Method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings

A flotation tailings and flotation technology, applied in flotation, solid separation and other directions, can solve the problems of high gold recovery rate, difficult industrialization implementation, and high cost, achieve high gold recovery rate, significant environmental benefits, and improve gold recovery. rate effect

Active Publication Date: 2017-03-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Li Haoran and others invented a method for pretreatment of gold-containing tailings or cyanide leaching slag for desiliconization and gold leaching. First, lye is used to leach silicon in gold-containing tailings or cyanide leaching slag in two stages under high temperature and high pressure conditions. The filtrate is made into sodium silicate

Method used

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  • Method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The flotation tailings of an antimony-containing gold ore in Guizhou were selected. The tailings contained 0.7g / t gold, 1.6% sulfur, 0.29% antimony, 0.92% arsenic, 1.02% carbon, and 5.8% iron; the tailings were directly leached with cyanide on site , but the gold content in the final leaching residue reaches 0.2g / t~0.4g / t, and the gold loss is serious.

[0028] Take the flotation tailings and get +0.038mm coarse-grained products and -0.038mm fine-grained products after hydrocyclone classification, and the content percentage of +0.038mm coarse-grained products after grinding to make the particle size less than 0.074mm 85%, then adjust the pulp concentration to 31%; according to each ton of tailings, add activator copper sulfate 200g / t, lead nitrate 200g / t, ammonium bicarbonate 100g / t, collector butyl xanthate 60g / t and butylamine black drug 40g / t, foaming agent No. 2 oil 30g / t, after pulping, carry out flotation roughing I to obtain flotation roughing I concentrate and ...

Embodiment 2

[0031] The flotation tailings of a complex antimony-bearing gold mine in Gansu were selected. The flotation tailings contained 1.2g / t gold, 1.89% sulfur, 0.83% antimony, 0.94% carbon, and 28.4% silicon dioxide. The treatment process of on-site flotation tailings is direct cyanidation leaching, but the gold content in the leaching residue reaches 0.6g / t~0.8g / t.

[0032] Take the flotation tailings, and obtain +0.038mm coarse-grained products and -0.038mm fine-grained products after hydrocyclone classification, and the +0.038mm coarse-grained products are regrinded so that the weight percentage of the particle size is less than 0.074mm. 88%, then adjust the pulp concentration to 30%; according to each ton of tailings, add activator copper sulfate 150g / t, lead nitrate 150g / t and ammonium bicarbonate 150g / t, collector butyl xanthate 60g / t t and butylamine black drug 30g / t, foaming agent No. 2 oil 40g / t, carry out flotation roughing I to obtain flotation roughing I concentrate and ...

Embodiment 3

[0035] The ore sample was taken from the flotation tailings of an antimony-bearing gold mine in Yunnan. The tailings contained 0.6g / t gold, 14.6g / t silver, 1.6% sulfur, and 0.1% antimony. The flotation tailings on site also used direct cyanidation Gold and silver are recovered by leaching, but the gold content in the leaching residue reaches 0.2g / t.

[0036] Take the flotation tailings and obtain +0.038mm coarse-grained products and -0.038mm fine-grained products after hydrocyclone classification. 90%, then add water to adjust the slurry concentration to 28%; according to each ton of tailings, add activator copper sulfate 200g / t, lead nitrate 200g / t and ammonium bicarbonate 100g / t, collector butyl xanthate 60g / t and butylamine black drug 40g / t, foaming agent No. 2 oil 40g / t, carry out flotation roughing I to obtain flotation roughing I concentrate and flotation roughing I tailings, flotation roughing Add collector butyl xanthate 30g / t, butylamine black powder 20g / t, foaming ...

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Abstract

The invention discloses a method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings. By the adoption of the method, the technical problem that if the antimony-containing gold ore flotation tailings are subjected to cyanide leaching directly, the cost is high, and the gold recovery rate is low is solved. Meanwhile, efficient recovery of associated antimony minerals can also be achieved. The method is characterized by comprising the steps that the tailings are rated, the tailings with the particle size being larger than 0.038 mm are subjected to regrinding and size mixing, copper sulfate, lead nitrate and ammonia carbonate are added sequentially as a mixed activating agent, sodium n-butylxanthate and ammonium butyl aerofloat serve as a collecting agent, No.2 oil serves as a foaming agent, and gold and the antimony minerals are recycled through flotation; and water is directly added into the tailings with the particle size being smaller than 0.038 mm for size mixing, grinding is not needed, sodium hexametaphosphate, copper sulfate, lead nitrate, ammonia carbonate, sodium n-butylxanthate, No.25 aerofloat, kerosene (or diesel oil) and No.2 oil are added in sequence, wherein the sodium hexametaphosphate serves a dispersing agent, the copper sulfate, lead nitrate and ammonia carbonate serve as an activating agent, the n-butylxanthate and No.25 aerofloat serve as a collecting agent, the kerosene (or diesel oil) serves an emulsifying agent, and the No.2 oil serves as a foaming agent, and gold and the micro-fine particle antimony minerals are recycled through flotation. The technique is reasonable, procedures are simple, the gold and antimony recovery rate is high, and industrialized implementation is easy.

Description

technical field [0001] The invention belongs to the field of mineral processing, and relates to a method for recovering gold and fine-grained antimony minerals in the flotation tailings of antimony-containing gold mines, which helps to strengthen the recovery of gold and fine-grained antimony minerals in the tailings, and improves the recovery rate of gold. Reduce tailings leaching costs. Background technique [0002] The cyanidation gold extraction process has become the most widely used gold extraction process and method because of its low cost, high gold recovery rate, simple process flow and operating conditions. Metallurgical ore resources are decreasing year by year. According to statistics, about 60% to 70% of the gold resources in the world are complex and refractory gold mines, but the utilization degree of this part of gold resources is still relatively low. [0003] The combined dressing and metallurgy process is currently the most commonly used method for proce...

Claims

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Application Information

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IPC IPC(8): B03B9/06B03D1/014B03D101/02B03D103/02
CPCB03B9/06B03D1/014B03D2201/02B03D2203/025
Inventor 童雄杨波谢贤
Owner KUNMING UNIV OF SCI & TECH
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