China Ferro Silicon 72% Suppliers - Ferro Silicon Lump 10-50mm Raw Materials from Reliable Factory for Steel Production
Product introduction
(1) Steelmaking Industry
Used as a deoxidizer and alloying agent in the steelmaking industry. In order to obtain steel with qualified chemical composition and ensure its quality, deoxidation must be carried out in the final stage of steelmaking. The chemical affinity between silicon and oxygen is high, so ferrosilicon is a strong deoxidizer for precipitation and diffusion deoxidation in steelmaking. Adding a certain amount of silicon to steel can significantly improve its strength, hardness, and elasticity.
In addition, in the steelmaking industry, silicon iron powder is often used as a heating agent for steel ingot caps to improve the quality and recovery rate of steel ingots due to its ability to release a large amount of heat at high temperatures.
(2) Cast Iron Industry
Used as an inoculant and spheroidizer in the cast iron industry. Cast iron is an important metal material in modern industry. It is cheaper than steel, easier to melt and smelt, and has excellent casting performance and much better seismic resistance than steel. Especially ductile iron, its mechanical properties reach or approach those of steel. Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in iron, promote the precipitation and spheroidization of graphite. Therefore, in the production of ductile iron, ferrosilicon is an important inoculant (helping to precipitate graphite) and spheroidizing agent.
(3) Ferroalloy Production
Used as a reducing agent in the production of ferroalloys. Not only is there a high chemical affinity between silicon and oxygen, but the carbon content of high silicon ferrosilicon is also very low. Therefore, high silicon ferrosilicon (or silicon alloy) is a commonly used reducing agent in the production of low-carbon ferroalloys in the ferroalloy industry.
(4) Magnesium Smelting
75# ferrosilicon is commonly used in the high-temperature smelting process of magnesium metal in the Pidgeon process, where CaO is added replacing magnesium in MgO. It consumes about 1.2 tons of ferrosilicon for every ton of metallic magnesium produced, which plays a significant role in the production of metallic magnesium.
Among these applications, the steelmaking industry, foundry industry, and ferroalloy industry are the largest users of ferrosilicon. They consume over 90% of silicon iron together. Among various grades of ferrosilicon, 75% ferrosilicon is currently the most widely used. In the steelmaking industry, approximately 3-5 kg of 75% silicon iron is consumed for every 1 ton of steel produced.
Frequently Asked Questions
Q: What are the primary applications of ferrosilicon?
Ferrosilicon is mainly used as a deoxidizer and alloying agent in steelmaking, an inoculant and spheroidizer in the cast iron industry, and a reducing agent in ferroalloy production and the chemical industry.
Q: How does ferrosilicon improve the quality of steel?
By acting as a strong deoxidizer to remove oxygen during steelmaking, and by adding silicon as an alloying element, which significantly improves the strength, hardness, and elasticity of the steel.
Q: Why is ferrosilicon important in the cast iron industry?
It serves as an inoculant and spheroidizer, which prevents the formation of carbides in iron and promotes the precipitation and spheroidization of graphite, crucial for producing high-quality ductile iron.
Q: Why is high silicon ferrosilicon used as a reducing agent in ferroalloys?
High silicon ferrosilicon is used because of the high chemical affinity between silicon and oxygen, combined with its extremely low carbon content, making it ideal for producing low-carbon ferroalloys.
Q: How much ferrosilicon is consumed in magnesium smelting and steelmaking?
In the Pidgeon process for magnesium smelting, about 1.2 tons of ferrosilicon are consumed for every ton of magnesium produced. In steelmaking, about 3-5 kg of 75% ferrosilicon is consumed per ton of steel.