CN1076401C - Process for preparing gold by reduction of gold-contained chlorated liquid - Google Patents
Process for preparing gold by reduction of gold-contained chlorated liquid Download PDFInfo
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- CN1076401C CN1076401C CN99115343A CN99115343A CN1076401C CN 1076401 C CN1076401 C CN 1076401C CN 99115343 A CN99115343 A CN 99115343A CN 99115343 A CN99115343 A CN 99115343A CN 1076401 C CN1076401 C CN 1076401C
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Abstract
The present invention relates to a method for preparing gold from gold-containing chlorination liquid via reduction, which comprises the steps of neutralization, reduction, washing, ingot casting and the like of gold-containing chlorination liquid. 99.99% gold finished products can be obtained, and a gold powder washing step with ammonia water and an electrolysis step, and therefore, the gold production period is shortened, and the gold refining cost is reduced; the reduction temperature and the washing temperature are low, so energy consumption is reduced; no harmful gas is produced in the reduction, and acid washing water and a part of reduction liquid can be reused; no waste water is discharged, so the present invention is favorable for environment protection; and the composite cost is lower than that of other methods. The method is suitable for processing chlorination gold solutions, the chlorination liquid of gold cyanide slurry and the chlorination liquid of black gold powder produced by a Pb-Cu anode slurry wet method.
Description
The present invention relates to a kind of method that from chlorated liquid, reclaims gold.
The chemical refining of the black gold mud of the wet gold extraction of copper or lead anode slurry, the wet-process refining of goldmud from cyanide processing and silver-colored electrolysis output, traditional method is a chlorination process.Promptly adopt chlorine or alkaline metal chlorate or nitric acid to make golden chlorination and form AuCl
4 -Ion enters solution, employed reductive agent has oxalic acid, sulfurous gas, S-WAT or ferrous ion, and (Lu Yiyuan, Bin Wanda write " precious metals metallurgy ", the 229-230 page or leaf, press of Zhongnan Polytechnic Univ, 1994), but when adopting these reagent reduction, usually cause some base metal impurities to form precipitation and mix, cause the quality of bronze can't reach 99.99% requirement with bronze.For making bronze reach 99.99% requirement, a kind of method is thick bronze to be cast into anode carry out electrolysis, another kind method is that bronze is carried out chlorination earlier, under the acidity conditions of higher, carry out two sections reduction then with sulfurous gas, the bronze of first section output 99.99%, the bronze of second section output returns chlorination (G.B.Harris and R.W.Stanley again, Hydrometallurgicaltreatment of silver refinery anode slime, Edited byU.V.Rao, Proceedings of the Tenth International Precious MetalsInstitute Conference, Lake, Tahoe, Nevada, P233-243,1986).
In order to overcome the above problems, the invention provides a kind of method of producing 99.99% gold medal with hydrogen peroxide direct reduction from golden chlorated liquid.
Solution of the present invention is that the chlorated liquid with gold rises to certain temperature, regulate the pH value with NaOH, make heavy metal ion generation hydrolysis such as antimony, bismuth, lead, after treating the pH value of solution value stabilization, add the reductive agent hydrogen peroxide, with the bronze that obtains and hydrolyzate with hot wash to remove remaining hydrogen peroxide, use the salt acid elution again, liquid after liquid and the partial reduction after the washing of hydrochloric acid is merged the wash water of making chloride slag, and returning chloride process, the bronze behind the salt acid elution becomes 99.99% gold through being washed to neutrality, drying, ingot casting.Details are as follows for detailed process and condition:
1. neutralization.To contain golden chlorated liquid pH value with NaOH and be adjusted to 2.0～3.7, be beneficial to the reduction of gold.Principal reaction has:
Copper and silver do not produce precipitation in N-process, still be retained in the solution.
2 reduction.30～50 ℃ of reduction temperatures, pH value are 2.0～3.7, and the reductive agent hydrogen peroxide is 10～25 times of theory of reduction amount, 4 hours time.After the reduction, bronze hot wash 2 times.The main chemical reactions that reduction process takes place is:
3. washing.Bronze water and technical pure HCl washed twice that reduction obtains, the volume ratio of water and technical pure HCl is 1: 1, and the weight liquid-solid ratio of washings and bronze is 2～8, and temperature is 20～90 ℃, 0.5～2 hour time.The principal reaction of acid cleaning process is:
After the pickling, wash with water to neutrality.
Because hydrogen peroxide has oxidation and reduction both sexes concurrently, the oxidisability that the present invention utilizes hydrogen peroxide to have under higher acidity, liquid after the partial reduction of bronze scrub raffinate and the hydrogen peroxide that contains surplus can be merged the wash water of making chloride slag and return chlorination, with the preparation chlorated liquid.Principal reaction is as follows:
Described hydrogen peroxide is the technical pure hydrogen peroxide of content 27.5%, and hydrochloric acid is technical pure hydrochloric acid.
The present invention is suitable for handling chlorination parting liquid, the chlorated liquid of goldmud from cyanide processing and the chlorated liquid of black gold mud of lead, copper anode mud wet method output.
The present invention and other method of reducing are relatively, following advantage is arranged: 1. gold chlorated liquid hydrogen-peroxide reduction, bronze can obtain 99.99% golden finished product through pickling, washing, casting, has saved bronze ammonia scrubbing and electrowinning process, thereby shortened the golden production cycle, reduced golden refining expense; 2. reduction, wash temperature is low, reduces energy consumption; 3. the no obnoxious flavour of reduction produces, and liquid can return use after acid washing water and the partial reduction, and non-wastewater discharge helps environment protection, and comprehensive cost 4. of the present invention is lower than other method.
Description of drawings:
Fig. 1: schema of the present invention.
Embodiment: the chlorated liquid of Hubei factory anode sludge wet processing, its main component are (g/L) Au:2.38, Ag:0.00329, Cu:3.748, Pb:0.0647, Sb:0.0453, Bi:0.7948
The chlorated liquid 4m of mentioned component
3Pump in the turmeric groove, with steam direct heating to 45 ℃, with the 60Kg industrial caustic soda pH value of solution is adjusted to 3.54, temperature is 50 ℃ at this moment.Add hydrogen peroxide 100Kg, and be incubated 3 hours.Stop to stir, clarification, supernatant liquor is evacuated to storage tank.The underflow suction filtration, bronze is extremely neutral with hot wash.Bronze is inserted and is boiled in the washing trough with 1: the 1HCl washed twice, filter, and on filter cloth washing to neutral.Its composition is (weight %) after the bronze drying:
Au：99.990，Ag：0.00176，Bi：0.00026，Cu：0.00175，Fe：0.00292，Pb：0.00014，Sb：0.00275，
After the routine casting, the composition of ingot is (weight %):
Au:99.995, Ag:0.000255, Bi:0.00015, Cu:0.00122, Fe:0.00029, Pb:0.00039, Sb:0.00016 reaches the requirement of No. 1 gold of GB.Reduction back liquid gold concentration is 2.6mg/L, golden direct yield 99.89%.2m
3Liquid mixes after reduction back liquid and the pickling, and the wash water as chloride slag returns then to chloride process, is warming up to 85 ℃ earlier, reacts 1 hour, adds sodium chlorate again, and the sodium chlorate consumption is than the reduction under the same terms 50%.
Claims (3)
1. produce the method for gold from containing the reduction of golden chlorated liquid for one kind, it is characterized in that: comprise the neutralization that contains golden chlorated liquid, reduction, washing, ingot casting becomes 99.99% gold, and details are as follows for detailed process and condition:
1〉will contain golden chlorated liquid pH value with NaOH and be adjusted to 2.0～3.7,
2〉reduction temperature is 30～50 ℃, and the pH value is 2.0～3.7, and the reductive agent hydrogen peroxide is 10～25 times of theory of reduction amount, 4 hours time, and bronze hot wash 2 times,
3〉the bronze water that obtains of reduction and the mixed solution washed twice of technical pure HCl, the volume ratio of water and technical pure HCl is 1: 1, and the weight liquid-solid ratio of washings and bronze is 2～8, and temperature is 20～90 ℃, 0.5～2 hour time, after the pickling, washes with water to neutrality.
2. method according to claim 1 is characterized in that, liquid merges the wash water of making chloride slag and returns chlorination with the bronze scrub raffinate with after containing the partial reduction of superfluous hydrogen peroxide in the present invention, with the preparation chlorated liquid.
3. method according to claim 1 is characterized in that, described hydrogen peroxide is the technical pure hydrogen peroxide of content 27.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99115343A CN1076401C (en) | 1999-04-22 | 1999-04-22 | Process for preparing gold by reduction of gold-contained chlorated liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99115343A CN1076401C (en) | 1999-04-22 | 1999-04-22 | Process for preparing gold by reduction of gold-contained chlorated liquid |
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| Publication Number | Publication Date |
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| CN1271781A CN1271781A (en) | 2000-11-01 |
| CN1076401C true CN1076401C (en) | 2001-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99115343A Expired - Fee Related CN1076401C (en) | 1999-04-22 | 1999-04-22 | Process for preparing gold by reduction of gold-contained chlorated liquid |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI113667B (en) * | 2002-04-23 | 2004-05-31 | Outokumpu Oy | Method for recovering gold |
| CN102071323B (en) * | 2010-12-16 | 2012-05-23 | 惠州Tcl环境科技有限公司 | Method for producing high-purity gold by utilizing electroplating waste liquid containing gold |
| CN102274978B (en) * | 2011-08-26 | 2013-09-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Method for quickly wet-process refining non-standard coarse gold powder |
| CN105044088B (en) * | 2015-06-08 | 2017-07-28 | 山东黄金冶炼有限公司 | A kind of quick simultaneous measuring method of copper zinc iron content in gold mud |
| CN105483388A (en) * | 2015-12-11 | 2016-04-13 | 励福(江门)环保科技股份有限公司 | Method for gathering noble metal mud in noble-metal-containing acid waste liquid |
| CN106044841A (en) * | 2016-08-17 | 2016-10-26 | 太仓沪试试剂有限公司 | Preparation method of chloroauric acid |
| CN107604176A (en) * | 2017-07-28 | 2018-01-19 | 云南铜业股份有限公司 | A kind of method that high-purity bronze is extracted from copper anode mud and high-purity bronze |
| CN110205500B (en) * | 2019-06-18 | 2021-09-17 | 山东黄金冶炼有限公司 | Method for removing impurities in reduced gold powder |
| CN111299607B (en) * | 2020-04-13 | 2022-06-07 | 紫金矿业集团黄金冶炼有限公司 | Preparation method of 5N-level micron conductive gold ball |
| CN114134333A (en) * | 2021-12-06 | 2022-03-04 | 紫金铜业有限公司 | Gold powder washing and impurity removing process and device |
| CN116652204B (en) * | 2023-07-28 | 2023-10-20 | 长春黄金研究院有限公司 | Spherical gold powder and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161379A (en) * | 1997-01-15 | 1997-10-08 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
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