Magnetite Carbon-Free Sintering Process Based on Electromagnetic Induction

Abstract

The existing sintering process is to add a certain proportion of water to the sintering raw materials such as iron ore powder, coke powder, and quicklime. After mixing and pelletizing, the raw materials are sintered on the pallet train to cause a series of high temperature physical and chemical changes. Existing sintering processes have high energy consumption and high pollution. In order to reduce energy consumption and pollution in the existing sintering process, it was developed as Magnetite carbon-free sintering process based on electromagnetic induction. Compared with the existing sintering process, this new magnetite sintering process could achieve high thermal efficiency, with no coke added. It could reduce pollutant emission, e.g. COX, NOX, SOX. etc., decreasing energy consumption and return fines rate. In this study, we focus on the influences of iron powder’s addition amount, insulation time, insulation temperature, and heating power on sinter, and we will evaluate its performances by using the mineral phase composition of sinter, XRD analysis, compressive strength, and other indicators. Moreover, we find that this new sintering process can achieve better metallurgical properties and mechanical strength.