CN1208480C - Method for extracting copper from mixed copper ores - Google Patents
Method for extracting copper from mixed copper ores Download PDFInfo
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- CN1208480C CN1208480C CNB021516014A CN02151601A CN1208480C CN 1208480 C CN1208480 C CN 1208480C CN B021516014 A CNB021516014 A CN B021516014A CN 02151601 A CN02151601 A CN 02151601A CN 1208480 C CN1208480 C CN 1208480C
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000010949 copper Substances 0.000 title claims abstract description 66
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000002386 leaching Methods 0.000 claims abstract description 69
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000005751 Copper oxide Substances 0.000 claims abstract description 35
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 35
- 241000894006 Bacteria Species 0.000 claims abstract description 34
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 9
- 239000012074 organic phase Substances 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract 3
- 239000007788 liquid Substances 0.000 claims description 57
- 238000000605 extraction Methods 0.000 claims description 56
- 229960004643 cupric oxide Drugs 0.000 claims description 41
- 239000000284 extract Substances 0.000 claims description 35
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 claims description 30
- 238000013019 agitation Methods 0.000 claims description 21
- 238000004070 electrodeposition Methods 0.000 claims description 17
- 239000010802 sludge Substances 0.000 claims description 17
- 238000012216 screening Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 241000589516 Pseudomonas Species 0.000 claims description 2
- 241000605118 Thiobacillus Species 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 26
- 238000005516 engineering process Methods 0.000 abstract description 15
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 4
- 239000003546 flue gas Substances 0.000 abstract description 4
- 238000003801 milling Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 27
- 238000003723 Smelting Methods 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000006062 fragmentation reaction Methods 0.000 description 7
- 229910052569 sulfide mineral Inorganic materials 0.000 description 7
- 238000013467 fragmentation Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 5
- 230000001580 bacterial effect Effects 0.000 description 4
- 229910001779 copper mineral Inorganic materials 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 102100023321 Ceruloplasmin Human genes 0.000 description 1
- 108010075016 Ceruloplasmin Proteins 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000010065 bacterial adhesion Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
Classifications
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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 present invention relates to a method for extracting copper from a mixed type copper deposit, which is characterized in that copper sulfide ore and copper oxide ore are used as raw materials, and are respectively crushed into qualified broken ore; the qualified ore of the copper sulfide is directly heaped and leached by bacteria; firstly, the qualified ore of the copper oxide is washed and screened, and then, ore slurry and ore sand are respectively stirred, heaped and leached; leach liquor is extracted, part of extracted residual liquor is returned to be heaped and leached by the bacteria to replenish acid balance, and the other part of the extracted residual liquor is conveyed to be stirred, heaped and leached to be used as whole leaching reagents; subsequently, a conventional stripping process and a conventional electrodepositing process are orderly carried out for a load organic phase which is extracted, and then, cathode copper with high purity can be obtained. The whole wet method combination technology of the present invention has no need of ore milling classification, a baking process and flue gas are used for preparing acid, the granularity of tail ore and tail residues is thick, and the tail ore and the tail residues are easy to heap and store. The leaching rate of the copper sulfide ore reaches 80%, and the leaching rate of the copper oxide ore reaches 93%. The present invention has the advantages of high recovery rate, low cost, less investment, no pollution, etc., and can bring novel development for metallurgical industry of a region having the mixed type copper ore resource.
Description
(1) technical field
The present invention relates to from copper mine, extract in the field of metallurgy method of copper, particularly a kind of method of from low-grade mixed type copper mine, extracting copper.
(2) background technology
Up to the present, the method of extracting copper from the mixed type copper mine of Containing Sulfur copper mineral and copper oxide mineral has only two classes: a class is a pyrometallurgical smelting, promptly respectively copper-sulphide ores is adopted conventional floatation process, obtain copper ore concentrates, and adopt sulfide flotation method or segregation process to obtain copper ore concentrates to copper oxide ore, then adopt pyrometallurgical smelting and refining to obtain electrolytic copper to copper ore concentrates again.Adopt these class methods to handle the mixed type copper mine, there is complex process, invests flue gas serious environment pollution big, that traffic capacity is also big, cost is high, roasting relieving haperacidity produces, the cupric oxide extraction yield is low, problems such as the difficult sale of the sulfuric acid of attached product are difficult to be applied, especially in the side area of Infrastructure difference, these class methods more are difficult to be applied.Another kind of is pyrogenic process, wet method combined smelting, be about to copper-sulphide ores through grind grading, flotation, copper ore concentrates obtains copper and by-product sulfuric acid through pyrometallurgical smelting and refining, sulfuric acid is used to leach copper oxide ore again, or after the copper ore concentrates roasting relieving haperacidity, copper oxide ore after calcining and the fragmentation leaches with sulfuric acid after ore grinding, classification again, leach liquor adopts extraction-electrodeposition process to extract copper, also there are problems such as investment is big, cost is high, seriously polluted in the type method, especially set up pyrometallurgical smelting factory or roasting factory in the highlands, also need solve anoxic, problem such as high and cold.Therefore, poor in Infrastructure, do not possess the side area of building pyrometallurgical smelting factory, the copper resource of this kind mixed type copper deposit is difficult to obtain development and use always, can not be converted into economic advantages to the resources advantage of locality.With regard to China, the side area of these Infrastructure differences, this kind mixed type copper ore resource is extremely abundant, therefore, explores economical rationality, and environmentally friendly, the simple effective method that is applicable to such resources development and utilization is a problem that receives much concern.
The bacterium leaching-out technique of copper-sulphide ores is a kind of biological metallurgy technology that grows up the nearly more than ten years, and this technology adopts specific easy cultured microorganism that copper sulfide mineral is carried out oxidation dissolution and extracts metallic copper.The U.S. at first successfully realized the bacterial leaching copper industrialization at Kenny Ke Te (Ken necct) copper mine in 1958, and obtained first patent on the biological metallurgy history, and after this, through years of researches and practice, people grasp the technology of microbial leaching substantially.This technology utilizes interior distinctive ferroxidase of the active cells of bacterium and sulphur oxydase to come the ferrous iron in the oxidation catalysis ore to become ferric iron on the one hand, ferric iron is a strong oxidizer, the many copper sulfide minerals of oxidable dissolving, bacterial adhesion is on mineral surface on the other hand, the erosion damage mineral lattice, make mineral oxidation and dissolving, thereby comprehensively cause oxidized copper sulfate and the sulfuric acid of being dissolved as of copper sulfide mineral.
Copper oxide mineral is divided into the free oxidation copper mineral and in conjunction with copper oxide mineral, the copper oxide mineral in the mixed type copper deposit mainly is the free oxidation copper mineral, and the free oxidation copper mineral can both be leached by dilute sulphuric acid.
Adopting the copper in the extraction-electrodeposition process technology extraction sulfuric acid medium, is the extracting method that generally adopts in the world at present.
(3) summary of the invention
The objective of the invention is the deficiency that exists in the present technology method in order to overcome, replace pyrogenic process, wet method combined smelting process with simple complete wet smelting process, the combination smelting process that promptly adopts bacteria heap leaching and sulfuric acid to leach, realize low the input, low-cost, contamination-freely from the low mixed type copper deposit of copper content, effectively extract the high purity cathode copper.
The objective of the invention is to be achieved through the following technical solutions:
At first the copper-sulphide ores exploited out and copper oxide ore are broken into granularity respectively and are+1 to-30mm qualified muck; Secondly, the qualified muck of cupric sulfide is directly used bacteria heap leaching, and the qualified muck of cupric oxide is washed screening earlier, respectively sludge is carried out agitation leach with soaking ore deposit reagent again, ore in sand form is carried out dump leaching; Once more, all leach liquors are extracted, make the surplus liquid one tunnel of extraction return bacteria heap leaching and regulate the supplemental acid balance, the agitation leach of sludge and the dump leaching of ore in sand form are transported to as whole ore deposit reagent that soaks in another road; At last,, the load organic phases after the extraction is carried out back extraction, electrodeposition successively, can obtain cathode copper with conventional technology.
Invest big because the present invention has abandoned high grinding grading technique and the copper-sulphide ores of mixed type copper mine smelting cost, with serious pollution roasting relieving haperacidity dry method smelting technology, utilize the bacteria heap leaching technology dexterously and extracted surplus liquid recycle, mine tailing, the tailings coarse size is easily stored up, do not produce the flue gas flue dust, the comprehensive cost that extracts copper can reduce 1/3, the scale production investment reduces nearly 3/4, the copper-sulphide ores leaching yield reaches 80%, copper oxide ore reaches 93%, easily with high-level efficiency, low-cost, the few input, contamination-freely obtained the high purity cathode copper, brought new development to having the geographic metallurgical industry of this mixed type copper ore resource.
(4) description of drawings
The concrete grammar of invention is provided by the following drawings and explanation thereof.
Fig. 1 is the known main technique schema that extracts copper from the mixed type copper mine.
Fig. 2 is a kind of method process flow sheet that extracts copper from the mixed type copper mine that proposes according to the present invention.
As follows below in conjunction with description of drawings:
As can be seen from Fig. 1, the already known processes flow process mainly is, copper-sulphide ores 1 → fragmentation 2 → grind grading 3 → flotation 4 → dehydration 5 → roasting 6 makes calcining 9 and with the by-product sulfuric acid 10 of flue gas acid preparing 8; Copper oxide ore 18 → fragmentation 17 → grind grading 16 → agitation leach 15 → extraction 14 → back extraction 13 → electrodeposition 12 → major product cathode copper 11; If will be with its simple combination, then grind grading 16 flow processs that are delivered to after copper oxide ore 18 fragmentations 17 with the calcining 9 of pyrometallurgy after roasting 6 are cast out, relieving haperacidity 8 byproduct sulfuric acid 10 are opened a way go to utilize, after this carry out remaining technical process to obtaining major product cathode copper 11 to agitation leach 15 flow processs of copper oxide ore 18.
Technical process of the present invention shown in Figure 2 mainly is copper-sulphide ores 1 → fragmentation 2 → bacteria heap leaching 4 → extraction 7; Copper oxide ore 22 → fragmentation 21 → washing screening 19 goes out sludge 17 and ore in sand form 18 → difference agitation leach 15 and dump leaching 16 → extraction 7; Surplus liquid 6 parts of extraction that bacteria heap leaching 4 → extraction 7 produces are returned bacteria heap leaching 4, another part is transported to the agitation leach 15 of sludge 17 and the dump leaching 16 of ore in sand form 18, whole leach liquors 5 are entered remaining hydrometallurgy old process extraction 7, back extraction 9, electrodeposition 11, to obtaining cathode copper 12.
The detailed technical process of the present invention is, qualified muck 3 after copper-sulphide ores 1 fragmentation 2 of exploiting out is directly used bacteria heap leaching 4, leach liquor 5 is through extracting 7, load organic phases 8 is through back extraction 9, liquid 10 obtains cathode copper 12 through electrodeposition 11 after the back extraction, wherein the electrodeposition lean solution 13 that produces of electrodeposition is returned the regeneration organic phase 14 that back extraction 9, back extraction 9 go out and is returned extraction 7, and the bacteria heap leaching 4 that surplus liquid 6 parts of extraction that extraction 7 produces are returned the qualified muck 3 of cupric sulfide replenishes the balance of keeping acid.The qualified muck of exploiting out 20 in copper oxide ore 22 broken 21 backs is washed screening 19 earlier, again with sludge 17 agitation leachs 15, ore in sand form 18 dump leaching 16, the required ore deposit reagent that soaks is supplied with by another part of the surplus liquid 6 of extraction, and leach liquor 5 extracts 7 equally, back extraction 9, electrodeposition 11 be to obtaining cathode copper 12.
(5) embodiment
The copper-sulphide ores 1 that to exploit out from the mixed type copper deposit and copper oxide ore 22 are broken respectively 2,21, the granularity of its qualified muck 3,20 with+1 to-30mm is good, granularity is excessive, extraction time is long, and the ore liberation degree is little, undersized, soak ore deposit reagent or bacterium skewness, poor permeability.The qualified muck 3 of cupric sulfide is directly used bacteria heap leaching 4, preferred thiobacillus ferrooxidant of bacterium and Pseudomonas thereof.The surplus liquid 6 of extraction after leach liquor 5 extractions 7 all returns; a part is returned and is used clear water before the bacteria heap leaching 4 to be adjusted to the processing condition pH value be 2 o'clock row sprays again; help bacterium natural propagation, leaching and environment protection; extraction time was good with 200 to 300 days; guarantee sufficient extraction time and avoided polymictic leaching; secondary copper mine extraction time can be short slightly, and primary copper mine extraction time can be long slightly.Copper oxide ore 22 is crushed to-during 20mm, usually argillization is more serious, should wash screening 19, the another part that extracts surplus liquid 6 open a way sludge 17 agitation leachs 15 and ore in sand form 18 dump leaching 16 to cupric oxide 22 qualified mucks 20 washing screenings 19 are as whole ore deposit reagent that soak.The surplus liquid 6 of sludge 17 usefulness after dehydration extraction is sized mixing, and pulp density is 20～40% to be advisable, and normal temperature is strengthened agitation leach 15 down, and extraction time is 2 to 4 hours.Ore in sand form 18 is built heap, piles high 5 to 8m and is advisable, with surplus liquid 6 sprays of extraction, cloth liquid intensity 10～20L/m
2H, extraction time are 90 to 120 days.All leach liquor 5 is through the extraction 7 of routine, the back extraction 9 of load organic phases 8, the electrodeposition 11 of liquid 10 after the back extraction, can obtain the high purity cathode copper, this process is removed electrodeposition lean solution 13 and is returned back extraction 9, and the regeneration organic phase 14 of back extraction 9 is returned outside the extraction 8, and the recycle that extracts surplus liquid 6 seems even more important.
The processing condition of method of the present invention are done the explanation in a step with following indefiniteness embodiment; to help to understand the present invention and advantage thereof; and not as the qualification to protection domain of the present invention; the described per-cent of embodiment all is weight percents; described post height all is that post soaks the post height in the test, and heap is high to be determined according to the post height of test again.
Embodiment 1
The copper sulfide mineral of used leaching is formed (%): Cu0.66, Fe3.88, S3.83, and copper oxide mineral is formed (%): Cu9.29, Fe17.68, S0.85.
Copper-sulphide ores is proposed the copper operation: ore reduction is adopted bacteria heap leaching---extraction-electrodeposition process to-20mm, tests after 250 days copper, iron leaching yield and to extract the sulfuric acid result who generates in the surplus liquid as follows:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 250 days | 52.14 | 13.37 | 11.49 | 1.00 | 4.90 |
At this moment, extract surplus liquid PH and be starkly lower than the required spray liquid pH value 2 of bacterium extract technology, therefore extract a surplus liquid part and add about clear water adjustment PH to 2.0 every day, replenish the sulphide ores bacteria heap leaching.
Copper oxide ore ore in sand form dump leaching condition is: ore in sand form granularity-20mm ore deposit is measured 52 kilograms, and post is high 0.8 meter, leaches 100 days, adopts the surplus liquid of extraction to leach cloth liquid intensity 15L/m
2H, it is as follows to leach the result:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 100 days | 60.45 | 21.75 | 9.91 | 1.09 | 3.98 |
Cupric oxide sludge agitation leach condition is: ore grain size-1mm, get sample ore 500 gram, and normal temperature is strengthened agitation leach down, with extracting the leaching of sizing mixing of surplus liquid, pulp density 25%, extraction time 3 hours, copper leaching rate 89%.
Embodiment 2
The copper sulfide mineral of used leaching is formed (%): Cu0.51, Fe3.59, S3.43, and copper oxide mineral is formed (%): Cu6.06, Fe15.60, S20.00.
Copper-sulphide ores is proposed the copper operation: ore reduction is adopted bacteria heap leaching-extraction-electrodeposition process to-30mm, tests after 200 days copper, iron leaching yield and to extract the sulfuric acid result who generates in the surplus liquid as follows:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 200 days | 73.0 | 17.18 | 14.63 | 1.10 | 3.89 |
At this moment, extract surplus liquid PH and be starkly lower than the required spray liquid pH value 2 of bacterium extract technology, influence bacterial activity, therefore extract a surplus liquid part and add about clear water adjustment PH to 2.0 every day, replenish the sulphide ores bacteria heap leaching.
Copper oxide ore ore in sand form dump leaching condition is: ore in sand form granularity+1mm is to-20mm, 52 kilograms of ore deposit amounts, and post is high 0.8 meter, leaches 95 days, adopts the surplus liquid leaching of extraction, cloth liquid intensity 18L/m
2H, it is as follows to leach the result:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 95 days | 86.35 | 25.68 | 12.30 | 1.2 | 3.09 |
Cupric oxide sludge agitation leach condition is: sludge granularity-1mm, get sample ore 500 gram, and normal temperature is strengthened agitation leach down, and with extracting the leaching of sizing mixing of surplus liquid, pulp density 30% leached 2 hours, copper leaching rate 86%.
Embodiment 3
The copper sulfide mineral of used leaching is formed (%) Cu0.71, Fe4.04, S3.93, and copper oxide mineral is formed (%) Cu7.47, Fe18.12, S0.28.
Copper-sulphide ores is proposed the copper operation: ore reduction is adopted bacteria heap leaching---extraction-electrodeposition process to-30mm, tests after 250 days copper, iron leaching yield and extract the sulfuric acid result who generates in the surplus liquid as follows:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 250 days | 76.92 | 18.35 | 17.31 | 1.05 | 4.37 |
At this moment, extract surplus liquid PH and be starkly lower than the required spray liquid pH value 2 of bacterium extract technology, influence bacterial activity, therefore extract a surplus liquid part and add about clear water adjustment PH to 2.0 every day, use as the agent of sulphide ores ore deposit.
Copper oxide ore ore in sand form dump leaching condition is: ore in sand form granularity+1mm is to-20mm, 52 kilograms of ore deposit amounts, and post is high 0.8 meter, leaches 105 days, adopts the surplus liquid leaching of extraction, cloth liquid intensity 18L/m
2H, it is as follows to leach the result:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 105 days | 88.74 | 28.02 | 13.08 | 1.16 | 3.39 |
The copper oxide ore dust condition of soaking is: sludge granularity-1mm, get sample ore 500 gram, and normal temperature is strengthened agitation leach down, and with extracting the leaching of sizing mixing of surplus liquid, pulp density 40% leached 3 hours, copper leaching rate 91.45%.
Embodiment 4
The copper sulfide mineral of used leaching is formed (%) Cu0.62, Fe4.01, S3.88, and copper oxide mineral is formed (%): Cu13.73, Fe4.00, S0.40.
Copper-sulphide ores is proposed the copper operation: ore reduction is adopted bacteria heap leaching---extraction-electrodeposition process to-30mm, tests after 300 days copper, iron leaching yield and extract the sulfuric acid result who generates in the surplus liquid as follows:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 300 days | 80.70 | 20.77 | 19.00 | 1.04 | 4.47 |
At this moment, extract surplus liquid PH and be starkly lower than the required spray liquid pH value 2 of bacterium extract technology, influence bacterial activity, therefore extract a surplus liquid part and add about clear water adjustment PH to 2.0 every day, soak the ore deposit agent as sulphide ores and use.
Copper oxide ore ore in sand form dump leaching condition is: ore in sand form granularity+1mm is to-20mm, 52 kilograms of ore deposit amounts, and post is high 0.8 meter, leaches 115 days, adopts the surplus liquid leaching of extraction, cloth liquid intensity 18L/m
2H, it is as follows to leach the result:
| Time | Leaching yield | Extract surplus liquid | |||
| Cu | Fe | S | PH | H 2SO 4Concentration (g/l) | |
| 115 days | 91.76 | 21.44 | 17.69 | 1.05 | 4.37 |
Cupric oxide sludge agitation leach condition is: sludge granularity-1mm, get sample ore 500 gram, and normal temperature is strengthened agitation leach down, and with extracting the leaching of sizing mixing of surplus liquid, pulp density 30% leached 4 hours, copper leaching rate 98.21%.
Claims (5)
1. a method of extracting copper from the mixed type copper mine is a raw material with copper-sulphide ores (1) and copper oxide ore (22), it is characterized in that the method for this extraction copper is made up of following four steps:
The first step: it is+1 to-30mm qualified muck (3) (20) that respectively broken (2) (21) of copper-sulphide ores (1) and copper oxide ore (22) are become granularity;
Second step: the qualified muck of cupric sulfide (3) is directly used bacteria heap leaching (4), and the qualified muck of cupric oxide (20) is washed screening (19) earlier, respectively sludge (17) is carried out agitation leach (15) with soaking ore deposit reagent again, ore in sand form (18) is carried out dump leaching (16);
The 3rd step: leach liquor (5) is extracted (7), extract surplus liquid (6) one tunnel and return bacteria heap leaching (4), the supplemental acid balance, the agitation leach (15) and the dump leaching (16) of copper oxide ore transported on another road, as whole ore deposit reagent that soak;
The 4th step: the load organic phases (8) after the extraction (7) is carried out back extraction (9), electrodeposition (11) successively, can obtain cathode copper (12).
2. according to the described a kind of method of from the mixed type copper mine, extracting copper of claim 1, be raw material, it is characterized in that the method concrete steps of this extraction copper are with copper-sulphide ores (1) and copper oxide ore (22):
The first step: it is-1 to-20mm qualified muck (3) (20) that respectively broken (2) (21) of cupric sulfide (1) and copper oxide ore (22) are become granularity;
Second step: the qualified muck of cupric sulfide (3) is directly carried out bacteria heap leaching (4) with thiobacillus ferrooxidant and Pseudomonas thereof, and the qualified muck of cupric oxide (20) is washed screening (19) earlier, utilize bacteria heap leaching (4), the extraction surplus liquid (8) of extraction after (7) respectively the sludge (17) after the dehydration to be strengthened agitation leach (15) again, ore in sand form (18) is carried out dump leaching (16);
The 3rd step: all leach liquors (5) are extracted (7), a part that extracts surplus liquid (6) is regulated the bacteria heap leaching (4) that pH value to 2 returns the qualified muck of cupric sulfide (3) with clear water, with the supplemental acid balance, another part is opened a way to sludge (17) agitation leach (15) of the qualified muck of cupric oxide (20) and dump leaching (16), as its whole ore deposit reagent that soak, extract surplus liquid (6) recycle;
The 4th goes on foot: liquid (10) carried out electrodeposition (11) after the load organic phases (8) after the extraction (7) was carried out back extraction (9), back extraction successively, can obtain cathode copper (12).
3. a kind of method of extracting copper from the mixed type copper mine according to claim 1 and 2 is characterized in that ore in sand form (18) dump leaching (16) of copper oxide ore (22), and the heap height is 5 to 8m, and the cloth liquid intensity that extracts surplus liquid is 10 to 20L/m
2H, extraction time are 90～120 days.
4. a kind of method of from the mixed type copper mine, extracting copper according to claim 1 and 2, the sludge (17) that it is characterized in that copper oxide ore (22) is sized mixing with the surplus liquid of extraction (6), pulp density is 20～40%, and normal temperature is strengthened agitation leach (15) down, and extraction time is 2～4 hours.
5. a kind of method of extracting copper from the mixed type copper mine according to claim 1 and 2 is characterized in that qualified muck (3) bacteria heap leaching (4) time of copper-sulphide ores (1) is 200～300 days.
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2727557A1 (en) * | 2008-06-13 | 2009-12-17 | Poseidon Nickel Ltd | Rheological method for the hydrometallurgical recovery of base metals from ores |
| CN101736152B (en) * | 2008-11-24 | 2011-08-17 | 北京有色金属研究总院 | Acid washed ore leaching process for low-grade copper oxide ores with high mud content |
| CN101857917B (en) * | 2010-05-24 | 2012-05-09 | 云南铜业(集团)有限公司 | Method of classified leaching of oxidized ore with abundant mud |
| CN102358916A (en) * | 2011-10-13 | 2012-02-22 | 中铁资源集团有限公司 | Hydrometallurgical extraction method for recycling copper and cobalt from cobalt copper oxide ores |
| CN102643983B (en) * | 2012-05-23 | 2013-07-10 | 中国瑞林工程技术有限公司 | Stage-by-stage dump leaching technology for low-grade mixed copper ore |
| CN102719669B (en) * | 2012-07-06 | 2016-12-21 | 中国矿业大学(北京) | The technique of biological vulcanizing agent sulfide modifier low grade copper oxide ore |
| KR102198415B1 (en) * | 2013-10-23 | 2021-01-06 | 비에이치피 칠레 인크 | Heap leaching of copper |
| CN103555938B (en) * | 2013-10-29 | 2016-04-20 | 昆明理工大学 | A kind of high flotation and metallurgy method containing mud copper oxide ore |
| CN103611624B (en) * | 2013-11-27 | 2015-11-25 | 中南大学 | A kind of flotation-acidleach process integration processing low-grade mixed copper ore |
| CN104017990B (en) * | 2014-06-24 | 2016-08-17 | 罗光臣 | Ore hydrometallurgy leaching method |
| CN104674002B (en) * | 2014-12-12 | 2016-09-21 | 厦门紫金矿冶技术有限公司 | A kind of Low Grade Copper Ore bioleaching process |
| CN105112655B (en) * | 2015-08-31 | 2017-12-19 | 江西省科学院生物资源研究所 | A kind of method of classified leaching of earthy high-bonding-ratio cupric oxide ore |
| CN107805726A (en) * | 2016-09-08 | 2018-03-16 | 核工业北京化工冶金研究院 | Hydrometallurgy method is combined in a kind of Heap Leaching of Uranium Ore leaching |
| CN107779596B (en) * | 2017-11-08 | 2019-04-23 | 紫金矿业集团股份有限公司 | A kind of process integration handling copper-sulphide ores |
| CN110216018A (en) * | 2019-05-28 | 2019-09-10 | 西北矿冶研究院 | Beneficiation method for high-mud fine-grain copper oxide ore |
| CN113025815B (en) * | 2021-03-04 | 2022-05-17 | 万宝矿产有限公司 | Combined extraction method of complex copper-cobalt raw material |
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