CN1304606C - Method for extracting gold - Google Patents
Method for extracting gold Download PDFInfo
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- CN1304606C CN1304606C CNB2005100217550A CN200510021755A CN1304606C CN 1304606 C CN1304606 C CN 1304606C CN B2005100217550 A CNB2005100217550 A CN B2005100217550A CN 200510021755 A CN200510021755 A CN 200510021755A CN 1304606 C CN1304606 C CN 1304606C
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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
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Abstract
The present invention discloses a method for extracting gold, which comprises the steps that (1) gold ore-bearing materials are added with water and are made into ore pulp; (2) the internal part of the ore pulp is added with chemical extraction agents, and then, the superfine processing of the ore pulp is carried out; the granularity of the ore pulp is not greater than 1 micrometer; dynamic extraction is synchronously carried out in the superfine processing process, or, the superfine processing of the ore pulp is firstly carried out; the granularity of the ore pulp is no greater than 1 micrometer, and then, chemical extraction agents are added for sufficient extraction; (3) solid-liquid separation is carried out, and the liquid and the gold-bearing extract in the liquid are reserved. The method of the present invention which omits calcination steps has the advantages of mild operating conditions, no pollution of the environment, high extraction rate, accelerated extracting process, less investment cost and production cost, and low cost, and the present invention has great economic value.
Description
Technical field
The present invention relates to a kind of method of extracting precious metal, especially relate to a kind of method of extracting metallic gold.
Background technology
Gold must just can obtain the simple substance gold through electrolysis after handling through cyaniding, but the waste liquid after the electrolysis can produce a large amount of muddy throw outs in treating processes, be called " pond sludge " traditionally, and its main component is gac and sal.And all contain a large amount of gold (content does not wait to more than 1,000 gram/tons from several hectograms/ton) in the pond sludge, if can extract and will be a great riches.Coagulate cotton-shaped attitude because gac in the pond sludge and sal are, and contained gold granules is superfine, mostly below 1 μ m, be wrapped in gac and sal coagulate cotton-shaped in; And there is one deck coating on the gold granules surface, makes the extraction chemistry reaction be difficult to carry out; Therefore, if without processing and directly cyaniding to leach be the gold that impossible extract with high extraction yield wherein.
For this reason, extracting gold from from pond sludge at present must be at first with the pre-treatment of pond sludge process, and the best way is exactly by calcination method, and then will leach by cyanide process through incinerating pond sludge.But this method can be discharged poisonous fume in calcination process, and the extraction yield of energy consumption height, production cost height, gold is low, still contains tens of gram gold in the final pond sludge and can not be extracted utilization.And calcination method handles pond sludge and extracts gold from, and the environmental pollution that is caused also is a problem demanding prompt solution.
In the non-ferrous metals industry in the production process, produce a large amount of anode sludge, negative electrode mud, the general designation electrolytic slime, wherein contain noble metals such as gold and silver, also contain various objectionable impuritiess (mercury, chromium etc.), existing extraction process falls behind mostly, just causes environmental pollution in its treating processes, because extraction yield is low, has caused huge waste.
Therefore develop a kind of advanced technology, gold extraction yield height, free of contamination novel technique is very necessary.
Summary of the invention
The objective of the invention is for a kind of extraction yield height, pollution-free, the method that extracts gold from cheaply are provided.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses a kind of method that extracts gold from, described method comprises step:
(1) will contain the gold mine material adds water and makes ore pulp;
(2) add the chemical extraction agent in ore pulp, the ultra-fine granularity that is processed into of ore pulp is not more than 1 micron ore pulp afterwards, carries out dynamic extraction in the ultra-fine treating processes synchronously,
Perhaps earlier the ultra-fine granularity that is processed into of ore pulp is not more than 1 micron ore pulp, adds the chemical extraction agent afterwards again and fully extract;
(3) carry out solid-liquid separation, retaining liquid contains the extract of gold in the liquid.
Further comprise step (4) after the described step (3): the liquid that keeps is obtained gold through resolving.
The described gold mine material that contains is pond sludge or electrolytic slime.Described pond sludge is meant in the leaching process of gold, after cyaniding is handled, and obtains a large amount of muddy throw out that the waste liquid behind the simple substance gold produces through electrolysis in treating processes.Described electrolytic slime is in non-ferrous metals industry in the production process, a large amount of anode sludge of generation or negative electrode mud.
Described ore pulp is that solid content is 30%～50% ore pulp.
Described chemical extraction agent is selected from thiocarbamide, potassium cyanide, sodium cyanide, Sulfothiorine.
The ratio of gold molar content is 1.1: 1～12: 1 in the molar content of the chemical extraction agent that is added and the ore pulp.
Described ultra-fine processing is carried out in ultrafine eddy flow attitude grinding machine.
Described solid-liquid separation is meant carries out centrifugation under the condition of 1500～1800r/min.
Owing to adopted above scheme, be that the beneficial effect that the present invention possesses is:
The method that extracts gold from of the present invention, be to adopt nanotechnology, with the ultra-fine granularity that is processed into of ore pulp at the ore pulp below 1 micron, thereby the gold that is wrapped is separated with its associated mineral, gold granules is fully exposed and coating also is stripped from, and extraction process can fully be carried out; Method operational condition gentleness of the present invention, production process is continuous, and is nontoxic, free from environmental pollution, the extraction yield height, special in the pond sludge gold that is difficult to leach, extraction yield significantly improves, and can bring immense value for enterprise and society; And the method that extracts gold from of the present invention has been saved calcining step, compares with traditional method, and investment cost and productive expense are few, and cost greatly reduces, and can replace existing calcining-cyanide process, is more suitable for national conditions, applies at home easilier.Such as, method of the present invention at home the extraction rate reached to 99.5% in the tame large-scale gold mine industrialization production process (containing gold in the former pond sludge is 218.92 gram/tons, containing gold in the pond sludge after extracting is 0.6 gram/ton, only this factory uses 220 kilograms of the annual just many volume increase gold of this technology, promptly increase by 2,640 ten thousand yuan of the output values, and the cost of every extraction one gram gold only needs 5.6 yuan/gram, and added value is high!
In preferable methods of the present invention, adopt and carry out dynamic extraction in the ultra-fine treating processes synchronously, the chemical extraction agent is fully contacted in dynamic process with gold granules, and because specific surface area is big, so react very abundant, reaction times shortens greatly, and the gold extraction yield further improves, and is up to 99.9%.
Embodiment
In the method that from pond sludge or electrolytic slime, extracts gold from, comprise the steps:
1) pond sludge or electrolytic slime being made solid content is 30%～50% ore pulp.Solid content surpasses 50%, and the viscosity height is unfavorable for the ultra-fine separation of gold, and solid content is lower than 30%, and effectively treatment capacity is low, can corresponding raising production cost.
2) ore pulp being dropped into the ultra-fine granularity that is processed into of grinding machine is the ore pulp of nanometer to sub-micrometer scale: be about to ore pulp and drop into preferably that to carry out the ultra-fine granularity that is processed in the ultrafine eddy flow attitude grinding machine be that nanometer scale is that granularity is not less than 12000 purpose ore pulps below 1 micron.Enter the ore pulp in the ultrafine eddy flow attitude grinding machine, because the radius apart from the axle center does not wait in the horizontal direction, thereby linear velocity difference, and have a plurality of linear velocities, therefore rotation in the horizontal direction is a speed-change process, suffered shearing, extruding, the collision of different sections at the same inner core of ultrafine eddy flow attitude grinding machine, significantly improved grinding efficiency, the disintegration of mineral internal tiny crack by ultra-fine be processed into granularity be submicron to the particle of nanometer scale below 1 micron, gold granules is fully exposed and coating also is stripped from.
Described ultra-fine to be processed into granularity be submicron to the step of the ore pulp of nanometer scale also can stir in the mill at ultrafine vibration mill or ultrafine and carry out, but fineness is difficult to meet the demands, and cost is too high.
The input of described ore pulp is to adopt the pump delivery mode.
3) before ultra-fine processing or after the ultra-fine processing, add a certain amount of extraction agent according to the gold content in the ore pulp.Preferred version of the present invention is to add the chemical extraction agent before ultra-fine processing, and ultra-fine process and extraction process are carried out synchronously.General requirement gold molar content: the extraction agent molar content is between 1: 1.1～1: 12, but gold granules is thin, the state that is wrapped is serious, then requires the extraction agent consumption big, is beneficial to reaction and carries out.If extraction synchronously, in whole ultra-fine treating processes, ultra-fine limit, limit extracts so, the chemical extraction agent is fully contacted in dynamic process with gold granules, and because specific surface area is big, so reaction is very abundant, reaction times shortens greatly, and the gold extraction yield improves greatly.As after ultra-fine process, adding extraction agent, then require the extraction process proper extension, until extraction rate reached to requiring.
The present invention is described in further detail below by specific embodiment.
Embodiment 1
With the Gold Content of Fujian Zijin mining industry gold smelting factory is 15 kilograms in the pond sludge (meter of giving money as a gift) of 218.92 gram/tons, adding water, to make solid content be 35% ore pulp (wherein containing 0.01667 mole of gold), add 11 gram thiocarbamides (0.1445 mole) simultaneously, then described ore pulp being dropped in the WX1 type ultrafine eddy flow attitude grinding machine that Shenzhen big male mechanical means company limited produces with 30 fens ultra-fine granularities that are processed into of clock time is the ore pulp (D50=0.37 μ) of submicron to nanometer scale, carry out solid-liquid separation by whizzer then, the rotating speed of whizzer is 1500---1800r/min.Gained liquid promptly obtains gold by resolving, and parsing can obtain gold by add the zine plate reduction in solution; Also can obtain gold by electrolytic method.Be weighed as 3.258 grams, extraction yield is up to 99.2%.
Implement sharp 2
15 kilograms in pond sludge among the embodiment 1 (meter of giving money as a gift) is added water, and to make solid content be 35% ore pulp, add extraction agent sodium cyanide 1.66 grams simultaneously, then described ore pulp being dropped in the WX1 type ultrafine eddy flow attitude grinding machine that Shenzhen big male mechanical means company limited produces with 30 fens ultra-fine granularities that are processed into of clock time is the ore pulp (D50=0.37 μ) of submicron to nanometer scale, carry out solid-liquid separation by whizzer (speed range of the whizzer that sets is 1500---1800r/min) then, liquid promptly obtains gold by resolving.Be weighed as 3.277 grams, extraction rate reached 99.8%.
Embodiment 3
15 kilograms in pond sludge among the embodiment 1 (meter of giving money as a gift) is added water, and to make solid content be 35% ore pulp, add extraction agent potassium cyanide 11.71 grams simultaneously, then described ore pulp being dropped in the WX1 type ultrafine eddy flow attitude grinding machine that Shenzhen big male mechanical means company limited produces with 30 fens ultra-fine granularities that are processed into of clock time is the ore pulp (D50=0.37 μ) of submicron to nanometer scale, carry out solid-liquid separation by whizzer (speed range of the whizzer that sets is 1500---1800r/min) then, liquid promptly obtains gold by resolving.Be weighed as 3.281 grams, extraction rate reached 99.9%.
Embodiment 4
15 kilograms in pond sludge among the embodiment 1 (meter of giving money as a gift) is added water, and to make solid content be 35% ore pulp, add extraction agent Sulfothiorine 25.23 grams simultaneously, then described ore pulp being dropped in the WX1 type ultrafine eddy flow attitude grinding machine that Shenzhen big male mechanical means company limited produces with 30 fens ultra-fine granularities that are processed into of clock time is the ore pulp (D50=0.37 μ) of submicron to nanometer scale, carry out solid-liquid separation by whizzer (speed range of the whizzer that sets is 1500---1800r/min) then, liquid promptly obtains gold by resolving.Be weighed as 3.241 grams, extraction rate reached 98.7%.
Embodiment 5
15 kilograms in pond sludge among the embodiment 1 (meter of giving money as a gift) is added water, and to make solid content be 35% ore pulp, do not add the extraction agent thiocarbamide, be the ore pulp (D50=0.37 μ) of submicron with 30 fens ultra-fine granularities that are processed into of clock time in the WX1 type ultrafine eddy flow attitude grinding machine of producing through the big male mechanical means in Shenzhen company limited then to nanometer scale, add extraction agent thiocarbamide 9.17 grams, extract leaching, the extraction time is 30 minutes, extraction rate reached 42%; The extraction time reaches 6 hours, extraction rate reached 95%.
Comparative Examples
Directly 1000 grams (meter of giving money as a gift) of the pond sludge among the embodiment 1 are added extraction agent thiocarbamide 0.62 gram and extract leaching, the extraction time is 30 minutes, extraction rate reached 9%; The extraction time reaches 6 hours, extraction rate reached 69%.
Embodiment 6
Embodiment extracts gold from from the anode sludge:
20 kilograms of the electrolytic copper anode sludge (Gold Content is 629.32 gram/tons) (meter of giving money as a gift) with the smeltery, Yunnan, adding water, to make solid content be 35% ore pulp (wherein containing 0.0639 mole of gold), add 32 gram thiocarbamides (0.4211 mole) simultaneously, then described ore pulp being dropped in the WX1 type ultrafine eddy flow attitude grinding machine that Shenzhen big male mechanical means company limited produces with 30 fens ultra-fine granularities that are processed into of clock time is the ore pulp (D50=0.33 μ) of submicron to nanometer scale, carry out solid-liquid separation by whizzer then, the rotating speed of whizzer is 1500---1800r/min.Gained liquid promptly obtains gold by resolving.Be weighed as 12.423 grams, extraction yield is up to 98.7%.
Claims (9)
1, a kind of method that extracts gold from, described method comprises step:
(1) will contain the gold mine material adds water and makes ore pulp;
(2) add the chemical extraction agent in ore pulp, the ultra-fine granularity that is processed into of ore pulp is not more than 1 micron ore pulp afterwards, carries out dynamic extraction in the ultra-fine treating processes synchronously,
Perhaps earlier the ultra-fine granularity that is processed into of ore pulp is not more than 1 micron ore pulp, adds the chemical extraction agent afterwards again and fully extract;
(3) carry out solid-liquid separation, retaining liquid contains the extract of gold in the liquid.
2, a kind of method that extracts gold from according to claim 1 is characterized in that: further comprise step (4) after the described step (3): the liquid that keeps is obtained gold through resolving.
3, a kind of method that extracts gold from according to claim 1 is characterized in that: the described gold mine material that contains is pond sludge or electrolytic slime.
4, a kind of method that extracts gold from according to claim 2 is characterized in that: the described gold mine material that contains is pond sludge or electrolytic slime.
5, according to the arbitrary described a kind of method that extracts gold from of claim 1～4, it is characterized in that: described ore pulp is that solid content is 30%～50% ore pulp.
6, according to the arbitrary described a kind of method that extracts gold from of claim 1～4, it is characterized in that: described chemical extraction agent is selected from thiocarbamide, potassium cyanide, sodium cyanide, Sulfothiorine.
7, a kind of method that extracts gold from according to claim 6 is characterized in that: the ratio of gold molar content is 1.1: 1～12: 1 in the molar content of the chemical extraction agent that is added and the ore pulp.
8, according to the arbitrary described a kind of method that extracts gold from of claim 1～4, it is characterized in that: described ultra-fine processing is carried out in ultrafine eddy flow attitude grinding machine.
9, according to the arbitrary described a kind of method that extracts gold from of claim 1～4, it is characterized in that: described solid-liquid separation is meant carries out centrifugation under the condition of 1500～1800r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100217550A CN1304606C (en) | 2005-09-22 | 2005-09-22 | Method for extracting gold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100217550A CN1304606C (en) | 2005-09-22 | 2005-09-22 | Method for extracting gold |
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| CN1766136A CN1766136A (en) | 2006-05-03 |
| CN1304606C true CN1304606C (en) | 2007-03-14 |
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| CNB2005100217550A Expired - Fee Related CN1304606C (en) | 2005-09-22 | 2005-09-22 | Method for extracting gold |
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| CN103320624B (en) * | 2013-07-05 | 2014-07-30 | 昆明理工大学 | Method for selectively extracting gold and silver from copper anode slime |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004042094A1 (en) * | 2002-11-06 | 2004-05-21 | Xstrata Queensland Ltd | Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004042094A1 (en) * | 2002-11-06 | 2004-05-21 | Xstrata Queensland Ltd | Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGXI DIBO MINING INDUSTRY CO., LTD. Free format text: FORMER OWNER: SOUTH CHINA UNIVERSITY OF TECHNOLOGY Effective date: 20090828 |
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Effective date of registration: 20090828 Address after: No. 63 Jinhu Road, Nanning, Jin Yuan, 19, 1936, modern city, Guangxi Patentee after: Guangxi Bo Bo Mining Co., Ltd. Address before: Five mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: South China University of Technology |
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| C56 | Change in the name or address of the patentee |
Owner name: GUANGXI DIBO MINE GROUP CO., LTD. Free format text: FORMER NAME: GUANGXI DIBO MINING INDUSTRY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 530022, No. 63 Jinhu Road, Nanning, Jin Yuan, 19, 1936, modern city, Guangxi Patentee after: Guangxi Dibo Mine Group Co., Ltd. Address before: 530022, No. 63 Jinhu Road, Nanning, Jin Yuan, 19, 1936, modern city, Guangxi Patentee before: Guangxi Bo Bo Mining Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 Termination date: 20140922 |
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