CN1067271A - Extract the method for gold and silver with lime sulfur mixture - Google Patents

Extract the method for gold and silver with lime sulfur mixture Download PDF

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Publication number
CN1067271A
CN1067271A CN92101947A CN92101947A CN1067271A CN 1067271 A CN1067271 A CN 1067271A CN 92101947 A CN92101947 A CN 92101947A CN 92101947 A CN92101947 A CN 92101947A CN 1067271 A CN1067271 A CN 1067271A
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gold
silver
ore
accordance
contain
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CN1030930C (en
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张箭
丁峰
袁志昌
兰新哲
程文清
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XI-AN METALLURGICAL CONSTRUCTION COLLEGE
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XI-AN METALLURGICAL CONSTRUCTION COLLEGE
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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 is a kind of method of extracting gold and silver from Gold Ore or aurin powder with lime sulfur mixture.
The present invention mixes with leaching agent by a certain percentage with containing golden raw material, adds oxygenant and active stabilizer then.Also can add an amount of inorganic oxide as special additive for refractory ore.Leach reaction 3～12 hours at normal temperature or under less than the 320K temperature, the solution that will contain gold and silver again reduces with reductive agent, and impurity separates, and produces the proof gold fine silver.
Dissolvd gold speed of the present invention is fast, and leaching yield height, nontoxic, cheap, waste liquid are easily handled, and help preserving the ecological environment.Present method can be widely used in and contain golden oxidized ore, sulphide ores and many metals refractory ore as containing producing of ore deposit gold and silver such as arsenic, antimony, bismuth, high alumina, high-copper.

Description

Extract the method for gold and silver with lime sulfur mixture
The present invention is a kind of method of extracting gold and silver from Gold Ore or aurin powder with lime sulphur solution.
Usually from ore or aurin powder, extract the method for gold and silver, mainly contain cyanide process, amalgam process, and difficult ore has also been used water chlorination process slightly, thiocarbamide method and thiosulfate technique etc.International and domestic traditional cyanide process is to use the poisonous reagent prussiate, as NaCN, and KCN, Ca(CN) 2, soak aurin powder or drip washing scrap piece (dump leaching), participate in down at oxygenant, golden and a spot of silver changes solution over to, then gold and silver is replaced as gold mud with zinc or aluminium powder, and it is product that last melting gold mud gets the gold and silver alloy.The advantage of this method is: with low cost, easy and simple to handle, process is simple.Its outstanding shortcoming is: contain strong toxicity cyanogen root CN in the waste water 1. -, can discharge after need handling, expensive bigger, 2. the recovery of gold and silver of this method is lower, and particularly silver is very low for general＜90%, and general＜30% 3. pair contains arsenic, antimony, bismuth and high lead, high-copper, high-carbon, doctor positive ore, and its leaching yield is lower.Other method, as water chlorination process, it is low etc. that thiosulfate technique and amalgam process etc., also all too high because of its poor selectivity, cost, or poisonous and extraction yield are crossed, and all is not widely used in production, uses and only cooperate other ore dressing or smelting process to make householder method.
The objective of the invention is, study a kind of method of new extraction gold and silver, to replace traditional cyanide process.Employed molten gold reagent is nontoxic, be easy to get, cheapness; help protecting human ecological environment and life security; simultaneously dissolvd gold speed is fast, and the leaching yield height not only is applicable to generally to contain golden oxidized ore and sulphide ores but also be applicable to that many metals contain refractory ores such as arsenic, antimony, bismuth, lead bronze.
The gold reagent that soaks used in the present invention, it is a kind of novel agent, it is the mixture of a kind of polysulfide and thiosulphate, is alkalescence, its proportion between 1.02～1.30, and we claim that it is lime sulphur solution (this leaching agent is declared patent of invention simultaneously).
At first by certain liquid-solid ratio, the aurin powder raw material is mixed with leaching agent, add oxygenant, active stabilizer then, leach reaction 3～12 hours at normal temperature or under less than the 320K temperature, make reductive agent with V-Brite B then, the precipitate reduction gold and silver is cast ingot again with the gold mud that displaces after pickling impurity removal matter, precipitate silver halide from washing lotion, directly melting obtains silver ingot.Maybe will replace gold mud prepare burden into crucible for smelting many metal alloys, pickling separating impurity element then, refining casting ingot.
The concrete grammar that extracts gold and silver is as follows:
1. at first the aurin powder is mixed with 1: 2～5 ratio mutually with leaching agent;
2. add an amount of oxygenant, the present invention adopts air or oxysalt class to make oxygenant, and its consumption is 0.1～2.5 kilogram of/ton aurin powder;
3. adding ammoniacal liquor, to regulate medium in right amount free for well with 1～15 grams per liter;
4. because the leaching agent instability needs the activity stabilized additive of adding, as (NH in the process 4) 2SO 3, Na 2SO 3, H 2SO 2Or the like, with Na 2SO 3Be example, its concentration is 1.0～12.5 kilograms of/ton aurin powder;
5. leach reaction at normal temperature or under less than the 320K temperature, make gold and silver enter solution with the title complex form, react after 3～12 hours, leaching finishes;
6. the solution V-Brite B (Na that will contain gold and silver 2S 2O 4) wait the reductive agent reduction, in about 1～8 hour of reaction times, middling speed stirs, the gold and silver reduction is very thorough, used Na 2S 2O 4Be advisable for three times to cross theoretical amount.
With the gained gold mud after removing impurity and gold and silver separate, produce proof gold respectively, fine silver.The mountain is in reduction process, and the employing V-Brite B is a reductive agent, so increased effective ingredient Na in leaching agent 2S 2O 3Concentration, help leaching agent and continue to return use.
The new extraction gold that the present invention is given, the method of silver, owing to used lime sulfur mixture to make leaching agent, so solvent is nontoxic, be easy to get, cheap, owing in leaching process, add oxygenant, active stabilizer etc., effect is remarkable, dissolvd gold speed is greatly accelerated, it soaks golden speed to general ore, be higher than 2～8 times of cyanide processs, cyanide process is soaked the gold time usually more than 24 hours, and adopting this law only to need 3～12 hours: leaching yield is higher than cyanide process about 2～4%, simultaneously, the solution that soaks behind the gold can be recycled through adjustment, when cancelling as leaching agent, because wherein contained Chemical Composition is an ammonium polysulfide, ammonium thiosulfate, ammonium sulphites etc. also can be irrigated as fertilizing the soil after neutralizing treatment, turn waste into wealth.Pollution-free to human ecological environment.
Further describe below in conjunction with example.
The dissolving of (example one) proof gold
Get 99.99% proof gold, making area is 1 square centimeter garden dish, and is fixed on the turning axle, and the lime sulfur mixture that will add ammoniacal liquor buries the garden dish, start the agitator two hours that per minute 500 changes under the normal temperature, the dissolution rate that records gold is: 1.85～2.12 * 10 -5Mole/rice 2Second.As with one times of lime sulfur mixture dilution, then Jin molten speed is 0.6～0.75 times of last value.
(example two) quartz type contains golden oxidized ore
Get that to contain gold be fine ore 200 grams of 80.25g/T for 65.73g/T, argentiferous, add 600 milliliters lime sulfur mixture, add ammoniacal liquor and make it keep free NH with 1: 3 solid-to-liquid ratio 31～15g/l, PH＞14, agitation leach 10 hours, washing (twice) after filtration, filtrate, washing lotion contain also.Soak slag and contain golden 1.26g/T, silver-colored 7.31g/T, gold soak rate 98.08%, silver 90.88%.Contain golden liquid and used theoretical amount triple vat powder reduction two hours, gold and silver is all thoroughly reduced precipitating.Gold mud is refined into alloy through pyrogenic process, again with behind acid decomposition silver and the beavy metal impurity, and proof gold mud refining ingot.Silver in the acid solution is separated out with the AgCl precipitation, directly refines out silver ingot with the AgCl form.Product gold purity 99.8%, silver 98.5%.
The quartzy sulphide ores of (example three) pyrite type
Get and contain golden 50g/T, argentiferous 210g/T, cupric 2%, lead 21%, aurin powder 200 grams of sulphur 32.17%, the Na of adding 30g/l 2SO 3, add again contain the oxygen inorganic salt a little, stirring reaction 12 hours filters washery slag three times, the slag analytical results contains golden 0.7g/T, silver-colored 22.5g/T.Gold leaching rate 98.63%, silver leaching rate 89.27%.After merging filtrate, the washing lotion, with the excessive three times of precipitation gold and silver of vat powder, solution stirring reduction 1～8 hour, the method for gained gold mud use-case two is handled, or directly soaks 4 hours with mineral acid, makes silver and heavy metal go into liquid.Pure gold mud is with soda, the refining of borax equal solvent gets ingot.Silver-colored treatment process is with example two in the solution.
Dissolvd gold speed of the present invention is fast, the leaching yield height, and nontoxic, cheap, waste liquid is easily handled, and helps preserving the ecological environment.Present method can be widely used in and contain golden oxidized ore, sulphide ores and many metals refractory ore, as contains producing of gold and silver such as arsenic, antimony, bismuth, high lead, high-copper.

Claims (7)

1, a kind of method of extracting gold and silver from Gold Ore or aurin powder is characterized in that: use lime sulphur solution to make leaching agent.To contain golden raw material and mix by a certain percentage, participate in down, add an amount of SO that contains at air or oxysalt class oxygenant with leaching agent = 3Active stabilizer.Leach reaction 3～12 hours then at normal temperature or under less than the 320K temperature, the solution that will contain gold and silver at last reduces with reductive agents such as connecting S-WAT.
2, in accordance with the method for claim 1, it is characterized in that employed lime sulfur mixture proportion is between 1.02～1.30;
3, in accordance with the method for claim 1, the ratio that it is characterized in that containing golden raw material and leaching agent is 1: 2～5;
4, in accordance with the method for claim 1, the concentration that it is characterized in that the ammonia that adds is 1～15 grams per liter;
5, in accordance with the method for claim 1, it is characterized in that oxysalt class oxygenant consumption is 0.1～2.5 kilogram of/ton aurin powder;
6, in accordance with the method for claim 1, it is characterized in that: the active stabilizer consumption that is added is 1～12.5 kilogram of/ton aurin powder;
7, in accordance with the method for claim 1, it is characterized in that used reductive agent is that its consumption of V-Brite B is three times of theoretical amount; Reaction times is 1～8 hour.
CN92101947A 1992-03-31 1992-03-31 Process for extracting Au or Ag using mixture of lime and sulfur Expired - Lifetime CN1030930C (en)

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CN92101947A CN1030930C (en) 1992-03-31 1992-03-31 Process for extracting Au or Ag using mixture of lime and sulfur

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CN1067271A true CN1067271A (en) 1992-12-23
CN1030930C CN1030930C (en) 1996-02-07

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1044824C (en) * 1995-09-05 1999-08-25 西安建筑科技大学 Method for extracting noble metal by using modified lime-sulfur mixture
WO2000017407A1 (en) * 1998-09-21 2000-03-30 M.I.M. Holdings Limited Method for treating precious metal bearing minerals
AU744356B2 (en) * 1998-09-21 2002-02-21 M.I.M. Holdings Limited Method for treating precious metal bearing minerals
WO2004042094A1 (en) * 2002-11-06 2004-05-21 Xstrata Queensland Ltd Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates
CN103088218A (en) * 2013-01-16 2013-05-08 西北师范大学 Method for extracting silver and lead from smelting slag generated by pyrogenic process treatment of copper anode mud
CN103243222A (en) * 2013-04-24 2013-08-14 中南大学 Modified lime sulphur and application thereof in gold leaching technology
CN103555949A (en) * 2013-07-16 2014-02-05 紫金矿业集团股份有限公司 Method for recovering gold from low concentration gold-containing wastewater under high salinity high chlorine system
CN104862494A (en) * 2015-05-05 2015-08-26 中南大学 Gold leaching process from sulfide gold mine
CN105344485A (en) * 2015-10-16 2016-02-24 中南大学 Method for recycling gold and interlocked mass of gold from refractory gold ore based on sulfur-oil aggregative flotation
CN106167857A (en) * 2016-06-24 2016-11-30 中国科学院过程工程研究所 A kind of comprehensive cleaning reclaims gold, carbon, sulfur and the method for element silicon in Carbonaceous gold ore
CN111088435A (en) * 2019-11-01 2020-05-01 新疆金川矿业有限公司 Lime sulfur mixture, preparation method thereof and use method thereof in gold leaching
CN112067490A (en) * 2020-09-16 2020-12-11 励福(江门)环保科技股份有限公司 Novel gravimetric method for determining gold content in aqua regia

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1044824C (en) * 1995-09-05 1999-08-25 西安建筑科技大学 Method for extracting noble metal by using modified lime-sulfur mixture
WO2000017407A1 (en) * 1998-09-21 2000-03-30 M.I.M. Holdings Limited Method for treating precious metal bearing minerals
AU744356B2 (en) * 1998-09-21 2002-02-21 M.I.M. Holdings Limited Method for treating precious metal bearing minerals
WO2004042094A1 (en) * 2002-11-06 2004-05-21 Xstrata Queensland Ltd Reducing cyanide consumption in gold recovery from finely ground sulphide ores and concentrates
CN103088218B (en) * 2013-01-16 2015-08-12 西北师范大学 Silver, plumbous method is extracted from the smelting slag that copper anode mud pyrogenic attack produces
CN103088218A (en) * 2013-01-16 2013-05-08 西北师范大学 Method for extracting silver and lead from smelting slag generated by pyrogenic process treatment of copper anode mud
CN103243222A (en) * 2013-04-24 2013-08-14 中南大学 Modified lime sulphur and application thereof in gold leaching technology
CN103243222B (en) * 2013-04-24 2014-04-09 中南大学 Modified lime sulphur and application thereof in gold leaching technology
CN103555949A (en) * 2013-07-16 2014-02-05 紫金矿业集团股份有限公司 Method for recovering gold from low concentration gold-containing wastewater under high salinity high chlorine system
CN103555949B (en) * 2013-07-16 2015-09-02 紫金矿业集团股份有限公司 Contain the method for gold recovering golden waste water from lower concentration under high salinity high chlorine system
CN104862494A (en) * 2015-05-05 2015-08-26 中南大学 Gold leaching process from sulfide gold mine
CN105344485A (en) * 2015-10-16 2016-02-24 中南大学 Method for recycling gold and interlocked mass of gold from refractory gold ore based on sulfur-oil aggregative flotation
CN105344485B (en) * 2015-10-16 2018-03-02 中南大学 The method for reclaiming gold and its intergrowth from difficult-treating gold mine based on sulphur oil aggregative flotation
CN106167857A (en) * 2016-06-24 2016-11-30 中国科学院过程工程研究所 A kind of comprehensive cleaning reclaims gold, carbon, sulfur and the method for element silicon in Carbonaceous gold ore
CN106167857B (en) * 2016-06-24 2019-01-08 中国科学院过程工程研究所 A kind of method that gold, carbon, sulphur and element silicon in Carbonaceous gold ore are recycled in comprehensive cleaning
CN111088435A (en) * 2019-11-01 2020-05-01 新疆金川矿业有限公司 Lime sulfur mixture, preparation method thereof and use method thereof in gold leaching
CN112067490A (en) * 2020-09-16 2020-12-11 励福(江门)环保科技股份有限公司 Novel gravimetric method for determining gold content in aqua regia

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