CN103088222A - Process for treating refractory gold ores - Google Patents

Process for treating refractory gold ores Download PDF

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CN103088222A
CN103088222A CN2013100321544A CN201310032154A CN103088222A CN 103088222 A CN103088222 A CN 103088222A CN 2013100321544 A CN2013100321544 A CN 2013100321544A CN 201310032154 A CN201310032154 A CN 201310032154A CN 103088222 A CN103088222 A CN 103088222A
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slurries
gold
parts
ore
microbial inoculum
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CN103088222B (en
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李兆营
徐希强
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Haimen Chuanghao Industrial Design Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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

A kind of processing method of processing refractory gold ore
Technical field
The invention belongs to the 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, accounts for 2/3rds of the total gold ore resource in the world, accounts for more than 1/3rd in China, mainly is 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 the country rock boundary line, and gold mainly is, 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.To the ore of some kind, often adopt 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 that some mineral (being mainly sulfide mineral) and element are had, reduction, dissolving, absorption (absorption), moltenly from ore soak metal or reclaim valuable metal or remove the hydrometallurgy process of poisonous metal from water.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 with remarkable economy and environmental protection interests of extracting multiple useful metal 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; The microorganism compatibility is unreasonable, causes the leaching effect of gold relatively 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, and is mutually collaborative, can reach better desulfurization dearsenification decarburization effect, and the leaching yield of gold also improves greatly, and can recycle and reuse, and is 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 purpose breezes, wherein adds activator in ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that the mass ratio of 1: 1 mixes; Add water and be adjusted to the pulp slurry that breeze concentration is 30% (w/v), 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; The limit passes into air limit stirring, and stirring velocity is 200 rev/mins, and the intake of air per minute is 0.5m 3/ m 3Pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, 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 is completed, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; The 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 acidity and adjusts to 11, adds sodium cyanide after acidity is stable, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 rev/mins, 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 are had 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); At first be seeded on potato dextrose agar (PDA), 28-30 ℃, make primary inclined plane and cultivate, then fermentation culture viable count to the 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 at first on substratum, 28-30 ℃, make primary inclined plane and cultivate, then secondary seed is cultivated, mixing fermentation culture viable count to the 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 that in product, viable count 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), be the BAM substratum with the substratum of alicyclic acid genus bacillus, 30 ℃ are cultured to viable count and reach 1.0 * 10 8Individual/gram.
With 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, have between them and act synergistically preferably and have complementary advantages, and can effectively arsenic, the sulfur mineral of parcel gold can be decomposed, the 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, makes the carbon in mineral substance be destroyed, and suppresses to cover, and reduces carbon species to the constraint of gold element.
3. the better tolerance of the microbial inoculum of the present invention preparation to arsenic and sulphur, and can recycle and reuse, saved resource, avoided environmental pollution.
4. the present invention need not the 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 and contain 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 decrease of the impurity such as sulphur arsenic, cyanidation gold-extracted needed sodium cyanide is significantly reduced, and the consumption of sodium cyanide only is 1kg/t slag slurry.
Embodiment
Below will adopt specific embodiment that the present invention is further explained, but should not regard the restriction to initiative spirit of the present invention as.
Embodiment 1
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 purpose breezes, wherein adds activator in ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that the mass ratio of 1: 1 mixes; Add water and be adjusted to the pulp slurry that breeze concentration is 30% (w/v), 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; The limit passes into air limit stirring, and stirring velocity is 200 rev/mins, and the intake of air per minute is 0.5m 3/ m 3Pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, 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 is completed, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; The gained filter residue adds water, and to be deployed into mass volume ratio be 30% slag slurry, then with lime, slag starched acidity and adjust to 11, adds sodium cyanide after acidity is stable, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 rev/mins, 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 are had 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.The 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 sees 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 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 purpose breezes, wherein adds activator in ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that the mass ratio of 1: 1 mixes; Adding water is 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; The limit passes into air limit stirring, and stirring velocity is 200 rev/mins, and the intake of air per minute is 0.5m 3/ m 3Pulp slurry is carried out microorganism catalysis under the condition of 30 ℃, 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 is completed, filter and collect filtrate and filter residue, wherein gained filtrate is used for catalyzed reaction next time; The 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 acidity and adjust to 11, add sodium cyanide after acidity is stable, sodium cyanide consumption 1kg/ ton slag slurry, pass into air, cyanidation gold-extracted under the stirring velocity of 200 rev/mins, 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 are had 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; At first be seeded on potato dextrose agar (PDA), 28-30 ℃, make primary inclined plane and cultivate, then fermentation culture viable count to the product reaches 1.0 * 10 8Individual/gram.
The preferred Pseudomonas aeruginosa of described Pseudomonas aeruginosa, ATCC15442; Pseudomonas aeruginosa at first on substratum, 28-30 ℃, make primary inclined plane and cultivate, then secondary seed is cultivated, mixing fermentation culture viable count to the 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 that in product, viable count reaches 1.0 * 10 8Individual/gram.
The preferred alicyclic acid genus bacillus of described alicyclic acid genus bacillus Alicyclobacillus, CGMCC4500 is the BAM substratum with the substratum of alicyclic acid genus bacillus, 30 ℃ are cultured to viable count and reach 1.0 * 10 8Individual/gram.
With 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
The 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 the 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 the 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.Obtain the leaching yield of desulfurization degree, arsenic-removing rate, carbon-drop rate and gold by detection, see 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 prior art preparation commonly used greatly, and the leaching yield of gold improves greatly, has reduced simultaneously the consumption of sodium cyanide, has reduced cost; But also the interpolation decarburization effectively of discovery hydrogen peroxide can improve golden leaching yield.

Claims (3)

1. 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 purpose breezes, wherein adds activator in ball mill, addition is the thousandth of gold mine quality; Then adding water, to be adjusted to solid material concentration be 30% slurries; Described activator is by water glass: kerosene mixes according to the mass ratio of 1: 1;
2) oxidation and decarbonization: in step 1) add hydrogen peroxide in the slurries of preparation, 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; The limit passes into air limit stirring, and stirring velocity is 200 rev/mins, and the intake of air per minute is 0.5m 3/ m 3Slurries carry out microorganism catalysis under the condition of 30 ℃, the catalyzed reaction time is 5 days;
4) cyanidation gold-extracted: as after catalyzed reaction is completed, to filter and collect filter residue; The gained filter residue adds water, and to be deployed into solid material concentration be 30% slag slurry, then with lime, slag starched pH and adjust 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 rev/mins, 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 are had 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 2) in, catalyzed reaction was added ammonium phosphate in the time of the 3rd day in slurries, and wherein the mass ratio of ammonium phosphate and slurries is 1: 100.
3. method as described in claim 1-2, is characterized in that, the preferred bulkholderia cepasea CGMCC3223 of described bulkholderia cepasea; The preferred verdigris aeruginosa atcc 15442 of described Pseudomonas aeruginosa; Describedly have a liking for the ferrous thiobacillus of acid oxidase and preferably have a liking for the ferrous thiobacillus ATCC53993 of acid oxidase; The preferred sulfolobus solfataricus ATCC35092 of described sulfolobus solfataricus; The preferred alicyclic acid genus bacillus of described alicyclic acid genus bacillus CGMCC4500.
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CN103320610A (en) * 2013-07-03 2013-09-25 山东黄金矿业(沂南)有限公司 Sorting technique for valuable elements associated with gold
CN104831066A (en) * 2015-05-25 2015-08-12 北京矿冶研究总院 Method for treating primary gold ore
US11718892B2 (en) 2015-03-30 2023-08-08 CvPlus GmbH Biological ore processing for the isolation of heavy metals
WO2023205684A1 (en) * 2022-04-21 2023-10-26 Locus Solutions Ipco, Llc Materials and methods for increasing gold recovery from leachate solutions

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WO2023205684A1 (en) * 2022-04-21 2023-10-26 Locus Solutions Ipco, Llc Materials and methods for increasing gold recovery from leachate solutions

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Patentee before: Li Zhaoying

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140226