CN103194614A - Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method - Google Patents
Low-grade copper-bearing gold ore dump leaching-carbon adsorption production method Download PDFInfo
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- CN103194614A CN103194614A CN2013100945764A CN201310094576A CN103194614A CN 103194614 A CN103194614 A CN 103194614A CN 2013100945764 A CN2013100945764 A CN 2013100945764A CN 201310094576 A CN201310094576 A CN 201310094576A CN 103194614 A CN103194614 A CN 103194614A
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Abstract
The invention relates to a low-grade copper-bearing gold ore dump leaching-carbon adsorption production method. Copper contained in high-copper gold-carried carbon obtained through a low-grade copper-bearing gold ore dump leaching-carbon adsorption procedure is partially removed by adopting a cyaniding decoppering process, a decoppering solution is diluted by utilizing an adsorption barren solution to be used as a spray solution at the late stage of dump leaching, and decoppering carbon is conveyed to a high-temperature high-pressure cyanide-free desorption-electrodeposition system for treatment. The low-grade copper-bearing gold ore dump leaching-carbon adsorption production method disclosed by the invention has the advantages of simple process flow, small investment, no other original paving material addition, low production cost and the like, and is easy to industrially implement; according to the invention, after the high-copper gold-carried carbon is subjected to cyaniding decoppering, the gold desorption rate of the high-copper gold-carried carbon can be enhanced, and the adsorption property of regenerated carbon is enhanced, so that the adsorption rate of gold is enhanced, and the production technology index is optimized; and a part of copper contained in the decoppering solution and the adsorption barren solution can be deposited in a stock dump again by adopting a copper deposition process at the late stage of the dump leaching, the gold can be leached by utilizing sodium cyanide generated through copper deposition reaction, so that the concentration of copper contained in the dump leaching-carbon adsorption system can be effectively controlled, and the production system can be in a good operating environment all the time.
Description
One. technical field
The present invention relates to metallurgy industry, the method that particularly a kind of low-grade copper gold dump leaching-charcoal absorption is produced.
Two. background technology
At present, adopt floatation process to carry out smelting recycling again after the enrichment of copper gold mostly to the auricupride stone than higher-grade, and for copper gold grade lower cupric oxidation or half gold trioxide ore, technology for gold is carried in most employing dump leaching-charcoal absorption.Higher because of copper content, in the heap leaching process, the leaching of copper can consume a large amount of prussiates and not cause gold leaching rate high or make and leach cost and rise, even causes that to carry gold infeasible economically; In addition, copper cyanogen complex ion is bigger to the influence of subsequent job, is mainly reflected in aspects such as the rising of gac copper content, charcoal absorption degradation, the desorb-electrodeposition difficulty of carrying golden charcoal gold, the increase of gold refining cost.
Therefore, in order to reduce as far as possible or to avoid copper to the influence of gold extraction technology, particularly copper is to the influence of charcoal absorption and follow-up desorb gold process, West Australia Gibson gold mine has carried out the experimental study that leach liquor charcoal absorbing copper, high-copper charcoal sodium cyanide desorb copper, stripping liquid acidization reclaim copper and sodium cyanide, but because there are reasons such as potential safety hazard in production cost height, acidization, this technology industrial application that is unrealized.People such as the Pan Zhi soldier of mineral products comprehensive utilizating research institute of China Ministry of Geology and Mineral Resources have carried out successively that high-copper carries golden charcoal cyaniding decopper(ing) and ammonia soaks the decopper(ing) experimental study, all obtained higher decopper(ing) rate, auri is not originally leached, and cyaniding decopper(ing) technology copper decreasing ratio can reach 95%, and ammonia soaks decopper(ing) technology copper decreasing ratio can reach 90%.But this cyaniding decopper(ing) technology must adopt acidization to reclaim copper and prussiate, and the potential safety hazard that exists HCN gas to overflow and bring is had relatively high expectations to the safety operation on producing; Ammonia soaks the decopper(ing) arts demand and uses high density ammoniacal liquor, exists operating environment poor, and ammonia soaks problems such as solution ammonia recovery utilization rate is not high.
Three. summary of the invention
The method that the object of the present invention is to provide a kind of low-grade copper gold dump leaching-charcoal absorption to produce, this method technical process is short, cost is low, less investment, simple to operate, easy industrializing implementation, realizes that balance of copper control and production system circulate benignly.
The present invention adopts following technical scheme:
The low-grade high-copper that the copper gold dump leaching-the charcoal absorption process obtains carries golden charcoal (copper grade〉10kg/t) and adopts cyaniding decopper(ing) process portion to remove the copper that carries in the golden charcoal, decopper(ing) liquid utilization absorption lean solution dilution back is as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide leaching gold that utilizes heavy copper reaction to produce, the decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles.Detailed processing condition are as follows:
(a) high-copper carries golden charcoal cyaniding decopper(ing): copper grade is higher carries golden charcoal, with 0.1%～20% alkaline sodium cyanide solution, the liquid charcoal than 1～20 condition under static decopper(ing) 1～35h, every 15～30min air agitation charcoal layer once;
(b) latter stage heavy copper: decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage, copper is precipitated in the stockyard again, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold.
Advantage of the present invention:
1, simple, the less investment of technical process, need not to increase other former shop material, easily industrializing implementation, production cost are low;
2, after high-copper carries golden charcoal process cyaniding decopper(ing), can improve the golden desorption efficiency that carries golden charcoal, improve the absorption property of regenerated carbon, thereby improve the adsorption rate of gold, optimization production technical indicator;
3, adopt dump leaching heavy process for copper in latter stage, part copper in decopper(ing) liquid and the absorption lean solution is precipitated in the stockyard again, and the sodium cyanide that can utilize heavy copper reaction to produce leaches gold, can effectively control the copper concentration in dump leaching-charcoal adsorption system, can make production system be in optimum running environment all the time.
Four. description of drawings
Fig. 1 is the schema of a kind of low-grade copper gold dump leaching of the present invention-method that charcoal absorption is produced.
Five. embodiment
Below in conjunction with accompanying drawing the present invention is further described
(a) dump leaching-charcoal absorption: low-grade copper gold is built heap, leach with lower concentration sodium cyanide solution spray, the golden liquid that produces is adsorbed with gac at normal temperatures;
(b) high-copper carries golden charcoal cyaniding decopper(ing): the golden charcoal that carries that copper grade is higher carries out static cyaniding decopper(ing) with sodium cyanide solution;
(c) latter stage heavy copper: decopper(ing) liquid utilization absorption lean solution dilution back is as the dump leaching spray liquid in latter stage, makes copper partly precipitated in the solution in heap, reduce the continuous accumulation of copper in dump leaching-charcoal adsorption system, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold;
(d) High Temperature High Pressure non-cyanide desorption-electrodeposition, gold refining: with the desorb under high-temperature and high-pressure conditions of decopper(ing) charcoal, the gold-containing solution after the desorb carries out electrodeposition, obtains thick bronze, obtains ingot through gold refining.
Below in conjunction with embodiment method of the present invention is described further.
Embodiment one:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; Copper grade 15kg/t carry golden charcoal the liquid charcoal than 10, under the condition of sodium cyanide 3% cyaniding decopper(ing) 18h, every 15～30min air agitation charcoal layer once; Decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold; The decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.The copper concentration that leaches in your liquid is on average controlled at 100mg/L, and the adsorption rate that leaches your liquid gold is 97.33%, carries the decreasing ratio 73.33% of golden charcoal cyaniding decopper(ing) copper, decopper(ing) liquid heavy copper rate 50.22% in latter stage, the desorption efficiency 99.25% of gold.
Embodiment two:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; Copper grade 12kg/t carry golden charcoal the liquid charcoal than 15, under the condition of sodium cyanide 5% cyaniding decopper(ing) 36h, every 15～30min air agitation charcoal layer once; Decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold; The decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.The copper concentration that leaches in your liquid is on average controlled at 80mg/L, and the adsorption rate that leaches your liquid gold is 98.33%, carries the decreasing ratio 87.50% of golden charcoal cyaniding decopper(ing) copper, decopper(ing) liquid heavy copper rate 45.45% in latter stage, the desorption efficiency 99.65% of gold.
Embodiment three:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; Copper grade 18kg/t carry golden charcoal the liquid charcoal than 8, under the condition of sodium cyanide 2% cyaniding decopper(ing) 15h, every 15～30min air agitation charcoal layer once; Decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold; The decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.The copper concentration that leaches in your liquid is on average controlled at 140mg/L, and the adsorption rate that leaches your liquid gold is 95.67%, carries the decreasing ratio 66.67% of golden charcoal cyaniding decopper(ing) copper, decopper(ing) liquid heavy copper rate 47.37% in latter stage, the desorption efficiency 97.83% of gold.
Embodiment four:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; Copper grade 23kg/t carry golden charcoal the liquid charcoal than 6, under the condition of sodium cyanide 0.8% cyaniding decopper(ing) 12h, every 15～30min air agitation charcoal layer once; Decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide that utilizes heavy copper reaction to produce leaches gold; The decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.The copper concentration that leaches in your liquid is on average controlled at 180mg/L, and the adsorption rate that leaches your liquid gold is 94.67%, carries the decreasing ratio 52.17% of golden charcoal cyaniding decopper(ing) copper, decopper(ing) liquid heavy copper rate 42.71% in latter stage, the desorption efficiency 95.67% of gold.
Comparative Examples one:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; Copper grade 13kg/t carry golden charcoal the liquid charcoal than 10, under the condition of sodium cyanide 3% cyaniding decopper(ing) 18h, every 15～30min air agitation charcoal layer once; Decopper(ing) liquid carries out wastewater treatment; The decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.The copper concentration that leaches in your liquid is on average controlled at 80mg/L, and the adsorption rate that leaches your liquid gold is 97.67%, carries the decreasing ratio 70.77% of golden charcoal cyaniding decopper(ing) copper, and the sodium cyanide in the decopper(ing) liquid does not obtain recycling, the desorption efficiency 99.25% of gold.
Comparative Examples two:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching cyaniding leaching, leach your liquid and utilize charcoal absorption; The golden charcoal that carries that copper grade is higher is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles, and the thick bronze that obtains obtains ingot through behind the gold refining, and regenerated carbon returns the charcoal adsorption system.Leach the copper concentration in your liquid〉200mg/L, the adsorption rate that leaches your liquid gold is 92.33%, the desorption efficiency 91.33% of gold.
Claims (6)
1. low-grade copper gold dump leaching-charcoal adsorbs the method for producing, it is characterized in that: the low-grade high-copper that the copper gold dump leaching-the charcoal absorption process obtains carries golden charcoal and adopts cyaniding decopper(ing) process portion to remove the copper that carries in the golden charcoal, decopper(ing) liquid utilization absorption lean solution dilution back is as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and the sodium cyanide leaching gold that utilizes heavy copper reaction to produce, the decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system handles.
2. the method that a kind of low-grade copper gold dump leaching according to claim 1-charcoal absorption is produced is characterized in that: handle low-grade copper gold, gold grade 0.2～0.8g/t in the ore, copper grade 0.02～0.1%.
3. the method that a kind of low-grade copper gold dump leaching according to claim 1-charcoal absorption is produced is characterized in that: low-grade copper gold is of high grade through year golden charcoal cupric that dump leaching-charcoal absorption process obtains, copper grade 10～50kg/t.
4. the method that a kind of low-grade copper gold dump leaching according to claim 1-charcoal absorption is produced, it is characterized in that: high-copper carries golden charcoal and adopts cyaniding decopper(ing) process portion to remove the copper that carries in the golden charcoal, alkalescence sodium cyanide solution 0.1%～20%, the liquid charcoal is than 1～20, static decopper(ing) time 1～35h.
5. the method that a kind of low-grade copper gold dump leaching according to claim 1-charcoal absorption is produced, it is characterized in that: cyaniding decopper(ing) liquid utilization absorption lean solution dilution back is as the dump leaching spray liquid in latter stage, part copper is precipitated in the stockyard again, and can utilize the sodium cyanide in the decopper(ing) liquid to leach gold.
6. the method that a kind of low-grade copper gold dump leaching according to claim 1-charcoal absorption is produced is characterized in that: cyaniding decopper(ing) liquid utilization absorption lean solution is diluted to behind sodium cyanide concentration＜50mg/L as the dump leaching spray liquid in latter stage.
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Cited By (9)
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| CN104060091A (en) * | 2014-06-13 | 2014-09-24 | 北京科技大学 | Low-grade valuable metal leaching-biosorption-electrodeposition hydrometallurgy process |
| CN104087747A (en) * | 2014-04-21 | 2014-10-08 | 云南黄金矿业集团股份有限公司 | Method for desorbing valuable metals from gold loaded carbon |
| CN104294042A (en) * | 2014-09-02 | 2015-01-21 | 厦门紫金矿冶技术有限公司 | Method for selective removal of copper from high copper gold loaded carbon by ammoniacal cyanide process |
| CN104388672A (en) * | 2014-10-28 | 2015-03-04 | 紫金矿业集团股份有限公司 | Process for extracting gold from gold ore containing copper by using ammonia, cyanide and carbon |
| CN104745834A (en) * | 2015-03-12 | 2015-07-01 | 云南滇金投资有限公司 | Stage desorption and electrodeposition method for high gold and silver loaded carbon |
| CN106367612A (en) * | 2016-08-31 | 2017-02-01 | 胡中 | Method for converting Au+ to Au3+ |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108866347A (en) * | 2018-07-06 | 2018-11-23 | 武汉工程大学 | A kind of heavy copper method of cupric cyanide-leached solution |
| CN115232978A (en) * | 2022-07-29 | 2022-10-25 | 鹤庆北衙矿业有限公司 | Method for efficiently extracting gold, silver and copper from high-silver-copper-calcium complex gold-loaded carbon |
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| CN104087747A (en) * | 2014-04-21 | 2014-10-08 | 云南黄金矿业集团股份有限公司 | Method for desorbing valuable metals from gold loaded carbon |
| CN104060091B (en) * | 2014-06-13 | 2016-02-24 | 北京科技大学 | Low grade ore valuable metal leaching-biological adsorption-electrodeposition hydrometallurgical processes |
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| CN104388672A (en) * | 2014-10-28 | 2015-03-04 | 紫金矿业集团股份有限公司 | Process for extracting gold from gold ore containing copper by using ammonia, cyanide and carbon |
| CN104745834A (en) * | 2015-03-12 | 2015-07-01 | 云南滇金投资有限公司 | Stage desorption and electrodeposition method for high gold and silver loaded carbon |
| CN106367612A (en) * | 2016-08-31 | 2017-02-01 | 胡中 | Method for converting Au+ to Au3+ |
| CN106367612B (en) * | 2016-08-31 | 2018-06-15 | 胡中 | It is a kind of by Au+It is converted to Au3+Method |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108866347A (en) * | 2018-07-06 | 2018-11-23 | 武汉工程大学 | A kind of heavy copper method of cupric cyanide-leached solution |
| CN115232978A (en) * | 2022-07-29 | 2022-10-25 | 鹤庆北衙矿业有限公司 | Method for efficiently extracting gold, silver and copper from high-silver-copper-calcium complex gold-loaded carbon |
| CN115232978B (en) * | 2022-07-29 | 2023-07-18 | 鹤庆北衙矿业有限公司 | Method for efficiently extracting gold, silver and copper by high-silver copper-calcium complex gold-loaded carbon |
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