CN104726716A - Method for extracting gold from cyanidation tailings - Google Patents
Method for extracting gold from cyanidation tailings Download PDFInfo
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- CN104726716A CN104726716A CN201510148846.4A CN201510148846A CN104726716A CN 104726716 A CN104726716 A CN 104726716A CN 201510148846 A CN201510148846 A CN 201510148846A CN 104726716 A CN104726716 A CN 104726716A
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- cyanidation tailings
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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
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Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to a method for extracting gold from cyanidation tailings, which comprises the following steps: the method comprises the steps of mixing cyanidation tailings, bentonite and calcium chloride in proportion, pelletizing, drying and roasting, volatilizing a compound formed by metal gold and chlorine in the form of smoke dust, spraying and washing the smoke dust, concentrating by a thickener and filter-pressing by ore pulp, and extracting gold from an obtained filter cake through cyanidation leaching.
Description
Technical field
The invention belongs to ore dressing field of metallurgy, particularly relate to a kind of method that chlorinating roasting extracts gold from cyanidation tailings.
Background technology
Along with the development of gold industry, domestic easy process gold ore base conditioning totally, arsenic-containing gold concentrate has become the main raw material of golden production.For simple gold ore, it is high that Cyanide Leaching method has the rate of recovery, low cost and other advantages.But for complicated golden ore concentrate, in cyanidation tailings, gold and silver content is still higher.According to incompletely statistics, end 2010, domestic gold system cyanidation tailings discharge capacity has arrived more than 2,450 ten thousand tons.
The processing scheme that cyanidation tailings is conventional comprises " preoxidation-cyaniding ", " pressure oxidation-cyaniding ", " bacterial oxidation ", techniques such as " chloridizing roastings ".Wherein Oxidation Leaching technique, gold recovery is on the low side, and other metallic elements cannot remove.High temperature chlorination roasting technique, gold recovery can reach more than 90%, and other metallic elements also can reach more than 80%, and after roasting, cyanidation tailings can fully utilize.
Containing golden about 5g/t in the solution of gold smelting plant cyanidation tailings of Xinjiang, argentiferous about 20g/t, in cyanidation tailings, other metal ions exceed standard on the one hand, cannot fully utilize, directly store up and take a large amount of soil, on the other hand, in this tailings, gold and silver grade is quite high, have very large recovery value, therefore the comprehensive utilization of cyanidation tailings has very important meaning.The domestic and international report about carrying gold from cyanidation tailings is more at present.Chinese patent CN101225468B discloses the method that magnetization chlorination process reclaims gold and silver, iron and lead from acid calcination slag, but the method is coal dust directly to be joined in pelletizing, ring formation of rotary kiln phenomenon in pellet strength and rotary kiln baking process is had a great impact, therefore the present invention is that kiln hood sprays into fine coal, adopts chlorinating roasting from cyanidation tailings, put forward the method for gold.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of method extracting gold from cyanidation tailings is provided.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
From cyanidation tailings, extract a method for gold, comprise the steps:
(1) get cyanidation tailings, calcium chloride, wilkinite be mixed in proportion, compound is carried out profit mill, make compound fineness-200 order grade account for mass ratio more than 80%;
(2) gained compound in step (1) is sent into disk pelletizing machine pelletizing, in balling process, spray the calcium chloride solution of gained in appropriate step (7);
(3) gained green pellets in step (2) is placed in drying grate inner drying;
(4) in step (3), dried pelletizing enters roasting in rotary kiln through drying grate chute, sprays into fine breeze provide heat by the coal injection pipe being positioned at rotary kiln end, acquisition hot-bulb group and flue gas after roasting completes;
(5) gained hot-bulb group is cooled to through shaft cooler and delivers to pelletizing stockyard after room temperature and be sold to Building Materials Factory as building materials raw material in step (4), in step (4), gained flue gas enters the hydrochloric acid soln adiabatic evaporation of U-shaped anticorrosion void tower and spray, gained washings filters to obtain flue dust and partially recycled valuable metal, and washings pumping circulation is washed;
(6) in step (5), after void tower washing, remaining flue gas enters tubulent contact tower and the further mixing, washing of hydrochloric acid/calcium chloride solution, hydrogen chloride gas in flue gas is all absorbed by solution, gained solution returns circulation groove after mixing with the new water supplemented after sodium hydroxide neutralizing treatment, the overflow that balance is formed enters void tower and supplements formation water balance, flue gas after tubulent contact tower washing, after electrostatic precipitator demist, enters the emptying of tail gas purification tower purification after-funnel through anticorrosion induced draft fan;
(7) in step (5), the washings of void tower outlet enters thickener concentrating clarifying, overflow returns void tower and continues circulation cleaning, the press filtration of gained thickened underflow pumping chamber filter press, press filtration gained filtrate through calcium oxide neutralization be treated to calcium chloride solution return in step (2) disk pelletizing machine spray, secondary press filtration after filter cake mixes with new water, gained filter cake is rich in gold and silver, and the washings of secondary press filtration returns tubulent contact tower;
(8) step (7) leaches through cyanide process with gained filter cake in step (5) and extracts gold.
Principal reaction principle of the present invention is as follows:
Principle 1: the decomposition of calcium chloride
2CaCl
2+O
2(g)＝2CaO+2Cl
2(g)
CaCl
2+O
2(g)+SO
2＝CaSO
4+Cl
2(g)
2CaCl
2+O
2(g)+2SiO
2＝2CaSiO
3+2Cl
2(g)
SiO in raw material
2, Fe
2o
3, Al
2o
3existence and gas phase in SO
2have the decomposition being beneficial to calcium chloride in tailings pelletizing.
Principle 2: the volatilization of gold
2Au(s)+3Cl
2(g)＝2AuCl
3(g)
2Au(s)+Cl
2(g)＝Au
2Cl
2(g)
The invention has the beneficial effects as follows: present invention process is simple, low to ingredient requirement, gold recovery is high, pellet strength is high, solve ring formation of rotary kiln phenomenon, adopt lower production cost to reclaim gold in cyanidation tailings, separately achieve in whole Production Flow Chart " zero waste discharge ", decrease environmental pollution, improve resource utilization.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described in step (1), calcium chloride consumption is 1 ~ 10wt% of cyanidation tailings, and described bentonite consumption is the 2wt% of cyanidation tailings.
The beneficial effect adopting above-mentioned further scheme is that raw material is fully used, and pellet strength is high.
Further, described in step (3), green pellets moisture content is 15 ~ 20wt%.
Further, point five sections of drying zones in described drying grate, front four sections of temperature are set as 100-200 DEG C, and the 5th section of temperature controls at 200 ~ 250 DEG C.
Further, described in step (4), maturing temperature is 1000 ~ 1250 DEG C, and roasting time is 4 ~ 5 hours.
Further, in step (5), the concentration of hydrochloric acid solution of spray is 10wt%.
Further, in step (6), hydrochloric acid/calcium chloride solution concentration is 2wt%, and the relative molar proportions of hydrochloric acid and calcium chloride is 1: 1.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention;
Embodiment
Be described principle of the present invention and feature below in conjunction with example, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1:
(1) get 10kg cyanidation tailings, 200g wilkinite, 100g calcium chloride joins in mixer and form compound, compound is carried out profit mill, make compound fineness-200 order grade account for mass ratio more than 80%;
(2) compound after profit mill is sent into the disk pelletizing mechanism grain that diameter is 5cm, in pelletization, spray the calcium chloride solution of gained in 1.2L step (7);
(3) it is dry that obtained pelletizing sends into drying grate, and be divided into five sections of drying zones in drying grate, front four sections of design temperatures are 80 DEG C, 100 DEG C, 120 DEG C, 150 DEG C, and the 5th section of temperature is set to 220 DEG C, pelletizing is dried to water content and is less than 0.5wt%;
(4) dried pelletizing enters rotary kiln baking through drying grate chute, heat is provided to control at 1050 DEG C by temperature by the fine breeze sprayed in the coal injection pipe of kiln hood in rotary kiln, roasting completes and obtains hot-bulb group and flue gas for 4 hours, and the hot-bulb group of gained enters and delivers to pelletizing stockyard after shaft cooler is cooled to room temperature and be sold to Building Materials Factory as building materials raw material;
(5) what obtain after roasting is rich in AuCl
3(g), Au
2cl
2g concentration that the flue gas of (), AgCl (g) enters U-shaped anticorrosion void tower and spray is the hydrochloric acid soln adiabatic evaporation of 10wt%, reaction generates metal A u, Ag, the mixture of gained hydrochloric acid soln and metal A u, Ag and flue dust after filtration, obtains partially recycled Au, Ag;
(6) after void tower washing, remaining flue gas enters the further mixing, washing of hydrochloric acid/calcium chloride solution of the 2wt% of tubulent contact tower and hydrochloric acid and calcium chloride mol ratio 1: 1, hydrogen chloride gas in flue gas is all absorbed by solution, circulation groove is returned after the sodium hydroxide of 5wt% neutralizes and fills into certain new water, the overflow that balance is formed enters void tower and supplements formation water balance, flue gas after tubulent contact tower washing, after electrostatic precipitator demist, enters the emptying of tail gas purification tower purification after-funnel through anticorrosion induced draft fan;
(7) washings of void tower outlet enters thickener concentrating clarifying, overflow returns void tower and continues circulation cleaning, the press filtration of gained thickened underflow pumping chamber filter press, press filtration gained filtrate through calcium oxide neutralization process become calcium chloride solution return in step (2) disk pelletizing machine spray, secondary press filtration after filter cake mixes with new water, gained filter cake is rich in gold and silver, and the washings of secondary press filtration returns tubulent contact tower;
(8) gained filter cake in step (5) and step (7) is used the sodium cyanide solution Cyanide Leaching of 20wt%, be 9 ~ 10 by the pH value of the sodium hydroxide solution regulation system of 5wt%, extraction time is 24 hours, and the rate of recovery of final gained Au reaches 86.5%.
Embodiment 2:
(1) get 10kg cyanidation tailings, 200g wilkinite, 500g calcium chloride joins in mixer and form compound, compound is carried out profit mill, make compound fineness-200 order grade account for mass ratio more than 80%;
(2) compound after profit mill is sent into the disk pelletizing mechanism grain that diameter is 5cm, in pelletization, spray the calcium chloride solution of gained in the step (7) of 1.5L;
(3) it is dry that obtained pelletizing sends into drying grate, and be divided into five sections of drying zones in drying grate, front four sections of design temperatures are 80 DEG C, 110 DEG C, 130 DEG C, 180 DEG C, and the 5th section of temperature is set to 235 DEG C, pelletizing is dried to water content and is less than 0.5wt%;
(4) dried pelletizing enters rotary kiln baking through drying grate chute, heat is provided to control at 1150 DEG C by temperature by the fine breeze sprayed in the coal injection pipe of kiln hood in rotary kiln, roasting completes and obtains hot-bulb group and flue gas for 4 hours, and the hot-bulb group of gained enters and delivers to pelletizing stockyard after shaft cooler is cooled to room temperature and be sold to Building Materials Factory as building materials raw material;
(5) what obtain after roasting is rich in AuCl
3(g), Au
2cl
2g concentration that the flue gas of (), AgCl (g) enters U-shaped anticorrosion void tower and spray is the hydrochloric acid soln adiabatic evaporation of 10wt%, reaction generates metal A u, Ag, the mixture of gained hydrochloric acid soln and metal A u, Ag and flue dust after filtration, obtains partially recycled Au, Ag;
(6) after void tower washing, remaining flue gas enters the further mixing, washing of hydrochloric acid/calcium chloride solution of the 2wt% of tubulent contact tower and hydrochloric acid and calcium chloride mol ratio 1: 1, hydrogen chloride gas in flue gas is all absorbed by solution, circulation groove is returned after the sodium hydroxide of 5wt% neutralizes and fills into certain new water, the overflow that balance is formed enters void tower and supplements formation water balance, flue gas after tubulent contact tower washing, after electrostatic precipitator demist, enters the emptying of tail gas purification tower purification after-funnel through anticorrosion induced draft fan;
(7) washings of void tower outlet enters thickener concentrating clarifying, overflow returns void tower and continues circulation cleaning, the press filtration of gained thickened underflow pumping chamber filter press, press filtration gained filtrate through calcium oxide neutralization process become calcium chloride solution return in step (2) disk pelletizing machine spray, secondary press filtration after filter cake mixes with new water, gained filter cake is rich in gold and silver, and the washings of secondary press filtration returns tubulent contact tower;
(8) gained filter cake in step (5) and step (7) is used the sodium cyanide solution Cyanide Leaching of 20wt%, be 9 ~ 10 by the pH value of the sodium hydroxide solution regulation system of 5wt%, extraction time is 24 hours, and the rate of recovery of final gained Au reaches 89.8%.
Embodiment 3:
(1) get 10kg cyanidation tailings, 200g wilkinite, 1000g calcium chloride joins in mixer and form compound, compound is carried out profit mill, make compound fineness-200 order grade account for mass ratio more than 80%;
(2) compound after profit mill is sent into the disk pelletizing mechanism grain that diameter is 5cm, in pelletization, spray the calcium chloride solution of gained in the step (7) of 1L;
(3) it is dry that obtained pelletizing sends into drying grate, and be divided into five sections of drying zones in drying grate, front four sections of design temperatures are 120 DEG C, 150 DEG C, 170 DEG C, 200 DEG C, and the 5th section of temperature is set to 250 DEG C, pelletizing is dried to water content and is less than 0.5wt%;
(4) dried pelletizing enters rotary kiln baking through drying grate chute, heat is provided to control at 1200 DEG C by temperature by the fine breeze sprayed in the coal injection pipe of kiln hood in rotary kiln, roasting completes and obtains hot-bulb group and flue gas for 5 hours, and the hot-bulb group of gained enters and delivers to pelletizing stockyard after shaft cooler is cooled to room temperature and be sold to Building Materials Factory as building materials raw material;
(5) what obtain after roasting is rich in AuCl
3(g), Au
2cl
2g concentration that the flue gas of (), AgCl (g) enters U-shaped anticorrosion void tower and spray is the hydrochloric acid soln adiabatic evaporation of 10wt%, reaction generates metal A u, Ag, the mixture of gained hydrochloric acid soln and metal A u, Ag and flue dust after filtration, obtains partially recycled Au, Ag;
(6) after void tower washing, remaining flue gas enters the further mixing, washing of hydrochloric acid/calcium chloride solution of the 2wt% of tubulent contact tower and hydrochloric acid and calcium chloride mol ratio 1: 1, hydrogen chloride gas in flue gas is all absorbed by solution, circulation groove is returned after the sodium hydroxide of 5wt% neutralizes and fills into certain new water, the overflow that balance is formed enters void tower and supplements formation water balance, flue gas after tubulent contact tower washing, after electrostatic precipitator demist, enters the emptying of tail gas purification tower purification after-funnel through anticorrosion induced draft fan;
(7) washings of void tower outlet enters thickener concentrating clarifying, overflow returns void tower and continues circulation cleaning, the press filtration of gained thickened underflow pumping chamber filter press, press filtration gained filtrate through calcium oxide neutralization process become calcium chloride solution return in step (2) disk pelletizing machine spray, secondary press filtration after filter cake mixes with new water, gained filter cake is rich in gold and silver, and the washings of secondary press filtration returns tubulent contact tower;
(8) gained filter cake in step (5) and step (7) is used the sodium cyanide solution Cyanide Leaching of 20wt%, be 9 ~ 10 by the pH value of the sodium hydroxide solution regulation system of 5wt%, extraction time is 24 hours, and the rate of recovery of final gained Au reaches 88.9%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in invention.
Claims (9)
1. from cyanidation tailings, extract a method for gold, comprise the steps:
(1) get cyanidation tailings, calcium chloride, wilkinite be mixed in proportion, compound is carried out profit mill, make compound fineness-200 order grade account for mass ratio more than 80%;
(2) gained compound in step (1) is sent into disk pelletizing machine pelletizing, in balling process, spray the calcium chloride solution of gained in appropriate step (7);
(3) gained green pellets in step (2) is placed in drying grate inner drying;
(4) in step (3), dried pelletizing enters roasting in rotary kiln through drying grate chute, sprays into fine breeze provide heat by the coal injection pipe being positioned at rotary kiln end, acquisition hot-bulb group and flue gas after roasting completes;
(5) gained hot-bulb group is cooled to through shaft cooler and delivers to pelletizing stockyard after room temperature and be sold to Building Materials Factory as building materials raw material in step (4), in step (4), gained flue gas enters the hydrochloric acid soln adiabatic evaporation of U-shaped anticorrosion void tower and spray, gained washings filters to obtain flue dust and partially recycled valuable metal, and washings pumping circulation is washed;
(6) in step (5), after void tower washing, remaining flue gas enters tubulent contact tower and the further mixing, washing of hydrochloric acid/calcium chloride solution, hydrogen chloride gas in flue gas is all absorbed by solution, gained solution returns circulation groove after mixing with the new water supplemented after sodium hydroxide neutralizing treatment, the overflow that balance is formed enters void tower and supplements formation water balance, flue gas after tubulent contact tower washing, after electrostatic precipitator demist, enters the emptying of tail gas purification tower purification after-funnel through anticorrosion induced draft fan;
(7) in step (5), the washings of void tower outlet enters thickener concentrating clarifying, overflow returns void tower and continues circulation cleaning, the press filtration of gained thickened underflow pumping chamber filter press, press filtration gained filtrate through calcium oxide neutralization be treated to calcium chloride solution return in step (2) disk pelletizing machine spray, secondary press filtration after filter cake mixes with new water, gained filter cake is rich in gold and silver, and the washings of secondary press filtration returns tubulent contact tower;
(8) step (7) leaches through cyanide process with gained filter cake in step (5) and extracts gold.
2. a kind of method extracting gold from cyanidation tailings according to claim 1, it is characterized in that, described in step (1), calcium chloride consumption is 1 ~ 10wt% of cyanidation tailings, and described bentonite consumption is the 2wt% of cyanidation tailings.
3. a kind of method extracting gold from cyanidation tailings according to claim 1 and 2, it is characterized in that, described in step (3), green pellets moisture content is 15 ~ 20wt%.
4. a kind of method extracting gold from cyanidation tailings according to claim 3, is characterized in that, after dry in described step (3), pelletizing moisture content is less than 0.5wt%.
5. a kind of method extracting gold from cyanidation tailings according to any one of claim 4, is characterized in that, point five sections of drying zones in described drying grate, front four sections of temperature are set as 100-200 DEG C, and the 5th section of temperature controls at 200 ~ 250 DEG C.
6. a kind of method extracting gold from cyanidation tailings according to claim 1, it is characterized in that, described in step (4), maturing temperature is 1000 ~ 1250 DEG C, and roasting time is 4 ~ 5 hours.
7. a kind of method extracting gold from cyanidation tailings according to claim 1 and 2, it is characterized in that, in described step (5), the concentration of hydrochloric acid solution of spray is 10wt%.
8. a kind of method extracting gold from cyanidation tailings according to claim 1 and 2, it is characterized in that, in described step (6), hydrochloric acid/calcium chloride solution concentration is 2wt%, and the relative molar proportions of hydrochloric acid and calcium chloride is 1: 1.
9. a kind of method extracting gold from cyanidation tailings according to claim 1 and 2, it is characterized in that, in described step (7), filtrate pH value after calcium oxide neutralization is 7.0-8.0.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011486A (en) * | 2016-06-03 | 2016-10-12 | 新疆星塔矿业有限公司 | Recovery technology for metals in gold ore cyanide residue chloridizing volatilization flue gas |
| CN106474855A (en) * | 2016-12-03 | 2017-03-08 | 新疆星塔矿业有限公司 | A kind of method of high-temperature flue gas washing, purifying |
| CN106676256A (en) * | 2017-01-11 | 2017-05-17 | 招金矿业股份有限公司技术中心 | Environmental protection gold extraction technology of unwieldiness gold concentrate |
| CN107557570A (en) * | 2017-10-30 | 2018-01-09 | 北京矿冶研究总院 | Method for comprehensively recovering valuable metals from cyanidation tailings |
| CN107935022A (en) * | 2017-12-08 | 2018-04-20 | 南丹县南方有色金属有限责任公司 | A kind of zinc oxide desulfurization washing system |
| CN108251639A (en) * | 2017-12-20 | 2018-07-06 | 甘肃招金贵金属冶炼有限公司 | A kind of method for improving refined gold ore cyaniding tailings volatility |
| WO2019114198A1 (en) * | 2017-12-13 | 2019-06-20 | 北京工业大学 | Method for calcining cyanidation slag to recover valuable metals and synchronously prepare ceramsite |
| WO2019120368A1 (en) * | 2017-12-22 | 2019-06-27 | Engineering Dobersek GmbH | Method, unit and precious metal extraction unit for improving the yield in precious metal extraction by sorption-leaching processes |
| CN111172405A (en) * | 2020-02-27 | 2020-05-19 | 北京矿冶科技集团有限公司 | Microwave rotary hearth furnace chlorination gold extraction device and method |
| CN111996364A (en) * | 2020-08-31 | 2020-11-27 | 中南大学 | Method for recovering gold from cyanidation tailings and synchronously magnetizing iron |
| CN114213144A (en) * | 2022-02-23 | 2022-03-22 | 山东恒远利废技术股份有限公司 | Method for treating cyanidation tailing sludge and preparing ceramsite simultaneously |
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| CN103981370A (en) * | 2014-05-27 | 2014-08-13 | 招远市招金金合科技有限公司 | Comprehensive recycling method of cyanide tailing slag |
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|---|---|---|---|---|
| CN106011486A (en) * | 2016-06-03 | 2016-10-12 | 新疆星塔矿业有限公司 | Recovery technology for metals in gold ore cyanide residue chloridizing volatilization flue gas |
| CN106474855A (en) * | 2016-12-03 | 2017-03-08 | 新疆星塔矿业有限公司 | A kind of method of high-temperature flue gas washing, purifying |
| CN106676256A (en) * | 2017-01-11 | 2017-05-17 | 招金矿业股份有限公司技术中心 | Environmental protection gold extraction technology of unwieldiness gold concentrate |
| CN107557570A (en) * | 2017-10-30 | 2018-01-09 | 北京矿冶研究总院 | Method for comprehensively recovering valuable metals from cyanidation tailings |
| CN107935022A (en) * | 2017-12-08 | 2018-04-20 | 南丹县南方有色金属有限责任公司 | A kind of zinc oxide desulfurization washing system |
| CN107935022B (en) * | 2017-12-08 | 2024-05-10 | 南丹县南方有色金属有限责任公司 | Zinc oxide desulfurization washing system |
| US10626053B2 (en) | 2017-12-13 | 2020-04-21 | Beijing University Of Technology | Method for recovering valuable metals and simultaneously preparing ceramsite by roasting cyanide tailing |
| WO2019114198A1 (en) * | 2017-12-13 | 2019-06-20 | 北京工业大学 | Method for calcining cyanidation slag to recover valuable metals and synchronously prepare ceramsite |
| CN108251639A (en) * | 2017-12-20 | 2018-07-06 | 甘肃招金贵金属冶炼有限公司 | A kind of method for improving refined gold ore cyaniding tailings volatility |
| WO2019120368A1 (en) * | 2017-12-22 | 2019-06-27 | Engineering Dobersek GmbH | Method, unit and precious metal extraction unit for improving the yield in precious metal extraction by sorption-leaching processes |
| EA039147B1 (en) * | 2017-12-22 | 2021-12-10 | Энджиниринг Доберсек Гмбх | Process, unit and precious metal extraction unit for improving the yield for precious metal extraction in a sorption-leaching process |
| CN111172405A (en) * | 2020-02-27 | 2020-05-19 | 北京矿冶科技集团有限公司 | Microwave rotary hearth furnace chlorination gold extraction device and method |
| CN111172405B (en) * | 2020-02-27 | 2024-07-26 | 北京矿冶科技集团有限公司 | Gold extraction device and method for chlorination of microwave rotary hearth furnace |
| CN111996364A (en) * | 2020-08-31 | 2020-11-27 | 中南大学 | Method for recovering gold from cyanidation tailings and synchronously magnetizing iron |
| CN111996364B (en) * | 2020-08-31 | 2022-01-11 | 中南大学 | Method for recovering gold from cyanidation tailings and synchronously magnetizing iron |
| CN114213144A (en) * | 2022-02-23 | 2022-03-22 | 山东恒远利废技术股份有限公司 | Method for treating cyanidation tailing sludge and preparing ceramsite simultaneously |
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