace temperature: Adding ferrosilicon 65 during the steelmaking process can effectively increase the temperature of the steelmaking furnace, making the alloy conversion more complete and greatly increasing the yield.