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Feasibility Study on Iron Extraction from Iron Concentrate of Red Mud by Sintering and Pyrometallurgical Process
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Ying LIN1, Jianjun GAO2, 3, Feng WANG2, 3, Bingqiang WU2, 3, Wei WU1
Mining and Metallurgical Engineering | 2026, 46(3) : 238 - 243
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Mining and Metallurgical Engineering | 2026, 46(3): 238-243
• METALLURGY •
Feasibility Study on Iron Extraction from Iron Concentrate of Red Mud by Sintering and Pyrometallurgical Process
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Ying LIN1, Jianjun GAO2, 3, Feng WANG2, 3, Bingqiang WU2, 3, Wei WU1
Affiliations
  • 1.Metallurgical Process Research Institute, Central Iron & Steel Research Institute Co., Ltd., Beijing 100081, China
  • 2.State Key Laboratory of Advanced Steel Processes and Products, Central Iron & Steel Research Institute Co., Ltd., Beijing 100081, China
  • 3.Beijing Hydrogen Metallurgy Technology Research of CISRI Co., Ltd., Beijing 100081, China
doi: 10.3969/j.issn.0253-6099.2026.03.036
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An innovative technical route consisting of sintering and pyrometallurgical processing technique was proposed to extract iron from an iron concentrate of red mud. The results show that under the following optimal sintering conditions for high-alumina iron concentrate, including fuel ratio of 12%, moisture content of 18.5%-19.0%, and basicity (R2) of approximately 4.85 (with quicklime as flux), the obtained sinter has its metallurgical properties meet the requirements of small-scale smelting equipment. To improve the fluidity of final high-alumina slag from blast furnace smelting, 17% calcium oxide is added for modification, leading to the viscosity of the slag down to 0.61 Pa·s at 1 450 ℃. As a result, an efficient slag-iron separation can be actualized. Such slag can be used to prepare premelted slag or synthetic slag. Compared with conventional technique for iron recovery from red mud, this process is characterized by a short flow, low cost and large processing capacity. This research provides a theoretical basis for resource utilization of red mud by using solid waste smelting furnaces and laboratory-scale blast furnaces.

iron concentrate of red mud  /  pyrometallurgical iron extraction  /  sinter  /  basicity  /  viscosity  /  Bayer process  /  high-alumina red mud
林瑛, 高建军, 王锋, 武兵强, 吴巍. 赤泥铁精矿烧结-火法提铁的可行性研究. 矿冶工程杂志, 2026 , 46 (3) : 238 -243 . DOI: 10.3969/j.issn.0253-6099.2026.03.036
Ying LIN, Jianjun GAO, Feng WANG, Bingqiang WU, Wei WU. Feasibility Study on Iron Extraction from Iron Concentrate of Red Mud by Sintering and Pyrometallurgical Process[J]. Mining and Metallurgical Engineering, 2026 , 46 (3) : 238 -243 . DOI: 10.3969/j.issn.0253-6099.2026.03.036
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Year 2026 volume 46 Issue 3
108
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.03.036
  • Receive Date：2025-12-10
  • Online Date：2026-10-08
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  • Received：2025-12-10
Affiliations
    1.Metallurgical Process Research Institute, Central Iron & Steel Research Institute Co., Ltd., Beijing 100081, China
    2.State Key Laboratory of Advanced Steel Processes and Products, Central Iron & Steel Research Institute Co., Ltd., Beijing 100081, China
    3.Beijing Hydrogen Metallurgy Technology Research of CISRI Co., Ltd., Beijing 100081, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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