CN1232879A - Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore - Google Patents
Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore Download PDFInfo
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- CN1232879A CN1232879A CN98107651A CN98107651A CN1232879A CN 1232879 A CN1232879 A CN 1232879A CN 98107651 A CN98107651 A CN 98107651A CN 98107651 A CN98107651 A CN 98107651A CN 1232879 A CN1232879 A CN 1232879A
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- copper
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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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Abstract
The present invention includes the addition of proper amount of salt into copper containing aurin ore, roast at 650 deg.c, the extraction of copper with dilute sulfuric acid to obtain sulfuric acid soaked sludge, and the cyanidation extraction of Au and Ag inside sodium carbonate medium of pH 10. Because the AgCl produced in roast is easy to extract by cyanide solution, the present invention has high Ag extracting rate.
Description
The present invention relates to the novel process of comprehensive recovery of gold, silver, copper from gold ore, be specially adapted to reclaim in the copper-bearing gold concentrate Au, Ag, Cu.
At present, from copper-bearing gold concentrate, reclaim Au, Ag, Cu, adopt roast-cyanide process leaching technology usually.This technology comparative maturity, easy handling, the SO that roast produces
2Can prepare sulfuric acid, the leaching yield of gold reaches more than 95%, but the leaching rate of silver, copper is low, and especially Yin leaching rate only reaches about 30%, and this has not only wasted resource, and has influenced the raising of business economic benefit.
The present invention proposes the novel process that from copper-bearing gold concentrate, improves silver leaching rate.This technological operation is simple, does not increase facility investment, and cost is low, and the leaching rate of silver is brought up to more than 70%, and the leaching yield of gold, copper also increases, and has favorable economic benefit and social benefit.
First technology method of the present invention, promptly salt adding roast technology realizes by following program.
Take by weighing a certain amount of copper-bearing gold concentrate, add 3% salt (NaCl), mixing places High Temperature Furnaces Heating Apparatus to heat roast, rise to 650 ℃ from low temperature after, be incubated 0.5h again, in the roast process, want bubbling air also to stir frequently.
The salt of this process using is commercially available big grain salt, is crushed to-20 orders.
Second technology method of the present invention, the method for promptly extracting copper realizes by follow procedure.
The roast slag is placed in the container, add 3% sulphuric acid soln at 1: 3, under 80-90 ℃ of temperature, stir leaching 1h, will soak slag then and filter by solid-to-liquid ratio, washing, oven dry, leaching liquid adopts electrolytic process or substitution method to extract copper.
The 3rd technology method of the present invention, i.e. the method for cyaniding leaching gold and silver realizes by follow procedure.
The sulphur acid leaching residue of oven dry is placed in the container, carry out electronic agitation leach by following cyanidization condition, PH10 (yellow soda ash medium), sodium cyanide concentration 0.2-0.3%, solid-to-liquid ratio 1: 2, leaching time: 36h, leaching temperature: normal temperature.
The present invention compares with existing roast-cyanide process has following advantage:
1 present method is simple to operate, and the roast temperature is low fast, and the time is short, but brownout.
2 present method are not increasing equipment, do not increase under the situation of investment, can improve the rate of recovery 30-40% of silver, and the rate of recovery of gold, copper also increases.
Application example
Select somewhere, Shandong copper-bearing gold concentrate for use, its chemical ingredients is Au 96.3g/t, Ag164.36g/t, and Cu 4.00%, and S 39.90%.The grain number :-200 orders account for 60%.
1 salt adding roast
Take by weighing the 100g copper-bearing gold concentrate, add 3g salt, behind the mixing, put with porcelain boat on, put into horse
Not in the stove, be warmed up to 650 ℃ gradually from low temperature and carry out roast, for guaranteeing oxygen supply, half-open fire door is not
The disconnected stirring.
2 sulfuric acid to leach copper
Roast controlled be transferred in the 1000ml beaker, add 300ml 3% sulphuric acid soln, be heated to 80-90 ℃, and keep 1h, and stir frequently, this moment, copper was with CuSO
2Enter solution, remove after filtration, and will soak wash heat to neutral.
3 cyanidings are leached
After the oven dry of sulphur acid leaching residue, in electronic stirred leaching tank, carry out cyaniding and leach.Its condition is: sodium cyanide concentration 0.3%.With liquor ratio 1: 2, to size mixing to solution PH 10 with yellow soda ash, extraction time is 36h.
4 analyze
Cyaniding is carried out suction filtration with ore pulp after leaching, washing, and oven dry will be soaked slag then and be delivered to analyzer room mensuration Au, Ag, Cu content, calculate the leaching yield of Au, Ag, Cu respectively.It the results are shown in Table 1:
Table 1 test-results
| The roast condition | ????Au | ????Ag | ????Cu |
| Raw ore cyanogen slag leaching yield (gt) is (%) (g/t) | Raw ore cyanogen slag leaching yield (g/t) is (%) (g/t) | Raw ore cyanogen slag leaching yield (g/t) is (%) (g/t) | |
| Roast-cyaniding salt adding roast-cyaniding | 96.3????1.46????98.55 96.3????0.78????99.19 | ?164.36?103.01?37.33 ?164.36?23.88?85.47 | ?4.00??1.20??70.00 ?4.00??0.45??88.75 |
Claims (4)
1. proposed a kind of from copper-bearing gold concentrate the novel process of comprehensive recovery of gold, silver, copper.It is characterized in that in containing gold ore, adding a certain amount of salt, under 650 ℃ high temperature, carry out roast.The SO that produces during roast
2Can prepare sulfuric acid, the roast slag leaches copper with dilute sulphuric acid, and the sulphur acid leaching residue that makes adopts cyanide process leaching Au, Ag.
2. the described method of claim 1 is characterized in that adding in the copper-bearing gold concentrate per ton 30Kg salt (promptly 3%), behind the mixing, at 650 ℃ of following roast 0.5h.
3. method according to claim 1 is characterized in that the roast slag is leached copper with 3% sulphuric acid soln under 80 ℃ of conditions, and after filtration, washing after the oven dry, is leached Au, Ag with the sulphur acid leaching residue with cyanide process, and sulfuric acid to leach liquid adopts electrolysis or substitution method to extract copper.
4. the method for claim 1 is characterized in that adopting the condition of cyanide process leaching Au, Ag to be: PH10 (yellow soda ash medium), sodium cyanide concentration 0.3%, solid-to-liquid ratio: 1: 2.Leaching time: 36h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98107651A CN1232879A (en) | 1998-04-22 | 1998-04-22 | Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98107651A CN1232879A (en) | 1998-04-22 | 1998-04-22 | Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1232879A true CN1232879A (en) | 1999-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98107651A Pending CN1232879A (en) | 1998-04-22 | 1998-04-22 | Salt adding roast and cyanidation process to extract Au, Ag and Cu comprehensively for copper containing aurin ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1232879A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451192B (en) * | 2007-11-28 | 2010-09-01 | 灵宝市金源矿业有限责任公司 | Comprehensive recovery method for directly cyanating and intensified leaching multi-metal gold ore concentrate |
| CN103194770A (en) * | 2013-03-22 | 2013-07-10 | 紫金矿业集团股份有限公司 | Process for extracting gold from low-grade, copper-containing and difficultly-treated goldmine ammonia cyanide leaching pulp via electrodeposition |
| CN103789534A (en) * | 2014-02-18 | 2014-05-14 | 云龙县铂翠贵金属科技有限公司 | Method for enriching noble metals from high-sulfur material |
| CN104611542A (en) * | 2015-02-09 | 2015-05-13 | 池州冠华黄金冶炼有限公司 | Method for treating gold/silver/copper anode slime by medium-temperature chlorination process |
| CN103572322B (en) * | 2012-08-02 | 2017-05-10 | 厦门紫金矿冶技术有限公司 | Method for recycling gold and copper from copper-containing oxidization gold ores |
-
1998
- 1998-04-22 CN CN98107651A patent/CN1232879A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451192B (en) * | 2007-11-28 | 2010-09-01 | 灵宝市金源矿业有限责任公司 | Comprehensive recovery method for directly cyanating and intensified leaching multi-metal gold ore concentrate |
| CN103572322B (en) * | 2012-08-02 | 2017-05-10 | 厦门紫金矿冶技术有限公司 | Method for recycling gold and copper from copper-containing oxidization gold ores |
| CN103194770A (en) * | 2013-03-22 | 2013-07-10 | 紫金矿业集团股份有限公司 | Process for extracting gold from low-grade, copper-containing and difficultly-treated goldmine ammonia cyanide leaching pulp via electrodeposition |
| CN103194770B (en) * | 2013-03-22 | 2016-03-09 | 紫金矿业集团股份有限公司 | From low-grade cupric difficult-treating gold mine ammonia-cyanide leaching ore pulp, electrodeposition puies forward the technique of gold |
| CN103789534A (en) * | 2014-02-18 | 2014-05-14 | 云龙县铂翠贵金属科技有限公司 | Method for enriching noble metals from high-sulfur material |
| CN104611542A (en) * | 2015-02-09 | 2015-05-13 | 池州冠华黄金冶炼有限公司 | Method for treating gold/silver/copper anode slime by medium-temperature chlorination process |
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