CN103725887A - Method for leaching copper sponge - Google Patents
Method for leaching copper sponge Download PDFInfo
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- CN103725887A CN103725887A CN201310677154.XA CN201310677154A CN103725887A CN 103725887 A CN103725887 A CN 103725887A CN 201310677154 A CN201310677154 A CN 201310677154A CN 103725887 A CN103725887 A CN 103725887A
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- copper
- leaching
- nickel
- sponge
- copper sponge
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a method for leaching copper sponge and relates to a method for leaching nickel, cobalt and copper from copper-slag containing copper sponge produced in the process of smelting and refining copper and nickel. The method is characterized in that during the leaching process, sulfuric acid is used as the leaching reagent, oxygen is used as the leaching oxidizing agent, and nickel, cobalt and copper are obtained from copper sponge through pressurization, oxidation and leaching. The method has the following advantages: under the condition, the leaching rates of copper, nickel and cobalt can be greater than 99% through performing pressurization, oxidation and leaching on the copper sponge; in addition, the concentration of copper ions in the lixivium can reach 90 g /L, the concentration of nickel ions can reach (5-7) g/L, and the pH value is 1.0-1.5. With adoption of the technological method, the requirements of industrial production and application are completely met, and precious metals in the copper sponge are gathered in the leaching slag.
Description
Technical field
Leach a method for copper sponge, relate to and a kind ofly from copper nickel, smelting and refining produces the method that contains leaching nickel, cobalt, copper copper ashes-copper sponge.
Background technology
Copper sponge is that a kind of copper content that copper nickel is smelted and refining produces is high, impurity component more complicated containing copper ashes, one of its main raw material for mantoquita production.Mantoquita that the copper sponge of take is raw material is produced existing treatment process as go out → P204 of sulfurization roasting → pulp water logging extracting and separating copper nickel.Mainly there is following problem in existing treatment process: (1), to the adaptability of complex feedstock is not strong, leaching yield is not high, the quantity of slag is larger in production application; (2) concentration of precious metal degree is low, is unfavorable for the extraction of precious metal; (3) in sulfurization roasting process, can produce a large amount of sulfur dioxide gas, along with further strict to metallurgical furnace kiln standard limit of smog release of country, in discharged gas fume, sulfur dioxide concentration is by former 850mg/nm
3be reduced to 400mg/nm
3, environmental protection pressure increases, and environment protection treating running cost is high.Therefore select more advanced extract technology to process copper sponge, for the economic target that develops skill, reduce environmental protection pressure, reduction production run cost, better realizes economic benefit and social benefit tool is of great significance.
Summary of the invention
Object of the present invention is exactly the deficiency existing for above-mentioned prior art, provides a kind of leaching result much of thatly to meet need of production, without obnoxious flavour, emits, and is conducive to the method for leaching copper sponge of the further extraction of precious metal.
The object of the invention is to be achieved through the following technical solutions.
Leach a method for copper sponge, it is characterized in that its leaching process is to take sulfuric acid as leaching reagent, take oxygen as leaching oxygenant, nickel, cobalt, the copper in copper sponge material is leached in pressure oxidation.
A kind of method that leaches copper sponge of the present invention, is characterized in that the concrete steps of its leaching process, at copper sponge raw material, add the sulfuric acid of 1～1.2 times of molar mass by elemental metals amount wherein, then adds the solid mass ratio 8:1 of water regulator solution; Add in reaction autoclave sealing autoclave; Autoclave is risen to 140～160 ℃ of temperature, pass into air in replacement of oxygen still, and to improve oxygen partial pressure in still be that 0.1～0.3MPa reacts, the reaction times is 2-3 hour.
A kind of method that leaches copper sponge of the present invention, its its main component of copper sponge raw material is elemental copper, is mingled with a small amount of anode sludge simultaneously, places in the open after for some time, part elemental copper is oxidized to cupric oxide.Its main chemical compositions (%): Cu 65.7～77.82, Ni 2～5, Fe 0.06, Pb 0.02, Ca 0.13, As 0.4, Sb 0.24, Bi 0.025, S 2.8, Cl～2.3.Copper sponge is carried out to pressure oxidation leaching, can be by the leaching of more than 99% copper, nickel, cobalt in copper sponge, the quantity of slag is less.And in leach liquor, copper ion concentration copper ion concentration reaches 90g/L left and right, nickel ion concentration 5g/L～7g/L, pH value 1.0～1.5, leach result and reached the requirement of suitability for industrialized production: be i.e. copper ion concentration >=60g/L in leach liquor, nickel ion concentration 10g/L left and right, residual sour pH=1.5～2, leaching yield >=95% of nickel, copper, cobalt, can meet the needs of production completely.In addition, carry out with this understanding copper sponge pressure oxidation leaching, without obnoxious flavour, emit, simultaneously by concentration of precious metal in leached mud, be conducive to the further extraction of precious metal.
Embodiment
Leach a method for copper sponge, leaching process, at copper sponge raw material, adds the sulfuric acid of 1～1.2 times of molar mass by elemental metals amount wherein, then adds the solid mass ratio 8:1 of water regulator solution; Add in reaction autoclave sealing autoclave.Autoclave is risen to 140～160 ℃ of temperature, pass into air in replacement of oxygen still, and to improve oxygen partial pressure in still be that 0.1～0.3Mpa reacts, reaction 2-3 hour.
Embodiment 1
Accurately weigh copper sponge raw material 1kg, measure 7246mL tap water, add 700mL industrial sulphuric acid, pack in reaction autoclave sealing autoclave into.Heating high-pressure still temperature to 160 ℃, with air in industrial oxygen displacement still, substitution gas is outer row directly, and controlling still internal pressure is 0.8MPa, after 3 hours reaction times, filters, and the leaching yield of copper reaches 99.5%, nickel leaching yield 99.2%, cobalt leaching yield 99.1%.Copper content 93.1 g/L in leach liquor, nickel content 5.6 g/L, cobalt contents 1.3 g/L, pH value 1.2.
Embodiment 2
Accurately weigh copper sponge raw material 1kg, add 637mL industrial sulphuric acid, 7363mL water, packs in reaction autoclave sealing autoclave into.Heating high-pressure still temperature to 150 ℃, with air in pure oxygen displacement still, substitution gas is outer row directly, and controlling still internal pressure is 0.7MPa, 3 hours reaction times.The leaching yield of copper reaches 99.7%, nickel leaching yield 99.6%, cobalt leaching yield 99.1%.Copper content 90.2 g/L in leach liquor, nickel content 5.2 g/L, cobalt contents 1.5 g/L, pH value 1.1.
Embodiment 3
Accurately weigh copper sponge raw material 1kg, add 764mL industrial sulphuric acid, 9300mL water, packs in reaction autoclave sealing autoclave into.Heating high-pressure still temperature to 140 ℃, with air in pure oxygen displacement still, substitution gas is outer row directly, and controlling still internal pressure is 0.6MPa, 2 hours reaction times.The leaching yield of copper reaches 99.3%, nickel leaching yield 99.7%, cobalt leaching yield 99.2%.Copper content 91.5 g/L in leach liquor, nickel content 5.8 g/L, cobalt contents 1.4 g/L, pH value 1.3.
Claims (3)
1. leach a method for copper sponge, it is characterized in that its leaching process is to take sulfuric acid as leaching reagent, take oxygen as leaching oxygenant, nickel, cobalt, the copper in copper sponge material is leached in pressure oxidation.
2. a kind of method that leaches copper sponge according to claim 1, is characterized in that the concrete steps of its leaching process, at copper sponge raw material, add the sulfuric acid of 1～1.2 times of molar mass by elemental metals amount wherein, then adds the solid mass ratio 8:1 of water regulator solution; Add in reaction autoclave sealing autoclave; Autoclave is risen to 140～160 ℃ of temperature, pass into air in replacement of oxygen still, and to improve oxygen partial pressure in still be that 0.1～0.3MPa reacts, the reaction times is 2-3 hour.
3. a kind of method that leaches copper sponge according to claim 1, is characterized in that described its main component of copper sponge raw material is elemental copper, is mingled with the anode sludge simultaneously, places in the open after for some time, and part elemental copper is oxidized to cupric oxide; Its main chemical compositions (%): Cu 65.7～77.82, Ni 2～5, Fe 0.06, Pb 0.02, Ca 0.13, As 0.4, Sb 0.24, Bi 0.025, S 2.8, Cl-2.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677154.XA CN103725887A (en) | 2013-12-13 | 2013-12-13 | Method for leaching copper sponge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677154.XA CN103725887A (en) | 2013-12-13 | 2013-12-13 | Method for leaching copper sponge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103725887A true CN103725887A (en) | 2014-04-16 |
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| CN201310677154.XA Pending CN103725887A (en) | 2013-12-13 | 2013-12-13 | Method for leaching copper sponge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611572A (en) * | 2015-01-13 | 2015-05-13 | 武汉工程大学 | Method for preparing copper sulfate through wet oxidation of copper concentrate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1392902A (en) * | 2000-09-18 | 2003-01-22 | 英科有限公司 | Recovery of nickel and cobalt values from sulfidic flotation concentrate by chloride assisted oxidative pressure leaching in sulfuric acid |
| CN103233127A (en) * | 2013-05-08 | 2013-08-07 | 金川集团股份有限公司 | Method for separating base metal from precious metal in copper anode mud |
-
2013
- 2013-12-13 CN CN201310677154.XA patent/CN103725887A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1392902A (en) * | 2000-09-18 | 2003-01-22 | 英科有限公司 | Recovery of nickel and cobalt values from sulfidic flotation concentrate by chloride assisted oxidative pressure leaching in sulfuric acid |
| CN103233127A (en) * | 2013-05-08 | 2013-08-07 | 金川集团股份有限公司 | Method for separating base metal from precious metal in copper anode mud |
Non-Patent Citations (1)
| Title |
|---|
| 王吉坤等: "《铜阳极泥现代综合利用技术》", 31 January 2008, article "7.2.2.1高压浸出", pages: 190-191 - 7.2.2.1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104611572A (en) * | 2015-01-13 | 2015-05-13 | 武汉工程大学 | Method for preparing copper sulfate through wet oxidation of copper concentrate |
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Application publication date: 20140416 |