CN102839285B - Method for recovering copper from waste mine rocks - Google Patents
Method for recovering copper from waste mine rocks Download PDFInfo
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- CN102839285B CN102839285B CN201210331024.6A CN201210331024A CN102839285B CN 102839285 B CN102839285 B CN 102839285B CN 201210331024 A CN201210331024 A CN 201210331024A CN 102839285 B CN102839285 B CN 102839285B
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- copper
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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 recovering copper from waste mine rocks, and the method comprises the steps of collecting copper-bearing acid water, preprocessing, preparing filtering materials, conducting exchange adsorption and postprocessing. Particularly, acid draining water is collected from a mine dump yard leached by rainwater, the collected acid draining water is sprayed onto the surfaces of the waste mine rocks, and leaching liquid is collected and sprayed circularly till the content of the copper ion in the leaching liquid is 50-1000mg/L, thereby obtaining the copper-bearing acid water; and the copper-bearing acid water is preprocessed and then injected into a filter column with the filtering materials, so that the copper is recovered by the exchange absorption. The method is simple and low in cost, and the recovery rate of the copper reaches above 85%.
Description
One, technical field
The present invention relates to a kind of method that reclaims copper from chats.
Two, technical background
Metal mine, as iron ore, copper mine, polymetallic ore mountain etc., in ore extraction process, produce a large amount of waste rock (claiming again chats), these waste rock are generally the country rocks of ore body, be subject to mineralising to a certain extent, metal content is higher than common rocks, because useful metal content does not wherein reach prior art, selects smelting requirement to discard.
Chats granularity is large, and voidage is high, and perviousness is strong, and rain water and air easily permeates wherein, and the sulfide long-term exposure in barren rock, in air, due to the oxygenizement that chemical oxidation, microorganism strengthen, produces serious acid mine drainage.Acid mine drainage causes serious heavy metal contamination and environmental destruction, and each metal mine is all an ecological time bomb.Even if mine is closed, still long-term existence of the danger of this ecology.
Chats generation is huge, contains again micro-heavy metal, and how cost-effective disposal is the difficult problem that bargh faces always.If making has a cost-effective recycling of valency heavy metal in chats, not only reduce discharge and the harm of heavy metal to ecotope of pollutent, and extracted metal wherein, contribute to alleviate resource anxiety.
Three, summary of the invention
The present invention aims to provide a kind of method that reclaims copper from chats, and the valency heavy metal that has in chats is effectively recycled, and reduces discharge and the harm of heavy metal to ecotope of pollutent.
The present invention reclaims the method for copper from chats, comprises the each unit process of preparation, exchange adsorption and aftertreatment of collecting cupric sour water, pre-treatment, filtrate:
Described collection cupric sour water is near chats stockyard, to build sour water storehouse, collect the acid effluent that chats produces because of rainwater leaching, the acid effluent of collection is sprayed to the surface of chats according to the ratio of chats and acid effluent volume ratio 100-1:1, reacting between artificial-strengthening chats and acid effluent, copper in leaching stripping chats, collecting leachate circulated sprinkling to content of copper ion in leachate is that 50-1000mg/L obtains cupric sour water;
Described pre-treatment be by described cupric sour water take filter mode by thickness the Wingdale as 2-20mm, collect filtrate obtain pretreated cupric sour water, make the pH value stabilization of sour water between 4-6;
The preparation of described filtrate is the filtrate that Colloid form pyrite crushing and screening is obtained to 0.25-2mm, or Colloid form pyrite crushing and screening is obtained to the pellet of 0.25-2mm, described pellet is placed in to nitrogen atmosphere and in 500-800 ℃ of calcining, within 0.5-2 hour, obtains filtrate;
Described exchange adsorption is by described filtrate filling filter post, in filter post, inject pretreated cupric sour water, hydraulic detention time is controlled at 0.5-10 hour, water outlet enters the spray-water of tank as chats leaching copper after filtering, when water outlet content of copper ion >=1mg/L, stop into water, the filtrate taking out in filter post send copper smelting plant to smelt recovery metallic copper.
The particle diameter of described filtrate is preferably 0.25-0.5mm, 0.5-1mm or 1-2mm.
Contriver is through experimental studies have found that, in the acid effluent in chats stockyard, there is acidophilia autotrophic microorganism, by drenching acid mine drainage waste to chats stockyard artificial mark spraying, can promote copper-bearing mineral weathering in chats, oxygenizement and copper discharge, and arsenic and other heavy metals are trapped in barren rock because being adsorbed by iron hydroxide, spray acid waste water part is evaporated, thereby realize the decrement of acid effluent, and obtain the cupric sour water of high cupric concentration, improved the concentration of cupric ion compared with rainwater natural leaching, more than in leachate, copper ion concentration reaches 100mg/L, range up to 1000mg/L.
In chats sour water leachate, not only contain the copper of high density, contain magnesium, calcium, ammonia, the sulfate radical plasma of high density simultaneously, Colloid form pyrite and the cupric ion generation permutoid reaction after Colloid form pyrite or calcining found in experiment, make cupric ion in solution optionally be converted into the sulfide of copper and enrichment, by cheap material and simple method, make the separation of cupric ion and other impurity compositions in water, realize the recovery of copper.
Contriver shows porphyrite iron ore barren rock and acid effluent monitoring thereof, in porphyrite iron ore barren rock, contain micro-copper and mainly compose and exist in sulfide, in chats acid effluent, contain the cupric ion of high density, this is the result that barren rock medium sulphide content is discharged by rainwater leaching weathering copper part; By artificial spray, especially sour water spray, can strengthen the release of copper-bearing mineral weathering oxygenizement and copper in barren rock, obtains cupric sour water, has improved the concentration of cupric ion compared with natural rainwater leaching.This cupric sour water can further utilize the permutoid reaction of natural nano iron sulfide and cupric ion to be converted into the sulfide of copper and enrichment, and this method that reclaims copper from barren rock has the advantages that cost is low.
The inventive method is simple, with low cost, and the rate of recovery of copper can reach more than 85%.
Four, embodiment
Embodiment 1:
1, gather porphyrite iron ore barren rock, particle diameter is 4-50mm, broken 100 mesh sieves of crossing, and mass concentration 5% dissolving with hydrochloric acid, measuring the molten content that extracts copper of acid in barren rock is 0.047%.
2, get the acid effluent 50L of porphyrite iron ore barren rock, measure dissolved constituent wherein, Cu
2+concentration is 51.4mg/L.Build Leaching Experiments post, diameter 100mm, high 1500mm, by the broken porphyrite iron ore barren rock 1mm sieve of crossing, filling Leaching Experiments post, with 1L porphyrite iron ore barren rock acid effluent mixings 9L tap water, with the flow of 100mL per hour to testing post circulated sprinkling 10 days, collect leachate and obtain cupric sour water, measure the dissolved copper ionic concn 62mg/L in cupric sour water.
3, Colloid form pyrite ore reduction, screening are obtained to the filtrate of particle diameter 0.25-0.5mm, the filter post of filling diameter 10mm, high 50mm;
4, cupric sour water is flow through to the Wingdale filter bed of thickness 2-4mm with filter type, make the pH value stabilization of cupric sour water at 4-5, obtain pretreated cupric sour water;
5, pretreated cupric sour water is injected to filter post and reclaim copper wherein, hydraulic detention time 8h, filters water outlet and enters leaching tank, and the spray-water leaching as copper in chats, realizes the closed cycle of water;
6, when copper ion concentration is greater than 1mg/L in the water outlet of filter post, stop into water, take out the filtrate in filter post, measure the content of copper, the rate of recovery of calculating copper is 85%.
7, rich copper filtrate directly send copper smelting plant, according to conventional copper smelting technology, reclaims.
Embodiment 2:
1, gather porphyrite iron ore barren rock, particle diameter is 1-10mm, broken 100 mesh sieves of crossing, and mass concentration 5% dissolving with hydrochloric acid, measuring the molten content that extracts copper of acid in barren rock is 0.052%.
2, get the acid effluent 50L of porphyrite iron ore barren rock, measure dissolved constituent wherein, Cu
2+concentration is 51.4mg/L.Build Leaching Experiments post, diameter 100mm, high 1500mm, by the broken porphyrite iron ore barren rock 1mm sieve of crossing, filling Leaching Experiments post, with 1L porphyrite iron ore barren rock acid effluent mixings 9L tap water, with the flow of 100mL per hour to testing post circulated sprinkling 10 days, collect leachate and obtain cupric sour water, measure the dissolved copper ionic concn 58mg/L in cupric sour water.
3, Colloid form pyrite ore reduction, screening are obtained to the pellet of particle diameter 0.25-0.5mm, described pellet is calcined to 0.5h under 600 ℃ of nitrogen protections, the filter post of filling diameter 10mm, high 50mm;
4, cupric sour water is flow through to the Wingdale filter bed of thickness 2-4mm with filter type, make the pH value stabilization of cupric sour water at 5-6, obtain pretreated cupric sour water;
5, pretreated cupric sour water is injected to filter post and reclaim copper wherein, hydraulic detention time 2h, filters water outlet and enters leaching tank, and the spray-water leaching as copper in chats, realizes the closed cycle of water;
6, when copper ion concentration is greater than 1mg/L in the water outlet of filter post, stop into water, take out the filtrate in filter post, measure the content of copper, the rate of recovery of calculating copper is 87%;
7, rich copper filtrate directly send copper smelting plant, according to conventional copper smelting technology, reclaims.
Claims (2)
1. from chats, reclaim a method for copper, comprise the each unit process of preparation, exchange adsorption and aftertreatment of collecting cupric sour water, pre-treatment, filtrate, it is characterized in that:
Described collection cupric sour water is to collect the acid effluent that the rainwater leaching of chats stockyard produces, the acid effluent of collection is sprayed to the surface of chats according to the ratio of chats and acid effluent volume ratio 100-1:1, collecting leachate circulated sprinkling to content of copper ion in leachate is that 50-1000mg/L obtains cupric sour water;
Described pre-treatment be by described cupric sour water take filter mode by thickness the Wingdale as 2-20mm, collect filtrate obtain pretreated cupric sour water;
The preparation of described filtrate is the pellet that Colloid form pyrite crushing and screening is obtained to 0.25-2mm, described pellet is placed in to nitrogen atmosphere and in 500-800 ℃ of calcining, within 0.5-2 hour, obtains filtrate;
Described exchange adsorption is by described filtrate filling filter post, in filter post, injects pretreated cupric sour water, and hydraulic detention time is controlled at 0.5-10 hour, when water outlet content of copper ion >=1mg/L, stops into water, and the filtrate in taking-up filter post is smelted and reclaimed metallic copper.
2. the method for recovery copper according to claim 1, is characterized in that:
The particle diameter of described filtrate is 0.25-0.5mm, 0.5-1mm or 1-2mm.
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| CN201210331024.6A CN102839285B (en) | 2012-09-10 | 2012-09-10 | Method for recovering copper from waste mine rocks |
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| CN201210331024.6A CN102839285B (en) | 2012-09-10 | 2012-09-10 | Method for recovering copper from waste mine rocks |
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| CN102839285B true CN102839285B (en) | 2014-04-23 |
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Citations (3)
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|---|---|---|---|---|
| CN1618742A (en) * | 2004-11-24 | 2005-05-25 | 李泽唐 | Method of treating nonferrons metal mine acidic waste water source |
| CN101628773A (en) * | 2009-08-04 | 2010-01-20 | 紫金矿业集团股份有限公司 | Treatment process of copper-iron-contained high-concentration acidic mine wastewater |
| CN101723487A (en) * | 2009-12-21 | 2010-06-09 | 昆明理工大学 | Method for recovering copper in copper-containing acid waste water of mine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4199821B1 (en) * | 2008-01-15 | 2008-12-24 | 株式会社荏原製作所 | Method and apparatus for removing and recovering copper from copper-containing acidic waste liquid |
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- 2012-09-10 CN CN201210331024.6A patent/CN102839285B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618742A (en) * | 2004-11-24 | 2005-05-25 | 李泽唐 | Method of treating nonferrons metal mine acidic waste water source |
| CN101628773A (en) * | 2009-08-04 | 2010-01-20 | 紫金矿业集团股份有限公司 | Treatment process of copper-iron-contained high-concentration acidic mine wastewater |
| CN101723487A (en) * | 2009-12-21 | 2010-06-09 | 昆明理工大学 | Method for recovering copper in copper-containing acid waste water of mine |
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| 张楠等.铜陵相思谷尾矿用于处理酸性矿山排水的实验研究.《环境科学》.2012,第33卷(第4期),1272-1277. |
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| 铜陵相思谷尾矿用于处理酸性矿山排水的实验研究;张楠等;《环境科学》;20120430;第33卷(第4期);1272-1277 * |
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Inventor after: Chen Tianhu Inventor after: Wang Jin Inventor after: Jiang Xinyuan Inventor after: Yang Yan Inventor after: Li Ping Inventor after: Liu Haibo Inventor after: Xie Jingjing Inventor after: Xie Qiaoqin Inventor after: Chen Dong Inventor before: Chen Tianhu Inventor before: Wang Jin Inventor before: Yang Yan Inventor before: Li Ping Inventor before: Liu Haibo Inventor before: Xie Jingjing Inventor before: Xie Qiaoqin Inventor before: Chen Dong |
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Free format text: CORRECT: INVENTOR; FROM: CHEN TIANHU WANG JIN YANG YAN LI PING LIU HAIBO XIE JINGJING XIE QIAOQIN CHEN DONG TO: CHEN TIANHU WANG JIN JIANG XINYUAN YANG YAN LI PING LIU HAIBO XIE JINGJING XIE QIAOQIN CHEN DONG |