CN105886780A - Agent for non-cyanide efficient leaching of gold in gold-bearing material - Google Patents
Agent for non-cyanide efficient leaching of gold in gold-bearing material Download PDFInfo
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- CN105886780A CN105886780A CN201610476122.7A CN201610476122A CN105886780A CN 105886780 A CN105886780 A CN 105886780A CN 201610476122 A CN201610476122 A CN 201610476122A CN 105886780 A CN105886780 A CN 105886780A
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- gold
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- medicament
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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
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
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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
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
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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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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
The invention discloses an agent for non-cyanide efficient leaching of gold in gold-bearing material, the agent that is an aqueous solution, comprising: a complex gold dissolver (5-20%) and an oxidant (5-15%). This agent can dissolve a gold plating layer from material within 30 seconds at a room temperature of 90 DEG C, and gold concentration in the solution after gold dissolving is up to 1-10 g/L. The agent has low toxicity and good environment-friendliness. A production process of this agent is simple to perform, production cost is low, and the agent is suitable for large-scale batch production. A leaching method of this agent uses a stable system, leaching speed is high, leaching effect is good, and consumption of the agent is low.
Description
Technical field
The present invention relates to the medicament production of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen, using method.It is applicable to the recycling containing gold electron wastes, craft of gilding product etc..
Technical background
Electron wastes is as the important component part of electric equipment products typically by metal with nonmetal form, and wherein metal includes ferromagnet, base metal and noble metal etc., and the metal quality mark in circuit board is about 45%.Electron wastes itself is the solid refuse of a kind of highly dangerous, it contains the multiple poisonous and harmful substances such as Pb, Cd, Hg, Cr6+, polrvinyl chloride and halogenated fire-retardants, simultaneously again rich in having the common metals such as Cu, Al, Au, Ag, Pd, Pt and noble metal in printed circuit board (PCB), there is great resource value, the noble metal such as gold silver the most therein.
Carry from circuit board gold and carry from Ore gold process there is certain similarity, main method has cyaniding, thiosulfate technique, lime sulfur method, thiourea method, halogen method etc..Various methods all have respective pluses and minuses: cyaniding leaching rate is high, technical maturity, but it has hypertoxicity, and environmental pollution is serious；Review on thiosulfate leaching goes out that speed is fast, medicament is nontoxic, but its consumption is big, leaches cost high；Lime sulfur method has nontoxic, inexpensive, but its leaching rate is the highest；It is high that Thiourea leaching goes out rate, but needs to leach in sour environment, and thiourea is a kind of potential carcinogen simultaneously；Halogen method gold-leaching technology flow process is more complicated, and investment is big, it is not easy to popularization and application, equally exists environmental issue.
In sum, present stage extracts gold utensil in electron wastes real urgency, and existing medicament and technique have various deficiency, and need a kind of novel environment friendly economy carries gold medicament.
Summary of the invention
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen of the present invention, toxicity is relatively low, environmental friendliness；Its leaching body system is stable, and leaching velocity is fast, and leaching effect is good, and dosing is few；Production technology is simple to operation, and production cost is low, can scale batch production.
Technical solution of the present invention is as follows:
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen, it is characterised in that described medicament is made up of complexation molten gold agent and oxidant, the mass ratio of complexation molten gold agent and oxidant is 5 ~ 20:5 ~ 15；The preparation method of described complexation molten gold agent is:
(1) by carbamide, sodium hydroxide (potassium), sodium carbonate (potassium), sodium thiosulfate (potassium), sodium bromide (potassium) (3 ~ 5) in molar ratio: (2 ~ 4): (2 ~ 4): (1 ~ 2): (0.5 ~ 1) mix homogeneously；
(2) raw material that step (1) mixes is put in reactor, add ferronickel catalyst, catalyst amount is the 1 ~ 2% of chelating agent raw materials for production weight, and under the conditions of 450 ~ 900 DEG C, anaerobic or anoxia reacting by heating 15 ~ 90min are prepared under catalyst action.
Described oxidant is the mixture of one or more in m-nitrobenzene sodium sulfonate, sodium peroxydisulfate and hydrogen peroxide.
Preferably, the mass ratio of described complexation molten gold agent and oxidant is 8 ~ 12:6 ~ 10.
Preferably, the catalyst described in the preparation method step (2) of network complexation molten gold agent is ferronickel catalyst.
Preferably, the material molar ratio described in preparation method step (1) of complexation molten gold agent is, carbamide: sodium hydroxide (potassium): sodium carbonate (potassium): sodium thiosulfate (potassium): sodium bromide (potassium)=4:3:3:2:0.5.
Preferably, the reaction temperature described in preparation method step (2) of complexation molten gold agent is 600 ~ 750 DEG C.
Preferably, the response time described in preparation method step (2) of complexation molten gold agent is 15 ~ 45min；Described reaction environment is oxygen free condition.
The using method of the medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen, it is characterised in that
(1) aqueous solution of the medicament described in configuration, in solution, complexation molten gold agent mass concentration is 5 ~ 20%, and oxidant mass concentration is 5 ~ 15%；
(2) adjusting pH value of solution is 9 ~ 14, and heating-up temperature 20 ~ 90 DEG C adds gold-bearing material to be extracted.
Preferably, the complexation molten gold agent concentration described in step (1) is 8 ~ 12%, and oxidant concentration is 6 ~ 10%；PH value of solution described in step (2) is 11；Heating-up temperature described in step (2) is 50 ~ 60 DEG C.
The medicament of gold adds containing gold electronic waste or other gold-plated article in obtaining the efficient molten leaching gold-bearing material of a kind of non-cyanogen, under the conditions of 50 ~ 60 DEG C, gold can complete to dissolve in 30s, take out the waste material after molten gold, add new gold-bearing material, until molten gold reagent consumption is clean, now the concentration of gold can reach 1 ~ 10g/L.Obtain gold-containing solution and obtain Aurum metallicum by methods such as electrolysis, zinc powder reductions.
The invention have the benefit that
Medicament of the present invention, uses dosing of the present invention tradition dosing than ever to reduce more than 20%, and medicament stock is common chemical industry medicament, low price, and cost relatively traditional method reduces by more than 20%.Treatment effeciency relatively previous methods improves more than 50%, within the single treatment time can be reduced to 30s.
Toxicity is relatively low, environmental friendliness；Its leaching body system is stable, and leaching velocity is fast, and leaching effect is good, and dosing is few；Production technology is simple to operation, and production cost is low, can scale batch production.
Specific implementation method
Embodiment
1
The preparation of complexation molten gold agent:
By medicament according to following ratio (mol ratio) mix homogeneously: carbamide: sodium hydroxide (potassium): sodium carbonate (potassium): sodium thiosulfate (potassium): sodium bromide (potassium)=4:3:3:2:0.5.Putting in reactor by the raw material mixed, add ferronickel catalyst, catalyst amount is the 1.5% of chelating agent raw materials for production weight, anaerobic reacting by heating 45min under the conditions of 750 DEG C, takes out pulverizing and obtain complexation molten gold agent after cooling.
Process gold-bearing material:
Add 8% complexation molten gold agent and 6% sodium peroxydisulfate in aqueous, adjusting pH value of solution is 11, heating-up temperature 60 DEG C, add Au-plated board, after 15s, the molten gold of circuit board completes, and takes out residue slag, adds new Au-plated board until can not be till molten gold, containing gold 5.1g/L in final solution, the gold-containing solution obtained after reaction uses zinc replacement to obtain bronze.
Embodiment
2
The preparation of complexation molten gold agent:
By medicament according to following ratio (mol ratio) mix homogeneously: carbamide: sodium hydroxide (potassium): sodium carbonate (potassium): sodium thiosulfate (potassium): sodium bromide (potassium)=4:3:3:2:0.5.Putting in reactor by the raw material mixed, add ferronickel catalyst, catalyst amount is the 1.5% of chelating agent raw materials for production weight, anaerobic reacting by heating 15min under the conditions of 600 DEG C, takes out pulverizing and obtain complexation molten gold agent after cooling.
Process gold-bearing material:
Add 12% complexation molten gold agent and 10% in aqueous and cross hydrogen peroxide, adjusting pH value of solution is 11, heating-up temperature 50 DEG C, add gold-plated souvenir badge, after 30s, the molten gold of souvenir badge completes, and takes out residue bed material, adds new gold-plated souvenir badge until can not be till molten gold, containing gold 4.3g/L in final solution, the gold-containing solution obtained after reaction uses zinc replacement to obtain bronze.
Claims (9)
1. the medicament of gold in the efficient molten leaching gold-bearing material of non-cyanogen, it is characterised in that described medicament is made up of complexation molten gold agent and oxidant, the mass ratio of complexation molten gold agent and oxidant is 5 ~ 20:5 ~ 15；The preparation method of described complexation molten gold agent is:
(1) by carbamide, sodium hydroxide (potassium), sodium carbonate (potassium), sodium thiosulfate (potassium), sodium bromide (potassium) (3 ~ 5) in molar ratio: (2 ~ 4): (2 ~ 4): (1 ~ 2): (0.5 ~ 1) mix homogeneously；
(2) putting in reactor by the raw material that step (1) mixes, add catalyst, catalyst amount is the 1 ~ 2% of chelating agent raw materials for production weight, and under the conditions of 450 ~ 900 DEG C, anaerobic or anoxia reacting by heating 15 ~ 90min are prepared under catalyst action.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterised in that described oxidant is the mixture of one or more in m-nitrobenzene sodium sulfonate, sodium peroxydisulfate and hydrogen peroxide.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterised in that the mass ratio of described complexation molten gold agent and oxidant is 8 ~ 12:6 ~ 10.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterised in that the catalyst described in the preparation method step (2) of complexation molten gold agent is ferronickel catalyst.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterized in that, the material molar ratio described in preparation method step (1) of complexation molten gold agent is, carbamide: sodium hydroxide (potassium): sodium carbonate (potassium): sodium thiosulfate (potassium): sodium bromide (potassium)=4:3:3:2:0.5.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterised in that the reaction temperature described in preparation method step (2) of complexation molten gold agent is 600 ~ 750 DEG C.
The medicament of gold in the efficient molten leaching gold-bearing material of a kind of non-cyanogen the most as claimed in claim 1, it is characterised in that the response time described in preparation method step (2) of complexation molten gold agent is 15 ~ 45min；Described reaction environment is oxygen free condition.
8. the using method of the medicament of gold in the efficient molten leaching gold-bearing material of non-cyanogen, it is characterised in that
(1) aqueous solution of the medicament described in configuration, in solution, complexation molten gold agent mass concentration is 5 ~ 20%, and oxidant mass concentration is 5 ~ 15%；
(2) adjusting pH value of solution is 9 ~ 14, and heating-up temperature 20 ~ 90 DEG C adds gold-bearing material to be extracted.
9. using method as claimed in claim 8, it is characterised in that the complexation molten gold agent concentration described in step (1) is 8 ~ 12%, and oxidant concentration is 6 ~ 10%；PH value of solution described in step (2) is 11；Heating-up temperature described in step (2) is 50 ~ 60 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476122.7A CN105886780A (en) | 2016-06-27 | 2016-06-27 | Agent for non-cyanide efficient leaching of gold in gold-bearing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476122.7A CN105886780A (en) | 2016-06-27 | 2016-06-27 | Agent for non-cyanide efficient leaching of gold in gold-bearing material |
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| Publication Number | Publication Date |
|---|---|
| CN105886780A true CN105886780A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610476122.7A Pending CN105886780A (en) | 2016-06-27 | 2016-06-27 | Agent for non-cyanide efficient leaching of gold in gold-bearing material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485116A (en) * | 2020-05-12 | 2020-08-04 | 深圳金贝得科技发展有限公司 | Efficient environment-friendly gold removing powder and gold recovery process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013049886A1 (en) * | 2011-10-04 | 2013-04-11 | Fine Gold Recovery Pty Ltd | Improvements in recovery of metals from ores |
| CN104372178A (en) * | 2014-07-14 | 2015-02-25 | 刘书志 | Composite gold-leaching agent and preparation method thereof |
| CN105274338A (en) * | 2010-08-20 | 2016-01-27 | 安格斯公司 | Sustainable process for reclaiming precious metals and base metals from e-waste |
| CN105543495A (en) * | 2014-11-04 | 2016-05-04 | 杨毓华 | Novel environmentally-friendly gold extraction agent |
-
2016
- 2016-06-27 CN CN201610476122.7A patent/CN105886780A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274338A (en) * | 2010-08-20 | 2016-01-27 | 安格斯公司 | Sustainable process for reclaiming precious metals and base metals from e-waste |
| WO2013049886A1 (en) * | 2011-10-04 | 2013-04-11 | Fine Gold Recovery Pty Ltd | Improvements in recovery of metals from ores |
| CN104372178A (en) * | 2014-07-14 | 2015-02-25 | 刘书志 | Composite gold-leaching agent and preparation method thereof |
| CN105543495A (en) * | 2014-11-04 | 2016-05-04 | 杨毓华 | Novel environmentally-friendly gold extraction agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485116A (en) * | 2020-05-12 | 2020-08-04 | 深圳金贝得科技发展有限公司 | Efficient environment-friendly gold removing powder and gold recovery process |
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Application publication date: 20160824 |
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