CN103088222B - Process for treating refractory gold ores - Google Patents
Process for treating refractory gold ores Download PDFInfo
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- CN103088222B CN103088222B CN201310032154.4A CN201310032154A CN103088222B CN 103088222 B CN103088222 B CN 103088222B CN 201310032154 A CN201310032154 A CN 201310032154A CN 103088222 B CN103088222 B CN 103088222B
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- slurries
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- microbial inoculum
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000010931 gold Substances 0.000 title claims abstract description 37
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 19
- 244000005700 microbiome Species 0.000 claims abstract description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 22
- 239000002253 acid Substances 0.000 claims description 22
- 239000002068 microbial inoculum Substances 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 16
- 241000205091 Sulfolobus solfataricus Species 0.000 claims description 13
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 12
- 102000004316 Oxidoreductases Human genes 0.000 claims description 12
- 108090000854 Oxidoreductases Proteins 0.000 claims description 12
- 241000605118 Thiobacillus Species 0.000 claims description 12
- 241000589517 Pseudomonas aeruginosa Species 0.000 claims description 11
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 10
- 125000002723 alicyclic group Chemical group 0.000 claims description 10
- 239000012190 activator Substances 0.000 claims description 9
- 239000004254 Ammonium phosphate Substances 0.000 claims description 8
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims description 8
- 235000019289 ammonium phosphates Nutrition 0.000 claims description 8
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000003350 kerosene Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000005262 decarbonization Methods 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 238000002386 leaching Methods 0.000 abstract description 15
- 229910052785 arsenic Inorganic materials 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000005864 Sulphur Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000013055 pulp slurry Substances 0.000 description 24
- 239000000706 filtrate Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 239000001965 potato dextrose agar Substances 0.000 description 4
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 241000266272 Acidithiobacillus Species 0.000 description 2
- 241001147780 Alicyclobacillus Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 241001453380 Burkholderia Species 0.000 description 2
- 229940041514 candida albicans extract Drugs 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012533 medium component Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012138 yeast extract Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000775208 Leptospirillum ferriphilum Species 0.000 description 1
- LAISNASYKAIAIK-UHFFFAOYSA-N [S].[As] Chemical compound [S].[As] LAISNASYKAIAIK-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 241000617156 archaeon Species 0.000 description 1
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- UMGXUWVIJIQANV-UHFFFAOYSA-M didecyl(dimethyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC UMGXUWVIJIQANV-UHFFFAOYSA-M 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
Classifications
-
- 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 field of ore dressing of ore resources, and discloses a process for treating refractory gold ores. The method comprises the steps of: crushing and homogenizing, oxidizing and decarbonizing, carrying out microorganism catalysis and cyaniding and leaching gold. The invention also provides a microbial agent for treating the refractory gold ores. Sulphur, arsenic and carbon can be effectively removed by using the process disclosed by the invention, and the gold leaching rate is greatly increased; and the process is suitable for industrialized production.
Description
Technical field
The invention belongs to Mineral resources ore dressing field, relate to a kind of processing method of processing refractory gold ore.
Background technology
Refractory gold ore is generally high arsenic, high-sulfur, high-carbon type dip-dye Gold Ore, and the three/Er， China that accounts for the total gold ore resource in the world accounts for more than 1/3rd, is mainly distributed in the provinces and regions such as Shandong, Guizhou, Sichuan and Gansu.The type gold deposit has that grade is low, scale is large, ore body is not obvious with country rock boundary line, and gold is mainly, and micro--inferior micro-form is wrapped in ore, is difficult to by out exposed, and leaching yield is low, and comprehensive recovery is difficult.
The all kinds of Gold Ore are because of different in kind, and the beneficiation method of employing also has difference, but generally adopt gravity treatment, flotation, amalgamate, cyaniding and resin-in-pulp process of today, charcoal slurry absorption method, dump leaching method to put forward golden novel process.Ore to some kind, often adopts associating gold extraction technology flow process.Biohydrometallurgy also claims Microorganism Leaching, be the effects such as the oxidation that utilizes certain micro-organisms or its meta-bolites to have some mineral (being mainly sulfide mineral) and element, reduction, dissolving, absorption (absorption), moltenly from ore soak metal or from water, reclaim valuable metal or remove the hydrometallurgy process of poisonous metal.The history of the existing many decades of its development, because the favorable factors such as cost is low, pollution-free, simple to operate are subject to people's attention day by day, become the modern technique of extracting the remarkable economy of having of multiple useful metal and environmental protection interests from low-grade, difficult ore, worldwide obtained popularization, improve and improved.Prior art discloses multiple-microorganism and has leached metallurgical technology, but has more shortcoming, and for example desulfurization dearsenification decarburization three can not get both, and often only possesses one; Microorganism compatibility is unreasonable, causes golden leaching effect poor; Operating process is loaded down with trivial details, and energy consumption is higher, is unfavorable for suitability for industrialized production etc.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of processing method of processing refractory gold ore.In the method, each microorganism compatibility is reasonable, mutually collaborative, can reach preferably desulfurization dearsenification decarburization effect, and the leaching yield of gold also improves greatly, and can recycle and reuse, environment friendly and pollution-free.
The invention discloses a kind of processing method of processing refractory gold ore, it comprises the steps:
Refractory gold ore is broken through ore crusher, then deliver to ball mill, being milled to particle diameter is 200 object breezes, wherein in ball mill, adds activator, addition is the thousandth of gold mine quality; Described activator is according to water glass: the mass ratio that kerosene is 1: 1 mixes; Add water and be adjusted to the pulp slurry that breeze concentration is 30% (w/v), then in pulp slurry, again add hydrogen peroxide, stir, wherein the volume ratio of hydrogen peroxide and pulp slurry is 1: 200.
Microbial inoculum is put in pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; Limit passes into air limit and stirs, and stirring velocity is 200 revs/min, and the intake of air per minute is 0.5m
3/ m
3pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, and catalysis time is 5 days, wherein, in the time of the 3rd day, adds ammonium phosphate in pulp slurry, and wherein the mass ratio of ammonium phosphate and pulp slurry is 1: 100;
After catalyzed reaction completes, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; Gained filter residue adds water and is deployed into the slag slurry that solid material concentration is 30% (w/v), then with lime, slag is starched to acidity and adjusts to 11, after acidity is stable, adds sodium cyanide, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 revs/min, the cyaniding time is 24 hours; After testing, the leaching yield of gold reaches 98.32%.
The raw material by following weight part of above-mentioned microbial inoculum mixes:
10 parts of bulkholderia cepasea, 8 parts of Pseudomonas aeruginosas, have a liking for 6 parts of the ferrous thiobacilluss of acid oxidase, 5 parts of sulfolobus solfataricus, 3 parts of alicyclic acid genus bacillus.
The preferred bulkholderia cepasea Burkholderia sp of described bulkholderia cepasea, CGMCC NO.3223 (can referring to CN101671636A); First be seeded in potato dextrose agar (PDA) upper, 28-30 ℃, makes primary inclined plane and cultivates, and then fermentation culture to viable count in product reaches 1.0 * 10
8individual/gram.
The preferred Pseudomonas aeruginosa of described Pseudomonas aeruginosa, ATCC15442 is (for example, referring to document Adaptation of Pseudomonas aeruginosa ATCC15442to didecyldimethylammonium bromide induces changes in membrane fatty acid composition and in resistance of cells, Journal of Applied Microbiology, 2001); Pseudomonas aeruginosa is first on substratum, and 28-30 ℃, makes primary inclined plane and cultivate, and then secondary seed is cultivated, mixing fermentation culture to viable count in product reaches 1.0 * 10
8individual/gram, described medium component is: NH
4cl1.0g, CH
3cOONa3.5g, MgCl
20.1g, CaCl
20.1g, KH
2pO
40.6g, K
2hPO
40.4g, yeast extract paste 0.1g, water 1000mI, pH7.2.
Describedly have a liking for the ferrous thiobacillus of acid oxidase and preferably have a liking for the ferrous thiobacillus Acidithiobacillus of acid oxidase ferrooxidans ATCC53993 (can referring to document A genomic island provides Acidithiobacillus ferrooxidans ATCC53993additional copper resistance:a possible competitive advantage.Appl Microbiol Biotechnol.2011); The preferred sulfolobus solfataricus of described sulfolobus solfataricus (Sulfolobus solfataricus) ATCC35092 (referring to document Characterization of the thermophilic i soamylase from the thermophilic archaeon Sulfolobus solfataricus ATCC35092, Journal of Molecular Catalysis B:Enzymatic).Describedly have a liking for the ferrous thiobacillus of acid oxidase or sulfolobus solfataricus in 9K substratum ((NH
4) SO
43g/L, KCl0.1g/L, K
2hPO
40.5g/L, Ca (NO
3)
20.01g/L, FeSO
47H
2o44.43g/L) 28-30 ℃ is cultured to viable count in product and reaches 1.0 * 10
8individual/gram.
The preferred alicyclic acid genus bacillus of described alicyclic acid genus bacillus Alicyclobacillus, CGMCC4500 (openly using referring to CN2011100247602), by the substratum of alicyclic acid genus bacillus, be BAM substratum, 30 ℃ are cultured to viable count and reach 1.0 * 10
8individual/gram.
By the bacterium liquid of above-mentioned cultivation according to mass ratio 10: 8: 6: be mixed to get microbial inoculum at 5: 3.
The acquisition pattern of above-mentioned microbial inoculum is only optimal way, and in above-mentioned steps, the method for strain expanded culture neither be unique, and those skilled in the art can select suitable medium and enlarged culturing method according to general knowledge, make viable count reach 10
8individual/gram.
Bacterial classification of the present invention all can be from Chinese Typical Representative culture collection center, Chinese microorganism strain preservation management committee's common micro-organisms center (CGMCC) and US mode culture collection warehousing (ATCC) buy and obtain.
The beneficial effect that the present invention obtains is as follows:
1. the present invention selects suitable microbe species and proportioning, make symbiosis preferably between microorganism, between them, there is good synergy and mutual supplement with each other's advantages, and can effectively golden arsenic, the sulfur mineral of parcel can be decomposed, particulate gold is come out, be easy to cyaniding and extract, greatly improved golden leaching yield.
2. the present invention has added the hydrogen peroxide of appropriate amount, and the carbon in mineral substance is destroyed, and suppresses to cover, and reduces the constraint of carbon species to gold element.
3. the better tolerance of the microbial inoculum that prepared by the present invention to arsenic and sulphur, and can recycle and reuse, saved resource, avoided environmental pollution.
4. the present invention, without high-temperature calcination treatment step, greatly reduces industrial energy consumption, has reduced cost.
5. the present invention has added activator in mechanical milling process, has improved crush efficiency, has reduced golden rate of loss.
6. microbial inoculum of the present invention can be processed containing arsenic more than 12%, sulphur content is more than 15%, carbon containing more than 6% high-As and high-S high-carbon gold mine, and due to the significantly reduction of the impurity such as sulphur arsenic, cyanidation gold-extracted needed sodium cyanide is significantly reduced, and the consumption of sodium cyanide is only 1kg/t slag slurry.
Embodiment
Below employing specific embodiment is further explained the present invention, but should regard the restriction to initiative spirit of the present invention as.
Embodiment 1
A processing method of processing refractory gold ore, it comprises the steps:
Refractory gold ore is broken through ore crusher, then deliver to ball mill, being milled to particle diameter is 200 object breezes, wherein in ball mill, adds activator, addition is the thousandth of gold mine quality; Described activator is according to water glass: the mass ratio that kerosene is 1: 1 mixes; Add water and be adjusted to the pulp slurry that breeze concentration is 30% (w/v), then in pulp slurry, again add hydrogen peroxide, stir, wherein the volume ratio of hydrogen peroxide and pulp slurry is 1: 200.
Microbial inoculum is put in pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; Limit passes into air limit and stirs, and stirring velocity is 200 revs/min, and the intake of air per minute is 0.5m
3/ m
3pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, and catalysis time is 5 days, wherein, in the time of the 3rd day, adds ammonium phosphate in pulp slurry, and wherein the mass ratio of ammonium phosphate and pulp slurry is 1: 100;
After catalyzed reaction completes, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; Gained filter residue adds water, and to be deployed into mass volume ratio be 30% slag slurry, then with lime, slag starched to acidity and adjust to 11, after acidity is stable, adds sodium cyanide, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 revs/min, the cyaniding time is 24 hours; After testing, the leaching yield of gold reaches more than 98%.
The raw material by following weight part of above-mentioned microbial inoculum mixes:
10 parts of bulkholderia cepasea, 8 parts of Pseudomonas aeruginosas, have a liking for 6 parts of the ferrous thiobacilluss of acid oxidase, 5 parts of sulfolobus solfataricus, 3 parts of alicyclic acid genus bacillus.
Embodiment 2
The gold mine of material choosing is Shandong Province's high-sulfur high-arsenic high-carbon gold mine.Major metal mineral are mispickel and pyrite etc., and major nonmetallic minerals is quartz, graphite and carbonaceous.The principal element analytical results of sample ore is in Table 1.
Each elemental composition of table 1 is analyzed
| Element | As | Fe | Cu | S | C | Au | K |
| Content % | 12.6 | 21.3 | 0.04 | 16.1 | 6.9 | 0.0048 | 2.1 |
A processing method of processing refractory gold ore, it comprises the steps:
Refractory gold ore is broken through ore crusher, then deliver to ball mill, being milled to particle diameter is 200 object breezes, wherein in ball mill, adds activator, addition is the thousandth of gold mine quality; Described activator is according to water glass: the mass ratio that kerosene is 1: 1 mixes; Add water and be adjusted to the pulp slurry that breeze concentration is 30% (w/v) (that is: breeze: water=30kg: 100L), then again add hydrogen peroxide in pulp slurry, stir, wherein the volume ratio of hydrogen peroxide and pulp slurry is 1: 200.
Microbial inoculum is put in pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; Limit passes into air limit and stirs, and stirring velocity is 200 revs/min, and the intake of air per minute is 0.5m
3/ m
3pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, and catalysis time is 5 days, wherein, in the time of the 3rd day, adds ammonium phosphate in pulp slurry, and wherein the mass ratio of ammonium phosphate and pulp slurry is 1: 100;
After catalyzed reaction completes, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; Gained filter residue adds water and is deployed into the slag slurry that solid material concentration is 30% (w/v) (that is: filter residue: water=30kg: 100L), then with lime, slag is starched to acidity and adjust to 11, after acidity is stable, add sodium cyanide, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 revs/min, the cyaniding time is 24 hours; After testing, the leaching yield of gold reaches 98.32%.
The raw material by following weight part of above-mentioned microbial inoculum mixes:
10 parts of bulkholderia cepasea, 8 parts of Pseudomonas aeruginosas, have a liking for 6 parts of the ferrous thiobacilluss of acid oxidase, 5 parts of sulfolobus solfataricus, 3 parts of alicyclic acid genus bacillus.
The preferred bulkholderia cepasea Burkholderia sp of described bulkholderia cepasea, CGMCC NO.3223; First be seeded in potato dextrose agar (PDA) upper, 28-30 ℃, makes primary inclined plane and cultivates, and then fermentation culture to viable count in product reaches 1.0 * 10
8individual/gram.
The preferred Pseudomonas aeruginosa of described Pseudomonas aeruginosa, ATCC15442; Pseudomonas aeruginosa is first on substratum, and 28-30 ℃, makes primary inclined plane and cultivate, and then secondary seed is cultivated, mixing fermentation culture to viable count in product reaches 1.0 * 10
8individual/gram, described medium component is: NH
4cl1.0g, CH
3cOONa3.5g, MgCl
20.1g, CaCl
20.1g, KH
2pO
40.6g, K
2hPO
40.4g, yeast extract paste 0.1g, water 1000mI, pH7.2.
Describedly have a liking for the ferrous thiobacillus of acid oxidase and preferably have a liking for the ferrous thiobacillus Acidithiobacillus of acid oxidase ferrooxidansATCC53993; The preferred sulfolobus solfataricus of described sulfolobus solfataricus (Sulfolobus solfataricus) ATCC35092; Describedly have a liking for the ferrous thiobacillus of acid oxidase or sulfolobus solfataricus in 9K substratum ((NH4) SO
43g/L, KCl0.1g/L, K
2hPO
40.5g/L, Ca (NO
3)
20.01g/L, FeSO
47H
2o44.43g/L) 28-30 ℃ is cultured to viable count in product and reaches 1.0 * 10
8individual/gram.
The preferred alicyclic acid genus bacillus of described alicyclic acid genus bacillus Alicyclobacillus, CGMCC4500, is BAM substratum by the substratum of alicyclic acid genus bacillus, 30 ℃ are cultured to viable count and reach 1.0 * 10
8individual/gram.
By the bacterium liquid of above-mentioned cultivation according to mass ratio 10: 8: 6: be mixed to get microbial inoculum at 5: 3.
Embodiment 3
Microbial inoculum effect test:
Simultaneous test: be divided into three control groups, be specially contrast 1, contrast 2, contrast 3,2 groups of the embodiment of the present invention.
Control group 1: microbial inoculum makes according to 1: 1 proportioning for having a liking for the ferrous thiobacillus of acid oxidase and thiobacillus ferrooxidans, and sodium cyanide consumption is 5kg/t, and all the other are with embodiment 2; Control group 2: microbial inoculum makes according to 1: 1: 1 proportioning for having a liking for the ferrous thiobacillus of acid oxidase, thiobacillus ferrooxidans and leptospirillum ferriphilum, and sodium cyanide consumption is 2kg/t, and all the other are with embodiment 2; Contrast 3: do not add hydrogen peroxide, processing mode is led to embodiment 2.By detection, obtain the leaching yield of desulfurization degree, arsenic-removing rate, carbon-drop rate and gold, in Table 2.
Table 2
| Group | Desulfurization degree % | Arsenic-removing rate % | Carbon-drop rate % | The leaching yield % of gold |
| Control group 1 | 79.31 | 81.62 | 76.13 | 87.15 |
| Control group 2 | 83.46 | 90.43 | 79.94 | 92.31 |
| Contrast 3 | 97.24 | 96.81 | 80.17 | 96.54 |
| The present invention | 98.97 | 99.09 | 89.06 | 98.32 |
By relatively finding, the desulfurization dearsenification decarburization effect of microbial inoculum of the present invention is better than the conventional preparation of prior art greatly, and gold leaching yield greatly improve, reduced the consumption of sodium cyanide simultaneously, reduced cost; But also the interpolation decarburization effectively of discovery hydrogen peroxide can improve golden leaching yield.
Claims (2)
1. a processing method of processing refractory gold ore, it comprises the steps:
1) broken homogenate: refractory gold ore is broken through ore crusher, then deliver to ball mill, being milled to particle diameter is 200 object breezes, wherein in ball mill, adds activator, addition is the thousandth of gold mine quality; Then add water and be adjusted to the slurries that solid material concentration mass volume ratio is 30%; Described activator is by water glass: kerosene mixes according to the mass ratio of 1:1;
2) in the slurries of oxidation and decarbonization: in step 1) preparing, add hydrogen peroxide, stir; The volume ratio of wherein said hydrogen peroxide and described slurries is 1: 200;
3), in slurries microorganism catalysis: microbial inoculum is put into step 2), wherein the mass ratio of microbial inoculum and slurries is 1:100; Limit passes into air limit and stirs, and stirring velocity is 200 revs/min, and the intake of air per minute is 0.5m
3/ m
3slurries carry out microorganism catalysis under the condition of 30 ℃, and the catalyzed reaction time is 5 days;
4) cyanidation gold-extracted: after catalyzed reaction completes, to filter and collect filter residue; Gained filter residue adds water and is deployed into slag that solid material concentration mass volume ratio is 30% slurry, then with lime, slag is starched to pH and adjusts to 11, pH and add sodium cyanide after stable, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 revs/min, the cyaniding time is 24 hours;
Described microbial inoculum is mixed by the raw material of following weight part: 10 parts of bulkholderia cepasea, 8 parts of Pseudomonas aeruginosas, have a liking for 6 parts of the ferrous thiobacilluss of acid oxidase, 5 parts of sulfolobus solfataricus, 3 parts of alicyclic acid genus bacillus.
2. the method for claim 1, is characterized in that, described step 3) in, catalyzed reaction, in the time of the 3rd day, is added ammonium phosphate in slurries, and wherein the mass ratio of ammonium phosphate and slurries is 1:100.
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