Study for Influence of Prereduction Degree on the Softening and Melting Properties of Sinter

Softening and melting properties of sinter depends not only on the composition and nature of the iron ore itself, but also by the degree of prereduction. In this paper, according to the curve of reduction degree changes over time at temperature of 900°C, flow of reaction gas, composition of reaction gas, reaction time and reaction temperature were got in order to make the sinter different prereduction degree. Then, on this basis, influence of prereduction degrees on the softening and melting properties of sintering ore was studied using the method of continuous test in the same container by metallurgical properties of softening temperature, melting temperature, softening interval, melting interval and air permeability.