CN106498178B - A kind of recycle carries method golden in bronze charcoal - Google Patents
A kind of recycle carries method golden in bronze charcoal Download PDFInfo
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- CN106498178B CN106498178B CN201610932107.9A CN201610932107A CN106498178B CN 106498178 B CN106498178 B CN 106498178B CN 201610932107 A CN201610932107 A CN 201610932107A CN 106498178 B CN106498178 B CN 106498178B
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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
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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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- Environmental & Geological Engineering (AREA)
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Abstract
The present invention relates to a kind of recycle to carry method golden in bronze charcoal, belongs to the method that gold industry carries the processing of bronze charcoal.It is ashed in the range of 600~650 DEG C including carrying bronze charcoal；It is cleaned using nitric acid to charcoal ash, filtration washing obtains removal of impurities slag；Leaching gold is carried out to removal of impurities slag using chloroazotic acid method or villaumite method, gold is made to enter liquid phase, filtration washing obtains gold leachate；Sodium sulfite is added in into gold leachate, gold leachate is restored, 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, alleviates labor intensity of operating staff, optimizes working environment, improves the rate of recovery for carrying bronze charcoal gold.
Description
Technical field
The present invention relates to a kind of methods that gold industry carries the processing of bronze charcoal, are mainly used in and carry golden in bronze charcoal return
It receives.
Background technology
Using the enterprise of all sliming cyanidation charcoal slurry extraction of gold process, some are inevitably resulted from production and carries bronze charcoal,
To these load bronze charcoal, it is common gold recovery method be using home-built equipment carry out local method ashing, then add lead oxide or silver into
Then row pyrogenic process collecting melting detaches gold and silver, chloroazotic acid leaching gold, reduction, ingot casting using nitric acid.This kind of method has a disadvantage that：
1. technological process is long, process is more, and loss is larger；
2. charcoal temperature when burning is difficult to control, the phenomenon that charcoal is not ashed or is sintered completely is usually present, causes golden recycling
Rate is relatively low.
3. for the powdered carbon after ashing using pyrogenic attack, labor intensity of operating staff is big, bad environments, easily causes the huge sum of money such as lead
Belong to poisoning, grievous injury operating personnel's health.
Invention content
The present invention provides a kind of recycle and carries method golden in bronze charcoal, superfluous to solve the flow of existing load bronze charcoal recycling gold
The problem of long complicated, the powdered carbon after ashing omit pyrometallurgical smelting step, light work personnel labour directly using wet recycling process
Intensity improves working environment, improves the rate of recovery of gold.
The technical solution adopted by the present invention is that：Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed in the range of 600~650 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal remains, without burning
Caking generation, is collected flue dust, reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 3~10:1, concentration of nitric acid 30~60%, reaction temperature 70~90
DEG C, it cleans under conditions of 2~5h of reaction time to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using chloroazotic acid method or villaumite method, gold is made to enter liquid phase, is detached with insoluble substance, is filtered
Washing, obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO3It is 1.0~2.0 g/g of/Au dosages, 70~90 DEG C of reaction temperature, anti-
Between seasonable under conditions of 2~4 h, gold leachate is restored, 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 dosages, 70~90 DEG C of reaction temperature, the condition of 3~6h of time
Under, leaching gold is carried out to removal of impurities slag, filtration washing obtains gold leachate.
Step of the present invention（3）Middle villaumite method is：
In liquid-solid ratio 4~8:1, NaClO3/ Au dosages 0.4~1.0 g/g, NaCl dosages 10~50g/l, HCl dosage 80
~200g/l, 70~90 DEG C of reaction temperature under conditions of 3~6h of time, carry out leaching gold, filtration washing is soaked to removal of impurities slag
Golden liquid.
The technical principle 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 uses wet-treating,
It is cleaned first with nitric acid to charcoal ash, gold is then soaked using chloroazotic acid method or villaumite method, reducing agent restores, and is cast after cake of gold washing and drying
Ingot.
By accurate temperature controlling, make burgy that can be ashed completely and do not generate sintering, the gold in such charcoal ash is subsequent wet
It can be leached during method process more thoroughly, the carbon block that the gold without occurring to have leached is adsorbed or is sintered again by remaining charcoal
The phenomenon that middle gold leaching does not come out.
Removal of impurities processing is carried out to burgy ash using nitric acid, and the impurity such as Ag, Cu, Pb, Zn, Fe in gold mud are strong with its activity
It is weak successively to react into liquid phase with nitric acid, and gold is not reacted with nitric acid and is stored in solid phase, after separation of solid and liquid, gold be able to and
Impurity detaches.
During leaching gold, the gold in charcoal ash is with HAuCl4Form enters immersion liquid, and 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, 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, makes burgy that can be ashed completely and does not produce
Raw burn knot, to meet wet processing processing requirement；Charcoal ash after ashing omit pyrometallurgical smelting directly using wet recycling process
Step simplifies technological process.
The advantage of the invention is that：Technological process is simplified, alleviates labor intensity of operating staff, optimizes building ring
Border improves the rate of recovery for carrying bronze charcoal gold.
Specific embodiment
Embodiment 1
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 600 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 3:1, concentration of nitric acid 30%, 70 DEG C of reaction temperature, the reaction time
It cleans under conditions of 2h to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using chloroazotic acid method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 4:1, chloroazotic acid/3 g/g of Au dosages, 70 DEG C of reaction temperature under conditions of time 3h, carries out removal of impurities slag
Leaching gold, filtration washing obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO31.0 g/g of/Au dosages, 70 DEG C of reaction temperature, reaction time 2h
Under conditions of, gold leachate is restored, 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
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 625 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 6.5:1, concentration of nitric acid 45%, 80 DEG C of reaction temperature, during reaction
Between clean to charcoal ash under conditions of 3.5h, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using chloroazotic acid method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 7:1, chloroazotic acid/6.5 g/g of Au dosages, 80 DEG C of reaction temperature, under conditions of time 4.5h, to the slag that cleans
Leaching gold is carried out, filtration washing obtains gold leachate;
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO31.5 g/g of/Au dosages, 80 DEG C of reaction temperature, 3 h of reaction time
Under conditions of, gold leachate is restored, 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
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 650 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 10:1, concentration of nitric acid 60%, 90 DEG C of reaction temperature, the reaction time
It cleans under conditions of 5h to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using chloroazotic acid method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 10:1, chloroazotic acid/10 g/g of Au dosages, 90 DEG C of reaction temperature, under conditions of time 6h, to removal of impurities slag into
Row leaching gold, filtration washing obtain gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO32.0 g/g of/Au dosages, 90 DEG C of reaction temperature, 4 h of reaction time
Under conditions of, gold leachate is restored, 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
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 600 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 3:1, concentration of nitric acid 30%, 70 DEG C of reaction temperature, the reaction time
It cleans under conditions of 2h to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using villaumite method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 4:1, NaClO30.4 g/g of/Au dosages, NaCl dosages 10g/l, HCl dosage 80g/l, reaction temperature
70 DEG C, under conditions of time 3h, leaching gold is carried out to removal of impurities slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO31.0 g/g of/Au dosages, 70 DEG C of reaction temperature, reaction time 2h
Under conditions of, gold leachate is restored, 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
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 625 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 6.5:1, concentration of nitric acid 45%, 80 DEG C of reaction temperature, during reaction
Between clean to charcoal ash under conditions of 3.5h, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using villaumite method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 6:1, NaClO30.7 g/g of/Au dosages, NaCl dosages 30g/l, HCl dosage 140g/l, reaction temperature
80 DEG C, under conditions of time 4.5h, leaching gold is carried out to removal of impurities slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO31.5 g/g of/Au dosages, 80 DEG C of reaction temperature, 3 h of reaction time
Under conditions of, gold leachate is restored, 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
Include the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed at 650 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal residual is generated without agglomerate, right
Flue dust is collected, and reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 10:1, concentration of nitric acid 60%, 90 DEG C of reaction temperature, the reaction time
It cleans under conditions of 5h to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using villaumite method, gold is made to enter liquid phase, it is specific as follows：
In liquid-solid ratio 8:1, NaClO31.0 g/g of/Au dosages, NaCl dosages 50g/l, HCl dosage 200g/l, reaction temperature
90 DEG C, under conditions of time 6h, leaching gold is carried out to removal of impurities slag, filtration washing obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO32.0 g/g of/Au dosages, 90 DEG C of reaction temperature, 4 h of reaction time
Under conditions of, gold leachate is restored, 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.
It is further illustrated the present invention below by experimental example.
（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 carries out charcoal ash under conditions of 3 h of reaction time
Removal of impurities, filtration washing obtain removal of impurities slag；
（3）In liquid-solid ratio 6:1, NaClO30.5 g/g of/Au dosages, NaCl dosages 10 g/l, HCl dosage 110g/l, reaction
85 DEG C of temperature under conditions of time 3h, carries out removal of impurities slag leaching gold, and golden leaching rate is 99.31%；Filtration washing obtains leaching gold
Liquid；
（4）In Na2SO31.25 g/g of/Au dosages, 70 DEG C of reaction temperature, under conditions of 3 h of reaction time, to gold leachate into
Row reduction, golden reduction rate are 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, obtains the ingot that purity is 99.98%.
Claims (3)
1. a kind of recycle carries method golden in bronze charcoal, which is characterized in that includes the following steps：
（1）Carry the ashing of bronze charcoal：
Control temperature is ashed in the range of 600~650 DEG C, makes the ashing of load bronze charcoal complete, and no raw charcoal remains, without agglomerate
Generation, is collected flue dust, reduces and charcoal ash is avoided to damage；
（2）Nitric acid cleans：
It is cleaned using nitric acid to charcoal ash, in liquid-solid ratio 3~10:1, concentration of nitric acid 30~60%, 70~90 DEG C of reaction temperature,
It cleans under conditions of 2~5h of reaction time to charcoal ash, filtration washing obtains removal of impurities slag；
（3）Leaching gold：
Leaching gold is carried out to removal of impurities slag using chloroazotic acid method or villaumite method, gold is made to enter liquid phase, is detached with insoluble substance, crosses diafiltration
It washs, obtains gold leachate；
（4）Reduction：
Sodium sulfite is added in into gold leachate, in Na2SO3When 1.0~2.0 g/g of/Au dosages, 70~90 DEG C of reaction temperature, reaction
Between under conditions of 2~4 h, gold leachate is restored, 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 recycle according to claim 1 carries method golden in bronze charcoal, which is characterized 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 dosages, 70~90 DEG C of reaction temperature, under conditions of 3~6h of time,
Leaching gold is carried out to removal of impurities slag, filtration washing obtains gold leachate.
3. a kind of recycle according to claim 1 carries method golden in bronze charcoal, which is characterized in that the step（3）In
Villaumite method is：
In liquid-solid ratio 4~8:1, NaClO3/ Au dosages 0.4~1.0 g/g, NaCl dosages 10~50g/l, HCl dosage 80~
200g/l, 70~90 DEG C of reaction temperature under conditions of 3~6h of time, carry out removal of impurities slag leaching gold, and filtration washing obtains leaching gold
Liquid.
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| CA3111658C (en) * | 2019-01-31 | 2021-11-02 | 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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| CA2355491A1 (en) * | 2001-08-21 | 2003-02-21 | Edward Ramsay | Process for the recovery of precious metals from fine carbon |
| CN102409176B (en) * | 2011-11-10 | 2013-04-17 | 山东国大黄金股份有限公司 | Comprehensive treatment process of waste gold-bearing activated carbon |
| CN104357664B (en) * | 2014-11-17 | 2017-02-22 | 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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