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A magnetite beneficiation process for improving coarse-grained tailings content and mill processing capacity

A processing capacity, coarse-grained technology, applied in the field of magnetite beneficiation process, magnetite ore beneficiation process, can solve the problems of increasing operating costs, difficulty in mining and filling balance, difficulty in improving processing capacity, etc.

Active Publication Date: 2020-02-11
安徽马钢张庄矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the tailings obtained by conventional magnetite beneficiation technology are all fine-grained tailings, and only part of the tailings can be filled underground, and most of the tailings still need to be discharged into the tailings pond, making it difficult to achieve a balance between mining and filling
The magnetite beneficiation technology generally adopts the stage grinding-weak magnetic separation process, which is difficult to improve the processing capacity and reduce the operating cost in the existing process; Grinding for ineffective grinding, increasing operating costs

Method used

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  • A magnetite beneficiation process for improving coarse-grained tailings content and mill processing capacity
  • A magnetite beneficiation process for improving coarse-grained tailings content and mill processing capacity

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Embodiment Construction

[0017] First of all, it should be noted that the characteristics and advantages of the magnetite beneficiation process of the present invention will be described in detail below by way of example, but all descriptions are only for illustration, and should not be interpreted as an explanation of the present invention. Invention forms no limitations.

[0018] A magnetite beneficiation plant in Huoqiu, Anhui adopts such figure 1 and figure 2 The beneficiation process shown has an annual ore processing scale of 5 million tons per year. The specific process is as follows: the belt 1 sends the raw magnet ore into the ball mill-2 for a stage of ball milling, and then sends it to the magnetic separator-3 for a stage of magnetic separation to obtain the concentrate 1 and tailings 1; the tailings 1 is sent to the high-frequency fine A section of screening is carried out in the sieve 4 to obtain the upper sieve material 1 and the lower sieve material 1, the upper sieve material 1 is a...

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Abstract

The invention discloses a magnetite separation technology for increasing the content of coarse-grained tailings and improving the processing capability of a mill. The magnetite separation technology comprises the steps that magnetite is sequentially subjected to first-section ball milling, first-section magnetic separation, first-section classification, second-section magnetic separation, second-section screening, third-section magnetic separation and fourth-section magnetic separation, and iron ore concentrate is obtained; oversize materials obtained through first-section screening of tailings obtained after first-section magnetic separation is taken as building sands; and concentrate obtained through second-section classification, second-section ball milling and fifth-section magnetic separation of oversize materials obtained after second-section screening is fed into second-section classification and overflows in the second-section classification process to be fed into third-sectionmagnetic separation. According to the magnetite separation technology, first-section coarse-grained magnetic separation tailings are screened to obtain tailings with the particle size larger than 0.3mm, therefore, the content of fine-grained tailings is decreased, mining-filling equilibrium is achieved, and the tailings can be taken as the building sand; first-section magnetic separation coarseconcentrate is directly screened and subjected to magnetic separation to obtain qualified iron ore concentrate product in advance, second-section fine-ground invalid ground ore is reduced, and the production efficiency is improved; and magnetic separation tailing discarding is conducted on second-section ball milling discharged ore, the second-section classification feeding capacity and the second-section ball milling sand return capacity are decreased, and the second-section ball milling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ore dressing, and relates to a magnetite ore beneficiation process, in particular to a magnetite ore beneficiation process for improving the content of coarse-grained tailings and the processing capacity of a mill. Background technique [0002] The tailings pond is a high potential energy man-made debris flow hazard, and there is a danger of dam failure. Once the accident occurs, it is easy to cause serious accidents. The beneficiation method for the recovery of magnetite resources generally adopts the stage grinding-weak magnetic separation process. Based on the beneficiation principle of early throwing and early throwing, the content of coarse-grained ore in tailings is increased while saving energy and consumption, and the fine-grained tailings are reduced. Quantification, so as to achieve the balance of mining and charging. However, at present, the tailings obtained by conventional magnetite benefici...

Claims

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Application Information

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IPC IPC(8): B02C23/08B03C1/00B07B1/28B02C15/00
CPCB02C15/00B02C23/08B03C1/00B07B1/28
Inventor 张华肖金雄龙艳陈五九石云良齐美超柯佳焱余剑赵睿陈伟李保健
Owner 安徽马钢张庄矿业有限责任公司
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