Experimental Study on Pre-concentration and Suspension Magnetization Roasting of Donganshan Iron Ore Flotation Tailing

doi:10.12068/j.issn.1005-3026.2022.05.014

Abstract

Abstract: To achieve the utilization of the flotation tailing of Donganshan iron ore， pre-concentration and suspension magnetization roasting tests were carried out. The results indicate that pre-concentration of the flotation tailing mainly consists of hematite， limonite， siderite and quartz， and iron grade is 31.13%. The appropriate suspension magnetization roasting conditions were determined as roasting temperature of 520℃， roasting time of 20min， H₂ concentration of 20%， and gas flow rate of 600mL/min. The roasted product was benefited by low-intensity magnetic separation， and the concentration with iron grade of 64.23% and recovery of 79.53% was obtained. The analysis on roasted product by physical iron phase， XRD， and VSM indicates that the hematite， limonite， and siderite are reduced to magnetite during the suspension magnetization roasting process， and the saturation magnetization and magnetic susceptibility obviously increase.

Key words: flotation iron tailing; resource utilization; suspension magnetization roasting; reduction roasting; magnetic separation

CLC Number:

TP20

SHAO An-lin ， SU Xing-guo， HAN Yue-xin， LI Yan-jun. Experimental Study on Pre-concentration and Suspension Magnetization Roasting of Donganshan Iron Ore Flotation Tailing[J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 703-708.

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