CN101403037A - Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content - Google Patents
Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content Download PDFInfo
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- CN101403037A CN101403037A CNA2008101073752A CN200810107375A CN101403037A CN 101403037 A CN101403037 A CN 101403037A CN A2008101073752 A CNA2008101073752 A CN A2008101073752A CN 200810107375 A CN200810107375 A CN 200810107375A CN 101403037 A CN101403037 A CN 101403037A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a dump leaching technique of ground organism of secondary copper sulphide ore with high content of arsenic. The technique comprises the following steps: the secondary copper sulphide ore with high content of arsenic is crushed to 10 to 30mm, and acid mine water of mineral-leaching microorganism with thiobacillus ferrooxidans and thiobacillus thiooxidans is used for leaching the secondary copper sulphide ore with high content of arsenic; while most of the arsenic in the ore is still in leaching residue and a small part of the arsenic is in the leachate, faffinated and electrodeposition liquid; but closed cycle in the production has no effect on the extraction and electrodeposition and standard cathode copper product, thus avoiding the hazard of the arsenic to the environment. The technique has short process, little investment, low cost and energy consumption, no pollution and high rate of recovery, can process the copper ore with high content of arsenic which can not be processed by the traditional smelting technique, and also can process the secondary copper sulphide ore with high content of arsenic and similar secondary copper sulphide ore with high content of arsenic so as to expand the utilization range of resources.
Description
Technical field
The present invention relates to a kind of earth's surface biological dump leaching process of secondary copper sulfide ore, especially a kind of raw ore contains the earth's surface biological extract technology of higher (0.035%) secondary copper sulfide ore of arsenic.
Background technology
Press the selecting and smelting technology condition, copper mine stone is marked three natural types with the ratio of cupric oxide and cupric sulfide.Be sulfide ore, contain cupric oxide less than 10%; Oxidized ore contains cupric oxide greater than 30%; Mixed ore contains cupric oxide 10%～30%.All kinds of ores generally are the top that oxidized ore is in the mineral deposit in the spatial distribution in mineral deposit order, and it is dripping and cause to be that sulphide ores is subjected to weathering for a long time, down is to mix the ore deposit, and sulphide ores is because of being in the bottom in mineral deposit away from the face of land.Copper oxide ore adopts conventional method for floating to be difficult to reclaim copper, generally adopts wet processing; Copper-sulphide ores can only adopt flotation process, although the research of the bacterium of existing copper-sulphide ores leaching does not in the world have breakthrough so far; Occurred first floating at present and afterwards soaked or soaked earlier the process integration that afterwards floats and mix the ore deposit.In addition on the mineral deposit distributes, secondary enrichment zone based on copper glance, alpha chalcocite usually appears between oxidized ore and the sulphide ores, be called secondary copper sulfide ore, the type ore all adopted traditional flotation process (comprise fragmentation, ore grinding, sort, dehydration procedure) production of copper concentrate in the past, must send smeltery's (comprising melting, blowing, refining, electrowinning process) to produce cathode copper at last.
Because arsenic is similar to the flotation nature of copper, enrichment in copper ore concentrates always.When higher time＞0.022% of arsenic content in the raw ore, the arsenic content in the copper ore concentrates is with＞0.5%.And arsenic is to enter flue gas in smelting, and produces arsenic trisulfide (orpiment) through dilution and sulfuration, must take the anti-acid system of antiseepage to stack specially.Processing to arsenic considers comprehensively that from the angle of investment, cost, treating processes and environmental protection the smeltery requires copper ore concentrates to contain arsenic must be less than 0.5%.The processing arsenic although the smeltery can adopt various measures, but still have a spot of arsenic to enter atmosphere with present state of the art, because of arsenic toxic action in animal body mainly is to combine with enzyme system in the cell, the biological action of many enzymes is suppressed loses activity, cause metabolic disturbance.Adopt traditional dressing and smelting process to handle and contain the higher copper mine stone of arsenic, must damage the high cost of environment, and higher to the grade requirement of milling ore, therefore, be necessary to seek a kind of novel process.
Heap leaching method is nearly decades of emerging in the world ore-dressing techniques, can be used to handle some mineral effectively at present.With regard to copper mine stone, domestic have some copper oxide ores to adopt this technology, and the present invention is successfully used to the secondary copper sulfide mineral explained hereafter for the first time, made demonstration for whole nation ore of the same type adopts face of land heap leaching method, can generally promote.
Summary of the invention
The object of the present invention is to provide a kind of earth's surface biological dump leaching process that contains the higher secondary copper sulfide ore of arsenic.Adopt this explained hereafter, the arsenic overwhelming majority is solid and stays in the leached mud; A spot of about 0.2g/L of arsenic that enters leach liquor and raffinate, electric effusion only has 0.005g/L, and closed cycle aborning, and extraction, electrodeposition are not all had influence, fully can the production standard cathode copper.
Technical scheme of the present invention is: a kind of earth's surface biological dump leaching process that contains the higher secondary copper sulfide ore of arsenic, this technology is with ore reduction to 10～30mm, build heap, the acidic mine water that the leaching microbacteria that contains thiobacillus ferrooxidant and thiobacillus thiooxidans is sprayed on the heap limit is built on the limit, catchments near the pit that contains it picks up from the higher secondary copper sulfide ore body of arsenic.Wait to build pile certain altitude after, on heap, continue the acidic mine water of spray impregnation ore deposit microorganism.Qualified leach liquor can obtain to meet the AMD5725 of London Metal Exchange standard cathode copper products again behind extraction, electrodeposition.
The invention has the advantages that: this technology (1) is strong to the adaptability of ore character and mine natural condition, can reduce the milling ore grade, enlarges utilization of resources degree; (2) just can gather near the immersion ore bacterium liquid convenient sources, ore body, and breeding is rapidly simple; (3) flow process is short, less investment; (4) saved the spent huge energy consumption of ore ore grinding, with the energy consumption of the required pyroreaction of pyrometallurgical smelting process, total cost of production reduces greatly; (5) reaction temperature and, environmental friendliness can realize CR production.Biological copper-extracting process utilizes biocatalysis, must high temperature and use the harsh chemical environment change of strong acid-base to react with mineral in the traditional technology as the gentleness under normal temperature and the lower concentration, be called as cleaning procedure.The pyrometallurgical smelting process is followed CO, CO
2, SO
2Discharging in obnoxious flavour and waste liquid, waste residue.Especially copper ore concentrates contains arsenic and exceeds standard, and the flue gas in the pyrometallurgical smelting must contain arsenic, if more thoroughly administer, difficulty is big, invest also greatly, than containing the copper ore concentrates that arsenic does not exceed standard, smelts to increase and invests approximately 8%, and cost also increases.Also will produce a large amount of mine tailings in the ore dressing process before the pyrometallurgical smelting, wherein contain a large amount of flotation reagents and contents of many kinds of heavy metal ion, and must build the mine tailing storehouse, both increase investment, increase the expense and the workload of the maintenance of mine tailing storehouse, control and environmental protection aspect again.And the leach liquor that biological copper-extracting process produces aborning, raffinate, poor electrolytic solution all constitute closed cycle, thereby non-wastewater discharge; Waste residue after the leaching is thicker because of granularity, also is easy to stable the stacking.
Description of drawings
Accompanying drawing contains earth's surface biological wet method smelting process (the containing biological dump leaching process) FB(flow block) of the higher secondary copper sulfide ore of arsenic for the present invention.
Embodiment
As shown in the figure, 1 for catchmenting near the pit that contains the higher secondary copper sulfide ore body of arsenic, gather the acidic mine water of the leaching microbacteria that mainly contains thiobacillus ferrooxidant and thiobacillus thiooxidans, 2 is to containing the higher secondary copper sulfide mineral ore of arsenic, through ore reduction 3, and granularity is controlled at 10～30mm, build heap 4 by the stockyard that it is good that dump truck or rubber conveyer are transported to regulation, build the acidic mine water of introducing a certain amount of impregnation ore deposit microorganism in the heap process, 5 for continuing the acidic mine water spray leaching process with impregnation ore deposit microorganism, defective leach liquor 6 returns the stockyard spray, and qualified leach liquor 7 obtains standard cathode copper products 8 through extraction electrodeposition.
The invention will be further described below in conjunction with embodiment.
Embodiment 1
This novel process first Application at home contains the higher secondary copper sulfide mineral of arsenic in Fujian, built up large-scale industrial production factory, goes into operation the end of the year 2005.Production practice show, this Technology advanced person, and cost is low, and economy, society and environmental benefit are remarkable.In the ore in the metalliferous mineral based on sulfide, metallic sulfide is except that pyrite, be mainly the sulfide of copper, found 16 kinds in the sulfide of copper, wherein alpha chalcocite, covellite, piece enargite, enargite account for more than 99.26%, secondly be copper glance, purple copper etc., other copper metallic sulfide amounts are few.
Non-metallic minerals is mainly quartz, and inferior is dickite, alunite, sericite, a small amount of barite, feldspar, white mica, zunyite etc.
Main harmful element is an arsenic in the ore.About 8 kinds of arsenide and arsenic-containing ores.Arsenic element is mainly composed and is stored in the enargite, and the part enargite is the fine particle inclusion in pyrite.
Copper in the ore leaches
With ore reduction to 10～30mm, automobile is joined dozer or adhesive tape and is joined stacker-reclaimer and build heap then, build and evenly introduce a certain amount of acidic mine water that contains the leaching microbacteria of thiobacillus ferrooxidant and thiobacillus thiooxidans in the heap process, adopt excavator to carry out the pine heap simultaneously, pile high 5～10 meters, after building heap and finishing, with spray pump again with the acidic mine water of impregnation ore deposit microorganism, raise to stockyard spray, impregnation ore deposit bacterial concentration 20～70 * 10 in this spray liquid
6Individual/Lm, leach liquor pH value 1.5～2.5, leach liquor current potential 350～600mv.Defective leach liquor (Cu
2+＜1.5g/L) directly entering middle pond, middle pond solution returns the stockyard spray; Qualified leach liquor (Cu
2+〉=1.5g/L) send the rich solution pond.Rich solution extracts with pumping, and raffinate also returns the stockyard circulated sprinkling by pump, and the arsenic overwhelming majority is then stayed in the leached mud with solid form.About 270 days of leaching cycle, copper leaching rate reaches 80%, percentage extraction 96%, electrodeposition rate 97.6%, comprehensive recovery about 75%.Spray can not unload heap after finishing, need not lay heelpiece, directly continues next round dump leaching operation on useless stockyard, so after the circulation for several times, when leaching velocity lowers, then lays heelpiece more again on useless stockyard, beginning new round dump leaching operation.
Claims (1)
1, a kind of earth's surface biological dump leaching process that contains the higher secondary copper sulfide ore of arsenic is characterized in that: this technology: will contain the higher secondary copper sulfide ore of arsenic through being crushed to 10～30mm, and be transported to the good stockyard of regulation by dump truck or rubber conveyer; Build in the heap process acidic mine water of evenly introducing the leaching microbacteria that contains thiobacillus ferrooxidant and thiobacillus thiooxidans, wait to build pile certain altitude after, on heap, continue the acidic mine water of spray impregnation ore deposit microorganism; To build heap high 5～10 meters at every turn, after building heap and finishing, the bacterium liquid of leaching microbacteria raised to stockyard spray Cu with spray pump
2+The defective leach liquor of＜1.5g/L returns the stockyard spray; Cu
2+The qualified leach liquor of 〉=1.5g/L can obtain the standard cathode copper products after sending extraction, electrodeposition; Raffinate also returns the stockyard circulated sprinkling by pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101073752A CN101403037A (en) | 2008-11-11 | 2008-11-11 | Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content |
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| CNA2008101073752A CN101403037A (en) | 2008-11-11 | 2008-11-11 | Earth's surface biological dump leaching process for secondary copper sulfide ore with higher arsenic content |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993835A (en) * | 2010-05-27 | 2011-03-30 | 威远川奇生工科技有限责任公司 | Arsenic-resistant bacteria and method for performing oxidation treatment on high-arsenic gold concentrate by using same |
| CN103014335A (en) * | 2013-01-10 | 2013-04-03 | 紫金矿业集团股份有限公司 | Process for comprehensively recovering gold and copper through combined biological dump leaching of refractory gold concentrate and copper melting slag |
| CN115849403A (en) * | 2022-12-12 | 2023-03-28 | 国投新疆罗布泊钾盐有限责任公司 | Method for resource recycling of potassium-containing tailings in salt lake stock |
-
2008
- 2008-11-11 CN CNA2008101073752A patent/CN101403037A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993835A (en) * | 2010-05-27 | 2011-03-30 | 威远川奇生工科技有限责任公司 | Arsenic-resistant bacteria and method for performing oxidation treatment on high-arsenic gold concentrate by using same |
| CN103014335A (en) * | 2013-01-10 | 2013-04-03 | 紫金矿业集团股份有限公司 | Process for comprehensively recovering gold and copper through combined biological dump leaching of refractory gold concentrate and copper melting slag |
| CN103014335B (en) * | 2013-01-10 | 2014-08-13 | 紫金矿业集团股份有限公司 | Process for comprehensively recovering gold and copper through combined biological dump leaching of refractory gold concentrate and copper melting slag |
| CN115849403A (en) * | 2022-12-12 | 2023-03-28 | 国投新疆罗布泊钾盐有限责任公司 | Method for resource recycling of potassium-containing tailings in salt lake stock |
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