CN106222430B - Method for recovering copper and cobalt from copper-cobalt slag by wet metallurgy - Google Patents

Method for recovering copper and cobalt from copper-cobalt slag by wet metallurgy Download PDF

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Publication number
CN106222430B
CN106222430B CN201610631955.6A CN201610631955A CN106222430B CN 106222430 B CN106222430 B CN 106222430B CN 201610631955 A CN201610631955 A CN 201610631955A CN 106222430 B CN106222430 B CN 106222430B
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cobalt
copper
slag
oxalic acid
hydrometallurgical
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CN106222430A (en
Inventor
王永斌
王怡霖
王军辉
黄建芬
吴斌
周涛
吉鸿安
栗威
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Northwest Research Institute of Mining and Metallurgy
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Northwest Research Institute of Mining and Metallurgy
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C22B15/0067—Leaching or slurrying with acids or salts thereof
    • C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0084—Treating solutions
    • C22B15/0089—Treating solutions by chemical methods
    • C22B15/0091—Treating solutions by chemical methods by cementation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/04—Obtaining nickel or cobalt by wet processes
    • C22B23/0407—Leaching processes
    • C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
    • C22B23/043—Sulfurated acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/04—Obtaining nickel or cobalt by wet processes
    • C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C22B7/007—Wet processes by acid leaching
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a method for recovering copper and cobalt from copper-cobalt slag by hydrometallurgy. The method comprises the steps of reducing and grinding ores by adopting a reducing agent, then carrying out acid leaching to obtain a leaching solution containing copper and cobalt, replacing the leaching solution with iron powder to obtain sponge copper, and precipitating with oxalic acid to obtain the cobalt oxalate. The method provided by the invention has the advantages of high leaching rate of copper and cobalt in the copper-cobalt slag, good separation from other impurities, small environmental pollution, simple process and low cost of required equipment.

Description

A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method
Technical field
The invention belongs to hydrometallurgy field of engineering technology, and in particular to a kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt Method.
Background technology
In metallurgical industry, separation of Cu and Co is one of subject matter that cobalt resource makes full use of.Current cobalt metallurgical technology Mainly pressure leaching-solvent extraction-electrowinning with insoluble anode.Although pressure leaching technology and solvent extraction technology increasingly into It is ripe, it is used widely in hydrometallurgy, but the equipment investment of the technique is larger, and production technology is more complicated.
The content of the invention
The technical problems to be solved by the invention are the problem of presence for prior art, there is provided a kind of wet method of copper cobalt slag Metallurgy recovery copper, cobalt method, this method is not only able to reclaim copper, cobalt, and the rate of recovery is higher.
Adopted the following technical scheme that to solve the technical problem of the present invention：
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
（1）Broken ore grinding：Copper cobalt slag is broken into below 3mm fine grained, then according to copper cobalt slag, reducing agent and water Ratio is 1：0.05-0.2：1-2 proportioning adds in ball mill and carries out ore grinding, obtains the ore pulp that fineness is -325 mesh 80-95%；
（2）Acidleach copper cobalt：The ore pulp of milled is sent into leaching tanks, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, add sulphur Acid, acidity is reached 20-200g/L, stir, be heated to 90 DEG C -100 DEG C, extraction time 1-3h, filtering, washing, that is, obtain The leachate of cupric, cobalt；
（3）Replace copper：It is 3-4 that the leachate of cupric, cobalt is neutralized into pH value, adds iron powder under normal temperature or iron wire is put Change, the reaction time is 20 min, and reaction temperature is 10 DEG C -40 DEG C, is filtrated to get copper sponge and decopper(ing) liquid；
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 50-70 DEG C, then the lower grass for adding 1-1.1 times of theoretical amount of stirring Acid, obtain cobalt oxalate precipitation.
The step（1）Middle reducing agent is sodium sulfite, sodium pyrosulfite, sodium hydrogensulfite.
The step（3）The middle iron powder for adding 1-1.2 times of theoretical amount or iron wire enter line replacement.
The step（4）Middle available quality concentration is 5-15% oxalic acid solutions, and wherein mass concentration is 5-15% oxalic acid solutions Addition be 1-1.1 times of theoretical amount.
The present invention, ore grinding is reduced using reducing agent first, then acidleach reaches the leachate of cupric cobalt, then uses iron replacement Obtain copper sponge, obtain cobalt oxalate with oxalic acid precipitation.Method provided by the invention, the leaching to copper cobalt slag under normal pressure is realized, Copper, cobalt leaching rate in copper cobalt slag is higher, is separated with other impurities preferably, can reach more than 95%；Environmental pollution is small, production Technique is simple, required equipment cost is low, and product is respectively copper sponge and cobalt oxalate, especially suitable for small-sized smelter to quantity The working process of few cupric cobalt metallurgical slag.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
The present invention is described further below：
Embodiment 1
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
（1）Certain import copper cobalt Copper in Slag 13.52%, cobalt 4.79%.The copper cobalt slag is broken into below 3mm fine grained, so After weigh 100g copper cobalts slag, 5g sodium sulfites and 100g water, be put into wet ball mill ore grinding 10min, obtain fineness be 95%- The ore pulp of 325 mesh.
（2）Above-mentioned ore pulp is fully transferred to beaker, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, stir lower addition quality The sulfuric acid that fraction is 98% makes initial acidity reach 20g/L, opens stirring, and heating water bath is to 90 DEG C, insulation reaction 1h, mistake while hot Filter, washing, that is, obtain copper cobalt leachate, leached mud soaks again once to be discarded afterwards.
（3）Leachate is neutralized to pH value as 4 with sodium carbonate, iron powder 15g is added under stirring at normal temperature and enters line replacement, during reaction Between be 20 min, reaction temperature is 40 DEG C, is filtrated to get the copper sponge 21g of cupric 58%.
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 70 DEG C, is then stirred for down being slowly added to oxalic acid 13.7g, obtains containing cobalt For 31% cobalt oxalate precipitation 13.9g.
Embodiment 2
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
（1）Certain import copper cobalt Copper in Slag 13.52%, cobalt 4.79%.The copper cobalt slag is broken into below 3mm fine grained, so After weigh 100g copper cobalts slag, 10 g sodium pyrosulfites and 100g water, be put into wet ball mill ore grinding 10min, obtain fineness as 95% - 325 mesh ore pulp.
（2）Above-mentioned ore pulp is fully transferred to beaker, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, stir lower addition quality The sulfuric acid that fraction is 98% makes initial acidity reach 20g/L, opens stirring, and heating water bath is to 90 DEG C, insulation reaction 1h, mistake while hot Filter, washing, that is, obtain copper cobalt leachate, leached mud soaks again once to be discarded afterwards.
（3）Leachate is neutralized to pH value as 4 with sodium carbonate, iron powder 17g is added under stirring at normal temperature and enters line replacement, during reaction Between be 20 min, reaction temperature is 40 DEG C, is filtrated to get the copper sponge 24g of cupric 55%.
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 70 DEG C, is then stirred for down being slowly added to oxalic acid 13.7g, obtains containing cobalt For 31% cobalt oxalate precipitation 13.9g.
Embodiment 3
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
（1）Certain import copper cobalt Copper in Slag 13.52%, cobalt 4.79%.The copper cobalt slag is broken into below 3mm fine grained, so After weigh 100g copper cobalts slag, 15 g sodium hydrogensulfites and 100g water, be put into wet ball mill ore grinding 10min, obtain fineness as 95% - 325 mesh ore pulp.
（2）Above-mentioned ore pulp is fully transferred to beaker, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, stir lower addition quality The sulfuric acid that fraction is 98% makes initial acidity reach 20g/L, opens stirring, and heating water bath is to 90 DEG C, insulation reaction 1h, mistake while hot Filter, washing, that is, obtain copper cobalt leachate, leached mud soaks again once to be discarded afterwards.
（3）Leachate is neutralized to pH value as 4 with sodium carbonate, iron powder 17g is added under stirring at normal temperature and enters line replacement, during reaction Between be 20 min, reaction temperature is 40 DEG C, is filtrated to get the copper sponge 22g of cupric 55%.
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 70 DEG C, is then stirred for down being slowly added to oxalic acid 13.5g, obtains containing cobalt For 31% cobalt oxalate precipitation 12.6g.
Embodiment 4
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
（1）Certain import copper cobalt slag, cupric 13.52%, containing cobalt 4.79%.The copper cobalt slag is broken into thin of below 3mm Grain, 100kg copper cobalts slag, 20kg sodium pyrosulfites and 200kg water are then weighed, wet ball mill ore grinding 10min is put into, obtains Fineness is the ore pulp of 80% -325 mesh.
（2）Ore pulp is transferred in leaching tanks, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, stir lower addition mass fraction Initial acidity is reached 200g/L for 98% sulfuric acid, be heated to 100 DEG C, insulation reaction 3h, filter, wash while hot, that is, obtain copper Cobalt leachate, leached mud soaks again once to be discarded afterwards.
（3）It is 3 that leachate is neutralized into pH value with sodium carbonate, and adding iron wire 15kg under stirring at normal temperature enters line replacement, reacts Time is 20 min, and reaction temperature is 10 DEG C, is filtrated to get copper sponge 20kg（Wherein cupric 60%）.
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 50 DEG C, is then stirred for down being slowly added to oxalic acid 14kg, obtains oxalic acid Cobalt precipitates 14kg（Wherein contain cobalt 30%）.
Embodiment 5
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
Wherein step（1）~（3）The step of with embodiment 1（1）~（3）.
Step（4）Using mass concentration, the whole decopper(ing) liquid for obtaining above-mentioned reaction add for the heavy cobalt of 5% oxalic acid solution Then heat is stirred for down being slowly added to the oxalic acid solution 280g that mass concentration is 5%, mass concentration is 5% oxalic acid solution to 50 DEG C Addition be 1.1 times of theoretical amount, obtain cobalt oxalate precipitation 14g（Wherein contain cobalt 30%）.
Embodiment 6
A kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, are carried out as steps described below：
Wherein step（1）~（3）The step of with embodiment 2（1）~（3）.
Step（4）Mass concentration is used as the heavy cobalt of 15% oxalic acid solution, the whole decopper(ing) liquid that above-mentioned reaction will be obtained 70 DEG C are heated to, is then stirred for down being slowly added to the oxalic acid solution 103kg that mass concentration is 15%, mass concentration is 15% oxalic acid The addition of solution is 1 times of theoretical amount, obtains cobalt oxalate precipitation 14kg（Wherein contain cobalt 30%）.

Claims (4)

1. a kind of hydrometallurgical copper recovery of copper cobalt slag, cobalt method, it is characterised in that：Carry out as steps described below：
（1）Broken ore grinding：Copper cobalt slag is broken into below 3mm fine grained, then according to the quality of copper cobalt slag, reducing agent and water Ratio is 1：0.05-0.2：1-2 proportioning adds in ball mill and carries out ore grinding, obtains the ore pulp that fineness is -325 mesh 80-95%；
（2）Acidleach copper cobalt：The ore pulp of milled is sent into leaching tanks, it is 1 to add water to form solid-to-liquid ratio:3 feed liquid, sulfuric acid is added, is made Acidity reaches 20-200g/L, stirs, is heated to 90 DEG C -100 DEG C, extraction time 1-3h, filtering, washing, that is, obtain cupric, The leachate of cobalt；
（3）Replace copper：It is 3-4 that the leachate of cupric, cobalt is neutralized into pH value, adds iron powder under normal temperature or iron wire enters line replacement, Reaction time is 20 min, and reaction temperature is 10 DEG C -40 DEG C, is filtrated to get copper sponge and decopper(ing) liquid；
（4）Oxalic acid sinks cobalt：Decopper(ing) liquid is heated to 50-70 DEG C, then the lower oxalic acid for adding 1-1.1 times of theoretical amount of stirring, Obtain cobalt oxalate precipitation.
2. hydrometallurgical copper recovery, the cobalt method of a kind of copper cobalt slag according to claim 1, it is characterised in that：The step Suddenly（1）Middle reducing agent is sodium sulfite, sodium pyrosulfite, sodium hydrogensulfite.
3. hydrometallurgical copper recovery, the cobalt method of a kind of copper cobalt slag according to claim 1, it is characterised in that：The step Suddenly（3）The middle iron powder for adding 1-1.2 times of theoretical amount or iron wire enter line replacement.
4. hydrometallurgical copper recovery, the cobalt method of a kind of copper cobalt slag according to claim 1 or 2, it is characterised in that：It is described Step（4）Middle available quality concentration is 5-15% oxalic acid solutions, and wherein mass concentration is that the addition of 5-15% oxalic acid solutions is reason By 1-1.1 times of amount of calculation.
CN201610631955.6A 2016-08-04 2016-08-04 Method for recovering copper and cobalt from copper-cobalt slag by wet metallurgy Active CN106222430B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107779594A (en) * 2017-08-31 2018-03-09 广东佳纳能源科技有限公司 A kind of technique for being segmented reducing leaching Africa heterogenite
CN113832344B (en) * 2020-06-08 2022-06-14 中南大学 Method for recovering copper and cobalt from copper-cobalt slag
CN112359212B (en) * 2020-11-24 2022-03-08 江西佳纳能源科技有限公司 Method for recovering cobalt, copper and iron from cobalt slag
CN113174493B (en) * 2021-04-29 2022-07-26 大冶有色金属有限责任公司 Method for recovering copper and cobalt by combined treatment of selenium steaming slag and alkaline cobalt slag
CN114854982A (en) * 2022-05-17 2022-08-05 武钢资源集团大冶铁矿有限公司 Method for recovering copper and cobalt in sulfuric acid residue through gas-based low-temperature reduction roasting-leaching
CN115449640A (en) * 2022-09-05 2022-12-09 中冶瑞木新能源科技有限公司 Recovery processing method for separating and purifying copper slag

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Publication number Priority date Publication date Assignee Title
CN101994003A (en) * 2010-12-10 2011-03-30 中南大学 Process for selectively extracting copper and cobalt from heterogenite
CN102021325A (en) * 2010-12-14 2011-04-20 深圳市格林美高新技术股份有限公司 Method for respectively leaching copper and cobalt from copper and cobalt concentrate
CN103898320A (en) * 2012-12-27 2014-07-02 宁波科博特钴镍有限公司 Beneficiation method of heterogenite
CN104232936A (en) * 2013-06-13 2014-12-24 无锡市森信精密机械厂 Technology for producing cobalt oxide by low-grade copper cobalt ore

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101994003A (en) * 2010-12-10 2011-03-30 中南大学 Process for selectively extracting copper and cobalt from heterogenite
CN102021325A (en) * 2010-12-14 2011-04-20 深圳市格林美高新技术股份有限公司 Method for respectively leaching copper and cobalt from copper and cobalt concentrate
CN103898320A (en) * 2012-12-27 2014-07-02 宁波科博特钴镍有限公司 Beneficiation method of heterogenite
CN104232936A (en) * 2013-06-13 2014-12-24 无锡市森信精密机械厂 Technology for producing cobalt oxide by low-grade copper cobalt ore

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