Why should the content of silicon be controlled in light - fired magnesium ball

At present, the outer layer of cables inside most buildings is made of non-refractory materials, which promotes the occurrence of fires and causes huge property losses and casualties. How to solve such problems and prevent them from happening has become a hot topic concerned by relevant departments and the public. What are the advantages of using lightly burned magnesium balls? Light fired magnesium ball is a kind of alkaline refractory products, the role of CaO: it can replace the CaO in the lime, ensure the alkalinity of steel slag, reduce the amount of lime. CaO can react with SiO2 in slag CaO+SiO2=3CaO.SiO2, Ca2SiO4, C3S, C2S are high melting point material, if the content of CaO in slag is enough, the main component of light burning magnesia ball to MgO can be. Although the superheat of slag can be reduced and the slag can be thickened by adjusting the operation of MgO in slag, the FeO content and the saturation solubility of MgO in slag can be reduced by using C -- O reaction C+(FeO)=Fe+CO, so that the MgO in slag can reach or exceed the saturation value more easily. Thus, the modified slag has both high refractoriness and appropriate viscosity to meet the conditions of slag splashing furnace protection, so it can also be properly carburized in light burning magnesia ball.

There are four main benefits of using light fired magnesium balls:

1, suitable for splashing slag protection furnace slag alkalinity: R(CaO/SiO2) about 3.5

2, the appropriate amount of slag (tons of steel) : 90-- 100Kg/t

3, appropriate slag splashing time: 2--4min

4, control the final slag MgO value:

5, the final slag MgO content (recommended value %) choose the appropriate light burning magnesium ball: ≤MgO≧45%, according to the final slag of the converter appropriate adjustment of the composition of light burning magnesium oxide ball.