Abstract
Biomass, as a clean energy source, has great potential in reducing emissions and protecting the environment. This study investigates the influence of biomass as a reducing agent on the magnetization roasting process of iron tailings, and utilizes methods such as TG, XRD, VSM to analyze the thermal decomposition of biomass, phase transition and magnetic transformation of iron tailings, in order to explain the mechanism of iron recovery through magnetization roasting. The results show that at a roasting temperature of 700 °C, roasting time of 15 min, and 10% of the poplar sawdust (PS) used, the iron grade of the concentrate obtained through weak magnetic separation is 65.2%, with iron recovery rate of 96%. The magnetic saturation intensity increases from 0.107 emu/g to 59.28 emu/g. The study demonstrates that the combination of biomass magnetization roasting and weak magnetic separation can effectively recover iron from low-grade iron tailings.
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