CN104946902A - Method for balancing cyanide in all-sliming cyanided carbon slurry gold extraction process - Google Patents
Method for balancing cyanide in all-sliming cyanided carbon slurry gold extraction process Download PDFInfo
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- CN104946902A CN104946902A CN201510357786.7A CN201510357786A CN104946902A CN 104946902 A CN104946902 A CN 104946902A CN 201510357786 A CN201510357786 A CN 201510357786A CN 104946902 A CN104946902 A CN 104946902A
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- China
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- prussiate
- amount
- cyanide
- balance
- production process
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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
Abstract
The invention discloses a method for balancing cyanide in an all-sliming cyanided carbon slurry gold extraction process. Dynamic balance with water and material balance as a foundation is adopted, and the balance refers to balance among the input amount, cyanide amount which has conversion losses such as decomposition, oxidization and sediment in the production process and comprises the amount of thiocyanide, cyanate, ammonia nitrogen and the like converted into a liquid phase and a solid phase, outwards-discharged contaminants such as cyanide leaching residue or the total amount of cyanide in other gaseous states or liquid and the cyanide amount which is treated, damaged and not recycled in the production process. The adsorption concentration effect of small granularity solid minerals and activated carbon on the cyanide is considered, meanwhile, the cyanide conversion direction and the system memory in the production process are considered, and the cyanide pollution path and the repeated utilization amount are cleared.
Description
Technical field
The present invention relates to the method for prussiate balance in a kind of all sliming cyanidation charcoal slurry gold extraction technology, particularly a kind of balance of the poisonous material prussiate of carbon slurry process in gold industry.
Background technology
The cyaniding technology of extracting gold from is modern main pan technique, all sliming cyanidation charcoal slurry gold extraction technology due to its flow process short, equipment is few, invests little, and containing the reuse of cyanogen lean solution, production cost is low, is widely used at gold industry.Prussiate has severe toxicity, all sliming cyanidation charcoal slurry gold extraction technology in prussiate balance to optimization leaching condition, reduce reagent consumption, distinct cyanide pollution approach and minimizing all very necessary.Prussiate balance is applied to all many-sides such as the optimization of enterprise working condition, the environmental impact assessment of construction project and examination, level of clean production evaluation and examination, environmental protection be emergent.
Prussiate has and a small amount of hydrolysis in all sliming cyanidation charcoal slurry gold extraction technology, and the prussic acid of formation has the volatilization of minute quantity at a high ph, and other hydrolysate forms ammonia react equation and is:
CN
-+H
2O→HCN+OH
-
CN
-+H
2O→NH
3+HCO3
-
CN
-+3H
2O→NH
3+CO
2+HO
-
In all sliming cyanidation charcoal slurry gold extraction technology, prussiate is because of under the existence of gac and pneumatic blending aerobic condition, catalyzed oxidation generation cyanate:
CN
-+2OH
-→CNO
-+H
2O
2CN
-+O
2+H
2O→2CNO
-
The product of said process is hydrolyzed at leisure by water, the urea of ammonium salt and part:
2CNO
-+2H
2O→NH
4 +++HCO3
-
CNO
-+NH
4 +→CO(NH
2)
2
Generation thiocyanate-can be combined by sulfide in mineral under prussiate alkaline condition in all sliming cyanidation charcoal slurry gold extraction technology; Also have part prussiate to form precipitation with the form of iron cyanogen in addition, in addition prussiate also can consume with other forms.
Cyaniding process proposition gold loaded carbon is taken away prussiate and become ammonia, nitrogen etc. by decomposed in gold loaded carbon desorption electrolytic process:
Cathodic reaction: Au (CN)
2 -+ e-→ Au+2CN
-
Ag(CN)
2 －+e—→Ag+2CN
－
2H
2O+2e—→H
2+2OH
－
Anodic reaction: 4OH
--4e-→ O
2+ 2H
2o
CN
－+2OH
――2e—→CNO
－+H
2O
2CNO
－+4OH
－－6e—→2CO
2+N
2+2H
2O
Solution reaction: 2CN
-+ O
2+ 4H
2o-→ 2NH
3+ 2HCO
3 -
OH
－+H
+—→H
2O
HCO
3 －+OH
－—→H
2O+CO
3 2－
The prussiate that desorbing electrolytic gold mud is carried secretly destroys when acid is invaded or pyrometallurgical smelting smelts, and destroys when after desorb, in charcoal (poor charcoal), prussiate continues pickling after entering.
Traditional prussiate balance only calculates with liquid phase prussiate (total cyanogen) concentration and pulp density, have ignored the adsorption and enrichment effect to prussiate of fine particle size solid phase mineral and gac, do not focus on the recycling that production process prussiate is converted into the whereabouts of ammonia nitrogen, sulphur cyanogen, cyanate etc., Installed System Memory amount, prussiate.
Summary of the invention
The object of this invention is to provide the method for prussiate balance in a kind of all sliming cyanidation charcoal slurry gold extraction technology.
The method is that in all sliming cyanidation charcoal slurry gold extraction technology based on water and material balance, prussiate balance is a kind of running balance; This balance is the prussiate amount of loss of being broken down and oxidized in input amount and production process, precipitating, outer pollution discharging thing is as cyanogen slag or with the total cyanide in other gaseous states or liquid, production process process destroys and balance between the prussiate amount do not reclaimed, embodies the prussiate amount of the recyclings such as the storage of prussiate in each facility of production process and production process recycling simultaneously; All sliming cyanidation charcoal slurry gold extraction technology is taken away without cyaniding;
In all sliming cyanidation charcoal slurry gold extraction technology, the balance of prussiate (in total cyanogen) meets following material balance formula:
∑ G discharge=∑ G input-∑ G process destruction-∑ G transforms consumption
Wherein: ∑ G discharges---outer pollution discharging thing is as cyanogen slag or with the total cyanide t/a in other gaseous states or liquid
∑ G drops into---all interpolation prussiates of production process (containing cyaniding and gold loaded carbon desorption process) add summation t/a
∑ G process destroys---and production process process destroys and the prussiate amount t/a do not reclaimed
∑ G transforms consumption---and production process is converted into sulphur cyanogen, ammonia nitrogen, cyanate and other amount t/a containing cyaniding and gold loaded carbon process prussiate
The prussiate amount be broken down and oxidized in described production process, precipitated comprises and is converted into sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen, other amount.Prussiate is converted into other amount by releasing to be converted into the change of sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen and process prussiate; The prussiate amount that in solid phase, sulphur cyanogen, cyanate, ammonia nitrogen, prussiate and above-mentioned cyanogen slag, gold mud are taken out of, gac contain the amount of prussiate in gold loaded carbon, poor charcoal all in wet feed, and not washing and drying, with actual response material adsorption and enrichment effect; In gac, gold mud, wet solid phase, sulphur cyanogen, ammonia nitrogen, prussiate detect with reference to method in soil, and cyanate detects the method with reference to malicious leaching standard annex F.
Present method is equally applicable to resin Cyanide Process, only needs that gac is replaced with resin and measures accordingly, and moisture meter not washing and drying, detection method etc. is all identical.
Concrete steps of the present invention:
Confirm ore grinding, densely to size mixing, leach, soak suction, each equipment of each system of press filtration deposits ore pulp amount and prussiate (total cyanogen meter) concentration, calculate the storage of prussiate in each facility accordingly and add up each system retention amount; Confirm that full process system is containing cyaniding and desorption process prussiate input amount; The amount of prussiate in the final pollutent discharged in confirmation system again; By ore grinding, densely to size mixing, leach, soak suction, desorb, the turnover of smelting each operation containing in cyanogen material by wet solid phase, all the other liquid phases respectively examine cyanide be converted into the amount of sulphur cyanogen, ammonia nitrogen, cyanate, pay close attention to prussiate (total cyanogen) change simultaneously, release the amount being converted into other and comprise prussiate volatile quantity, thus calculate each operation prussiate conversion loss amount; Confirm retrieval system prussiate reuse amount and recovery of cyanide amount and reentry point position, statistics prussiate recycling amount; All sliming cyanidation charcoal slurry gold extraction technology prussiate state diagram is gone out according to material trend and above-mentioned Plotting data.
Beneficial effect of the present invention:
Do not calculate with liquid phase prussiate (total cyanogen) concentration and pulp density, concern fine particle size solid phase mineral and gac are to the adsorption and enrichment effect of prussiate, focus on the whereabouts that production process prussiate is converted into ammonia nitrogen, sulphur cyanogen, cyanate etc. simultaneously, Installed System Memory amount, the recycling of prussiate.To optimization production condition, reduce reagent consumption, distinct cyanide pollution approach and minimizing, environmental emergency are all very necessary.
Embodiment
The present invention first by confirming ore grinding, densely to size mixing, leach, soak suction, each equipment of each system of press filtration deposits ore pulp amount and prussiate (ore pulp directly surveys total cyanogen meter) concentration, calculates the storage of prussiate in each system.Secondly full technique adds quality and the concentration of prussiate containing cyaniding and desorption process, converts out total system prussiate input amount (in CN quality); Reaffirm that the final pollutent discharged in system is as the amount of prussiate in cyanogen slag, waste water, waste gas, do not comprise the amount of prussiate volatilization, between all sliming cyanidation charcoal slurry gold extraction technology cyaniding process pH value 11-12, under high alkalinity, volatile quantity is very little, the leaching of oxygenation strong mixing, leaching bothrium are carried out and added a cover, volatile quantity can be ignored, and this part gauge enters to transform in loss amount not as quantity discharged; Again by ore grinding, densely to size mixing, leach, soak suction, desorb, the turnover of smelting each operation containing in cyanogen material by wet solid phase, all the other liquid phases respectively examine cyanide be converted into the amount of sulphur cyanogen, ammonia nitrogen, cyanate, pay close attention to prussiate (total cyanogen) change simultaneously, release the amount being converted into other and comprise prussiate volatile quantity, thus confirm that each operation prussiate transforms loss amount; Reaffirm that retrieval system lean solution amount and concentration of cyanide calculate prussiate reuse amount and recovery of cyanide amount and reentry point position, calculate the recycling amount of prussiate; Last foundation material trend and above-mentioned Plotting data go out all sliming cyanidation charcoal slurry gold extraction technology prussiate state diagram.Wherein: to be included in from the prussiate amount that cyanidation system is taken out of with gold loaded carbon that electrolytic process transforms loss, desorbing electrolytic gold mud brings smelting into, acid invade or pyrometallurgical smelting time destroy, to return cyaniding and amount that after remaining in desorb, in charcoal (poor charcoal), prussiate is destroyed when poor charcoal pickling with decomposition of effluent.
Be broken down and oxidized in production process, prussiate amount that precipitation etc. transforms comprises and be converted into sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen, other amount.Prussiate is converted into other amount by releasing to be converted into the change of sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen and process prussiate.The prussiate amount that in solid phase, sulphur cyanogen, cyanate, ammonia nitrogen, prussiate and above-mentioned cyanogen slag, gold mud are taken out of, gac contain the amount of prussiate in gold loaded carbon, poor charcoal all in wet feed, and not washing and drying, with actual response material adsorption and enrichment effect.In gac, gold mud, wet solid phase, sulphur cyanogen, ammonia nitrogen, prussiate detect with reference to method in soil, and the detection of cyanate is with reference to the method for malicious leaching standard annex F.
Claims (2)
1. the method that in all sliming cyanidation charcoal slurry gold extraction technology, prussiate balances, the method is the running balance based on water and material balance; This balance is the prussiate amount being broken down and oxidized, precipitating in input amount and production process, outer pollution discharging thing is as cyanogen slag or with the total cyanide in other gaseous states or liquid, production process process destroys and balance between the prussiate amount do not reclaimed, embodies the prussiate amount of the recyclings such as the storage of prussiate in each facility of production process and production process recycling simultaneously; All sliming cyanidation charcoal slurry gold extraction technology is taken away without cyaniding;
In all sliming cyanidation charcoal slurry gold extraction technology, the balance of prussiate meets following material balance formula:
∑ G discharge=∑ G input-∑ G process destruction-∑ G transforms consumption
Wherein: ∑ G discharges---outer pollution discharging thing is as cyanogen slag or with the total cyanide t/a in other gaseous states or liquid
∑ G drops into---all interpolation prussiates of production process (containing cyaniding and gold loaded carbon desorption process) add summation t/a
∑ G process destroys---and production process process destroys and the prussiate amount t/a do not reclaimed
∑ G transforms consumption---and production process is converted into sulphur cyanogen, ammonia nitrogen, cyanate and other amount t/a containing cyaniding and gold loaded carbon process prussiate.
2. the method for prussiate balance in a kind of all sliming cyanidation charcoal slurry gold extraction technology according to claim 1, is characterized in that: the prussiate amount be broken down and oxidized in described production process, precipitated comprises and is converted into sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen, other amount; Described prussiate is converted into other amount by releasing to be converted into the change of sulphur cyanogen in liquid phase and solid phase, cyanate, ammonia nitrogen and process prussiate; The prussiate amount that in solid phase, sulphur cyanogen, cyanate, ammonia nitrogen, prussiate and above-mentioned cyanogen slag, gold mud are taken out of, gac contain the amount of prussiate in gold loaded carbon, poor charcoal all in wet feed, and not washing and drying, with actual response material adsorption and enrichment effect; In gac, gold mud, wet solid phase, sulphur cyanogen, ammonia nitrogen, prussiate detect with reference to method in soil, and cyanate detects the method with reference to malicious leaching standard annex F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510357786.7A CN104946902A (en) | 2015-06-25 | 2015-06-25 | Method for balancing cyanide in all-sliming cyanided carbon slurry gold extraction process |
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|---|---|---|---|
| CN201510357786.7A CN104946902A (en) | 2015-06-25 | 2015-06-25 | Method for balancing cyanide in all-sliming cyanided carbon slurry gold extraction process |
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| CN104946902A true CN104946902A (en) | 2015-09-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332655A (en) * | 2021-06-09 | 2021-09-03 | 浙江红狮环保股份有限公司 | Method for pre-decomposing cyanide outside cement kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042947A (en) * | 1988-12-01 | 1990-06-13 | 西安有色金属研究所 | From low-grade gold, reclaim the processing method of gold |
| CN1254026A (en) * | 1999-10-04 | 2000-05-24 | 郑晓廷 | All-mud zinc cyanid powder substitution and carbon pulp adsorption seires-connection gold-extracting method |
| CN101392326A (en) * | 2008-11-06 | 2009-03-25 | 昆明理工大学 | Method for recovering gold from all-sliming cyanidation gold extraction slag |
| CN101451191A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Fast gold-leaching process by CIP process |
| CN103397197A (en) * | 2013-07-26 | 2013-11-20 | 孙光潮 | Method for extracting gold from gold-containing noble liquid cyanide solution |
-
2015
- 2015-06-25 CN CN201510357786.7A patent/CN104946902A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042947A (en) * | 1988-12-01 | 1990-06-13 | 西安有色金属研究所 | From low-grade gold, reclaim the processing method of gold |
| CN1254026A (en) * | 1999-10-04 | 2000-05-24 | 郑晓廷 | All-mud zinc cyanid powder substitution and carbon pulp adsorption seires-connection gold-extracting method |
| CN101451191A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Fast gold-leaching process by CIP process |
| CN101392326A (en) * | 2008-11-06 | 2009-03-25 | 昆明理工大学 | Method for recovering gold from all-sliming cyanidation gold extraction slag |
| CN103397197A (en) * | 2013-07-26 | 2013-11-20 | 孙光潮 | Method for extracting gold from gold-containing noble liquid cyanide solution |
Non-Patent Citations (3)
| Title |
|---|
| 任天忠: "氰化工艺中氰化物消耗分析", 《云南冶金》 * |
| 杨基和: "《化工工程设计概论》", 30 August 2012 * |
| 黄礼煌: "《金银提取技术》", 31 December 1995 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332655A (en) * | 2021-06-09 | 2021-09-03 | 浙江红狮环保股份有限公司 | Method for pre-decomposing cyanide outside cement kiln |
| CN113332655B (en) * | 2021-06-09 | 2022-02-22 | 浙江红狮环保股份有限公司 | Method for pre-decomposing cyanide outside cement kiln |
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Application publication date: 20150930 |