Suspension magnetization roasting and magnetic separation of Ansteel eastern iron tailings
YU Jian-wen1,2,3, OU Yang1,3, QU Kong-hui1,3, GAO Peng1,2,3, LI Yan-jun1,3, SUN Yong-sheng1,2,3
1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China; 2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China; 3. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology, Shenyang 110819, Liaoning, China
Abstract：In order to extract and recover iron from Ansteel eastern iron tailings, the influence factors on the performance of suspension magnetization roasting and magnetic separation of high-intensity magnetic concentrate (w(TFe) 26.50%) from Ansteel eastern iron tailings were investigated. Magnetization roasting device is a laboratory-batch scale fluidized reactor and it was performed under mixed CO and N2atmosphere. The optimized conditions were determined as the gas flow of 800 mL/min, the roasting temperature of 600 ℃, the CO concentration of 25%, and the reduction time of 2.5 min. The roasted products were ground to 90% passing 0.023 mm, and then a high-grade magnetic concentrate containing 65.91% w(TFe) with an iron recovery of 94.06% was obtained. According to the phase analysis, it can be seen that the hematite and limonite were selectively reduced to magnetite under the above roasting conditions,realizing precise control of phase transformation of iron minerals.
余建文, 欧杨, 曲孔辉, 高鹏, 李艳军, 孙永升. 鞍钢东部铁尾矿悬浮磁化焙烧-磁选试验[J]. 钢铁, 2021, 56(7): 25-30.
YU Jian-wen, OU Yang, QU Kong-hui, GAO Peng, LI Yan-jun, SUN Yong-sheng. Suspension magnetization roasting and magnetic separation of Ansteel eastern iron tailings[J]. Iron and Steel, 2021, 56(7): 25-30.
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2021, Vol. 56 
