Influence of ferrosilicon on steelmaking

Silicon is the raw material for smelting ferrosilicon, ferrosilicon suppliers believe that generally with high ferrosilicon rolling, in the process of electric furnace steelmaking, with ferrosilicon powder diffusion deoxidation. Whether the particle size of ferrosilicon powder is too fine or too coarse, will affect the synthesis of ferrosilicon nitride. The particle size of ferrosilicon powder has a great influence on the quality of synthetic ferrosilicon nitride. The effect of particle size of ferrosilicon powder on the synthesis of ferrosilicon nitride was studied. But what kind of silicon is suitable for smelting ferrosilicon? What is the effect of ferrosilicon on steel during smelting?

To reduce slag content, reduce power consumption and increase output, the silicon content is required to be above 97%. The pink lines on the surface of silica are the presence of alumina. In silicon dioxide, alumina is a harmful impurity, its melting point at about 2050℃, when the slag contains higher alumina, will cause slag discharge difficulties. At the same time, silicon dioxide contains a large amount of alumina, easy to make aluminum reduction into ferrosilicon, increases the content of aluminum in ferrosilicon, affects the quality of ferrosilicon. Therefore, no more than 1% alumina is needed in silica. The initial particle size of ferrosilicon powder is too fine, which leads to the initial reaction being too intense, and the sample is burnt too much, resulting in incomplete nitriding. But the nitriding effect is better than the coarse ferrosilicon powder. For coarse ferrosilicon powder, an appropriate extension of holding time can achieve a nitriding effect. But with the extension of holding time, the nitriding effect of fine ferrosilicon powder is not as obvious as that of coarse ferrosilicon powder.

Due to the presence of sulfur (S) and silicon (Si) in the smelting process to form sulfide silicon, such as SIS, Sis2, and other compounds, the demand for phosphorus pentoxide does not exceed 0.02%.The sulfur content of silicon. These compounds are volatile at high temperatures, so the sulfur content of silicon is not needed. The high content of calcium oxide (calcium oxide) and magnesium oxide (magnesium oxide) in silica requires that the content of calcium oxide and magnesium oxide be less than 1% when smelting, which increases the slag volume and erodes the iron hole. The above content is the ferrosilicon manufacturers for you to introduce the requirements of silica for smelting ferrosilicon, but also according to the choice of ferrosilicon furnace to decide.