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Method and device for recovering gold in tailings

A technology for recovering gold and tailings, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of tailings unfavorable environment protection, reduction of economic benefits of mineral processing, and low benefit of mineral processing, etc., to achieve gold ore It can be clearly separated from the tailings, improve the reuse rate, and reduce the number of shakers

Active Publication Date: 2019-01-11
YUXI DAHONGSHAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Dahongshan iron tailings iron ore is complex and fine in nature, contains a small amount of gold ore, a considerable part of the gold is wrapped by pyrite and quartz, and the gold grade is 0.02g / t, which has the advantages of large quantity, low cost, fine particle size and high availability However, in the utilization process of mineral resources, these resources have not been well utilized, which reduces the economic benefits of mineral processing, and also causes huge pollution to the environment. The benefit of beneficiation of metal particles is not great. On the one hand, it comes from the nature of the ore itself, that is, part of the gold is wrapped. If it is not finely ground, the gold is difficult to dissociate and cannot be recovered; The fineness of the ore grinding is artificially insufficient, so that part of the gold is lost in the tailings, and the accumulation of the tailings is not conducive to the protection of the environment. Therefore, it is necessary to develop a method and device for effectively improving the recovery of gold from the tailings.

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  • Method and device for recovering gold in tailings

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Experimental program
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Embodiment 1

[0033] A method for recovering gold from tailings, comprising the following steps:

[0034] A. Tailings treatment: The gold-bearing tailings are transported to the spiral chute through the slurry pump, the concentration of the slurry is 15%, and the true specific gravity of the tailings is 2.84t / m 3 ;

[0035] The gold-bearing tailings are Dahongshan gold-bearing iron tailings, and the components of the tailings include ore minerals and gangue minerals. Ore minerals include: (1) Hematite, the main ore mineral in the ore sample, with a content of 14.6%, most of which are broken particles dissociated from monomers, angular and irregular, and a few are associated or wrapped with quartz and feldspar In quartz feldspar; (2) Magnetite, with a content of 0.3%, is basically a broken particle dissociated from a monomer, and some of them are associated with quartz and feldspar. Gangue minerals include: (1) feldspar and quartz, with a content of 25%. The main gangue minerals in the ore...

Embodiment 2

[0041] A method for recovering gold from tailings, comprising the following steps:

[0042] A. Tailings treatment: The gold-bearing tailings are transported to the spiral chute through the slurry pump, the concentration of the slurry is 10%, and the true specific gravity of the tailings is 2t / m 3 ;

[0043] The gold-bearing tailings are iron tailings, and its composition includes 14% hematite, 0.2% magnetite, 0.05% pyrite, 25% feldspar quartz, 8% chlorite, and 6% dolomite , Apatite 3%. Among the gold-bearing tailings, those with a particle size of 0.005-0.019mm accounted for 15% of the total tailings content, those with a particle size of 0.019-0.037mm accounted for 20% of the total tailings content, and those with a particle size of 0.037-0.074mm accounted for 15% of the total tailings content. 30% of the ore content, and 35% of the total tailings content with a particle size of 0.074~0.147mm.

[0044] B, spiral chute separation: the gold-containing tailings are separated ...

Embodiment 3

[0048] A method for recovering gold from tailings, comprising the following steps:

[0049] A. Tailings treatment: The gold-bearing tailings are transported to the spiral chute through the slurry pump, the concentration of the slurry is 20%, and the true specific gravity of the tailings is 3t / m 3 ;

[0050] The gold-containing tailings are iron tailings, and its composition includes 16% hematite, 0.4% magnetite, 0.15% pyrite, 30% feldspar quartz, 10% chlorite, 8% dolomite, Apatite 5%. Among the gold-bearing tailings, those with a particle size of 0.005-0.019mm accounted for 22% of the total tailings content, those with a particle size of 0.019-0.037mm accounted for 25% of the total tailings content, and those with a particle size of 0.037-0.074mm accounted for 25% of the total tailings content. 25% of the ore content, and 28% of the total tailings content with a particle size of 0.074~0.147mm.

[0051] B. Spiral chute separation: the gold-containing tailings are separated i...

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Abstract

The invention discloses a method and a device for recovering gold in tailings. The method comprises the following steps: A, disposal of the tailings: conveying the gold-containing tailings to a spiralchute through a slurry pump, wherein the concentration of ore pulp reaches 10-20% and the true specific gravity of the tailings reaches 2-3 t / m<3>; B, separation in the spiral chute: subjecting the gold-containing tailings to centrifugal vibration separation in the spiral chute, so as to obtain rough concentrates and rough tailings; and C, separation on a shaking bed: putting the rough concentrates obtained through separation in the spiral chute on the shaking bed, and then subjecting the rough concentrates to separation on the shaking bed, so as to obtain gold concentrates and fine tailings.According to the method disclosed by the invention, the spiral chute is adopted for rough separation, so that the separation efficiency can be improved; then, the shaking bed is adopted for further fine separation, so that gold ores and the tailings can be obviously zoned, and the more remarkable separation effect can be achieved; compared with other methods, the method has the advantage that thecontent of the extracted gold concentrates is higher; the advantage and the disadvantage of the spiral chute and those of the shaking bed can be complementary; the cost can be reduced; the technological process can be shortened; the operation can be easy; and the function of environmental protection can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method and a device for recovering gold from tailings. Background technique [0002] Dahongshan iron tailings iron ore is complex and fine in nature, contains a small amount of gold ore, a considerable part of the gold is wrapped by pyrite and quartz, and the gold grade is 0.02g / t, which has the advantages of large quantity, low cost, fine particle size and high availability However, in the utilization process of mineral resources, these resources have not been well utilized, which reduces the economic benefits of mineral processing, and also causes huge pollution to the environment. The benefit of beneficiation of metal particles is not great. On the one hand, it comes from the nature of the ore itself, that is, part of the gold is wrapped. If it is not finely ground, the gold is difficult to dissociate and cannot be recovered; Large, the fineness of gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B5/04B03B5/62
CPCB03B5/04B03B5/626B03B9/00
Inventor 刘洋蔡正鹏臧超雷干正林李泉星黄丹杨天明李雪梅
Owner YUXI DAHONGSHAN MINING