Magnetic separation characteristics of steel slag powder in a fluidized dry magnetic network separator

Abstract

Steel slag can separate inert minerals by the mineral separation method and prevent the hydration of active minerals caused by wet magnetic separation. In order to solve the problems of low specific magnetic susceptibility, small grain size, and difficult separation of inert minerals in steel slag, fluidized dry magnetic network separation equipment was used in this study. Through the study of the influence of operating parameters, such as magnetic mesh aperture, fluidized gas speed, and background magnetic field strength in the equipment, the Longang steel slag (converter steel slag, treated by the hot disintegrating method) was effectively separated. The results show that the total iron content of the final product scavenging product decreased from 16.90 to 11.93 wt. %, which accounted for 56.16 wt. % of the total weight of the raw material, which is used as a cementitious material to replace part of the cement. The total iron content of the concentrate product increased more than twice from 16.90 to 34.27 wt. %, which accounted for 3.36 wt. % of the total weight of the raw material, which is used as ironmaking raw material through subsequent treatment. Through this study, the steel slag is effectively separated and utilized.