Recovery method of gold

A recovery method and technology of gold ore, applied in the field of recovery, can solve the problems of Carlin-type gold ore flotation without obvious effect, difficult to meet industrial production requirements, low gold concentrate grade and recovery rate, etc., and achieve stable separation index , improve grade, sorting index and effect

Inactive Publication Date: 2015-04-08
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of gold ore has more clay minerals and carbonaceous minerals, and the content of primary slime is relatively large, and it is easy to produce a large amount of secondary slime during the grinding process, which affects the flotation effect
During flotation, it is necessary to remove the slime in advance, and then carry out flotation, but the conventional flotation method has no obvious effect on the flotation of Carlin-type gold ore, and the grade and recovery rate of the gold concentrate obtained are low, which is difficult Meet industrial production requirements

Method used

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  • Recovery method of gold

Examples

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example 1

[0039]A Carlin-type gold ore, the raw ore contains 3.60g / t gold and 1.59% carbon, when the grinding is at -0.074mm and the percentage is 95%:

[0040] Carboxymethyl cellulose (CMC), sodium silicate and sodium carbonate are used as inhibitors, and three roughing procedures are used, the first roughing is followed by selection, the second roughing and the third roughing After merging, it is selected and finally combined with the concentrate obtained in the first roughing to obtain gold.

[0041] The amount of carboxymethyl cellulose (CMC) in the first roughing selection is 900g / t 原矿石 , Sodium silicate dosage 1800g / t 原矿石 , Sodium carbonate dosage 1500g / t 原矿石 ;

[0042] The dosage of carboxymethyl cellulose (CMC) in the second roughing is 100g / t 原矿石 ;

[0043] No inhibitor was added for the third roughing.

[0044] Gold concentrate with a gold grade of 24.61g / t and a gold recovery rate of 80.42% can be obtained by flotation. The gold grade of the gold concentrate obtained b...

example 2

[0046] A certain Carlin-type gold ore contains 3.81g / t of gold and 1.05% of carbon. When the grinding is at -0.074mm and the percentage is 93%, carboxymethyl cellulose (CMC) and sodium carbonate are used as inhibitors. Two roughing processes are adopted, the first roughing and then separate selection, the second roughing and then separate selection, and finally the concentrate is combined.

[0047] The amount of carboxymethyl cellulose (CMC) in the first rough selection is 1000g / t 原矿石 , Sodium carbonate dosage 2000g / t 原矿石 ; The dosage of carboxymethyl cellulose (CMC) in the second rough selection is 100g / t 原矿石 .

[0048] Gold concentrate with gold grade of 24.85g / t and gold recovery rate of 81.15% can be obtained by flotation. The gold grade of the gold concentrate obtained by the conventional flotation method is 17.00g / t~18.50g / t, and the gold recovery rate is 45.00%~62.74%.

example 3

[0050] A Carlin-type gold ore, the raw ore contains 3.55g / t gold and 1.25% carbon, and when the grinding is at -0.074mm and accounts for 95% of the percentage, carboxymethyl cellulose (CMC) is used as an inhibitor.

[0051] Three roughing processes are adopted, the first roughing is selected separately, the second roughing and the third roughing are combined and then selected, and the concentrate is finally combined. The amount of carboxymethyl cellulose (CMC) in the first rough selection is 800g / t 原矿石 ; The second rough selection of carboxymethyl cellulose (CMC) consumption 120g / t 原矿石 ; No inhibitor was added for the third roughing. Gold concentrate with gold grade of 24.12g / t and gold recovery rate of 80.86% can be obtained by flotation. The gold grade of the gold concentrate obtained by the conventional flotation method is 16.40g / t~17.80g / t, and the gold recovery rate is 40.60%~65.30%.

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Abstract

The invention discloses a recovery method of gold, and is applicable to carlin-type gold deposits. An inhibitor which at least comprises carboxymethyl cellulose (CMC) is added into ore pulp, fine slime obtained by interference flotation and non-purposive substance minerals (for example, carbonate, aluminosilicate and the like) are inhibited, and then gold carrying minerals are activated and then floated. The technological process is simple and the operation is convenient. Since the interference of interference substances to the ore pulp can be effectively inhibited by the inhibitor, previous slime removal operation can also be saved, and the gold recovery rate is improved.

Description

technical field [0001] The present application relates to the technical field of beneficiation, and in particular, to a method for recovering gold. Background technique [0002] Carlin-type gold ore is a typical fine-grained gold ore. The gold in the gold ore is dispersed in sulfide minerals and clay minerals in an ultra-microscopic state, and contains a certain amount of harmful impurities such as arsenic and carbon. The beneficiation enrichment is relatively low, and it is a typical refractory gold ore. This type of gold ore has many clay minerals and carbonaceous minerals, and the content of primary slime is relatively large, and it is easy to produce a large amount of secondary slime during the grinding process, which affects the flotation effect. In the flotation process, it is necessary to remove the sludge in advance, and then carry out the flotation. However, the conventional flotation method has no obvious effect on the flotation of the Carlin-type gold ore, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/018B03D101/06
CPCB03B7/00B03D1/018B03D2201/06B03D2203/025
Inventor 刘万峰赵志强罗思岗王立刚孙志健田祎兰罗科华贺政于洋胡志凯
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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