Repeated stratifying, zoning-screening gravity concentration method

A screening and banding technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve problems such as low recovery rate, poor gravity separation effect, low concentrate grade, etc., to achieve high recovery rate, Reduced potential energy difference and high concentrate grade

Active Publication Date: 2017-08-01
SHENZHEN NONFEMET TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when dealing with some minerals with many components and fine particle size, the effect of gravity separation is poor, or the recovery rate is low, or the grade of concentrate is low, etc.

Method used

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  • Repeated stratifying, zoning-screening gravity concentration method
  • Repeated stratifying, zoning-screening gravity concentration method
  • Repeated stratifying, zoning-screening gravity concentration method

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Experimental program
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Embodiment Construction

[0029] The preferred embodiments of the present invention will be further described in detail below.

[0030] A lead-zinc mine, raw ore analysis results:

[0031] Galena 1.74%, sphalerite 6.46%, pyrite 14.67%, barite (barium sulfate) 26.01%, dolomite 43.48%, others (a small amount of quartz, barium-containing feldspar, muscovite, etc.) 7.64%. There are no less than 5 kinds of mineral components. The minerals for beneficiation are galena and sphalerite, and the secondary minerals are barite. The embedded particle size of galena and sphalerite is uneven, and the embedded particle size of galena is smaller than that of sphalerite. The proportion of fine particles smaller than 0.02mm in galena is 21.26%, and that of sphalerite is smaller than 0.02mm. The proportion of fine particles is 13.62%. This mineral is a typical multi-component mineral with fine grain size.

[0032] The beneficiation process is as figure 1 As shown, after the minerals are crushed and fully dissociated, ...

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Abstract

The invention provides a repeated stratifying, zoning-screening gravity concentration method. The gravity concentration method comprises the steps of minerals are ground; and the ground minerals are sorted by adopting gravity concentration equipment and are orderly discharged according to the same settling speed at the discharge end of the gravity concentration equipment, and the discharged materials are equally divided into n parts at the discharging end along a discharging belt, wherein n is not less than 4, and the n parts of the discharged materials are screened respectively so as to obtain high-grade concentrates, middlings and tailings. According to the gravity concentration method, by the adoption of the technical scheme, the concentrate grade can be high, the recovery rate can be high, operation can be convenient, and the conventional gravity concentration equipment can be used; and compared with screening and grading of the minerals without being subjected to gravity concentration treatment, the gravity concentration method has the advantage that the screening efficiency is higher by 30-70%.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a re-selection method of multiple layering, banding-screening. Background technique [0002] The current mineral processing will adopt the method of gravity separation. Gravity separation is a mineral processing method that uses the density difference between useful ore and gangue to achieve separation. The difficulty depends on the density difference between light and heavy minerals. , and the particle size also has a greater impact. The main types of gravity separation process are: classification, jigging, shaker separation, chute separation, centrifugal separation, spiral separation, etc. Reselection can be divided into three parts: preparation operation, sorting operation and product processing operation. Preparatory operations include: crushing and grinding, washing and desliming, screening or hydraulic classification, etc. Product handling operations mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 陈端云李清湘李宗良李宗奇刘惺姚曙伏志宏白薇肖义亮陈云鹏向红印李璇郑瑞火刘县珍苏敏
Owner SHENZHEN NONFEMET TECH
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