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A novel and green metallurgical technique of highly efficient iron recovery from refractory low-grade iron ores. ACS Sustain Chem Eng, 2019, 7(22): 18726 [23] Ma B Z, Yang W J, Xing P, et al. Pilot-scale plant study on solidstate metalized reduction-magnetic separation for magnesium-rich nickel oxide ores. Int J Miner Process, 2017, 169: 99 [24] Wu S C, Sun T C, Yang H F. Study on phosphorus removal of high-phosphorus oolitic hematite abroad by direct reduction and magnetic separation. Met Mine, 2019(11): 109 (吴世超, 孙体昌, 杨慧芬. 国外某高磷鲕状赤铁矿直接还原−磁 选降磷研究. 金属矿山, 2019(11):109) [25] Yang M, Zhu Q S, Fan C L, et al. Roasting-induced phase change and its influence on phosphorus removal through acid leaching for high-phosphorus iron ore. Int J Miner Metall Mater, 2015, 22(4): 346 [26] Huang W S, Yan L, Wu S C, et al. Study on the process mineralogy of a high phosphorus oolitic iron ore in abroad. Met Mine, 2020(9): 137 (黄武胜, 延黎, 吴世超, 等. 国外某高磷鲕状铁矿石工艺矿物学 研究. 金属矿山, 2020(9):137) [27] Guo Z Q, Zhu D Q, Pan J, et al. Innovative methodology for comprehensive and harmless utilization of waste copper slag via selective reduction-magnetic separation process. J Clean Prod, 2018, 187: 910 [28] Zhu D Q, Xu J W, Guo Z Q, et al. Synergetic utilization of copper slag and ferruginous manganese ore via co-reduction followed by magnetic separation process. J Clean Prod, 2020, 250: 119462 [29] · 8 · 工程科学学报,第 44 卷,第 X 期