CN103409621A - Combined leaching method for high-iron zinc sulfide concentrate and high-iron zinc calcine leaching slag - Google Patents

Combined leaching method for high-iron zinc sulfide concentrate and high-iron zinc calcine leaching slag Download PDF

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Publication number
CN103409621A
CN103409621A CN2013103080605A CN201310308060A CN103409621A CN 103409621 A CN103409621 A CN 103409621A CN 2013103080605 A CN2013103080605 A CN 2013103080605A CN 201310308060 A CN201310308060 A CN 201310308060A CN 103409621 A CN103409621 A CN 103409621A
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China
Prior art keywords
zinc
leaching
iron
sulfide concentrate
calcine
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CN2013103080605A
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Chinese (zh)
Inventor
邓志敢
魏昶
李存兄
张帆
樊刚
李兴彬
李旻廷
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INDUSTRY MANAGEMENT Ltd KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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INDUSTRY MANAGEMENT Ltd KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Priority to CN2013103080605A priority Critical patent/CN103409621A/en
Publication of CN103409621A publication Critical patent/CN103409621A/en
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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

Abstract

The invention belongs to the technical field of zinc hydrometallurgy, and particularly relates to a combined leaching method for high-iron zinc sulfide concentrate and high-iron zinc calcine leaching slag. The method comprises a step of mixing the high-iron zinc sulfide concentrate and the high-iron zinc calcine leaching slag according to a mass ratio of 0.15:1-0.35:1; a step of adopting a solution containing 160-190 g/L of sulfur acid as a leaching agent; a step of adding 1-3 kg sodium lignosulphonate per ton zinc concentrate allowing that the liquid-solid ratio is 6-8 mL/g; and a step of reacting at 85-95 DEG C for 2-4 h under stirring to leach out valuable metals comprising zinc, indium and copper and to reduce Fe<3+> to Fe<2+>. According to the method, a hot-acid leaching technology of zinc leaching slag and a high-iron leaching solution reduction technology are combined to be completed in a process, thereby improving the leaching rate of the valuable metals, achieving efficient reduction of the Fe<3+>, and contributing to subsequent extraction of the zinc, the copper and the indium. The method is characterized by being short in technology process, clean, efficient, energy-saving, and the like.

Description

High-iron zinc sulfide concentrate is combined the method for leaching with high ferro zinc calcine leaching process slag
Technical field
The invention belongs to the hydrometallurgy field of zinc, particularly relate to a kind of high-iron zinc sulfide concentrate and with high ferro zinc calcine leaching process slag, combine the method for leaching.
Background technology
Iron is the highest a kind of impurity of content beyond sulphur removal in high-iron zinc sulfide concentrate, and the iron of association in zinc ore concentrate mostly exists to replace the form of dodging zinc in zinc, thus zinc-iron to separate be the important component part that zinc is smelted.
In the high-iron zinc sulfide concentrate roasting process, inevitably produce a large amount of zinc ferrites, zinc ferrite is not destroyed at neutral leaching process, stays in neutral leaching residue with not dissolved zinc oxide.It is a kind of effective ways that destroy zinc ferrite that hot acid leaches, and can realize the efficient leaching of zinc, but when the leaching yield of zinc brought up to 95%, the leaching yield of iron is also up to more than 95%, and the iron major part is with Fe 3+Form exists.At present, from the method for separation of iron this solution, mainly contain jarosite process, goethite process and hematite process.Owing in Jarosite Residues, containing the harmful elements such as a large amount of lead, cadmium, arsenic, zinc, serious because of environmental pollution, the application of this method for removing iron is restricted.While adopting goethite process or hematite process deironing, must be by the Fe in high iron solution 3+Be reduced to Fe 2+, therefore usually adopt hot acid leaching-leach liquor reduction-pyrrhosiderite or rhombohedral iron ore deferrization process to reclaim the zinc in the high ferro leached mud, and realize that zinc-iron separates.The problems such as the method exists zinc in material, indium, copper valuable metal leaching yield is low, technical process is complicated, energy consumption is high.
Summary of the invention
The objective of the invention is to have the weak point for the treatment of technology now and provide a kind of high ferro zinc calcine leaching process slag with high-iron zinc sulfide concentrate, to combine the method for leaching for above-mentioned high ferro zinc leaching residue.Ferric oxygenizement in reductive action by metallic sulfide in high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag, realize the purpose of the efficient leaching of valuable metal zinc, indium, copper in high ferro zinc calcine leaching process slag, simultaneously by the Fe more than 90% in leach liquor 3+Be reduced to Fe 2+, traditional zinc leaching residue hot acid leaching is merged into to an operation with the leach liquor reducing process and completes.
Realize the technical scheme that the object of the invention is taked: high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag 0.15:1～0.35:1 in mass ratio mix, leaching agent is the solution of sulfur acid 160～190g/L, by zinc ore concentrate per ton, add again 1～3kg wooden sodium sulfonate, leach liquid-solid ratio 6～8mL/g, 85～95 ℃ of temperature of reaction, under agitation condition, reacted 2～4 hours, and zinc, indium, copper valuable metal were leached, simultaneously by Fe 3+Be reduced to Fe 2+, make after liquid-solid separation Fe in leach liquor 3+Be less than 3 g/L.
Described high-iron zinc sulfide concentrate contains zinc 35～46wt%, iron content 16～25wt%, contains indium 300～1200g/t, cupric 0.1～1.5wt%, contains in addition the valuable metals such as silver, lead, and the leaching agent of sulfur acid solution adopts the electrolysis waste solution of zinc electrodeposition.
Described high ferro zinc calcine leaching process slag is zinc roasted ore neutral leaching residue or low acid leaching slag, contains zinc 15～30wt%, iron content 24～40wt%, contains indium 400～2800g/t, cupric 0.15～3wt%.
Described zinc electrodeposition waste liquid is sulfur acid 160～190g/L, contains the zinc electrodeposition waste liquid of zinc≤55g/L.
The invention has the beneficial effects as follows: the zinc ferrite in high ferro zinc calcine leaching process slag dissolves and obtains Fe in the hot acid leaching process 3+, Fe 3+With metallic sulfide generation redox reactions such as zinc in high-iron zinc sulfide concentrate, iron, copper, indiums, by Fe 3+Be reduced to Fe 2+And the dissolving of zinc, indium, copper in the promotion material, improved the valuable metal leaching yield, realize that the leaching yield of zinc, indium, copper reaches respectively 95%, 94%, more than 96%, Fe 3+Reduction ratio reach more than 90%, Fe in solution 3+Be less than 3 g/L.High-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag combined leaching process have been simplified the Zinc hydrometallurgy process flow process, reduce production energy consumption.
Specific embodiment
Embodiment mono-:
1. material chemical component and each composition weight percent:
The chemical composition of high-iron zinc sulfide concentrate of taking from certain zinc hydrometallurgy enterprise is as follows: zinc 35wt%, iron 25wt%, indium 780g/t, copper 0.85wt%;
The chemical composition of taking from certain zinc hydrometallurgy enterprise high ferro zinc calcine leaching process slag is as follows: zinc 30wt%, iron 40wt%, indium 1120g/t, copper 1.29 wt%.
2, hot acid is combined leaching:
(1) by high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag in mass ratio 0.35:1 mix, with the sulphuric acid soln of 190g/L, size mixing, liquid-solid ratio leaches liquid-solid ratio 6mL/g;
(2) process control: add 3kg/t concentrate wooden sodium sulfonate, 89 ℃～92 ℃ of temperature, 4 hours lower reaction times of agitation condition.The leaching yield of zinc is 95.1%, and the leaching yield of indium is 94.8%, the leaching yield of copper is 96.3%, Fe in solution 3+Concentration is 2.8 g/L.
Embodiment bis-:
1. material chemical component and each composition weight percent:
The chemical composition of high-iron zinc sulfide concentrate of taking from certain zinc hydrometallurgy enterprise is as follows: zinc 46wt%, iron 16wt%, indium 1200g/t, copper 1.48wt%;
The chemical composition of taking from certain zinc hydrometallurgy enterprise high ferro zinc calcine leaching process slag is as follows: zinc 15wt%, iron 24wt%, indium 2750g/t, copper 2.97wt%.
2, hot acid is combined leaching:
(1) by high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag in mass ratio 0.15:1 mix, with the sulphuric acid soln of 180g/L, size mixing, liquid-solid ratio leaches liquid-solid ratio 7mL/g;
(2) process control: add 1kg/t concentrate wooden sodium sulfonate, 92 ℃～95 ℃ of temperature, 2 hours lower reaction times of agitation condition.The leaching yield of zinc is 95.3%, and the leaching yield of indium is 95.6%, the leaching yield of copper is 97.2%, Fe in solution 3+Concentration is 2.1g/L.
Embodiment tri-:
1. material chemical component and each composition weight percent:
The chemical composition of high-iron zinc sulfide concentrate of taking from certain zinc hydrometallurgy enterprise is as follows: zinc 42wt%, iron 19wt%, indium 300g/t, copper 0.1wt%;
The chemical composition of taking from certain zinc hydrometallurgy enterprise high ferro zinc calcine leaching process slag is as follows: zinc 25wt%, iron 29wt%, indium 465g/t, copper 0.15wt%.
2, hot acid is combined leaching:
(1) by high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag in mass ratio 0.25:1 mix, with the sulphuric acid soln of 160g/L, size mixing, liquid-solid ratio leaches liquid-solid ratio 8mL/g;
(2) process control: add 2kg/t concentrate wooden sodium sulfonate, 85 ℃～88 ℃ of temperature, 3 hours lower reaction times of agitation condition.The leaching yield of zinc is 96.5%, and the leaching yield of indium is 94.1%, the leaching yield of copper is 96.3%, Fe in solution 3+Concentration is 2.5g/L.

Claims (4)

1. a high-iron zinc sulfide concentrate is combined the method for leaching with high ferro zinc calcine leaching process slag, it is characterized in that: high-iron zinc sulfide concentrate and high ferro zinc calcine leaching process slag 0.15:1～0.35:1 in mass ratio mix, leaching agent is the solution of sulfur acid 160～190g/L, by zinc ore concentrate per ton, add again 1～3kg wooden sodium sulfonate, leach liquid-solid ratio 6～8mL/g, 85～95 ℃ of temperature of reaction, reacted under agitation condition 2～4 hours, zinc, indium, copper valuable metal are leached, simultaneously by Fe 3+Be reduced to Fe 2+, make after liquid-solid separation Fe in leach liquor 3+Be less than 3 g/L.
2. high-iron zinc sulfide concentrate according to claim 1 is combined the method for leaching with high ferro zinc calcine leaching process slag, it is characterized in that: described high-iron zinc sulfide concentrate contains zinc 35～46wt%, iron content 16～25wt%, contains indium 300～1200g/t, cupric 0.1～1.5wt%, contain in addition silver, plumbous valuable metal, the leaching agent of sulfur acid solution adopts the electrolysis waste solution of zinc electrodeposition.
3. high-iron zinc sulfide concentrate according to claim 1 and 2 is combined the method for leaching with high ferro zinc calcine leaching process slag, it is characterized in that: described high ferro zinc calcine leaching process slag is zinc roasted ore neutral leaching residue or low acid leaching slag, contains zinc 15～30wt%, iron content 24～40wt%, contains indium 400～2800g/t, cupric 0.15～3wt%.
4. high-iron zinc sulfide concentrate according to claim 2 is combined the method for leaching with high ferro zinc calcine leaching process slag, it is characterized in that: described zinc electrodeposition waste liquid is sulfur acid 160～190g/L, contains the zinc electrodeposition waste liquid of zinc≤55g/L.
CN2013103080605A 2013-07-22 2013-07-22 Combined leaching method for high-iron zinc sulfide concentrate and high-iron zinc calcine leaching slag Pending CN103409621A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627911A (en) * 2013-12-09 2014-03-12 株洲冶炼集团股份有限公司 Treatment process for high-iron zinc oxide
CN103643036A (en) * 2013-12-20 2014-03-19 广西冶金研究院 Method for processing roasted sand containing iron, indium and zinc through hot-pressing selective leaching
CN103805780A (en) * 2014-02-13 2014-05-21 昆明理工大学科技产业经营管理有限公司 Method for removing iron and fluorine through synergistic leaching solution of leaching residues in high iron-bearing zinc calcine and high iron-bearing zinc sulfide concentrate
CN103934096A (en) * 2014-04-03 2014-07-23 广东省工业技术研究院(广州有色金属研究院) Mixed copper ore recycling method
CN106868306A (en) * 2016-12-23 2017-06-20 河南豫光锌业有限公司 A kind of method of zinc leaching residue valuable metal high efficiente callback
CN112119170A (en) * 2018-06-29 2020-12-22 威妥有限公司 Method for recovering non-ferrous metals from industrial mineral residues
CN112578077A (en) * 2020-11-11 2021-03-30 韶关凯鸿纳米材料有限公司 Zinc recovery method for silicon dioxide detection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101003854A (en) * 2007-01-22 2007-07-25 中国科学院过程工程研究所 New method for soaking out enriched ores of high indium, high iron, and high sulfur zinc
CN102352445A (en) * 2011-09-23 2012-02-15 来宾华锡冶炼有限公司 Zinc leached residue hot acid reduction leaching method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101003854A (en) * 2007-01-22 2007-07-25 中国科学院过程工程研究所 New method for soaking out enriched ores of high indium, high iron, and high sulfur zinc
CN102352445A (en) * 2011-09-23 2012-02-15 来宾华锡冶炼有限公司 Zinc leached residue hot acid reduction leaching method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627911A (en) * 2013-12-09 2014-03-12 株洲冶炼集团股份有限公司 Treatment process for high-iron zinc oxide
CN103627911B (en) * 2013-12-09 2015-01-14 株洲冶炼集团股份有限公司 Treatment process for high-iron zinc oxide
CN103643036A (en) * 2013-12-20 2014-03-19 广西冶金研究院 Method for processing roasted sand containing iron, indium and zinc through hot-pressing selective leaching
CN103805780A (en) * 2014-02-13 2014-05-21 昆明理工大学科技产业经营管理有限公司 Method for removing iron and fluorine through synergistic leaching solution of leaching residues in high iron-bearing zinc calcine and high iron-bearing zinc sulfide concentrate
CN103934096A (en) * 2014-04-03 2014-07-23 广东省工业技术研究院(广州有色金属研究院) Mixed copper ore recycling method
CN106868306A (en) * 2016-12-23 2017-06-20 河南豫光锌业有限公司 A kind of method of zinc leaching residue valuable metal high efficiente callback
CN112119170A (en) * 2018-06-29 2020-12-22 威妥有限公司 Method for recovering non-ferrous metals from industrial mineral residues
CN112578077A (en) * 2020-11-11 2021-03-30 韶关凯鸿纳米材料有限公司 Zinc recovery method for silicon dioxide detection

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Application publication date: 20131127