The use of Ferrosilicon
2019-05-09
The use of Ferrosilicon
(1) ferrosilicon used as Deoxidizer and alloying agent in the steelmaking industry. In order to obtain the chemical composition of qualified steel and ensure the quality of steel, in the final stage of steelmaking must be deoxygenation, silicon and oxygen between the chemical affinity is very large, so ferrosilicon is steelmaking strong deoxidizer for precipitation and diffusion deoxygenation. Adding a certain amount of silicon to the steel can significantly improve the strength, hardness and elasticity of the steel, so in the smelting structural steel (including Silicon 0.40-1.75%), tool steel (including SiO.30-1.8%), spring steel (including SiO.40-2.8%) and silicon steel (including silicon 2.81-4.8%) for Transformers, Ferrosilicon is also used as an alloying agent. At the same time, improving the morphology of inclusions and reducing the content of gas elements in molten steel is an effective new technology to improve steel quality, reduce cost and save iron.
Especially suitable for the deoxygenation requirements of continuous casting steel, it has been proved that Ferrosilicon not only meets the deoxygenation requirements of steelmaking, but also has the advantages of desulfurization performance and large specific gravity and strong penetration force.
In addition, in the steelmaking industry, the use of ferrosilicon powder at high temperature to emit a large number of heat this feature, often used as ingot cap heating agent to improve the quality and recovery rate of ingots. (2) used as a inoculation agent and a spheroidization agent in the cast iron industry. Cast iron is an important metal material in modern industry, it is cheaper than steel, easy to melt smelting, with excellent casting performance and much better than steel seismic capacity. In particular, ductile iron, its mechanical properties reach or close to the mechanical properties of steel.
Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbide in iron, promote graphite precipitation and spheroidization, so in the production of ductile iron, Ferrosilicon is an important inoculation agent (to help precipitate graphite) and spheroidization agent. (3) in the production of Ferroalloy as a reducing agent. Not only is there a large chemical affinity between silicon and oxygen, but the carbon content of high silicon ferrosilicon is very low.
Therefore, high silicon ferrosilicon (or silicone alloy) is a more commonly used reducing agent in the production of low carbon ferroalloy in ferroalloy industry.
(4) 75# Ferrosilicon in Pijiang magnesium smelting is commonly used in the high temperature smelting process of magnesium metal, the magnesium in the CaO.MgO is replaced, each production of a ton of magnesium metal will consume about 1.2 tons of ferrosilicon, the production of magnesium metal plays a great role. (5) The use in other areas. Ferrosilicon powder, which has been finely or atomized, can be used as a suspension phase in the mineral processing industry. In the welding rod manufacturing industry can be used as a welding rod coating.
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High silicon ferrosilicon can be used in the chemical industry to manufacture silicone and other products. Among these uses, the steelmaking industry, the foundry industry and the Ferroalloy industry are the largest users of Ferrosilicon. They consume about 90% of the ferrosilicon. In a variety of different grades of Ferrosilicon, the most widely used is the 75% ferrosilicon.
In the steelmaking industry, 3-5kg75% Ferrosilicon is consumed for every 1t steel produced. Folded
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