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Mineral processing technology for low grade hematite ore

A hematite and process technology, which is applied in the field of lean hematite beneficiation technology, can solve the problems of loss of strong magnetic minerals, large flotation volume, and high flotation tailings grade, so as to reduce production costs, reduce specific gravity, and reduce treatment. volume and the effect of flotation reagent consumption

Active Publication Date: 2014-12-03
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0006] However, there are still the following deficiencies in the current technological process. First, the amount of flotation is large, and the consumption of reagents is also large; second, the grade of flotation tailings is high, and the flotation tailings still contain strong magnetic minerals that are easy to separate , leading to the loss of recyclable strong magnetic minerals, especially when the FeO content in the raw hematite ore is high

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  • Mineral processing technology for low grade hematite ore

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Embodiment Construction

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

[0021] Such as figure 1 As shown, a kind of depleted hematite ore beneficiation process of the present invention comprises: feeding hematite raw ore into a closed-circuit grinding and grading operation composed of a stage grinding and a grading cyclone; the particle size is -200 mesh and the content is 50 ~60% of the primary classifying cyclone overflow is fed into the coarse and fine class cyclone, and the coarse and fine class cyclone is fed into the coarse selection spiral chute for coarse selection; the rough selection spiral chute concentrate is fed into the selection spiral The chute performs the selection operation, the concentrated ore in the selected spiral chute is fed into the high-frequency vibrating screen 1, the middle ore in the selected spiral chute is returned to gravity selection, the selected spiral chute is fed to the o...

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Abstract

The invention relates to a mineral processing technology for low grade hematite ore. The technologies of grading, ore grinding and magnetic separation are additionally set before floatation, ferromagnetic fine fraction magnetic ore concentrate can be recycled in advance in a magnetic separation mode, monomer separation is further carried out at the upper part of a coarse fraction sieve in flux-weakening ore concentrate and ferromagnetic ore concentrate through additional technologies of sieving and regrinding, the ore is returned, recycled and reselected, and tail escaping is realized in advance; by adopting the two modes, the flotation pulp handling capacity and floatation reagent consumption can be greatly reduced, the production cost is reduced, the ore concentrate quality is stabilized, and the proportion of flotation tailings in comprehensive tailings is reduced, so that the grade of comprehensive tailings is reduced to 10%-11% from 11%-14%.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, in particular to a beneficiation process of lean hematite ore. Background technique [0002] At present, the process of separating lean hematite usually adopts the combined grinding-gravity separation-strong magnetic-anion reverse flotation beneficiation process. Closed-circuit grinding and classification operation; the overflow is sent to the coarse and fine cyclone for coarse and fine classification, and the coarse and fine cyclone is fed into the heavy selection and coarse selection spiral chute for rough selection; the rough selection spiral chute concentrate is fed into the selection spiral The chute performs the selection operation, the selected spiral chute concentrate is fed into the high-frequency vibrating screen, the selected spiral chute medium ore is returned to re-selection, the selected spiral chute is fed to the ore for re-election; [0003] The tailings in the roughing...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 平守国李绍春李娜李清泉裴春雨
Owner ANSTEEL GRP MINING CO LTD
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