Ferro Silicon is iron and silicon composed of iron alloy. Ferro Silicon is based on coke, steel scrap, quartz (or silica) as raw materials, made of electric furnace smelting iron-silicon alloy. Since silicon and oxygen are easy to synthesize silica, Ferro Silicon is often used as a deoxidizer for steelmaking, and at the same time it is advantageous to increase the temperature of the molten steel while deoxidizing it due to the large amount of heat generated during the formation of SiO2. At the same time, Ferro Silicon can also be used as alloying agent, widely used in low-alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel, Ferro Silicon in ferroalloy production and chemical industry, commonly used as a reducing agent.
Use of Ferro Silicon:
(1) Used as a deoxidizer and a gold alloy in the steelmaking industry. In order to obtain chemical composition of qualified steel and to ensure the quality of steel, in the final stage of steelmaking must be deoxidized, silicon and oxygen between the chemical affinity is large, so Ferro Silicon is a strong steel oxide for precipitation and diffusion deoxidation. In the steel to add a certain amount of silicon, can significantly improve the strength of steel, hardness and flexibility, and thus in the smelting structural steel (silicon 0.40-1.75%), tool steel (containing SiO.30-1.8%), spring steel Containing SiO00-2-8%) and silicon steel for transformers (2.81-4.8% silicon), Ferro Silicon is also used as a gold alloy. In addition, in the steel industry, the use of Ferro Silicon powder at high temperature olefins can release a lot of heat this feature, often used as a steel ingot heating agent to improve the quality and recovery of ingots. (2) used as inoculants and nodulizers 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 the steel seismic capacity. Especially ductile iron, its mechanical properties meet or close to the mechanical properties of steel. The addition of a certain amount of Ferro Silicon in the cast iron can prevent the formation of carbides in the iron and promote the precipitation and spheroidization of graphite. Thus, in the production of ductile iron, Ferro Silicon is an important inoculant (to help the precipitation of graphite) and nodular The (3) ferrous alloy production as a reducing agent. Not only between the silicon and oxygen chemical affinity is very large, and high silicon Ferro Silicon carbon content is very low. Therefore, high silicon Ferro Silicon (or siliceous alloy) is a ferroalloy industry in the production of low-carbon ferroalloy is more commonly used as a reducing agent. (4) 75 # Ferro Silicon in the Piejiang method of magnesium commonly used in the process of high temperature metal smelting, CaO.MgO in the replacement of magnesium, the production of one ton of metal magnesium will consume about 1.2 tons of Ferro Silicon, Magnesium metal production plays a significant role. (5) in other uses. Milled or atomized treated Ferro Silicon powder can be used as a suspension phase in the dressing industry. In the electrode manufacturing industry can be used as electrode coating. High silicon Ferro Silicon in the chemical industry can be used to manufacture silicone and other products. In these applications, the steelmaking industry, the foundry industry and the ferroalloy industry are the largest users of Ferro Silicon. They consume about 90% more Ferro Silicon. Among the various grades of Ferro Silicon, the most widely used is 75% Ferro Silicon. In the steel industry, each production of 1t steel consumption of about 3-5kg75% Ferro Silicon.