CN1035485C - Method for extracting copper from gold concentrate containing high content of copper - Google Patents

Method for extracting copper from gold concentrate containing high content of copper Download PDF

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CN1035485C
CN1035485C CN93120916A CN93120916A CN1035485C CN 1035485 C CN1035485 C CN 1035485C CN 93120916 A CN93120916 A CN 93120916A CN 93120916 A CN93120916 A CN 93120916A CN 1035485 C CN1035485 C CN 1035485C
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extraction
copper
organic phase
agent
water
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CN1104259A (en
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周学玺
朱屯
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Institute of Process Engineering of CAS
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Institute of Chemical Metallurgy CAS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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Abstract

The present invention belongs to the wet metallurgy field of non-ferrous metals, particularly to a technology of extracting copper from aurum ore concentrate with high copper content with an extraction-electrodeposit method. The technology adopts a hydroxamic extracting agent with high load for copper and easy back extraction, proper acid or neutral substances are used for processing an organic phase, and appropriate measures for strengthening extraction and back extraction are taken for making the copper content in raffinate reduce below 0.1 g/l. The recovery rate of copper can be enhanced by 3% to 5%, the recovery rate of aurum and silver is not influenced, and the comprehensive economic benefit of smelting gold is obviously enhanced.

Description

A kind of method of from the higher gold ore pickling liquor of cupric, extracting copper
The invention belongs to non-ferrous metal hydrometallurgy field, is a kind of method of extracting copper from the higher gold ore pickling liquor of cupric, particularly adopts extraction-electrodeposition to extract the technology of copper.
As everyone knows, copper occupies an important position in national economy.Copper, copper alloy and compound are widely used in electrical industry, machine manufacturing, national defense industry, agricultural and medicinal career.Along with science and technology development, its purposes will be more and more widely, also can constantly increase the demand of copper.
Traditional wet method copper-extracting process is a displacement-smelting process: the copper in the leaching liquid becomes copper sponge with iron powder replacement, and then with pyrorefining Cheng Jingtong.And solvent extraction is a younger technology in the hydrometallurgy, and its method is earlier the copper in the leaching liquid to be extracted in the organic phase, with suitable reverse-extraction agent copper back extraction from organic phase is got off again, is refined into electrolytic copper through galvanic deposit, i.e. extraction-electrodeposition process.
Although displacement-melting technology is the technology of comparative maturity, be extensive use of it both at home and abroad, also once be it is believed that it is most economical method.But it is compared with extraction-electrodeposition process, also has its weak point.Mainly be that efficient is low, iron consumption amount is big, and long flow path is so the rate of recovery of copper is low.Corresponding productive expense is also high, will exceed 30～40% expense in general than extraction-electrodeposition method.By contrast, adopt extraction-electrodeposition process feed liquid treatment capacity big, process cost is low, and artificial few, labour intensity is low.Can directly obtain lower-cost electrolytic copper.Because leaching, extraction, electrodeposition are three closed cycles, lose lessly, when two kinds of technologies were competed mutually, extraction-electrodeposition method had remarkable advantages.
Gold smelting is to extract gold and silver, the neither rate of recovery that can influence gold and silver of the recovery of other by product.The gold sulphide concentrate higher to cupric adopts sulfurization roasting to carry out pre-treatment at present in the gold smelting factory.Calcining is with water or dilute sulphuric acid leaching, and the leaching slag is used for cyanidation gold-extracted, silver-colored; Leach liquor is used for reclaiming copper, and its main component is copper, iron.For copper is separated with iron, existing flow process adopts iron powder replacement copper, produces the copper sponge of cupric 70～80%, and then copper sponge with pyrometallurgical smelting Cheng Jingtong.Displacement tail washings cupric is 0.3～0.5g/l, and this is to utilize resources synthetically, and it is disadvantageous improving whole economic efficiency, and obviously difficulty is compared with extraction-electrodeposition process.Extraction-electrodeposition process is made up of three closed circuit circulatory systems.I.e. leaching-extraction, extraction-reextraction, back extraction-electrodeposition respectively be one closed circuit.Raffinate can turn back to the leaching section and recycle, and the load organic phase can turn back to extraction section and recycle after back extraction, and the electrodeposition lean solution can be used as reverse-extraction agent and turns back to stripping section.Yet in the gold smelting process, raffinate can not turn back to leaching section, so as not to the organic phase pollution effect rate of recovery of gold and silver, to carry copper superior for extraction-electrodeposition process although Here it is, can not be directly used in the reason in the higher gold concentrate smelting of cupric.
The purpose of this invention is to provide a kind of in gold smelting, can direct production electric copper output, and do not influence the rate of recovery of gold and silver, can improve the rate of recovery of copper again, thereby improve the method for from the higher gold ore pickling liquor of cupric, extracting copper of whole economic efficiency.That is: extraction-electrodeposition process of using is used for gold smelting in the coppersmith industry, to replace the displacement-melting technology of present application.
The object of the present invention is achieved like this: can not return leaching in order to avoid produce and pollute and influence the gold and silver rate of recovery at the raffinate of present extraction-electrodeposition process, the present invention adopts the directly practice of discharging of raffinate, thus the influence of having avoided the collection process for copper that gold and silver are reclaimed.Owing to be direct discharging, cupric is low as much as possible in this raffinate that just requires to be discharged, in order to reach this purpose, a series of measures of strengthening extraction process have been taked, particularly with suitable mineral acid treatment agent and the organic phase after the water washing back extraction, copper content in the raffinate is dropped to below the 0.1g/l, reduced the residual copper content in the raffinate to greatest extent, the concrete practice is:
1) be extraction agent with 2-hydroxyl-5-nonyl phenyl methyl ketone ketoxime, it is mixed with concentration (volume ratio, below all represent with v/v) is 10～50% kerosin-be commonly referred to organic phase.
2) feed liquid is carried out suitable pre-treatment, regulate pH=1.5～2.5, copper ion concentration 1～10g/l.
3) suitably control extraction process: extraction progression: 1～5 grade; Organic phase is 0.8～2 with the ratio of water volume; The residence time: 2～8 minutes; Stirring velocity: 400～800rpm; Temperature: 15～45 ℃.
4) back extraction process control: organic phase with the ratio of water volume is: 1～10; Reverse-extraction agent is formed: Cu 2+10～30g/l, Fe 3+0～1g/l, H 2SO 4130～230g/l; Stirring velocity: 400～800rpm; Temperature: 15～45 ℃.
5) with suitable mineral acid treatment agent and the organic phase after the water washing back extraction.Mineral acid such as sulfuric acid.Its method is with the organic phase after the sulfuric acid scrubbing back extraction of proper concn, washs it with pure water again, and the organic phase of handling can directly turn back to extraction section and recycle.
Concrete solution of the present invention is:
A kind of method of extracting copper from the higher gold ore pickling liquor of cupric, this method has adopted extraction-electrodeposition process, after it is characterized in that washing with suitable mineral acid treatment agent and the water organic phase after to back extraction, turns back to extraction section again and recycles.Concrete measure is as follows:
1) with hydroxyl oxime extraction agent: 2-hydroxyl-5-nonyl phenyl methyl ketone ketoxime is dissolved in and obtains organic phase in the kerosene, and the concentration (v/v) of extraction agent in kerosene is between 10～50%;
2) feed liquid is used rare H 2SO 4Transfer pH=1.5～2.5;
3) extraction progression is 1～5 grade, and organic phase is 0.8～2 with the ratio of water volume, and the residence time is 2～8 minutes, and stirring velocity is 400～800rpm, and temperature is 15～45 ℃;
4) reverse-extraction agent is for containing Cu 2+10～30g/l, Fe 3+0～1g/l, H 2SO 4The aqueous solution of 130～230g/l, organic phase is 1～10 with the ratio of water volume, and stirring velocity is 400～800rpm, and temperature is 15～45 ℃;
5) organic phase after the back extraction is returned extraction section again and is recycled after suitable mineral acid treatment agent and water washing.
Mineral acid can be a sulfuric acid.
Advantage of the present invention and positively effect:
(1) the present invention is simple, easy to operate owing to having adopted extraction-electrodeposition process to have technology, and productive expense is low, and loss is few, characteristics such as copper recovery height.
(2) the present invention has adopted the directly method of discharging of raffinate, thus the influence of having avoided the collection process for copper that gold and silver are reclaimed.
(3) owing to be direct discharging, cupric is low as much as possible in this raffinate that just requires to be discharged, in order to reach this purpose, the present invention has taked a series of measures of strengthening extraction process, particularly with suitable mineral acid treatment agent and the organic phase after the water washing back extraction, copper content in the raffinate is dropped to below the 0.1g/l, reduced the residual copper content in the raffinate to greatest extent.
(4) with the true feed liquid of certain gold smelting factory of this art breading, the raffinate copper content can drop to below the 0.1g/l, and the replacing process of the displacement tail washings cupric 0.3～0.5g/l that is moving with present this factory is compared, and the rate of recovery of copper can improve 3～5%.Can obtain the rich electrolytic solution of the low iron of cupric 30～60g/l peracid with the lean electrolyte back extraction, favourable raising current efficiency obtains the high quality electrolytic copper.Whole flow process is successive rationally not to produce new pollution, does not also influence the recovery of gold and silver, and production cost can reduce by 20%.
Provide specific embodiment of the present invention below
A kind of method of from the higher gold ore pickling liquor of cupric, extracting copper, this method has adopted extraction-electrodeposition process, it is characterized in that after the back extraction organic phase after suitable mineral acid treatment agent and water washing, turn back to extraction section again and recycle.Concrete measure is as follows:
1) with hydroxyl oxime extraction agent: 2-hydroxyl-5-nonyl phenyl methyl ketone ketoxime is dissolved in and obtains organic phase in the kerosene, and the concentration (v/v) of extraction agent in kerosene is 25%;
2) feed liquid is used rare H 2SO 4Transfer pH=2;
3) extraction progression is 1～5 grade, and organic phase is 1: 1 with the ratio of water volume, and the residence time is 5 minutes, and stirring velocity is 600rpm, and temperature is 23 ℃;
4) reverse-extraction agent is for containing Cu 2+20g/l, Fe 3+0.5g/l, H 2SO 4The aqueous solution of 150g/l, organic phase is 4: 1 with the ratio of water volume, and stirring velocity is 600rpm, and temperature is 23 ℃;
5) organic phase after the back extraction is returned extraction section again and is recycled after suitable mineral acid treatment agent and water washing.
Mineral acid can be a sulfuric acid.
Embodiment: in mixed volume is the mixer-settler of 60 * 60 * 70mm, carry out multi-stage counter current extraction.Feed liquid is certain true leach liquor of gold smelting factory, and its major impurity content is as shown in table 1, regulates copper, iron level and pH value with corresponding salt and acid.
Major impurity constituent content (g/l) in table 1 feed liquid
Zn Mu Si Al Ca Mg Pb Cr
1.63 0.12 0.12 0.48 0.55 0.69 0.0087 0.0011
Example 1: the major ingredient of feed liquid: Cu 2+3.50g/l, Fe 3+3.30g/l, pH=2.18; The composition of organic phase (v/v) is the kerosin of 10% extraction agent, and the organic phase after the back extraction was washed through the mineral acid treatment agent; The composition of reverse-extraction agent: Cu 2+11.22g/l, H 2SO 4220g/l.2 grades of extractions, 1 grade of back extraction, the operation phase volume ratio is a water: organic phase: reverse-extraction agent=1: 1: 1,4 minutes residence time, stirring velocity 500rpm, 23 ℃ of service temperatures.
Water outlet: Cu 2+0.12g/l, the rate of recovery 96.6% of copper.
Strip liquor outlet: Cu 2+14.72g/l, Fe 3+0.07g/l.
Example 2: the major ingredient of feed liquid: Cu 2+7.03g/l, Fe 3+7.20g/l, pH=1.75; The composition of organic phase (v/v) is the kerosin of 20% extraction agent, and the organic phase after the back extraction is through mineral acid treatment agent and water washing; Consisting of of reverse-extraction agent: Cu 2+12.23g/l, H 2SO 4140g/l, Fe 3+0.07g/l.3 grades of extractions, 3 grades of back extractions, the operation phase volume ratio is a water: organic phase: reverse-extraction agent=1: 1: 0.3,3 minutes residence time, stirring velocity 650rpm, 25 ℃ of temperature.
Water outlet: Cu 2+0.05g/l, the rate of recovery 99.3% of copper.
Strip liquor outlet: Cu 2+31.87, Fe 3+0.16g/l.
Example 3: the major ingredient of feed liquid: Cu 2+5.53g/l, Fe 3+6.85g/l, pH=2.00; Organic phase composition (v/v) is 30% extraction agent kerosin, and the organic phase after the back extraction is with mineral acid treatment agent and the online washing of water; Consisting of of reverse-extraction agent: Cu 2+20.03g/l, Fe 3+0.10g/l, sulfuric acid 180g/l.2 grades of extractions, 2 grades of back extractions, the operation phase volume ratio is a water: organic phase: reverse-extraction agent=1: 1: 0.2,5 minutes residence time, stirring velocity 710rpm, 22 ℃ of temperature.
Water outlet: Cu 2+0.011g/l, the yield 99.8% of copper.
Strip liquor outlet: Cu 2+50.85g/l, Fe 3+0.17g/l.

Claims (2)

1. method of from the higher gold ore pickling liquor of cupric, extracting copper, its step is as follows:
1) is extraction agent with 2-hydroxyl-5-nonyl phenyl methyl ketone ketoxime, it is dissolved in obtains organic phase in the kerosene.The concentration (volume ratio) of extraction agent in kerosene is between 10～50%;
2) feed liquid (being water) is used rare H 2SO 4Transfer pH=1.5～2.5;
3) extraction progression is 1～5 grade, and organic phase is 0.8～2 with the ratio of water volume, and the residence time is 2～8 minutes, and stirring velocity is 400～800rpm, and temperature is 15～45 ℃;
4) reverse-extraction agent is for containing Cu 2+10～30g/l, Fe 3+0～1g/l, H 2SO 4The aqueous solution of 130～230g/l, organic phase is 1～10 with the ratio of water volume, and temperature is 15～45 ℃, and stirring velocity is 400～800rpm;
5) organic phase after the back extraction turns back to extraction section again and recycles after suitable mineral acid treatment agent and water washing.
2. a kind of method of extracting copper from the higher gold ore pickling liquor of cupric according to claim 1, it is characterized in that: mineral acid is a sulfuric acid.
CN93120916A 1993-12-20 1993-12-20 Method for extracting copper from gold concentrate containing high content of copper Expired - Fee Related CN1035485C (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100342042C (en) * 2002-08-15 2007-10-10 北京有色金属研究总院 Acid balance method in biometallugical process
CN103184333B (en) * 2011-12-30 2014-08-06 北京有色金属研究总院 High grade copper oxide-containing material sulfuric acid leaching and stage extraction technology
CN103572322B (en) * 2012-08-02 2017-05-10 厦门紫金矿冶技术有限公司 Method for recycling gold and copper from copper-containing oxidization gold ores
CN103194770B (en) * 2013-03-22 2016-03-09 紫金矿业集团股份有限公司 From low-grade cupric difficult-treating gold mine ammonia-cyanide leaching ore pulp, electrodeposition puies forward the technique of gold
CN110527831A (en) * 2019-09-20 2019-12-03 常州工学院 A method of copper is recycled using copper extractant

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655347A (en) * 1968-03-18 1972-04-11 Gen Mills Inc Process of extracting copper with certain substituted 2-hydroxybenzophenoximes
US4048282A (en) * 1974-08-23 1977-09-13 Metallurgical Processes Limited Solvent extraction of copper with dilution of the organic phase
US4582689A (en) * 1982-02-22 1986-04-15 Henkel Corporation Solvent extraction process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655347A (en) * 1968-03-18 1972-04-11 Gen Mills Inc Process of extracting copper with certain substituted 2-hydroxybenzophenoximes
US4048282A (en) * 1974-08-23 1977-09-13 Metallurgical Processes Limited Solvent extraction of copper with dilution of the organic phase
US4582689A (en) * 1982-02-22 1986-04-15 Henkel Corporation Solvent extraction process

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