Method for iron concentrate in ore grinding, coarse and fine separation, gravity-magnetic-flotation process tailings in recovery stage

A technology of stage grinding and coarse subdivision, applied in chemical instruments and methods, classification, flotation, etc., can solve the problems of differences in particle size composition and high recovery rate of hematite, and achieve significant economic benefits.

Inactive Publication Date: 2011-11-30
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0003] For the recovery of lean hematite tailings obtained by "stage grinding, coarse and fine separation, and combined gravity-magnetism-flotation process", although many experimental studies have been carried out, due to the improvement of the level of mineral processing technology, the existing The production process has a high recovery rat

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  • Method for iron concentrate in ore grinding, coarse and fine separation, gravity-magnetic-flotation process tailings in recovery stage
  • Method for iron concentrate in ore grinding, coarse and fine separation, gravity-magnetic-flotation process tailings in recovery stage

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Embodiment Construction

[0025] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0026] Such as figure 1 Shown, the method for iron ore concentrate in recovery stage grinding, coarse and fine separation, heavy-magnetic-flotation process tailings of the present invention is characterized in that to poor hematite stage grinding, coarse and fine classification, gravity separation-magnetic separation- The comprehensive tailings in the flotation combined process are obtained by gravity separation and weak magnetic scavenging, and then ground to a particle size of -200 mesh with a content of more than 93%. Selection, concentration and three-stage sweeping recovery of magnetic ore in the tailings, specifically include the following steps:

[0027] 1) Feed the comprehensive tailings with a grade of 10% to 11% into the roughing spiral chute for gravity separation,

[0028] 2) The concentrate from the rougher spiral chute is f...

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Abstract

The invention relates to the technical field of re-election of lean hematite tailings, in particular to a method for iron concentrate in tailings in the recovery stage of grinding, coarse and fine separation, and gravity-magnetic-flotation process, which is characterized in that the lean hematite stage The comprehensive tailings in the combined process of ore grinding, coarse and fine classification, gravity separation-magnetic separation-flotation are obtained by gravity separation and weak magnetic sweeping. Roughing, beneficiation and three-stage scavenging of weak magnetic and strong magnetic-reverse flotation operations to recover magnetic ore in tailings. In the present invention, the comprehensive tailings are sorted by gravity separation and weak magnetic sweeping, and the rough concentrate with a grade of 27% to 31% is recovered, which reduces the processing capacity of subsequent grinding and sorting operations and improves the selection of subsequent operations Grade; regrind the coarse concentrate to dissociate the intergrowth in the coarse concentrate; use weak magnetic, strong magnetic-reverse flotation to sort the regrind coarse concentrate, and obtain the final grade of more than 66%. Concentrate, to reduce the comprehensive tailings grade by 1%, to achieve the effective use of resources.

Description

technical field [0001] The invention relates to the technical field of re-selection of lean hematite tailings, in particular to a method for recovering ore grinding, coarse and fine separation, and heavy-magnetic-flotation process tailings iron concentrate. Background technique [0002] At present, the lean iron ore resources mined and utilized are mainly hematite and magnetite. Since iron ore resources are non-renewable resources, in order to effectively utilize limited resources, extract valuable components in tailings and improve the recovery rate of resources , the research on improving the comprehensive utilization value of resources has started as early as the 1980s. [0003] For the recovery of lean hematite tailings obtained by "stage grinding, coarse and fine separation, and combined gravity-magnetism-flotation process", although many experimental studies have been carried out, due to the improvement of the level of mineral processing technology, the existing The p...

Claims

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Application Information

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IPC IPC(8): B03C1/30B03D1/14B07B13/00
Inventor 杨晓峰刘双安宋均利
Owner ANSTEEL GRP MINING CO LTD
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