CN113122714A - Biological heap leaching gold extraction method for low-grade gold ore - Google Patents
Biological heap leaching gold extraction method for low-grade gold ore Download PDFInfo
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- CN113122714A CN113122714A CN201911418938.4A CN201911418938A CN113122714A CN 113122714 A CN113122714 A CN 113122714A CN 201911418938 A CN201911418938 A CN 201911418938A CN 113122714 A CN113122714 A CN 113122714A
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000010931 gold Substances 0.000 title claims abstract description 45
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 45
- 238000000605 extraction Methods 0.000 title claims abstract description 18
- 238000002386 leaching Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 241000254137 Cicadidae Species 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 241000931705 Cicada Species 0.000 claims abstract description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 5
- 239000004571 lime Substances 0.000 claims abstract description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 5
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 239000004746 geotextile Substances 0.000 claims abstract description 4
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000011065 in-situ storage Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical group N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a biological heap leaching gold extraction method for low-grade gold ores, which comprises the following steps: forming a building ore pile by using raw ore or low-grade ore, and placing two layers of geotextile and one layer of plastic cloth at the bottom of the pile-sprinkling initial stage; adjusting alkalinity of ore pile or ore pulp by lime or caustic soda; thirdly, spraying the golden cicadas on the building ore heap by using a spraying pipe, wherein 400 g-2000 g of the golden cicadas are added into each ton of the ore heap, and the mass concentration of the golden cicadas is 0.3-1.5 per thousand; fourthly, the obtained solution flows into a precious liquid pool, the solution in the precious liquid pool is filled into a carbon tank, carbon adsorption is carried out to obtain gold mud, and finally gold is obtained through extraction; fifthly, the solution enters a carbon tank from the pregnant solution pool for carbon adsorption, the produced solution without gold flows into the barren solution pool, a cicada is added into the backwater, the pH value is regulated again to be 11-12, then the solution is directly pumped into the ore heap by a pump for recycling, and the leached tailings are directly dumped in situ in a tailing pond for stockpiling. The invention has no pollution and no emission.
Description
Technical Field
The invention relates to a gold extraction method, in particular to a biological heap leaching gold extraction method for low-grade gold ores.
Background
With the large amount of mining that is easy to mine, the development and utilization of low-grade ores and refractory gold ore resources have become an important task for gold mining. At present, the heap leaching gold extraction technology is low in cost and good in benefit, so that the technology is rapidly popularized and applied in many countries. However, most of dripping liquid used in the heap leaching gold extraction technology is sodium cyanide which is a highly toxic product, and the plant must be built to drip and extract gold in a closed workshop, so that the site and the gold extraction amount at each time are limited, only ores with high gold content can be extracted, and otherwise, the labor cost and the capital cost cause loss.
Disclosure of Invention
The invention aims to provide a low-grade gold ore biological heap leaching method, which is applicable to low-grade gold ores and waste ores which do not accord with the gold extraction cost originally, and has the advantages of high resource utilization rate, large extraction amount and low cost. All the processes can be recycled in the field, the solution and the product are not wasted, and the recovery rate is high.
In order to solve the problems in the prior art, the invention adopts the technical scheme that:
the invention relates to a biological heap leaching method for low-grade gold ores, which comprises the following steps:
forming a building ore pile by using raw ore or low-grade ore, and placing two layers of geotextile and one layer of plastic cloth at the bottom of the pile-sprinkling initial stage to prevent the bottom from leaking;
adjusting the alkalinity of the ore pile or the ore pulp by lime or caustic soda to adjust the pH value to 11-12;
thirdly, spraying the golden cicadas on the building ore heap by using a spraying pipe, wherein 400 g-2000 g of the golden cicadas are added into each ton of the ore heap, and the mass concentration of the golden cicadas is 0.3-1.5 per thousand;
fourthly, the obtained solution flows into a precious liquid pool, the solution in the precious liquid pool is filled into a carbon tank, carbon adsorption is carried out to obtain gold mud, and finally gold is obtained through extraction;
fifthly, the solution enters a carbon tank from the pregnant solution pool for carbon adsorption, the produced solution without gold flows into the barren solution pool, a cicada is added into the backwater, the pH value is regulated again to be 11-12, then the solution is directly pumped into the ore heap by a pump for recycling, and the leached tailings are directly dumped in situ in a tailing pond for stockpiling.
Furthermore, partition walls are arranged around the ore yard, the height of each partition wall is 1.5 m, a ditch is arranged, the agent outside the ore yard is intercepted, and the agent flows into the ditch, then enters the liquid collecting pool and then flows into the precious liquid pool.
Further, the optimal mass concentration of the cicadas is 1.2 per mill.
The invention has the advantages and beneficial effects that:
the biological heap leaching method for the low-grade gold ore uses environment-friendly gold cicadas, is pollution-free and emission-free, so that the biological heap leaching method can be carried out in an outdoor open place, a factory is not needed, ore screening and carbon slurry are not needed, and a large amount of capital and labor cost are saved. The solution flows into the barren liquor pool after carbon adsorption from the pregnant liquor pool and then is pumped into the ore heap again for dripping, and whether the solution needs to be blended is only required to be checked when the solution flows back into the barren liquor, so that a large amount of labor is saved by recycling. The cost is reduced and is not limited by the field, the heap leaching gold extraction method is suitable for low-grade gold ores and waste ores which do not meet the gold extraction cost originally, the resource utilization rate is high, the extraction amount is large, and the cost is low. All the processes can be recycled in the field, the solution and the product are not wasted, and the recovery rate is high.
Drawings
FIG. 1 is a flow chart of the biological heap leaching method for low-grade gold ore.
Detailed Description
In order to further illustrate the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, which should not be construed as limiting the scope of the present invention.
As shown in figure 1, the biological heap leaching method for low-grade gold ore comprises the following steps:
the method comprises the following steps that firstly, raw ore or low-grade ore directly participates in a gold extraction process, the raw ore or the low-grade ore forms a building ore pile, and two layers of geotextile and one layer of plastic cloth are placed at the bottom of the pile pouring initial stage to prevent bottom leakage;
adjusting the alkalinity of the ore pile or the ore pulp by lime or caustic soda to adjust the pH value to 11-12;
thirdly, spraying nontoxic environment-friendly gold ore dressing chemical cicadas to the building ore heap by using a spraying pipe on the ore heap, wherein 400-2000 g of cicadas are added into each ton of ore heap, and the mass concentration of the cicadas is 0.3-1.5 per thousand; the optimal mass concentration of the cicadas is 1.2 per mill. The cicada is an environment-friendly gold beneficiation agent produced by Guangxi Sen and Hi-Tech technologies GmbH.
Fourthly, the obtained solution flows into a precious liquid pool, the solution in the precious liquid pool is filled into a carbon tank, carbon adsorption is carried out to obtain gold mud, and finally gold is obtained through extraction;
fifthly, after the solution enters a carbon tank from the pregnant solution tank for carbon adsorption, the produced solution without gold flows into a barren solution tank, a cicada is replenished with backwater, the pH value is regulated again to be kept between 11 and 12, and then the solution is directly pumped into a rock pile by a pump for cyclic utilization without discharge and pollution, thereby achieving zero emission and zero pollution. And directly piling the leached tailings in a local waste tailing pond. The cicada drug supplementing quantity = (optimal mass concentration value-current mass concentration value) x barren liquor pool water quantity. And when the barren liquor pool is used as 500 square water, the medicine supplement amount is as follows: (1.2-0.6) x 500=300 kg.
After the cicada is supplemented with the reclaimed backwater, adjusting and keeping the pH value to be 11-12 by using lime or caustic soda; when the pH value of the return water is reduced, adjusting the alkali in time; when the pH value is more than 13 for a long time, alkali scale is easy to generate to influence the adsorption of the activated carbon, or liquid passivation occurs to influence the leaching effect, clear water is added to dilute the pH value, and a proper amount of sulfuric acid is added to reduce the pH value to reach the ideal alkalinity if the pH value is too high and necessary.
The periphery of the ore storage yard is provided with isolation walls, the height of each isolation wall is 1.5 meters, and each isolation wall is provided with a ditch to intercept the medicament outside the ore storage yard, and the medicament flows into the ditch, then enters the liquid collecting tank and then flows into the precious liquid tank.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The invention relates to a biological heap leaching method for low-grade gold ores, which comprises the following steps:
forming a building ore pile by using raw ore or low-grade ore, and placing two layers of geotextile and one layer of plastic cloth at the bottom of the pile-sprinkling initial stage to prevent the bottom from leaking;
adjusting the alkalinity of the ore pile or the ore pulp by lime or caustic soda to adjust the pH value to 11-12;
thirdly, spraying the golden cicadas on the building ore heap by using a spraying pipe, wherein 400 g-2000 g of the golden cicadas are added into each ton of the ore heap, and the mass concentration of the golden cicadas is 0.3-1.5 per thousand;
fourthly, the obtained solution flows into a precious liquid pool, the solution in the precious liquid pool is filled into a carbon tank, carbon adsorption is carried out to obtain gold mud, and finally gold is obtained through extraction;
fifthly, the solution enters a carbon tank from the pregnant solution pool for carbon adsorption, the produced solution without gold flows into the barren solution pool, a cicada is added into the backwater, the pH value is regulated again to be 11-12, then the solution is directly pumped into the ore heap by a pump for recycling, and the leached tailings are directly dumped in situ in a tailing pond for stockpiling.
2. The biological heap leaching method for low-grade gold ores according to claim 1, characterized by comprising the following steps: the periphery of the ore storage yard is provided with isolation walls, the height of each isolation wall is 1.5 meters, and each isolation wall is provided with a ditch, so that the agent outside the ore storage yard is intercepted, flows into the ditch, then enters a liquid collecting tank, and then flows into a precious liquid tank.
3. The biological heap leaching method for low-grade gold ores according to claim 1, characterized by comprising the following steps: the optimal mass concentration of the cicadas is 1.2 per mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418938.4A CN113122714A (en) | 2019-12-31 | 2019-12-31 | Biological heap leaching gold extraction method for low-grade gold ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418938.4A CN113122714A (en) | 2019-12-31 | 2019-12-31 | Biological heap leaching gold extraction method for low-grade gold ore |
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| Publication Number | Publication Date |
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| CN113122714A true CN113122714A (en) | 2021-07-16 |
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| CN201911418938.4A Pending CN113122714A (en) | 2019-12-31 | 2019-12-31 | Biological heap leaching gold extraction method for low-grade gold ore |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337402A (en) * | 2011-10-26 | 2012-02-01 | 广州有色金属研究院 | Extraction method of gold from gold-containing sulfur ore concentrate |
| CN103882240A (en) * | 2014-04-16 | 2014-06-25 | 芒市海华开发有限公司 | Method and equipment for extracting gold and silver from smelting slag |
| CN103981375A (en) * | 2014-05-30 | 2014-08-13 | 内蒙古太平矿业有限公司 | Gold extraction method by heap leaching |
| CN104195347A (en) * | 2014-09-17 | 2014-12-10 | 招远市招金贵合科技有限公司 | Process for enriching gold and silver from pyrite cinder and method for extracting gold and silver |
| CN105567993A (en) * | 2015-12-29 | 2016-05-11 | 安徽牛山新型材料科技有限公司 | Beneficiation method for low grade oxidized type gold and silver contained tailings |
| CN107988489A (en) * | 2017-12-05 | 2018-05-04 | 西安天宙矿业科技开发有限责任公司 | New method is leached in a kind of Carbonaceous gold ore insulation |
| CN108823406A (en) * | 2018-06-29 | 2018-11-16 | 安龙县豹子洞金矿有限责任公司 | A kind of method that low-grade gold infiltration extracts gold from |
-
2019
- 2019-12-31 CN CN201911418938.4A patent/CN113122714A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337402A (en) * | 2011-10-26 | 2012-02-01 | 广州有色金属研究院 | Extraction method of gold from gold-containing sulfur ore concentrate |
| CN103882240A (en) * | 2014-04-16 | 2014-06-25 | 芒市海华开发有限公司 | Method and equipment for extracting gold and silver from smelting slag |
| CN103981375A (en) * | 2014-05-30 | 2014-08-13 | 内蒙古太平矿业有限公司 | Gold extraction method by heap leaching |
| CN104195347A (en) * | 2014-09-17 | 2014-12-10 | 招远市招金贵合科技有限公司 | Process for enriching gold and silver from pyrite cinder and method for extracting gold and silver |
| CN105567993A (en) * | 2015-12-29 | 2016-05-11 | 安徽牛山新型材料科技有限公司 | Beneficiation method for low grade oxidized type gold and silver contained tailings |
| CN107988489A (en) * | 2017-12-05 | 2018-05-04 | 西安天宙矿业科技开发有限责任公司 | New method is leached in a kind of Carbonaceous gold ore insulation |
| CN108823406A (en) * | 2018-06-29 | 2018-11-16 | 安龙县豹子洞金矿有限责任公司 | A kind of method that low-grade gold infiltration extracts gold from |
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