CN106498178A - A kind of recovery carries golden method in bronze charcoal - Google Patents
A kind of recovery carries golden method in bronze charcoal Download PDFInfo
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- CN106498178A CN106498178A CN201610932107.9A CN201610932107A CN106498178A CN 106498178 A CN106498178 A CN 106498178A CN 201610932107 A CN201610932107 A CN 201610932107A CN 106498178 A CN106498178 A CN 106498178A
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- gold
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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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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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- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of reclaim the method for carrying gold in bronze charcoal, belong to gold industry and carry the method that bronze charcoal is processed.It is ashed in the range of 600～650 DEG C including carrying bronze charcoal；Remove impurity is carried out using nitric acid to charcoal ash, filtration washing obtains remove impurity slag；Leaching gold is carried out using chloroazotic acid method or villaumite method to remove impurity slag, makes gold enter liquid phase, filtration washing obtains gold leachate；Sodium sulfite is added in gold leachate, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；Cake of gold is equipped with 1%～5% Borax in 1250 DEG C of melting ingot castings.Advantage is：Technological process is simplified, labor intensity of operating staff is alleviated, working environment is optimized, the response rate for carrying bronze charcoal gold is improve.
Description
Technical field
The present invention relates to a kind of gold industry carries the method that bronze charcoal is processed, it is mainly used in and carries golden in bronze charcoal returning
Receive.
Background technology
The enterprise that extraction of gold process is starched using all sliming cyanidation charcoal, inevitably results from some load bronze charcoals aborning,
To these load bronze charcoals, conventional golden recovery method is to carry out local method ashing using home-built equipment, then adds lead oxide or silver enters
Row pyrogenic process collecting melting, then separates gold silver, chloroazotic acid leaching gold, reduction, ingot casting using nitric acid.This kind of method has a disadvantage that：
1. technological process is long, and operation is more, loses larger；
2. charcoal temperature when burning is difficult to control, and is usually present the phenomenon that charcoal is not ashed completely or sinters, causes gold recovery inclined
Low.
3. the powdered carbon after being ashed adopts pyrogenic attack, and labor intensity of operating staff is big, bad environments, easily causes the huge sum of money such as lead
Category poisoning, grievous injury operator are healthy.
Content of the invention
Present invention offer is a kind of to reclaim the method for carrying gold in bronze charcoal, superfluous to solve the existing flow process for carrying bronze charcoal recovery gold
Long complicated problem, the powdered carbon after ashing omit pyrometallurgical smelting step directly using wet recycling process, and light work personnel work
Intensity, improves working environment, improves the response rate of gold.
The present invention is adopted the technical scheme that：Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed in the range of 600～650 DEG C, makes load bronze charcoal ashization completely, without raw charcoal residual, without agglomerate
Generate, flue dust is collected, reduce and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 3～10:1, concentration of nitric acid 30～60%, 70～90 DEG C of reaction temperature,
Under conditions of 2～5h of response time charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using chloroazotic acid method or villaumite method to remove impurity slag, is made gold enter liquid phase, is separated with insoluble substance, cross diafiltration
Wash, obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO31.0～2.0 g/g of/Au consumptions, 70～90 DEG C of reaction temperature, reaction
Under conditions of 2～4 h of time, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 1%～5% Borax in 1250 DEG C of melting ingot castings.
Step of the present invention（3）Middle chloroazotic acid method is：
In liquid-solid ratio 4～10:1, chloroazotic acid/3～10 g/g of Au consumptions, 70～90 DEG C of reaction temperature, under conditions of 3～6h of time,
Leaching gold is carried out to remove impurity slag, and filtration washing obtains gold leachate.
Step of the present invention（3）Middle villaumite method is：
In liquid-solid ratio 4～8:1, NaClO30.4～1.0 g/g of/Au consumptions, NaCl 10～50g/l of consumption, HCl consumptions 80～
200g/l, 70～90 DEG C of reaction temperature, under conditions of 3～6h of time, carry out leaching gold to remove impurity slag, and filtration washing obtains leaching gold
Liquid.
The know-why of the present invention：
The present invention is will first to carry bronze charcoal to carry out accurate temperature controlling ashing in incinerator, then directly adopts wet treatment, first
With nitric acid to charcoal ash remove impurity, then using chloroazotic acid method or villaumite method leaching gold, reducing agent is reduced, ingot casting after cake of gold washing and drying.
By accurate temperature controlling, make burgy be ashed completely and not produce sintering, the gold in such charcoal ash is follow-up wet
Can leach during method PROCESS FOR TREATMENT more thoroughly, the carbon block that the charcoal remained without there is the gold for having leached adsorbs again or sinters
Middle gold leaching phenomenon not out.
Remove impurity process is carried out to burgy ash using nitric acid, the impurity such as Ag, Cu, Pb, Zn, Fe in gold mud is strong with its activity
The weak entrance liquid phase that successively reacts with nitric acid, and gold is not reacted with nitric acid and is stored in solid phase, through solid-liquid separation after, gold be able to
Impurity is separated.
During leaching gold, the gold in charcoal ash is with HAuCl4Form enters immersion, and its reaction equation is as follows：
2Au+3Cl2+2HCl=2HAuCl4
Reducing agent is made using sodium sulfite, the gold in leachate is reduced into cake of gold, its reaction equation is as follows：
2HAuCl4+3Na2SO3+3H2O=2Au+3Na2SO4+8HCl
The key technology of the present invention is to carry out accurate temperature controlling ashing to carrying bronze charcoal, burgy is ashed completely and is not produced burning
Knot, to meet wet processing processing requirement；Charcoal ash after ashing omit pyrometallurgical smelting step directly using wet recycling process
Suddenly, technological process is simplified.
It is an advantage of the current invention that：Technological process is simplified, labor intensity of operating staff is alleviated, building ring is optimized
Border, improves the response rate for carrying bronze charcoal gold.
Specific embodiment
Embodiment 1
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 600 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 3:1, concentration of nitric acid 30%, 70 DEG C of reaction temperature, response time 2h's
Under the conditions of charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using chloroazotic acid method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 4:1, chloroazotic acid/3 g/g of Au consumptions, 70 DEG C of reaction temperature, under conditions of time 3h, are soaked to remove impurity slag
Gold, filtration washing obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO31.0 g/g of/Au consumptions, 70 DEG C of reaction temperature, the bar of response time 2h
Under part, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 1% Borax in 1250 DEG C of melting ingot castings.
Embodiment 2
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 625 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 6.5:1, concentration of nitric acid 45%, 80 DEG C of reaction temperature, the response time
Under conditions of 3.5h charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using chloroazotic acid method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 7:1, chloroazotic acid/6.5 g/g of Au consumptions, 80 DEG C of reaction temperature, under conditions of time 4.5h, are carried out to remove impurity slag
Leaching gold, filtration washing obtain gold leachate;
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO31.5 g/g of/Au consumptions, 80 DEG C of reaction temperature, response time 3 h
Under the conditions of, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 3% Borax in 1250 DEG C of melting ingot castings.
Embodiment 3
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 650 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 10:1, concentration of nitric acid 60%, 90 DEG C of reaction temperature, response time 5h's
Under the conditions of charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using chloroazotic acid method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 10:1, chloroazotic acid/10 g/g of Au consumptions, 90 DEG C of reaction temperature, under conditions of time 6h, are soaked to remove impurity slag
Gold, filtration washing obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO32.0 g/g of/Au consumptions, 90 DEG C of reaction temperature, response time 4 h
Under the conditions of, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 5% Borax in 1250 DEG C of melting ingot castings.
Embodiment 4
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 600 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 3:1, concentration of nitric acid 30%, 70 DEG C of reaction temperature, response time 2h's
Under the conditions of charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using villaumite method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 4:1, NaClO30.4 g/g of/Au consumptions, NaCl consumption 10g/l, HCl consumption 80g/l, 70 DEG C of reaction temperature,
Under conditions of time 3h, leaching gold is carried out to remove impurity slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO31.0 g/g of/Au consumptions, 70 DEG C of reaction temperature, the bar of response time 2h
Under part, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 1% Borax in 1250 DEG C of melting ingot castings.
Embodiment 5
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 625 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 6.5:1, concentration of nitric acid 45%, 80 DEG C of reaction temperature, the response time
Under conditions of 3.5h charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using villaumite method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 6:1, NaClO30.7 g/g of/Au consumptions, NaCl consumption 30g/l, HCl consumption 140g/l, reaction temperature 80
DEG C, under conditions of time 4.5h, leaching gold is carried out to remove impurity slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO31.5 g/g of/Au consumptions, 80 DEG C of reaction temperature, response time 3 h
Under the conditions of, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 3% Borax in 1250 DEG C of melting ingot castings.
Embodiment 6
Comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed at 650 DEG C, makes load bronze charcoal ashization completely, is generated without raw charcoal residual, without agglomerate, to flue dust
It is collected, reduces and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 10:1, concentration of nitric acid 60%, 90 DEG C of reaction temperature, response time 5h's
Under the conditions of charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using villaumite method to remove impurity slag, makes gold enter liquid phase, specific as follows：
In liquid-solid ratio 8:1, NaClO31.0 g/g of/Au consumptions, NaCl consumption 50g/l, HCl consumption 200g/l, reaction temperature 90
DEG C, under conditions of time 6h, leaching gold is carried out to remove impurity slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO32.0 g/g of/Au consumptions, 90 DEG C of reaction temperature, response time 4 h
Under the conditions of, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 5% Borax in 1250 DEG C of melting ingot castings.
The present invention is further illustrated by experimental example below.
（1）Certain gold mine carries 650 DEG C of temperature of bronze charcoal control and is ashed, and charcoal ash essential element analysis result is shown in Table 1；
1 charcoal ash essential element analysis result of table
| Element | Au | Ag | Cu | Pb | Fe |
| Content（%） | 1.3896 | 6.3369 | 0.43 | 0.066 | 4.75 |
（2）In liquid-solid ratio 5:1, concentration of nitric acid 38%, 85 DEG C of reaction temperature are removed to charcoal ash under conditions of 3 h of response time
Miscellaneous, filtration washing obtains remove impurity slag；
（3）In liquid-solid ratio 6:1, NaClO30.5 g/g of/Au consumptions, 10 g/l of NaCl consumptions, HCl consumption 110g/l, reaction temperature
, under conditions of time 3h, leaching gold is carried out to remove impurity slag, the leaching rate of gold is 99.31% by 85 DEG C；Filtration washing, obtains gold leachate；
（4）In Na2SO31.25 g/g of/Au consumptions, 70 DEG C of reaction temperature, under conditions of 3 h of response time, are carried out to gold leachate
Reduction, the percent reduction of gold is 99.99%；Filtration washing cake of gold is simultaneously dried；
（5）Cake of gold is equipped with 1% Borax in 1250 DEG C of melting ingot castings, the ingot that purity is 99.98% is obtained.
Claims (3)
1. a kind of recovery carries golden method in bronze charcoal, it is characterised in that comprise the following steps：
（1）Carry bronze charcoal ash：
Control temperature is ashed in the range of 600～650 DEG C, makes load bronze charcoal ashization completely, without raw charcoal residual, without agglomerate
Generate, flue dust is collected, reduce and avoid charcoal ash to damage；
（2）Nitric acid remove impurity：
Remove impurity is carried out to charcoal ash using nitric acid, in liquid-solid ratio 3～10:1, concentration of nitric acid 30～60%, 70～90 DEG C of reaction temperature,
Under conditions of 2～5h of response time charcoal ash are carried out with remove impurity, filtration washing obtains remove impurity slag；
（3）Leaching gold：
Leaching gold is carried out using chloroazotic acid method or villaumite method to remove impurity slag, is made gold enter liquid phase, is separated with insoluble substance, cross diafiltration
Wash, obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in gold leachate, in Na2SO3When 1.0～2.0 g/g of/Au consumptions, 70～90 DEG C of reaction temperature, reaction
Between under conditions of 2～4 h, gold leachate is reduced, filtration washing cake of gold is simultaneously dried；
（5）Ingot casting
Cake of gold is equipped with 1%～5% Borax in 1250 DEG C of melting ingot castings.
2. a kind of recovery according to claim 1 carries golden method in bronze charcoal, it is characterised in that the step（3）In
Chloroazotic acid method is：
In liquid-solid ratio 4～10:1, chloroazotic acid/3～10 g/g of Au consumptions, 70～90 DEG C of reaction temperature, under conditions of 3～6h of time,
Leaching gold is carried out to remove impurity slag, and filtration washing obtains gold leachate.
3. a kind of recovery according to claim 1 carries golden method in bronze charcoal, it is characterised in that the step（3）In
Villaumite method is：
In liquid-solid ratio 4～8:1, NaClO30.4～1.0 g/g of/Au consumptions, NaCl 10～50g/l of consumption, HCl consumptions 80～
200g/l, 70～90 DEG C of reaction temperature, under conditions of 3～6h of time, carry out leaching gold to remove impurity slag, and filtration washing obtains leaching gold
Liquid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552007A (en) * | 2019-10-22 | 2019-12-10 | 贵州大学 | Efficient and environment-friendly method for deplating and extracting gold elements |
| WO2020157543A1 (en) * | 2019-01-31 | 2020-08-06 | Yvan Grac | Process for recovering non-ferrous precious metals by pelletisation and calcination of leaching activated carbon powder |
| CN114058864A (en) * | 2021-11-29 | 2022-02-18 | 昆山鸿福泰环保科技有限公司 | Method for recovering gold from gold-containing filter element |
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| US20030039605A1 (en) * | 2001-08-21 | 2003-02-27 | Edward Ramsay | Process for the recovery of precious metals from fine carbon |
| CN102409176A (en) * | 2011-11-10 | 2012-04-11 | 山东国大黄金股份有限公司 | Comprehensive treatment process of waste gold-bearing activated carbon |
| CN104357664A (en) * | 2014-11-17 | 2015-02-18 | 芒市海华开发有限公司 | Method for recovering gold and silver from waste gold/silver-containing activated carbon |
| CN104928487A (en) * | 2015-06-06 | 2015-09-23 | 长春黄金研究院 | Processing method of powdered carbon in extraction of gold by CIP (carbon-in-pulp) process |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030039605A1 (en) * | 2001-08-21 | 2003-02-27 | Edward Ramsay | Process for the recovery of precious metals from fine carbon |
| CN102409176A (en) * | 2011-11-10 | 2012-04-11 | 山东国大黄金股份有限公司 | Comprehensive treatment process of waste gold-bearing activated carbon |
| CN104357664A (en) * | 2014-11-17 | 2015-02-18 | 芒市海华开发有限公司 | Method for recovering gold and silver from waste gold/silver-containing activated carbon |
| CN104928487A (en) * | 2015-06-06 | 2015-09-23 | 长春黄金研究院 | Processing method of powdered carbon in extraction of gold by CIP (carbon-in-pulp) process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020157543A1 (en) * | 2019-01-31 | 2020-08-06 | Yvan Grac | Process for recovering non-ferrous precious metals by pelletisation and calcination of leaching activated carbon powder |
| AU2019426739B2 (en) * | 2019-01-31 | 2021-08-12 | Yvan Grac | Process for recovering non-ferrous precious metals by pelletisation and calcination of leaching activated carbon powder |
| CN110552007A (en) * | 2019-10-22 | 2019-12-10 | 贵州大学 | Efficient and environment-friendly method for deplating and extracting gold elements |
| CN114058864A (en) * | 2021-11-29 | 2022-02-18 | 昆山鸿福泰环保科技有限公司 | Method for recovering gold from gold-containing filter element |
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Address after: 130000 Chaoyang District nanhu road, Jilin, China, No. 6760, No. Applicant after: Changchun Gold Research Institute Co., Ltd. Address before: 130000 Chaoyang District nanhu road, Jilin, China, No. 6760, No. Applicant before: Changchun Gold Research Institute |
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