CN103937989A - Arsenic-bearing gold concentrate treatment technology - Google Patents
Arsenic-bearing gold concentrate treatment technology Download PDFInfo
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- CN103937989A CN103937989A CN201410137624.8A CN201410137624A CN103937989A CN 103937989 A CN103937989 A CN 103937989A CN 201410137624 A CN201410137624 A CN 201410137624A CN 103937989 A CN103937989 A CN 103937989A
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- gold
- leaching
- arsenic
- roasting
- ore pulp
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 58
- 239000010931 gold Substances 0.000 title claims abstract description 58
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 44
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical group [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000012141 concentrate Substances 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title abstract description 5
- 238000002386 leaching Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000007670 refining Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 34
- FYEHYMARPSSOBO-UHFFFAOYSA-N Aurin Chemical compound C1=CC(O)=CC=C1C(C=1C=CC(O)=CC=1)=C1C=CC(=O)C=C1 FYEHYMARPSSOBO-UHFFFAOYSA-N 0.000 claims description 18
- 241001060848 Carapidae Species 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 15
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 238000005987 sulfurization reaction Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000019635 sulfation Effects 0.000 abstract 1
- 238000005670 sulfation reaction Methods 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000011084 recovery Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- BMWMWYBEJWFCJI-UHFFFAOYSA-K iron(3+);trioxido(oxo)-$l^{5}-arsane Chemical compound [Fe+3].[O-][As]([O-])([O-])=O BMWMWYBEJWFCJI-UHFFFAOYSA-K 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an arsenic-bearing gold concentrate treatment technology which comprises the following steps: 1) evenly mixing the gold concentrate according to the ore proportioning requirement; 2) airing the evenly mixed gold concentrate until the water content is no more than 8%; 3) feeding the gold concentrate powder into a roasting furnace for sulfation roasting at the roasting temperature of 630-700DEG C, and roasting for 1.5-2.5 hours; 4) delivering the roasted slag into a leaching tank, adding water to prepare ore pulp according to the condition that the ratio of liquid to solid is (1-1.5):1, then stirring and adding concentrated sulfuric acid as a leaching agent, and leaching at the leaching temperature of 90-150DEG C for 2-4 hours; 5) after leaching is over, performing solid-liquid separation, washing the leached slag, then adding base to prepare an ore pulp, delivering to a cyaniding workshop section for cyaniding and leaching, then performing solid-liquid separation again, replacing the cyanided leachate to produce gold mud, refining the gold mud to produce gold. The technology is simple, and can be used for overcoming the defects that the dearsenificaiton is halfway and secondary coating is formed and the like; the dearsenification effect is good, the leaching rate of the gold is high and up to more than 97%.
Description
Technical field
The invention belongs to Treatment Technique in Gold Ore field, be specifically related to a kind of arsenic-containing gold concentrate treatment process.
Background technology
In recent years, along with the rising all the way of the price of gold, reached 1890 dollars/ounce, the development of Gold Industry has entered the white-hot stage especially, mine development also thereupon fanaticism get up.All has shone the youth again in the mine that originally dilution cannot be exploited, after fanatic, be more dilution and scarcity, especially after overexploitation high-quality, that do not contain assorted good processing ore deposit, good mine is fewer and feweri, and containing carbonaceous, containing arsenic, the unmanageable ore deposit such as microfine becomes main flow, particularly just very extensive comparatively speaking containing arsenic minerals.But adopting traditional gold extraction process to be all difficult to process, both just allocated on a small quantity good ore deposit of processing into and carried out conventional processing, produce little effect yet, is not that the rate of recovery is not high, be exactly that cost is very high and cannot produce, therefore much all shelve, fall into disuse containing arsenic minerals mountain.At present, conventional high arsenic fine gold ore treatment process is mainly following two kinds:
1) two-stage roasting pre-treatment Cyanide Process.Existing two or three enterprise of this technique used, and is applicable to scale production.This technique is first anoxic roasting, makes arsenic distillation, oxidation receive arsenic dearsenification, and then carries out sulfurization roasting, and calcining is cyanidation gold-extracted.But this technique arsenic-removing rate is in 90% left and right, if contain arsenic in concentrate higher than more than 5%, take off in the calcining of arsenic and also contained nearly 0.5% arsenic, and this part of arsenic not removing is still wrapped in gold, meanwhile, the iron polymers such as the ferric arsenate forming when roasting wrap up golden secondary, cause the golden rate of recovery not high, generally, below 85%, not only cause the wasting of resources, and cannot exploit because price is low.
2) rotary kiln low-temperature bake arsenic removal process.This technique is to utilize coal heating, and arsenic in arsenic-containing gold concentrate is removed, and then calcining is cyanidation gold-extracted.The method can remove the arsenic in concentrate, but due to roasting condition restriction, arsenic-removing rate is not high, is up to 85%, and because temperature is low, in concentrate, sulfurous iron ore does not react substantially, wrapping up golden sulphur iron cpd does not have destroyedly, and gold leaching rate, the rate of recovery are not high, conventionally only have 70-80%, when in concentrate, arsenic exceedes 5%, the rate of recovery is lower.Not only can say without benefit, and be difficult to ensure to produce continuously, environment is also very severe, and this kind of method usually adopted by the small-sized scale production of individual.
In addition, also have four jiaos of stove bakings etc., but it is because method is simple and crude, environment is poor, danger coefficient is high, and can not carries out large-scale production.Therefore,, at present in Development of Gold Industry field, there urgently have to be new, good containing arsenic minerals treatment process.
Summary of the invention
The object of the invention is to provide a kind of high arsenic fine gold ore treatment process, and this technique is simple, and effect of removing arsenic is better, and the leaching yield of gold is higher.
For defect in current arsenic removal technology, in line with effectively processing arsenic-containing gold concentrate, and the object that technique is simple, gold recovery is high, cost is controlled, the application probes boldly, browse great mass of data, carry out often reaching the experiment of 2 years, and through the production practice of half a year, carried out multiple batches of more than totally 30000 tons, containing arsenic in 0.5-8% production, through repeatedly repeatedly improving, finally sum up a kind of novel process of efficient processing arsenic-containing gold concentrate, described this technical scheme (if no special instructions, all referring to weight percent in literary composition) below in detail:
A kind of arsenic-containing gold concentrate treatment process, it comprises the steps:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) aurin powder airing to the water content after mixing is not more than to 8%;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 630-700 DEG C of maturing temperatures, roasting time 1.5-2.5 hours;
4) slag after roasting is sent into leaching vat, add water and be mixed with ore pulp by liquid-solid ratio 1-1.5:1, and then stir add the vitriol oil of concentration 98% to leach as leaching agent, 90-150 DEG C of extraction temperatures, extraction time 2-4 hours;
5) leach and finish rear solid-liquid separation, gained leached mud (now, iron level in leached mud is 7-8%, copper content < 0.1%) add alkali and be again mixed with ore pulp and slurry pH is remained between 9-10 after washing, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.
Concrete, when step 3) sulfurization roasting, excess oxygen coefficient is 1. 15-1.3, and gas residence time is 27-32 seconds, and fluidized bed gas speed is 1-1.2m/s.
In step 4), stirring velocity is preferably 35-40 r/min.
In step 4), the addition of the vitriol oil preferably accounts for 20-50% of ore pulp quality.
In step 4), extraction temperature is preferably 100-110 DEG C.
Innovative point of the present invention is the mixing gold ore containing arsenic in stoving oven, to carry out in advance sulfurization roasting, then carry out high temperature leaching with the vitriol oil as leaching agent, in order to the nuisances such as arsenate, iron, antimony are leached in liquid, then filter solid-liquid separation, then reach the object of removal of impurities by solid-liquid separation.Compared to the prior art, treatment process of the present invention is simple, has overcome the defects such as dearsenification is clean, formation secondary parcel, and effect of removing arsenic is better, and the leaching yield of gold is higher, reaches more than 97%.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited to this.
embodiment 1
To process 6146 tons of gold ore containing arsenic 2.1%, golden 52g/t, sulfur-bearing 22% as example, its concrete treatment process steps is as follows:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) be 8% aurin powder airing to the water content after mixing;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 630 DEG C of maturing temperatures, roasting time 2.5 hours; When roasting, excess oxygen coefficient is 1.2, and gas residence time is 30 seconds, and fluidized bed gas speed is 1.1m/s;
4) slag after roasting is sent into leaching vat, by liquid-solid ratio, 1:1(refers to mass ratio, lower same) adding water is mixed with ore pulp, and then stirring adds the vitriol oil of concentration 98% as leaching agent (stirring velocity 38 r/min, the addition of the vitriol oil account for ore pulp quality 40%) leach, 100 DEG C of extraction temperatures, extraction time 4 hours;
5) leach and finish rear solid-liquid separation, after the washing of gained leached mud, add alkali and be mixed with ore pulp and slurry pH is remained between 9-10, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.Gold leaching rate is 97.1%, and slag rate is 55%, and tailings is 2.74g/t.
embodiment 2
To process 3756 tons of gold ore containing arsenic 6%, golden 45g/t, sulfur-bearing 21% as example, its concrete treatment process steps is as follows:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) be 6% aurin powder airing to the water content after mixing;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 670 DEG C of maturing temperatures, roasting time 2 hours; When roasting, excess oxygen coefficient is 1.3, and gas residence time is 30 seconds, and fluidized bed gas speed is 1.1m/s;
4) slag after roasting is sent into leaching vat, add water and be mixed with ore pulp by liquid-solid ratio 1.5:1, and then stirring adds the vitriol oil of concentration 98% as leaching agent (stirring velocity 38 r/min, the addition of the vitriol oil account for ore pulp quality 48%) leach, 110 DEG C of extraction temperatures, extraction time 2 hours;
5) leach and finish rear solid-liquid separation, after the washing of gained leached mud, add alkali and be mixed with ore pulp and slurry pH is remained between 9-10, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.Gold leaching rate is 96.1%, and slag rate is 58%, and tailings is 3.02g/t.
embodiment 3
To process 10233 tons of gold ore containing arsenic 0.5%, golden 41g/t, sulfur-bearing 23% as example, its treatment process steps is as follows:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) be 8% aurin powder airing to the water content after mixing;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 700 DEG C of maturing temperatures, roasting time 1.5 hours; When roasting, excess oxygen coefficient is 1.2, and gas residence time is 30 seconds, and fluidized bed gas speed is 1.1m/s;
4) slag after roasting is sent into leaching vat, add water and be mixed with ore pulp by liquid-solid ratio 1.2:1, and then stirring adds the vitriol oil of concentration 98% as leaching agent (stirring velocity 38 r/min, the addition of the vitriol oil account for ore pulp quality 30%) leach, 100 DEG C of extraction temperatures, extraction time 3 hours;
5) leach and finish rear solid-liquid separation, after the washing of gained leached mud, add alkali and be mixed with ore pulp and slurry pH is remained between 9-10, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.Gold leaching rate is 98.6%, and slag rate is 53%, and tailings is 1.08g/t.
embodiment 4
To process 9155 tons of gold ore containing arsenic 8%, golden 63g/t, sulfur-bearing 25% as example, its concrete treatment process steps is as follows:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) be 7% aurin powder airing to the water content after mixing;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 680 DEG C of maturing temperatures, roasting time 2 hours; When roasting, excess oxygen coefficient is 1. 2, and gas residence time is 30 seconds, and fluidized bed gas speed is 1.1m/s;
4) slag after roasting is sent into leaching vat, add water and be mixed with ore pulp by liquid-solid ratio 1.3:1, and then stirring adds the vitriol oil of concentration 98% as leaching agent (stirring velocity 38 r/min, the addition of the vitriol oil account for ore pulp quality 50%) leach, 110 DEG C of extraction temperatures, extraction time 3 hours;
5) leach and finish rear solid-liquid separation, after the washing of gained leached mud, add alkali and be mixed with ore pulp and slurry pH is remained between 9-10, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.Gold leaching rate is 95.5%, and slag rate is 49%, and tailings is 5.78g/t.
Claims (5)
1. an arsenic-containing gold concentrate treatment process, is characterized in that: comprise the steps:
1) by containing arsenic < 6%, carbon < 3%, sulphur > 20%, golden > 40g/t, copper < 0.5%, plumbous zinc < 3% join ore deposit requirement, aurin powder is mixed;
2) aurin powder airing to the water content after mixing is not more than to 8%;
3) by step 2) gained aurin powder sends in stoving oven and carries out sulfurization roasting, 630-700 DEG C of maturing temperatures, roasting time 1.5-2.5 hours;
4) slag after roasting is sent into leaching vat, add water and be mixed with ore pulp by liquid-solid ratio 1-1.5:1, and then stir add the vitriol oil to leach as leaching agent, 90-150 DEG C of extraction temperatures, extraction time 2-4 hours;
5) leach and finish rear solid-liquid separation, after the washing of gained leached mud, add alkali and be mixed with ore pulp and slurry pH is remained between 9-10, then ore pulp is delivered to cyaniding workshop section Cyanide Leaching, again after solid-liquid separation, zinc dust precipitation output gold mud for Cyanide Leaching liquid, after gold mud is refining, output gold.
2. arsenic-containing gold concentrate treatment process as claimed in claim 1, is characterized in that: when step 3) sulfurization roasting, excess oxygen coefficient is 1. 15-1.3, and gas residence time is 27-32 seconds, and fluidized bed gas speed is 1-1.2m/s.
3. arsenic-containing gold concentrate treatment process as claimed in claim 1, is characterized in that: in step 4), stirring velocity is 35-40 r/min.
4. arsenic-containing gold concentrate treatment process as claimed in claim 1, is characterized in that: in step 4), the addition of the vitriol oil accounts for 20-50% of ore pulp quality.
5. arsenic-containing gold concentrate treatment process as claimed in claim 1, is characterized in that: 100-110 DEG C of extraction temperatures in step 4).
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| CN201410137624.8A CN103937989B (en) | 2014-04-08 | 2014-04-08 | Arsenic-bearing gold concentrate treatment technology |
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| CN201410137624.8A CN103937989B (en) | 2014-04-08 | 2014-04-08 | Arsenic-bearing gold concentrate treatment technology |
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| CN103937989B CN103937989B (en) | 2015-06-10 |
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| CN104831084A (en) * | 2015-03-30 | 2015-08-12 | 唐志宇 | Method for extraction of gold from iron oxide-class wrapped difficult-to-treat tailing |
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| CN105779776A (en) * | 2014-12-24 | 2016-07-20 | 李瑶 | Method for recycling gold from roasting residues or roasting-leaching residues of gold concentrate |
| CN105838901A (en) * | 2016-04-01 | 2016-08-10 | 中南大学 | Method for extracting gold by conducting roasting pretreatment on gold ore containing arsenic, sulfur and carbon |
| CN107034353A (en) * | 2017-04-27 | 2017-08-11 | 中南大学 | A kind of method of low-temperature bake acidleach dissociation gold |
| CN111519026A (en) * | 2020-04-30 | 2020-08-11 | 西安建筑科技大学 | Method for leaching secondary coated gold hematite |
| CN111635996A (en) * | 2020-06-16 | 2020-09-08 | 江西一元再生资源有限公司 | Recovery method of arsenic-containing gold concentrate |
| CN112143907A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for improving leaching rate of gold and silver in arsenic-containing gold concentrate |
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| CN105838901A (en) * | 2016-04-01 | 2016-08-10 | 中南大学 | Method for extracting gold by conducting roasting pretreatment on gold ore containing arsenic, sulfur and carbon |
| CN105838901B (en) * | 2016-04-01 | 2018-05-25 | 中南大学 | A kind of sulfur-bearing arsenic Carbonaceous gold ore roasting pretreatment Method for extracting gold |
| CN107034353A (en) * | 2017-04-27 | 2017-08-11 | 中南大学 | A kind of method of low-temperature bake acidleach dissociation gold |
| CN111519026A (en) * | 2020-04-30 | 2020-08-11 | 西安建筑科技大学 | Method for leaching secondary coated gold hematite |
| CN111519026B (en) * | 2020-04-30 | 2022-01-18 | 西安建筑科技大学 | Method for leaching secondary coated gold hematite |
| CN111635996A (en) * | 2020-06-16 | 2020-09-08 | 江西一元再生资源有限公司 | Recovery method of arsenic-containing gold concentrate |
| CN112143907A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for improving leaching rate of gold and silver in arsenic-containing gold concentrate |
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Effective date of registration: 20171221 Address after: No. 9, Zhongshan Avenue, Chaoyang City, Liaoning, Liaoning Patentee after: Liaoning Xindu gold limited liability company Address before: 472500 Jincheng Road City, Lingbao City, Sanmenxia, Henan province (Jincheng metallurgical limited liability company of Lingbao City) Patentee before: Nan Junfang |