CN103194614B - The method that a kind of low-grade copper gold dump leaching-charcoal absorption is produced - Google Patents
The method that a kind of low-grade copper gold dump leaching-charcoal absorption is produced Download PDFInfo
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- CN103194614B CN103194614B CN201310094576.4A CN201310094576A CN103194614B CN 103194614 B CN103194614 B CN 103194614B CN 201310094576 A CN201310094576 A CN 201310094576A CN 103194614 B CN103194614 B CN 103194614B
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Abstract
The present invention relates to the method that a kind of low-grade copper gold dump leaching-charcoal absorption is produced, the high-copper gold loaded carbon employing cyaniding decopper(ing) process portion that low-grade copper gold dump leaching-charcoal absorption process obtains removes the copper in gold loaded carbon, as the spray liquid in dump leaching latter stage after decopper(ing) liquid utilizes absorption lean solution to dilute, decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process.The present invention has that technical process is simple, less investment, without the need to increasing the advantages such as other former paving material, easily industrializing implementation, production cost are low; High-copper gold loaded carbon, after cyaniding decopper(ing), can improve the golden desorption efficiency of gold loaded carbon, improves the absorption property of regenerated carbon, thus improves the adsorption rate of gold, optimization production technical indicator; Dump leaching is adopted to sink process for copper latter stage, the part copper in decopper(ing) liquid and absorption lean solution can be made again to precipitate in stockyard, and heavy copper can be utilized to react the sodium cyanide Leaching of Gold produced, effectively can control the copper concentration in dump leaching-charcoal adsorption system, production system can be made to be in Recycle mechanism 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, smelt recycling again after mostly adopting floatation process to carry out the enrichment of copper gold to more high-grade gold-copper ore, and be oxidized or half certain Oxidized Gold Ore for the cupric that copper gold grade is lower, technology for gold is carried in most employing dump leaching-charcoal absorption.Because copper content is higher, in heap leaching process, the leaching of copper can consume a large amount of prussiates and not cause gold leaching rate high or make leaching cost increase, even causes that to carry gold infeasible economically; In addition, copper cyanogen complex ion is comparatively large on the impact of subsequent job, is mainly reflected in the aspects such as gac copper content raises, charcoal absorption performance declines, the desorb of gold loaded carbon gold-electrodeposition difficulty, increase of gold refining cost.
Therefore, in order to reduce as far as possible or avoid copper on the impact of gold extraction technology, particularly copper is on charcoal absorption and the impact of follow-up desorb gold process, West Australia Gibson gold mine has carried out the experimental study of leach liquor charcoal absorbing copper, high-copper charcoal sodium cyanide desorb copper, stripping liquid acidization recovery copper and sodium cyanide, but because production cost is high, acidization exists the reasons such as potential safety hazard, the unrealized industrial application of this technique.The people such as mineral products comprehensive utilizating research institute of Ministry of Geology and Mineral Resources of China Pan Zhi soldier have successively carried out high-copper gold loaded carbon cyaniding decopper(ing) and the experimental study of ammonia leaching decopper(ing), all obtain higher decopper(ing) rate, auri is not originally leached, and cyaniding decopper(ing) technique copper decreasing ratio can reach 95%, and ammonia leaching decopper(ing) technique copper decreasing ratio can reach 90%.But this cyaniding decopper(ing) technique must adopt acidization to reclaim copper and prussiate, there is HCN gas and overflow the potential safety hazard brought, higher to the safety operation requirement of producing; The problems such as ammonia leaching decopper(ing) technique needs to use high density ammoniacal liquor, there is operating environment difference, and ammonia leaching solution recovery ammonia utilization ratio is not high.
Three. summary of the invention
The object of the present invention is to provide the method that a kind of low-grade copper gold dump leaching-charcoal absorption is produced, the method technical process is short, cost is low, less investment, simple to operate, easy industrializing implementation, realizes balance of copper and controls and production system benign cycle.
The present invention adopts following technical scheme:
The high-copper gold loaded carbon (copper grade >10kg/t) that low-grade copper gold dump leaching-charcoal absorption process obtains adopts cyaniding decopper(ing) process portion to remove copper in gold loaded carbon, as the spray liquid in dump leaching latter stage after decopper(ing) liquid utilizes absorption lean solution to dilute, part copper is precipitated again in stockyard, and utilizing the sodium cyanide Leaching of Gold that heavy copper reaction produces, decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process.Detailed processing condition are as follows:
(a) high-copper gold loaded carbon cyaniding decopper(ing): the gold loaded carbon that copper grade is higher, with 0.1% ~ 20% alkaline sodium cyanide solution, static decopper(ing) 1 ~ 35h under liquid charcoal is than the condition of 1 ~ 20, every 15 ~ 30min air agitation layer of charcoal once;
Sink copper (b) latter stage: decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L, copper is precipitated again in stockyard, and utilizes the sodium cyanide Leaching of Gold that heavy copper reaction produces.
Advantage of the present invention:
1, simple, the less investment of technical process, without the need to increasing other former paving material, easily industrializing implementation, production cost is low;
2, high-copper gold loaded carbon is after cyaniding decopper(ing), can improve the golden desorption efficiency of gold loaded carbon, improves the absorption property of regenerated carbon, thus improves the adsorption rate of gold, optimization production technical indicator;
3, dump leaching is adopted to sink process for copper latter stage, the part copper in decopper(ing) liquid and absorption lean solution can be made again to precipitate in stockyard, and heavy copper can be utilized to react the sodium cyanide Leaching of Gold produced, effectively can control the copper concentration in dump leaching-charcoal adsorption system, production system can be made to be in Recycle mechanism environment all the time.
Four. accompanying drawing explanation
Fig. 1 is the schema of the method that a kind of low-grade copper gold dump leaching of the present invention-charcoal absorption is produced.
Five. embodiment
Below in conjunction with accompanying drawing, the invention will be further described
(a) dump leaching-charcoal absorption: low-grade copper gold is built heap, with lower concentration sodium cyanide solution shower-bubble type, produced golden liquid is adsorbed with gac at normal temperatures;
(b) high-copper gold loaded carbon cyaniding decopper(ing): the gold loaded carbon sodium cyanide solution that copper grade is higher carries out static cyaniding decopper(ing);
Sink copper (c) latter stage: decopper(ing) liquid utilizes the spray liquid as dump leaching latter stage after the dilution of absorption lean solution, make copper partly precipitated in solution in heap, reduce the continuous accumulation of copper in dump leaching-charcoal adsorption system, and utilize the sodium cyanide Leaching of Gold that heavy copper reaction produces;
(d) High Temperature High Pressure non-cyanide desorption-electrodeposition, gold refining: by the desorb under high-temperature and high-pressure conditions of decopper(ing) charcoal, the gold-containing solution after 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 Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon of copper grade 15kg/t at liquid charcoal than 10, cyaniding decopper(ing) 18h under the condition of sodium cyanide 3%, every 15 ~ 30min air agitation layer of charcoal once; Decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L, part copper is precipitated again in stockyard, and utilizes the sodium cyanide Leaching of Gold that heavy copper reaction produces; Decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach copper concentration average control in your liquid at 100mg/L, the adsorption rate leaching your liquid gold is 97.33%, the decreasing ratio 73.33% of gold loaded carbon cyaniding decopper(ing) copper, and decopper(ing) liquid to sink the desorption efficiency 99.25% of copper rate 50.22%, gold latter stage.
Embodiment two:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon of copper grade 12kg/t at liquid charcoal than 15, cyaniding decopper(ing) 36h under the condition of sodium cyanide 5%, every 15 ~ 30min air agitation layer of charcoal once; Decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L, part copper is precipitated again in stockyard, and utilizes the sodium cyanide Leaching of Gold that heavy copper reaction produces; Decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach copper concentration average control in your liquid at 80mg/L, the adsorption rate leaching your liquid gold is 98.33%, the decreasing ratio 87.50% of gold loaded carbon cyaniding decopper(ing) copper, and decopper(ing) liquid to sink the desorption efficiency 99.65% of copper rate 45.45%, gold latter stage.
Embodiment three:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon of copper grade 18kg/t at liquid charcoal than 8, cyaniding decopper(ing) 15h under the condition of sodium cyanide 2%, every 15 ~ 30min air agitation layer of charcoal once; Decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L, part copper is precipitated again in stockyard, and utilizes the sodium cyanide Leaching of Gold that heavy copper reaction produces; Decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach copper concentration average control in your liquid at 140mg/L, the adsorption rate leaching your liquid gold is 95.67%, the decreasing ratio 66.67% of gold loaded carbon cyaniding decopper(ing) copper, and decopper(ing) liquid to sink the desorption efficiency 97.83% of copper rate 47.37%, gold latter stage.
Embodiment four:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon of copper grade 23kg/t at liquid charcoal than 6, cyaniding decopper(ing) 12h under the condition of sodium cyanide 0.8%, every 15 ~ 30min air agitation layer of charcoal once; Decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L, part copper is precipitated again in stockyard, and utilizes the sodium cyanide Leaching of Gold that heavy copper reaction produces; Decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach copper concentration average control in your liquid at 180mg/L, the adsorption rate leaching your liquid gold is 94.67%, the decreasing ratio 52.17% of gold loaded carbon cyaniding decopper(ing) copper, and decopper(ing) liquid to sink the desorption efficiency 95.67% of copper rate 42.71%, gold latter stage.
Comparative example one:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon of copper grade 13kg/t at liquid charcoal than 10, cyaniding decopper(ing) 18h under the condition of sodium cyanide 3%, every 15 ~ 30min air agitation layer of charcoal once; Decopper(ing) liquid carries out wastewater treatment; Decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach copper concentration average control in your liquid at 80mg/L, the adsorption rate leaching your liquid gold is 97.67%, the decreasing ratio 70.77% of gold loaded carbon cyaniding decopper(ing) copper, and the sodium cyanide in decopper(ing) liquid is not recycled utilization, the desorption efficiency 99.25% of gold.
Comparative example two:
The low-grade copper gold of gold grade 0.5g/t, copper content 0.03% is carried out dump leaching Cyanide Leaching, leaches your liquid and utilize charcoal absorption; The gold loaded carbon that copper grade is higher is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process, and the thick bronze obtained obtains ingot after gold refining, and regenerated carbon returns charcoal adsorption system.Leach the copper concentration >200mg/L in your liquid, the adsorption rate leaching your liquid gold is 92.33%, the desorption efficiency 91.33% of gold.
Claims (5)
1. the method for low-grade copper gold dump leaching-charcoal absorption production, it is characterized in that: the high-copper gold loaded carbon employing cyaniding decopper(ing) process portion that low-grade copper gold dump leaching-charcoal absorption process obtains removes the copper in gold loaded carbon, as the spray liquid in dump leaching latter stage after decopper(ing) liquid utilizes absorption lean solution to dilute, part copper is precipitated again in stockyard, and utilizing the sodium cyanide Leaching of Gold that heavy copper reaction produces, decopper(ing) charcoal is sent to High Temperature High Pressure non-cyanide desorption-electrodeposition system process.
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: process low-grade copper gold, Gold in Ores grade 0.2 ~ 0.8g/t, 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: the gold loaded carbon cupric that low-grade copper gold obtains through dump leaching-charcoal absorption process is of high grade, 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 gold loaded carbon employing cyaniding decopper(ing) process portion removes the copper in gold loaded carbon, alkalescence sodium cyanide solution 0.1% ~ 20%, liquid charcoal 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, is characterized in that: cyaniding decopper(ing) liquid utilizes absorption lean solution to be diluted to spray liquid as dump leaching latter stage after sodium cyanide concentration <50mg/L.
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| CN104087747B (en) * | 2014-04-21 | 2017-07-14 | 云南黄金矿业集团股份有限公司 | The method that valuable metal is desorbed 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 |
| CN104294042B (en) * | 2014-09-02 | 2016-09-21 | 厦门紫金矿冶技术有限公司 | A kind of ammonia cyanogen method selectivity is from the method for high-copper gold loaded carbon decopper(ing) |
| 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 |
| 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 |
| 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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