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A process for recovering gold and sulfur from biological oxidation cyanidation tailings of gold concentrate

A technology of biological oxidation and cyanidation of tailings, applied in chemical instruments and methods, solid separation, flotation, etc., can solve the problem of difficulty in obtaining ideal indicators, and achieve excellent sorting effect, strong feasibility and simple pharmaceutical system. Effect

Active Publication Date: 2020-04-10
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For gold concentrate biological oxidation cyanide tailings, there is no reasonable and efficient sorting process at present, and it is difficult to obtain ideal indicators by conventional flotation process

Method used

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  • A process for recovering gold and sulfur from biological oxidation cyanidation tailings of gold concentrate
  • A process for recovering gold and sulfur from biological oxidation cyanidation tailings of gold concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Grind the gold concentrate biological oxidation cyanide tailings with a water content of 40%, the grinding fineness is -37μm, accounting for 90%, adding tap water to adjust the slurry to 15%, and feeding the slurry into the pretreatment and stirring bucket. Based on the amount of dry tailings, add 60% industrial sulfuric acid 8kg / t into the first pretreatment mixing tank, stir for 3 minutes, adjust the pH value of the slurry to 3, and then feed it into the second pretreatment mixing tank; Add 4kg / t of sodium carbonate with a purity of 99% to the pulp in the barrel, stir for 3 minutes, adjust the pH value of the pulp to 6, and feed the pulp into the rougher. Add 100g / t of butyl xanthate and 50g / t of butyl ammonium black medicine, stir for 3 minutes, add 50g / t of terpineol oil, stir for 2 minutes, and carry out rough separation. The first sweeping; selection does not add any chemicals, control the flotation concentration of 10%, the selected concentrate is gol...

Embodiment 2

[0035] Example 2: Grind the gold concentrate biological oxidation cyanide tailings with a water content of 40%, the grinding fineness is -37μm, accounting for 95%, adding tap water to adjust the slurry to 15%, and feeding the slurry into the pretreatment and stirring bucket. Based on the amount of dry tailings, add 60% industrial sulfuric acid 9kg / t to the first pretreatment mixing tank, stir for 3 minutes, adjust the pH value of the slurry to 2.5, and then feed it into the second pretreatment mixing tank; Add 6kg / t of sodium carbonate with a purity of 99% to the pulp in the barrel, stir for 3 minutes, adjust the pH value of the pulp to 6.5, and feed the pulp into the rougher. Add 120g / t of butyl xanthate and 60g / t of butyl ammonium black medicine, stir for 3 minutes, add 50g / t of terpineol oil, stir for 2 minutes, and carry out rough separation. The first sweeping; selection does not add any chemicals, control the flotation concentration of 10%, the selected concentrate is t...

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Abstract

The invention discloses a novel process for recovering gold and sulfur from gold concentrate biological oxidized cyanided tailings. The novel process comprises the steps that the gold concentrate biological oxidized cyanided tailings are reground until the grinding fineness is 37 [mu]m and accounted for 70-95%, and sulfuric acid pretreatment and sodium carbonate pretreatment are conducted to improve the floatability of gold-containing sulfur minerals; and then coarse selection, fine selection, scavenging closed-circuit flotation selection process are conducted, gold and sulfur are enriched andfloated, and the gold sulfur concentrate is obtained. The method of the novel process is adapted to the nature of the gold concentrate biological oxidized cyanided tailings, and the regrinding-pretreating-floating selection recovery process through has innovativeness, the medicament system is simple, the feasibility is high, and the separation effect is excellent; and by means of the method of the novel process, when the fineness of the gold concentrate biological oxidized cyanided tailings is 45 [mu]m and accounted for 90%, the gold content is 4.70 g / t, and sulfur is 20.73%, the mineral yield of gold sulfur concentrate is 43.48%, the gold content is 10.14 g / t, sulfur is 43.67%, the recovery rates of gold and sulfur are 93.41% and 99.67% correspondingly, and the recovery effect of gold and sulfur is excellent.

Description

technical field [0001] The invention relates to a process for recovering gold and sulfur from the tailings of gold concentrate biological oxidation cyanide, which is especially suitable for the comprehensive recovery and utilization of valuable elements gold and sulfur in the gold concentrate biological oxidation cyanide tailings. Background technique [0002] The gold-carrying minerals in the cyanidation tailings of gold concentrate biooxidation are mainly pyrite. After the pyrite is oxidized, the surface properties change, the surface becomes rough, and micro-cracks and honeycomb pores appear. After the biooxidation of gold concentrate, it needs to be neutralized with lime before cyanidation. Adjust the pH to 9-10 for cyanidation. During the neutralization process, a large amount of sulfate will be precipitated on the surface and cracks of the pyrite, which will make the pyrite The buoyancy of mines is reduced. The fineness of gold concentrate after biological oxidation a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B1/00B03D1/018B03D103/02
Inventor 闫军宁郑锡联岳丽琴鲁军
Owner 厦门紫金矿冶技术有限公司