This study used specularite, a high-gradient magnetic separation concentrate, as a raw material in reverse flotation. An iron concentrate with a grade of 65.1wt% and a recovery rate of 75.31% were obtained. A centrifugal concentrator served as the deep purification equipment for the preparation of iron oxide red pigments, and its optimal rotating drum speed, feed concentration, and other conditions were determined. Under optimal conditions, a high-purity iron oxide concentrate with a grade of 69.38wt% and a recovery rate of 80.89% were obtained and used as a raw material for preparing iron oxide red pigment. Calcining with sulfuric acid produced iron red pigments with different hues. Simultaneously, middlings with a grade of 60.20wt% and a recovery rate of 17.51% were obtained and could be used in blast furnace ironmaking. High-value utilization of specularite beneficiation products was thus achieved.

这项研究使用了高梯度磁选精矿-富铬铁矿作为反浮选的原料。得到了品位为65.1wt％的铁精矿，回收率为75.31％。离心浓缩器用作制备氧化铁红颜料的深层纯化设备，并确定了其最佳转鼓速度，进料浓度和其他条件。在最佳条件下，获得了品位为69.38wt％，回收率为80.89％的高纯氧化铁母料，用作制备氧化铁红颜料的原料。用硫酸煅烧产生具有不同色调的铁红色颜料。同时获得了品位为60.20wt％，回收率为17.51％的中矿，可用于高炉炼铁。