High Temperature Reduction and Softening Properties of Pellets with Magnesite

There exists a need to improve the high temperature reducibility and lower the softening rate of pellets in order to get high productivity in the blast furnace. This paper introduces the influence of the MgO/SiO2 and the CaO/SiO2 ratios in pellets on the high temperature reduction and softening properties. The pellets whose MgO/SiO2 ratio is held at above 0.6, and whose CaO/SiO2 ratio is held at below 0.05, are proved to have better high temperature properties than those of acid or self-fluxed pellets. There was no deterioration in properties, even if the quantity of SiO2 is significant.