CN1077604C - Technology for gold extraction by cyanide process with mixed auxiliary - Google Patents
Technology for gold extraction by cyanide process with mixed auxiliary Download PDFInfo
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- CN1077604C CN1077604C CN99102286A CN99102286A CN1077604C CN 1077604 C CN1077604 C CN 1077604C CN 99102286 A CN99102286 A CN 99102286A CN 99102286 A CN99102286 A CN 99102286A CN 1077604 C CN1077604 C CN 1077604C
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Abstract
The present invention relates to a technology for gold extraction by cyanide process with mixed auxiliary infusion, which belongs to the technology for extracting gold from refractory complex gold ores. The technology comprises the preparation of bismuth salt and the mixed auxiliary infusion. Technical conditions need to be controlled in the process of extracting gold. The mixed auxiliary infusion has large dissolubility in an alkaline cyanide solution, and can promote the dissolution of gold ores and overcome adverse influence brought by singly adding lead salt. The technology can process the refractory gold ores with a larger impurity range, and thus, the extraction rate of gold is enhanced and the extraction time is reduced. The technology is suitable for the extraction technology of complex refractory gold ores of lower grade.
Description
Technology for gold extraction by cyanide process with mixed auxiliary belongs to the cyanidation gold-extracted technical field of low-grade complex difficult-treating gold mine.
Along with the fast development of gold manufacture, it is day by day poor easily to handle gold ore resource on the one hand, and the difficult-treating gold mine more than 60% that accounts for world's gold reserves has become the important source material that gold is carried by domestic and international producer; The dump leaching technology of one of cyaniding gold-extracting method on the other hand, be to handle the low-grade main method that contains golden oxidized ore, from sixties development so far, treatment scale abroad reach 1,000,000 tons/heap, domestic reach 100,000 tons/heap more than, though this method is simple to operate, treatment capacity is big, but the production cycle is long, and leaching yield is low, and fund overstocks more.For solubility rate that improves gold and the dissolution rate of accelerating gold, remove and add necessary prussiate gold leaching-out agent such as sodium cyanide (NaCN), potassium cyanide (KCN) etc. and protect soda-lime, the sodium hydroxide, according to the different characteristics of ore, also add some other leaching agent.Known leaching agent has a variety of, for example adds calcium peroxide, hydrogen peroxide to improve the oxidizing potential of solution, quickens the oxidation dissolution of gold; Add flocculation agent or flocculation agents such as water glass, starch, carboxymethyl cellulose, polyacrylamide, quicken the sedimentation of ore pulp; Increase the wettability of ore with some tensio-active agent; Add some compounds and enter leach liquor with the oxious component that lowers in the ore, leaching agent of the present invention also is wherein a kind of.In dump leaching or all sliming cyanidation process; because lead salt can form galvanic cell with the gold in the ore; thereby can promote golden dissolving; reduce the harm of sulfur impurity, arsenic, antimony; but under the pH value condition with higher; when particularly lime was made protection alkali, lead salt can generate the plumbous cyanide film and suppress golden dissolving on the goldc grains surface.The add-on of lead salt is a bigger concentration range, in actual application, often be difficult to grasp owing to consumption and in ore maldistribution make its positive one side be difficult to play a role.Bismuth-containing compound can promote the dissolving of gold, uses as leaching agent in the cyanide gold-leaching process, and not only raw material cheaply is easy to get, and can also overcome the disadvantage that simple interpolation lead salt produces.
The objective of the invention is, utilize to contain bismuth mineral such as bismuth concentrate or nonferrous metallurgy bismuth-containing byproduct, prepare a kind of mixing leaching agent as raw material, in the cyanide gold-leaching process, use,, increase throughput to shorten the cyanide gold-leaching time, reduce impurity harm, thereby improve the leaching yield and the output of gold.
The present invention is achieved by the following technical solutions:
1. the production technique of bismuth salt and condition: adopt the bismuth-containing minerals as raw material, the control composition is, bismuth 19～60%, lead 1～25%, sulphur 6～25%, iron 3-10%, silica 1 .5～12%, antimony are less than 0.3%, output calcining after 800～830 ℃ of temperature oxidizing roasting, press concentration of nitric acid 3N～5N, 60～70 ℃ of temperature, liquid-solid ratio 4: 1～6: 1 (weight ratio), 3～5 hours condition of extraction time leaches calcining, heavy clear leach liquor obtains containing the crystallisate bismuth salt of Bismuth trinitrate 50～85% through evaporation, concentrated, oven dry;
2. the prescription that mixes leaching agent: above-mentioned bismuth salt 2～20%, lead nitrate 40～80%, ammonium nitrate 10～40% mixes;
3. mix the leaching agent working conditions: in gold containing ore dump leaching or all sliming cyanidation process, the pH value of leach liquor is transferred to 10～10.5, adds 0.05～1 kilogram of amount of mixing leaching agent by ore per ton and add in batches with lime or caustic soda.
Fig. 1 is the production scheme of bismuth salt of the present invention.
The present invention compares advantage and the good effect that has with known technology
1. can utilize the cheap bismuth byproduct that contains in bismuth mineral such as bismuth concentrate or the nonferrous metallurgy to make raw material, Can in bigger gold ore impurity level, use, because this mixing leaching agent is in soaking golden process Adding, can effectively suppress the harm of the impurity such as sulphur in the gold ore, arsenic, antimony, obviously improve gold Leaching velocity, increase the treating capacity of ore;
2. the preparation flow of bismuth salt is simple, and operation is easily gone, and use procedure does not change existing production technology Flow process is suitable for general cyanide gold-leaching process;
3. can overcome the adverse effect that simple interpolation lead salt brings, obviously shorten extraction time. Real Trample and show, the leaching rate of gold is 71.27% to add 0.3 when only adding 0.5 kg/tonne of lead acetate Leaching rate when kg/tonne mixing leaching agent is 78.59%.
Embodiment:
1. bismuth salt is to produce with the bismuth sulfide concentrate, and its Chemical Composition is bismuth 25%, lead 20%, sulphur 25%, iron 10%, silicon oxide 8%, and surplus is other compositions.
Processing condition: 800 ℃ of oxidizing roasting temperature
Concentration of nitric acid 4N, 60～70 ℃ of extraction temperatures
Liquid-solid ratio 4: 1, extraction time 4 hours
The crystallisate that obtains contains Bismuth trinitrate 50～60%
2. the partition of mixing leaching agent: Bismuth trinitrate 15%, lead nitrate 60%, ammonium nitrate 25%.
3. gold containing ore is through after the dump leaching, with lime the pH value of leach liquor is transferred to 10～10.5, adds 0.1～0.5 kilogram of mixing leaching agent for preparing by ore per ton, all the other flow processs and known technology are together, leaching yield improves more than 6 percentage points, and extraction time reduces 1/4th.
Claims (4)
1. technology for gold extraction by cyanide process with mixed auxiliary is characterized in that:
1) production technique of bismuth salt and condition: adopt the bismuth-containing minerals as raw material, the control composition is that bismuth 19～60%, lead 1～25%, sulphur 6～25%, iron 3～10%, silica 1 .5～12%, antimony are less than 0.3%, output calcining after the oxidizing roasting of 800～830C temperature, press concentration of nitric acid 3N～5N, 60～70 ℃ of temperature, liquid-solid ratio 4: 1～6: 1 (weight ratio), 3～5 hours condition of extraction time leaches calcining, heavy clear leach liquor obtains containing the bismuth salt of pin acid bismuth 50～85% through evaporation, concentrated, oven dry;
2) prescription of mixing leaching agent: above-mentioned bismuth salt 2～20%, sand nitre lead 40～80%, ammonium nitrate 10～40% mix;
3) mix the working conditions of leaching agent: gold containing ore is adjusted to 10～10.5 with lime or caustic soda with pH value and is added 0.05～1 kilogram by ore per ton in batches and mix leaching agent in dump leaching or all sliming cyanidation process.
2. technology for gold extraction by cyanide process with mixed auxiliary according to claim 1 is characterized in that: bismuthiferous raw material is the bismuth concentrate, and its Chemical Composition is bismuth 25%, lead 20%, sulphur 25%, iron 10%, silicon-dioxide 8%.
3. according to claim 1, described technology for gold extraction by cyanide process with mixed auxiliary is characterized in that: the processing condition of bismuth salt production are 800 ℃ of oxidizing roasting temperature, concentration of nitric acid 4N, 60～70 ℃ of extraction temperatures, liquid-solid ratio 4: 1 (weight ratio), extraction time 4 hours.
4. according to claim 1,2 described technology for gold extraction by cyanide process with mixed auxiliary is characterized in that: the prescription that mixes leaching agent is a bismuth salt 15%, lead nitrate 60%, ammonium nitrate 25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102286A CN1077604C (en) | 1999-02-10 | 1999-02-10 | Technology for gold extraction by cyanide process with mixed auxiliary |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102286A CN1077604C (en) | 1999-02-10 | 1999-02-10 | Technology for gold extraction by cyanide process with mixed auxiliary |
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| CN1226605A CN1226605A (en) | 1999-08-25 |
| CN1077604C true CN1077604C (en) | 2002-01-09 |
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| CN99102286A Expired - Fee Related CN1077604C (en) | 1999-02-10 | 1999-02-10 | Technology for gold extraction by cyanide process with mixed auxiliary |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386450C (en) * | 2005-03-23 | 2008-05-07 | 中南大学 | Cooperated leaching method for low-grade intractable gold mine |
| CN101798631A (en) * | 2010-04-20 | 2010-08-11 | 王吉青 | Method for extracting gold from gold-concentration flotation tailings |
| CN102226240B (en) * | 2011-05-31 | 2013-08-14 | 广西地博矿业集团股份有限公司 | Heap leaching process for arsenium/stibium-containing refractory fine-grain gold oxide ore and leach liquor thereof |
| CN104451187B (en) * | 2014-10-09 | 2016-07-06 | 厦门紫金矿冶技术有限公司 | A kind of Ultrafine Grinding preprocess method of golden ore concentrate hard to treat |
| CN107217153A (en) * | 2017-04-12 | 2017-09-29 | 宋惠斌 | A kind of inexpensive gold mine leaching agent |
| CN107699709A (en) * | 2017-10-20 | 2018-02-16 | 广西南宁晴空万里环保科技有限公司 | Environment-friendly and low-toxicity mineral dressing additive for gold mine and preparation method thereof |
| CN109652644B (en) * | 2019-01-07 | 2020-09-29 | 山东联盟磷复肥有限公司 | Gold leaching agent for gold-containing tailings and preparation method thereof |
| CN112981130B (en) * | 2021-02-07 | 2022-10-25 | 黄伟 | Environment-friendly gold extracting agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101948A (en) * | 1994-06-29 | 1995-04-26 | 四川联合大学 | Method for raising cyaniding extraction rate and recovery percent of carbonaceous gold ore by compound inhibitor |
| CN1186167A (en) * | 1996-11-25 | 1998-07-01 | 株式会社丰田自动织机制作所 | Compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101948A (en) * | 1994-06-29 | 1995-04-26 | 四川联合大学 | Method for raising cyaniding extraction rate and recovery percent of carbonaceous gold ore by compound inhibitor |
| CN1186167A (en) * | 1996-11-25 | 1998-07-01 | 株式会社丰田自动织机制作所 | Compressor |
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| CN1226605A (en) | 1999-08-25 |
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