国外某风化型钒钛铁矿选矿试验研究

Experimental study on beneficiation of a weathered V-Ti iron ore from abroad

针对国外某深度蚀变氧化型钒钛铁矿,铁矿物与钛矿物难以物理选矿实现分离,脉石矿物的比磁化系数、比重与金属矿物差异较大、易磨矿解离的特征,开展了选矿富集钒钛铁试验研究,对比了磁选回收工艺、分级-磁选回收工艺及重选回收工艺,确定磁选回收工艺为最适宜的回收工艺。磁选回收工艺获得了可市售的含钒铁精矿含Fe 60.52%、V_(2)O_(5)1.03%,回收率分别为Fe 8.12%、V_(2)O_(5)8.62%,钒钛铁混合精矿Fe 50.03%、V_(2)O_(5)0.80%、TiO_(2)16.01%,回收率分别为Fe 78.61%、V_(2)O_(5)78.45%、TiO_(2)82.88%的选别指标,混合精矿钒、钛、铁品位较高,可作为冶金进一步获取钒、钛、铁的原料。

For a severely weathered and oxidized V-Ti iron ore from abroad,Fe minerals and Ti minerals are disseminated closely to each other thus it is difficult to separate by physical beneficiation.Based on the specific magnetization coefficient and specific gravity,gangue minerals are quite different from those of metal minerals and are easy to dissociate by grinding,the study on primary enrichment of V-TiFe was carried out.Recovery of V-Ti-Fe by magnetic separation,classification–magnetic separation and gravity separation were compared.The result shows that the magnetic separation is the most suitable method for the ore.The saleable V-bearing iron concentrate consisting of Fe 60.52%,V_(2)O_(5)1.03%with the recovery of Fe 8.12%,V_(2)O_(5)8.62%,and the V-Ti-Fe bulk concentrate consisting of Fe 50.03%,V_(2)O_(5)0.80%,TiO_(2)16.01%with the recovery of Fe 78.61%,V_(2)O_(5)78.45%,TiO_(2)82.88%were obtained by magnetic separation.The bulk concentrate with high grade of V_(2)O_(5) and TiO_(2) could be used as raw materials for extracting vanadium,titanium and iron.