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Beneficiation method to increase production indexes of carbonaceous gold ore and reduce influence of production backwater upon production indexes

A technology of production index and beneficiation method, applied in flotation, solid separation and other directions, can solve the problems of large influence of flotation process and flotation index, high turbidity of production backwater, and inability to obtain results, so as to reduce influence and improve beneficiation index and the effect of improving economic benefits

Active Publication Date: 2018-11-30
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The reason why carbon-containing gold ore is a refractory ore is that carbon has a great influence on the flotation process and flotation indicators, and decarbonization by flotation often cannot achieve ideal results
When carbon is removed by flotation, in addition to carbon entering the flotation foam, some gold is also likely to enter the flotation foam together, resulting in gold loss
In addition to the impact of carbon on the indicators in the production practice of carbon-containing gold mines, there are still some other problems, such as: the specific gravity of carbon is relatively light, and it is easy to enter the production backwater, which makes the production backwater turbidity higher. lower, on the other hand carbon enters the return water and deteriorates the whole flotation system

Method used

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  • Beneficiation method to increase production indexes of carbonaceous gold ore and reduce influence of production backwater upon production indexes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A carbon-bearing gold mine in Gansu, the gold grade is 5.43g / t, carbon-containing, low-sulfide carbonate-type gold ore, the concentration of the grinding slurry is 70%, and the ore is ground with production return water (solid content: 7%). Add sodium hydroxide in an amount of 2000g / t, water purifier MFA in an amount of 2000g / t, and the content of grinding fineness less than 0.044mm is 70%.

[0016] Adjust the concentration of the grinding pulp to 35%, add the activator copper sulfate, the dosage is 200g / t, add the collector butyl xanthate, the dosage is 500g / t, the foaming agent J-622, the dosage is 250g / t, the output Gold concentrate 1 and rougher tailings are produced.

[0017] Add water purifying agent MFA1000g / t to the roughing tailings, regrind fineness less than 0.044mm, the content is 95%, and the pulp concentration after regrinding is 50%

[0018] Adjust the concentration of regrinding pulp to 30%, add copper sulfate to 100g / t, butyl xanthate to 150g / t, and J-...

Embodiment 2

[0021] A carbon-bearing gold mine in Gansu, the gold grade is 5.65g / t, the concentration of the grinding slurry is 65%, the overflow of the thickener (solid content is 8.0%) is used for grinding, and the dosage of sodium hydroxide is 1500g / t. Water agent MFA, the dosage is 3000g / t, the grinding fineness is less than 0.044mm and the content is 65%.

[0022] Adjust the concentration of the grinding pulp to 35%, add the activator copper sulfate, the dosage is 200g / t, add the collector butyl xanthate, the dosage is 600g / t, the foaming agent J-622, the dosage is 280g / t, the output Gold concentrate 1 and rougher tailings are produced.

[0023] The water purifier MFA1200g / t is added to the roughing tailings, the regrinding fineness is less than 0.044mm, the content is 96%, and the pulp concentration after regrinding is 48%

[0024] Adjust the concentration of regrinding pulp to 33%, add copper sulfate to 150g / t, butyl xanthate to 180g / t, J-622 to 160g / t, carry out roughing and sweep...

Embodiment 3

[0027] A carbon-bearing gold mine in Xinjiang, the gold grade is 4.47g / t, which belongs to carbon-bearing gold ore, the concentration of the grinding slurry is 60%, the ore is ground with production return water (solid content is 6.5%), and sodium hydroxide is added, and the dosage is 2500g / t, water purifying agent MFA, the dosage is 1500g / t, the grinding fineness is less than 0.044mm and the content is 72%.

[0028] Adjust the concentration of the grinding pulp to 38%, add the activator copper sulfate, the dosage is 220g / t, add the collector butyl xanthate, the dosage is 400g / t, the foaming agent J-622, the dosage is 200g / t, the output Gold concentrate 1 and rougher tailings are produced.

[0029] The water purifier MFA800g / t is added to the roughing tailings, the regrinding fineness is less than 0.044mm, the content is 97%, and the pulp concentration after regrinding is 46%

[0030] Adjust the concentration of regrinding pulp to 35%, add copper sulfate to 80g / t, butyl xanth...

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Abstract

The invention discloses a beneficiation method to increase production indexes of carbonaceous gold ore and reduce influence of production backwater upon production indexes and belongs to the technicalfield of ore processing. The beneficiation method herein includes: performing wet grinding, adding the conditioner, sodium hydroxide, and the water purifier MFA, and performing pulping; adjusting post-grinding pulp to suitable concentration, adding an activator, a collector and a foamer to carry out quick floatation so as to obtain gold concentrate 1 and coarse tailings; adding the water purifierMFA to grind the coarse tailings again, and performing secondary floatation to obtain gold concentrate 2 and tailings, wherein the gold concentrate 1 and gold concentrate are used as qualified finished gold concentrate. The beneficiation method herein has the advantages that part of high-grade gold ore are beneficiated early and fast through quick floatation, the circulation quantity of middlingsis reduced, and the gold core can be maximally recycled during floatation; the beneficiation method has good technical flow and high applicability, the influence of backwater upon production indexesis relieved, and gold recovery rate is increased.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a beneficiation method for improving the production index of carbon-containing gold ore and reducing the influence of production backwater on the production index. Background technique [0002] The reason why carbon-containing gold ore is a refractory ore is that carbon has a great influence on the flotation process and flotation indicators, and decarbonization by flotation often cannot achieve ideal results. When carbon is removed by flotation, in addition to carbon entering the flotation foam, some gold is also likely to enter the flotation foam together, resulting in gold loss. In addition to the influence of carbon on the indicators in the production practice of carbon-containing gold mines, there are still some other problems, such as: the specific gravity of carbon is relatively light, and it is easy to enter the production backwater, which makes the production b...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/018B03D101/06B03D103/02
CPCB03D1/018B03D1/02B03D2201/06B03D2203/025
Inventor 孙运礼郭艳华杨俊龙柏亚林李国栋彭贵熊廖雪珍姜永智彭建城
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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