Experimental Study on Upgrading of Chengchao Iron Concentrate by Belt Magnetic Separation
Aiming at the shortage of high-grade iron concentrate required for hydrogen-based reduction shaft furnaces,this study investigates the upgrading of Chengchao iron concentrate through magnetic drum concentration,weak magnetic sepa-ration-magnetic column concentration,and belt magnetic separation.The results indicate that when the grinding fineness is-0.037 mm accounting for 85%,two-stage belt magnetic separation process can achieve TFe grade of 70.16%,yield of 87.33%,and TFe recovery rate of 92.51%.By optimizing the parameters of belt magnetic separation and adding an additional row of washing water outlets for magnetic separation,concentrate with TFe grade of 70.78%and yield of 45.71%is obtained,while the tailings have TFe content of 62.40%and yield of 54.29%.Both belt magnetic separation concentration can produce concentrate products with the required TFe grade,and the tailings obtained from the process with the additional washing water outlet could be utilized directly.This study provides a reference for the preparation of high quality iron concentrate from domes-tic fine-grained magnetite concentrate.
Chengchao Iron Mineupgradinghigh grade iron concentratemagnetic columnbelt magnetic separator
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