New technology for sorting lean hematite and magnetite orecontaining iron carbonate

A technology of magnetite ore and iron carbonate, applied in the direction of solid separation, wet separation, chemical instruments and methods, etc., can solve the problems of inability to meet the separation and utilization of Guanbaoshan iron ore, fine particle size, etc., to avoid overgrinding, improve Metal recovery rate, the effect of reducing the amount of regrinding and selection

Active Publication Date: 2012-10-17
鞍钢集团矿业设计研究院有限公司
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Problems solved by technology

In view of the characteristics of Guanbaoshan iron ore with fine particle size and high content of iron carbonate minerals, the existing production process cannot meet the separation and

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  • New technology for sorting lean hematite and magnetite orecontaining iron carbonate

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments.

[0020] Such as figure 1 As shown, the new process for sorting iron carbonate-poor hematite magnetite ores of the present invention is characterized in that: first adopt "stage grinding, strong magnetic tailings throwing process" to enrich and throw tails, and obtain mixed magnetic separation concentrate; then adopt " One-stage roughing, one-stage beneficiation and two-stage scavenging open-circuit reverse flotation process" sorting mixed magnetic separation concentrate to obtain high-grade hematite concentrate; Iron carbonate minerals are separated by "one-stage roughing and one-stage selection closed-circuit centrifuge process" to obtain siderite concentrate, and the tailings of the centrifuge are sent to the weak magnetic machine for separation to recover fine-grained magnetic concentrate. Proceed as follows:

[0021] 1) Crush the iron carbonate-poor hematite magnet...

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Abstract

The invention relates to a new technology for sorting a lean red magnetite ore containing iron carbonate, which is characterized by comprising the following steps of: enriching and discarding tailings by adopting a 'technology for stage grinding and strong magnetic discarding tailings', thereby obtaining a mixed magnetic concentrate; sorting the mixed magnetic concentrate by adopting an 'open-circuit reverse flotation technology with one-stage roughing, one-stage fining and two-stage scavenging', thereby obtaining a high-grade hematite and magnetite concentrate; adopting a 'close-circuit centrifuge technology with one-stage roughing and one-stage fining' for sorting a high iron carbonate ore enriched in mine obtained by adopting the 'open-circuit reverse flotation technology', thereby obtaining a siderite concentrate; feeding the centrifuge tailings into a weak magnetic machine and sorting; and recycling fine fraction magnetic concentrates. The new technology provided by the inventionhas the advantages that the lean hematite and magnetite ore containing iron carbonate is sorted by adopting a 'combined sorting process flow with stage grinding, strong magnetic discarding tailings, reverse flotation-centrifuge', so that the sorting indexes of the whole iron grade of the obtained comprehensive concentrate being more than 65% and the metal recovery rate being more than 65% are achieved and the maximization of utilization benefit of iron ore resources is realized.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a new process for sorting iron carbonate-poor hematite magnetite ore. Background technique [0002] Anshan-style lean hematite ore currently generally adopts "stage grinding, coarse and fine separation, gravity separation-strong magnetic-anion reverse flotation process". Workshop, Qidashan Iron Ore Concentration Plant, Anqian Mining Company Concentration Plant, Gongchangling Concentration Plant Third Concentration Plant, Tanggang Sijiaying Iron Ore Concentration Plant, Angang Wuyang Iron Ore Concentration Plant, etc. all adopt this process. The concentrate grade can reach 65-68%, and the metal recovery rate can reach 75-80%. [0003] Daxigou siderite mine in Shaanxi adopts "rotary kiln roasting-magnetic separation-reverse flotation process", and obtained advanced indicators of roasted ore grade of 30.08%, final concentrate grade of 61.48%, total tailings grade o...

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Application Information

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IPC IPC(8): B03B7/00B03B1/00
Inventor 刘双安杨晓峰梅灿国孟娜
Owner 鞍钢集团矿业设计研究院有限公司
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