Magnetic gravity pre-selection, coarse concentrate regrinding and hematite tailings recovery process

A technology for hematite tailings and rough concentrate, which is applied in the field of iron ore beneficiation, can solve the problems of difficulty in recovery and affect the separation effect of hematite, so as to improve the utilization rate, reduce the discharge of tailings, and improve the selected grade. Effect

Active Publication Date: 2017-10-13
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0005] It is difficult to effectively realize the monomer dissociation of magnetic iron minerals in tailings by traditional technology, and at the same time, this part of magnetic iron in the form of conjoined bodies will also affect the separation effect of hematite
Therefore, it is difficult to recover the tailings discharged from the hematite concentrator in the existing production process

Method used

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  • Magnetic gravity pre-selection, coarse concentrate regrinding and hematite tailings recovery process

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Embodiment Construction

[0020] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the magnetic gravity pre-selection of the present invention, coarse concentrate regrinding and re-election hematite tailings recovery process are characterized in that comprising the following steps:

[0022] 1) Feed the hematite tailings slurry with a grade of 8%-15% into the roughing spiral chute operation, the concentrate from the roughing spiral chute operation is fed into the selection spiral chute operation, and the middling ore from the selection spiral chute operation Circulation, the tailings from the selection spiral chute operation and the tailings from the rougher spiral chute operation are combined into the permanent magnetic scavenging operation for scavenging; the concentrate from the selection spiral chute operation and the permanent magnetic scavenging operation are combined into g...

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Abstract

The invention relates to a recovery process of magnetic gravity pre-selection, coarse concentrate regrinding and hematite tailings recovery, which adopts "coarse-fine spiral chute, permanent magnet-grinding classification-strong magnetic, centrifuge process" for separation , when the grinding particle size is ‑325 mesh 92.5%, the separation indicators obtained are: feed grade 12.63%, concentrate grade 67.95%, concentrate yield 4.00%, recovery rate 21.52%, tailings grade 10.33%. The tailings are discharged to the tailings pond by gravity in the early stage, and then pumped to the tailings pond in the later stage. The overflow water of each thickener is returned to the tailings recovery plant for recycling.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a recovery process of magnetic gravity pre-selection, coarse concentrate regrinding and re-selection of hematite tailings. Background technique [0002] Metallurgical and mining enterprises have extracted useful mineral products in the production process, but also produced a large amount of tailings waste. As steel production increases, tailings waste will increase. At present, iron tailings wastes are all stored in tailings ponds, which not only occupies a large amount of land, but also has a certain impact on the surrounding environment. [0003] Due to technical reasons, the tailings produced by the concentrator while producing iron ore concentrate, such as the tailings discharged from the hematite concentrator, have not been recycled. The iron minerals lost in the tailings are mainly hematite (accounting for 70% of tailings), followed by magnetic iron (30% of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62B03C1/30
Inventor 孙德娣陈强戴兴宇于克旭吴凡
Owner ANSTEEL GRP MINING CO LTD
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