Ore dressing method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailing

A technology for waste tailings and beneficiation methods, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of poor selectivity of metal minerals and difficulty in recycling.

Active Publication Date: 2014-12-24
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the abandoned tailings that have been stored for a long time are severely weathered and ...

Method used

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  • Ore dressing method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailing
  • Ore dressing method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailing
  • Ore dressing method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailing

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1: Firstly, the waste tailings are wet-screened with a trommel screen to remove larger pieces of gravel with a particle size of more than 2 mm. The material under the screen is fed into the mixing tank for slurry adjustment and then enters the cyclone for classification. The cyclone is classified. The returned sand is fed into the ball mill for grinding, and the ball mill is discharged and then returned to the mixing tank. According to the dry weight of waste tailings per ton, add 500g / t of calcium oxide, 1000g / t of zinc sulfate, 250g / t of water glass and 250g / t of sodium hexametaphosphate into the ball mill. The graded overflow of the cyclone with a grinding fineness of -0.038mm accounting for 90% is fed to another stirring tank, and the amount of ethyl xanthate 60g / t and the amount of ethyl diazepam 60g / t are sequentially added to the stirring tank. t and 30g / t of pine alcohol oil to adjust the pulp, so that the pH value of the pulp is 7.5-8.5, f...

Embodiment 2

[0015] Embodiment 2: according to figure 1 The embodiment of the technological process of the present invention, the test steps, process parameters, and medicament system are exactly the same as those in Example 1. The result of the embodiment of the present invention is shown in Table 1. Show by the result shown in table 1, adopt the inventive method, the beneficiation index that embodiment 1 obtains is: gold concentrate grade 27.14g / t, gold recovery rate 86.28%, zinc concentrate grade 51.92%, zinc recovery rate 85.81%, The sulfur concentrate grade is 43.22%, the sulfur recovery rate is 61.52%, the iron concentrate grade is 65.92%, and the iron recovery rate is 41.68%. Example 2 Mineral processing indicators: gold concentrate grade 27.07g / t, gold recovery rate 87.29%, zinc concentrate grade 51.08%, zinc recovery rate 87.29%, sulfur concentrate grade 44.30%, sulfur recovery rate 63.74%, iron concentrate The grade is 66.77%, and the iron recovery rate is 42.08%. It can b...

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Abstract

The invention relates to an ore dressing method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailings. By grinding the abandoned tailings, useful mineral monomer dissociation is realized, and simultaneously mineral surface oxide films are stripped off to improve mineral floatation activity; by jointly using water glass and sodium hexametaphoshpate to effectively inhibit iron gangue, silicon gangue and carbonate gangue, fine silt can be better dispersed and the adverse influence of mineral silt on floatation can be eliminated; through the high-efficiency combination and reasonable matching of inhibitors, collectors and activators, the sequentially prior floatation of gold, zinc and sulfur is realized, then iron is recovered by adopting a low-intensity magnetic separation process, and thus gold concentrate, zinc concentrate, sulfur concentrate and iron concentrate are obtained. Through mineral grinding activation and floatation and reasonable fitting and matching of floatation chemicals, the method solves the problem that the floatation activity is poor due to the oxide film on surfaces of useful minerals in the abandoned tailings, and can be used for effectively separating and extracting gold, zinc and sulfur components in the abandoned tailings.

Description

1. Technical field [0001] The invention relates to the smelting industry, in particular to a beneficiation method for comprehensive utilization of tailings, in particular to a beneficiation method for comprehensively recovering gold, zinc, sulfur and iron from abandoned tailings. 2. Background technology [0002] my country's mining industry started late, technology development is unbalanced, dressing and smelting technology varies greatly in different periods, and a large amount of valuable resources remain in tailings. If these tailings resources cannot be comprehensively recycled, it will cause huge waste. Complex gold-bearing polymetallic ores have complex types of ores and many associated components. The complex and associated components of the ores increase the difficulty of the enterprise's dressing and smelting production technology. Due to the limitations of production technology and technology, most enterprises have insufficient comprehensive utilization of co-ass...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/00B02C17/10B03D1/00B03D1/002
Inventor 鲁军廖德华吴双桥李广田树国温建
Owner ZIJIN MINING GROUP
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