Beneficiation of low-grade hematite and maghemite mixed iron ore to recover iron bearing minerals comprises e.g. providing low grade hematite and maghemite associated iron ore feed, screening the iron ore, grinding, enriching non-magnetic concentrate by rougher medium intensity magnetic separation
	PANDA D K; ATTEL U; SAH R; UMADEVI T
	2023-07-15
专利权人	JSW STEEL LTD (JSWS-Non-standard)
申请日期	2023-07-15
专利号	IN202321047804-A
成果简介	NOVELTY - Beneficiation of low-grade hematite and maghemite mixed iron ore to recover iron bearing minerals comprises: (i) providing the low grade hematite and maghemite associated iron ore feed including iron, silicon dioxide, aluminum oxide and loss on ignition (LOI); (ii) screening of the low grade iron ore feed using double deck screen as beneficiated final products based on enhanced iron content; (iii) subjecting to grinding to pass at least 80% passing below 0.15 mm; (iv) processing of thus ground material of step (ii) above through medium intensity magnetic separation (MIMS) process to generate the magnetic concentrate with enhanced iron; (v) processing of MIMS non-magnetic through magnetic separation process using rougher WHIMS by subjecting to magnetic field intensity based recovery of the iron-bearing minerals as non mag concentrate; and (vi) enriching the non-magnetic concentrate through the rougher WHIMS magnetic concentrate iron grade, and magnetic separating. USE - The method is useful for beneficiation of low-grade hematite and maghemite mixed iron ore to recover iron bearing minerals. ADVANTAGE - The process utilizes hematite and mixed maghemite low grade iron ore beneficiation would enable excellent concentrate grade and higher recovery through screening, grinding to required liberation size, medium intensity magnetite separation, followed by two stage wet high intensity magnetic separation process. DETAILED DESCRIPTION - Beneficiation of low-grade hematite and maghemite mixed iron ore to recover iron bearing minerals comprises (i) providing the low grade hematite and maghemite associated iron ore feed including 52-55 wt.% iron, 14-17.3 wt.% silicon dioxide, 4-5.55 wt.% aluminum oxide and 2.29-3.4 wt.% loss on ignition (LOI); (ii) screening of the low grade iron ore feed using double deck screen to separate -40+10 mm, -10+5 mm and -5 mm and to separate the -40+10 mm and -10+5 mm as beneficiated final products based on enhanced iron content; (iii) subjecting the -5 mm size to grinding to pass at least 80% passing below 0.15 mm; (iv) processing of thus ground material of step (ii) above through medium intensity magnetic separation (MIMS) process to generate the magnetic concentrate with enhanced iron; (v) processing of MIMS non-magnetic through magnetic separation process using rougher WHIMS by subjecting to magnetic field intensity based recovery of the iron-bearing minerals as non mag concentrate; and (vi) enriching the non-magnetic concentrate of step (v) above through the rougher WHIMS magnetic concentrate iron grade, to carry out magnetic separation process using cleaner WHIMS, to generate beneficiated and recovered iron containing enriched (a) -40+10mm, (b) -10+5mm, (c) MIMS magnetic concentrate and (d) cleaner WHIMS magnetic concentrate together as final beneficiated concentrate. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of developed beneficiation process for low grade hematite and maghemite associated iron ore.
IPC 分类号	B03B-007/00 ; B03D-003/06 ; C01G-049/06 ; C21B-013/00 ; C22B-001/00
国家	印度
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21283
专题	中国科学院新疆生态与地理研究所
作者单位	JSW STEEL LTD (JSWS-Non-standard)
推荐引用方式 GB/T 7714	PANDA D K,ATTEL U,SAH R,et al. Beneficiation of low-grade hematite and maghemite mixed iron ore to recover iron bearing minerals comprises e.g. providing low grade hematite and maghemite associated iron ore feed, screening the iron ore, grinding, enriching non-magnetic concentrate by rougher medium intensity magnetic separation. IN202321047804-A[P]. 2023.

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