CN103074489A - Processing method of refractory gold ore - Google Patents

Processing method of refractory gold ore Download PDF

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CN103074489A
CN103074489A CN2013100411023A CN201310041102A CN103074489A CN 103074489 A CN103074489 A CN 103074489A CN 2013100411023 A CN2013100411023 A CN 2013100411023A CN 201310041102 A CN201310041102 A CN 201310041102A CN 103074489 A CN103074489 A CN 103074489A
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slurries
gold
parts
ore
microbial inoculum
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CN103074489B (en
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徐希强
李兆营
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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
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Abstract

The invention belongs to the field of gold ore resource dressing and particularly discloses a processing method of refractory gold ore. The method comprises the steps of smash homogenate, oxidation decarbonization, microorganism catalysis, cyanidation gold extraction and the like. The invention also discloses a microorganism microbial agent for processing refractory gold ore. When the method disclosed by the invention is utilized, sulfur, arsenic and carbon elements in the gold ore can be effectively removed, meanwhile, the leaching rate of gold elements is improved, and better application prospects are realized.

Description

A kind for the treatment of process of refractory gold ore
Technical field
The invention belongs to the gold ore resource ore dressing field, relate to a kind for the treatment of process of 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 the ore, and very difficult quilt exposes out, 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 (mainly being sulfide mineral) and element are had, 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 with remarkable economy and environmental protection interests of from low-grade, difficult ore, extracting multiple useful metal, 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 for the treatment of process of refractory gold ore.Each microorganism compatibility is reasonable in the method, 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 the ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that 1: 2 mass ratio 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 the pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; The limit passes into the air limit and stirs, 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 30 ℃ condition, 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 finished, filter and collect filtrate and filter residue, wherein gained filtrate is used for next time catalyzed reaction; 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 200 rev/mins stirring velocity, the cyaniding time is 24 hours; After testing, the leaching yield of gold reaches 98.26%.
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, 4 parts of sulfolobus solfataricus, 5 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 the 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 ATCC 15442 to 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) ATCC 35092 (referring to document Characterization of the thermophilic isoamylase 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 2HPO40.5g/L, Ca (NO 3) 20.01g/L, FeSO 47H 2O44.43g/L) 28-30 ℃ is cultured to that viable count reaches 1.0 * 10 in the product 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 4: 5.
The acquisition pattern of above-mentioned microbial inoculum only is optimal way, and the method for strain expanded culture neither be unique in the above-mentioned steps, 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 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, so that preferably symbiosis between the 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, so that the carbon in the mineral substance obtains destroying, suppresses to cover, and reduces carbon species to the constraint of gold element.
3. the microbial inoculum of the present invention preparation is to the better tolerance of arsenic and sulphur, and can recycle and reuse, and 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 because 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 to come the present invention is further explained, but should not regard the restriction to initiative spirit of the present invention as.
Embodiment 1
A kind for the treatment of process of 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 the ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that 1: 2 mass ratio 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 the pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; The limit passes into the air limit and stirs, 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 30 ℃ condition, 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 finished, filter and collect filtrate and filter residue, wherein gained filtrate is used for next time catalyzed reaction; 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 200 rev/mins stirring velocity, 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, 4 parts of sulfolobus solfataricus, 5 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 for the treatment of process of 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 the ball mill, addition is the thousandth of gold mine quality; Described activator is according to water glass: kerosene is that 1: 2 mass ratio 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 the pulp slurry, and wherein the mass ratio of microbial inoculum and pulp slurry is 1: 100; The limit passes into the air limit and stirs, 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 30 ℃ condition, 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 finished, filter and collect filtrate and filter residue, wherein gained filtrate is used for next time catalyzed reaction; 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 200 rev/mins stirring velocity, the cyaniding time is 24 hours; After testing, the leaching yield of gold reaches 98.26%.
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, 4 parts of sulfolobus solfataricus, 5 parts of alicyclic acid genus bacillus.
The preferred bulkholderia cepasea Burkholderia sp of described bulkholderia cepasea, CGMCC NO.3223; At first be seeded on the 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 ferrooxidans ATCC53993; 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 ((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 viable count reaches 1.0 * 10 in the product 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 4: 5.
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 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.By detecting the leaching yield that obtains desulfurization degree, arsenic-removing rate, carbon-drop rate and gold, 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 97.31 96.92 80.04 96.39
The present invention 98.81 99.27 89.15 98.26
By finding that relatively 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, reduced simultaneously the consumption of sodium cyanide, reduced cost; But also the effectively decarburization of interpolation of discovery hydrogen peroxide can improve golden leaching yield.

Claims (2)

1. the treatment process of a refractory gold ore, it comprises the steps:
1) 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 the 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 1: 2 mass ratio;
2) in step 1) preparation slurries in add hydrogen peroxide, stir; The volume ratio of wherein said hydrogen peroxide and described slurries is 1: 200;
3) microbial inoculum is put into step 2) slurries in, wherein the mass ratio of microbial inoculum and slurries is 1: 100; The limit passes into the air limit and stirs, 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 30 ℃ condition, the catalyzed reaction time is 5 days; Wherein, 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.
4) after catalyzed reaction is finished, 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 200 rev/mins stirring velocity, 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, 4 parts of sulfolobus solfataricus, 5 parts of alicyclic acid genus bacillus.
2. the method for claim 1 is characterized in that, the preferred bulkholderia cepasea CGMCC NO.3223 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 CGMCC.4500.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451122A (en) * 2015-01-01 2015-03-25 长春黄金研究院 Heating prepassivation extraction process

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US6096113A (en) * 1997-05-16 2000-08-01 Echo Bay Mines, Limited Integrated, closed tank biooxidation/heap bioleach/precious metal leach processes for treating refractory sulfide ores
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