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A method for improving the recovery rate of sulfur and gold in the tailings of old tailings ponds

A technology of tailings storage and recovery rate, applied in solid separation, flotation, etc., can solve the problems of high cost of flotation reagents and low recovery rate, and achieve the effects of reducing reagent costs, improving recovery rate, and saving resources

Active Publication Date: 2018-09-28
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low recovery rate and high cost of flotation reagents in the above-mentioned prior art, the present invention provides a method for improving the recovery rate of sulfur gold in the tailings of old tailings ponds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for improving the recovery rate of sulfur and gold in the tailings of old tailing ponds, specifically comprising the following steps:

[0013] A. Preparation of flotation pulp: Pour the tailings (sample) of an old tailing pond over 20 years into a plastic container, add water to make the pulp concentration 33%, stir evenly, and let it stand wet and soak for 24 hours to obtain Flotation pulp;

[0014] B. Aeration and stirring in the redox system: transfer the soaked flotation pulp from the plastic container to the tank of the inflatable flotation machine, add sodium sulfide solution to the flotation pulp, the dosage is 50 g / ton Sample, the mass concentration of sodium sulfide solution is 10%, the pulp in the flotation tank is aerated and stirred, the stirring time is 30 minutes, the impeller speed is 1800r / min, and the aeration volume is 1.2m 3 / h;

[0015] C. Sulfur-gold mineral flotation: add copper sulfate solution to the pulp flotation tank after inflating...

Embodiment 2

[0025] A method for improving the recovery rate of sulfur and gold in the tailings of old tailing ponds, specifically comprising the following steps:

[0026] A. Flotation pulp preparation: Pour the tailings (sample) of an old tailing pond over 40 years into a plastic container, add water to make the pulp mass concentration 33%, stir evenly, let stand wet and soak for 24 hours to obtain Flotation pulp;

[0027] B. Aeration and stirring in the redox system: transfer the soaked flotation pulp from the plastic container to the tank of the inflatable flotation machine, add sodium sulfide solution to the flotation pulp, the dosage is 100 g / ton Sample, the mass concentration of sodium sulfide solution is 10%, the pulp in the flotation tank is aerated and stirred, the stirring time is 40 minutes, the impeller speed is 2000r / min, and the aeration volume is 1.5m 3 / h;

[0028] C. Sulfur-gold mineral flotation: add copper sulfate solution to the pulp flotation tank after inflating and...

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Abstract

The invention discloses a method for increasing a sulfur-gold recovery rate in tailings of an old tailing pond. The method comprises the following steps: preparing flotation pulp, inflating and stirring in an oxidation and reduction system, floating sulfur-gold ores and the like. According to the method disclosed by the invention, an ore pulp preparation method adopting a wetting and soaking mode is adopted, so that poor flotation effect due to the fact that a sample and water are not mixed uniformly is avoided; by adopting an inflating and strong-stirring method of the oxidation and reduction system, so that surfaces of ores are reduced in the oxidation and reduction system formed after sodium sulfide inflation; and by virtue of strong stirring, ore grains scrub with one another to expose fresh surfaces of sulfur-gold ores, so that the problem that the sulfur-gold recovery rate in tailings of the old tailing pond is low due to the fact that the sulfur-gold ores are not liable to float in a direct flotation or activation flotation method is effectively solved, and therefore, the recovery rate for sulfur-gold in tailings of the old tailing pond is greatly increased, reagent cost is reduced and resources are saved.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation technology, relates to the tailings of old tailing ponds, and in particular to a method for improving the recovery rate of sulfur and gold in the tailings of old tailing ponds. Background technique [0002] The tailings of common old tailings ponds have two characteristics: firstly, the valuable metal elements in the tailings of old tailings ponds are of low grade, complex and difficult to separate, and the accumulation time is long, and the degree of peroxidation on the mineral surface is high; secondly, the old tailings The precious metals in the tailings of the reservoir are mostly associated metals, and the main gold-bearing minerals are mostly pyrite and chalcopyrite. If the traditional copper sulfate activation-direct flotation method and Nelson beneficiation technology are used, the recovery rate of sulfur gold is not high, and the specific performances are: 1. The flotation speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00
CPCB03B1/00B03D1/00
Inventor 孙运礼王李鹏任琳珠何海涛袁艳李福兰姜永智王志丰杨俊龙苗培
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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