CN102021340A - Deep impurity removal technology for coarse gold powder - Google Patents
Deep impurity removal technology for coarse gold powder Download PDFInfo
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- CN102021340A CN102021340A CN2010105727508A CN201010572750A CN102021340A CN 102021340 A CN102021340 A CN 102021340A CN 2010105727508 A CN2010105727508 A CN 2010105727508A CN 201010572750 A CN201010572750 A CN 201010572750A CN 102021340 A CN102021340 A CN 102021340A
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- hydrolysis
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Abstract
The invention provides a deep impurity removal technology for coarse gold powder, which comprises the following steps: putting the coarse gold powder into a chloridizing leaching reactor according to the liquid-solid ratio of (14-16):1, controlling the acidity of solution to be 3mol/L by adding industrial hydrochloric acid, and leaching by introducing chlorine after the temperature reaches 80-85 DEG C for 10-14 hours; then cooling, discharging and filtering, heating and boiling a filtrate and concentrating the volume to be 25% to 37.5% of the original volume, adding deionized water to the original volume after cooling, stirring for 30-60 minutes, standing for 2 hours and then discharging and filtering; and after hydrolysis, repeatedly operating steps of concentrating, deionized water adding, stirring, standing and filtering to remove impurities by hydrolysis, carrying out gold reduction after 2 to 3 times of hydrolysis treatment, and intensively storing hydrolysis residues. Through the process, the impurity content in the solution not subject to the gold reduction is effectively reduced, and especially the contents of Ag, Sb, Pb and Bi are decreased by 95% or so.
Description
Technical field
The present invention relates to hydrometallurgy process in the field of metallurgy, particularly effectively remove the thick bronze deep impurity-removing technology of the impurity elements such as most of silver-colored and antimony in the thick bronze chlorated liquid.
Background technology
Both at home and abroad thermal process processing copper anode muds that adopt more, my company also was successfully applied to production in 2000 with this technology, mainly be that thick bronze by parting process output is through electrolysis output gold, it is assorted that principle technology is that copper anode mud sulfurization roasting-acidleach divides copper-alkali to soak branch tellurium-chlorination parting-reduce thick bronze-liquid making electrolysis-electrolysis gold plate-boil eccysis, this gold production process is tediously long, impurity element silver is difficult to control in the requirement height, particularly electrolysis gold plate of impurity content in the thick bronze to reducing.Because the significantly rising of impurity element in the copper raw material in recent years, roasting that make to handle copper anode mud is soaked operation and is produced thick bronze quality and obviously descend, being mainly impurity contents such as argentiferous, lead, antimony, bismuth increases, and finally causes the gold product difficult quality of electrolysis output up to standard.For this reason, having adopted a kind of new wet processing to replace electrolytic process that thick bronze is carried out refining principle technology is that removal of impurities is boiled in thick bronze aqueous solution chlorination-oxalic acid reduction-acid, but too high levels owing to silver and antimony in the thick bronze, the bronze quality that restores still can not reach the requirement of GB IC-Au99.99, therefore, the novel process of seeking a kind of thick bronze deep impurity-removing has seemed very urgent.
Summary of the invention
Purpose of the present invention will be eliminated above-mentioned the deficiencies in the prior art and shortcoming exactly, provides a kind of energy can effectively remove the thick bronze deep impurity-removing technology of the impurity elements such as most of silver-colored and antimony in the thick bronze chlorated liquid.
In order to achieve the above object, the invention provides a kind of thick bronze deep impurity-removing technology of a kind of thick bronze deep impurity-removing technology, thick bronze is dropped into chlorination to be leached in the still, the ratio of the volume of liquid-solid ratio 14-16:1(liquid and solid quality, wherein liquid volume unit is for rising, solid masses unit is a kilogram), adding technical hydrochloric acid control solution acidity is 3mol/L, temperature is that 80~85 ℃ of laggard chlorine that work leach, time 10~14h, cooling off blowing then filters, the intensification of above-mentioned filtrate is boiled, concentrate volume to original volume 25%~37.5%, deionized water is mended to the stoste volume in the cooling back, stirs 30~60min, blowing filters after leaving standstill 2h, concentrate-add deionized water-stir-leave standstill after the hydrolysis and filter the repeatable operation like this removal of impurities that is hydrolyzed, can carry out gold and reduce after 2~3 times hydrolysis treatment repeatedly, hydrolysis residue is left concentratedly.
Sb, Bi are amphiprotic substance, and unstable in acidic solution, facile hydrolysis generates precipitation.In hydrolytic process, add deionized water, [H in the solution
+] reduce, the pH value increases, the SbCl in the solution
3, BiCl
3Hydrolysis takes place, and forms flaxen throw out:
SbCl
3+H
2O?SbOCl↓+2HCl
BiCl
3+H
2O?BiOCl↓+2HCl
When chlorination was leached, most Pb entered in the insoluble slag with the insolubles form and separates with Au, but had the Pb of trace in the solution
2+Instability, meeting and water generation hydrolysis, the throw out of formation lead hydroxide:
Pb
2++2H
2O?Pb(OH)
2↓+2H
+
Simultaneously, after adding deionized water, [the Cl in the solution
-] and [AgCl
2 -] reduce, and the former reduction amplitude is bigger, and balance is moved to the left side, AgCl in the chlorated liquid
2 -Be converted into the AgCl white precipitate:
AgCl+?Cl
-?AgCl
2 -
Owing to raise with temperature, the solubleness of silver chloride increases, so hydrolytic process is carried out at normal temperatures.
Through this technology, the content that effectively reduces foreign matter content, especially Ag, Sb, Pb, Bi in the preceding liquid of gold reduction has reduced about 95%.
Beneficial effect of the present invention:
. the invention provides a kind of to the be hydrolyzed technology of deep impurity-removing of thick bronze chloridizing leach solution, the present invention has carried out the deep purifying removal of impurities to refinery practice in the thick bronze and has improved, thick bronze is behind aqueous solution chlorination, adopted the hydrolysis impurity removal process, utilize acidity and ionic concn to change, remove impurity elements such as wherein a large amount of Ag, Pb, Sb, Bi.
. the present invention can make the most of impurity content in the thick bronze chlorated liquid reduce widely, and especially silver reduces more than 95% with antimony; Behind the hydrolysis deep impurity-removing, influence reductive impurity in the chlorated liquid and reduce in a large number, help subsequent handling; Chlorated liquid is purified through reduction again, and directly output meets the gold product of GB IC-Au99.99.
Embodiment
Embodiment 1:
Thick bronze drops into chlorination and leaches in the still, control liquid-solid ratio 14:1, and adding technical hydrochloric acid control solution acidity is 3mol/L, and volume is 800L, and temperature is that 80 ℃ of laggard chlorine that work leach, and time 12h cools off blowing then and filters.Filtrate is changed in the hydrolysis kettle, intensification is boiled, concentrate volume to 200L, cooling mends deionized water to stoste volume 800L, stirs 30min, blowing filters after leaving standstill 2h, liquid changes in the hydrolysis kettle and to concentrate-to add that deionized water-stir-leaving standstill filtration carries out gold reduction after 3 times hydrolysis treatment so repeatedly after the hydrolysis, and hydrolysis residue is left concentratedly, silver, lead, antimony, bi content reduction by 94.2%.
Embodiment 2:
Thick bronze drops into chlorination and leaches in the still, control liquid-solid ratio 15:1, and adding technical hydrochloric acid control solution acidity is 3mol/L, and volume is 800L, and temperature is that 85 ℃ of laggard chlorine that work leach, and time 10h cools off blowing then and filters.Filtrate is changed in the hydrolysis kettle, intensification is boiled, concentrate volume to 300L, cooling mends deionized water to stoste volume 800L, stirs 60min, blowing filters after leaving standstill 2h, liquid changes in the hydrolysis kettle and to concentrate-to add that deionized water-stir-leaving standstill filtration carries out gold reduction after 2 times hydrolysis treatment so repeatedly after the hydrolysis, and hydrolysis residue is left concentratedly, silver, lead, antimony, bi content reduction by 95.1%.
Embodiment 3:
Thick bronze drops into chlorination and leaches in the still, control liquid-solid ratio 16:1, and adding technical hydrochloric acid control solution acidity is 3mol/L, and volume is 800L, and temperature is that 83 ℃ of laggard chlorine that work leach, and time 14h cools off blowing then and filters.Filtrate is changed in the hydrolysis kettle, intensification is boiled, concentrate volume to 260L, cooling mends deionized water to stoste volume 800L, stirs 50min, blowing filters after leaving standstill 2h, liquid changes in the hydrolysis kettle and to concentrate-to add that deionized water-stir-leaving standstill filtration carries out gold reduction after 3 times hydrolysis treatment so repeatedly after the hydrolysis, and hydrolysis residue is left concentratedly, silver, lead, antimony, bi content reduction by 94.7%.
Embodiment 4:
Thick bronze drops into chlorination and leaches in the still, control liquid-solid ratio 14:1, and adding technical hydrochloric acid control solution acidity is 3mol/L, and volume is 800L, and temperature is that 81 ℃ of laggard chlorine that work leach, and time 13h cools off blowing then and filters.Filtrate is changed in the hydrolysis kettle, intensification is boiled, concentrate volume to 220L, cooling mends deionized water to stoste volume 800L, stirs 40min, blowing filters after leaving standstill 2h, liquid changes in the hydrolysis kettle and to concentrate-to add that deionized water-stir-leaving standstill filtration carries out gold reduction after 3 times hydrolysis treatment so repeatedly after the hydrolysis, and hydrolysis residue is left concentratedly, silver, lead, antimony, bi content reduction by 95.3%.
Above-described only is preferred embodiment of the present invention; should be understood that for the person of ordinary skill of the art, under technology enlightenment provided by the present invention, as the common practise of this area; other equivalent modifications and improvement can also be made, also protection scope of the present invention should be considered as.
Claims (1)
1. thick bronze deep impurity-removing technology, it is characterized in that: thick bronze drops into chlorination and leaches in the still, add technical hydrochloric acid control solution acidity and temperature and lead to the chlorine leaching, reacting the postcooling blowing that finishes filters, filtrate is hydrolyzed, heat up then and concentrate, the cooling back is mended deionized water to stoste volume and is stirred, leaving standstill the back blowing filters, concentrate-add deionized water-stir-leave standstill after the hydrolysis and filter the repeatable operation like this removal of impurities that is hydrolyzed, through carrying out the gold reduction after 2~3 times hydrolysis treatment repeatedly, hydrolysis residue is left concentratedly, and specific embodiment and processing parameter are as follows:
A. thick bronze is dropped into chlorination and leach in the still, liquid-solid ratio 14-16:1, adding technical hydrochloric acid control solution acidity is 3mol/L, and temperature is that 80~85 ℃ of laggard chlorine that work leach, and time 10~14h cools off blowing then and filters;
B. filtrate among the step a is heated up and boiled, concentrate volume to original volume 25%~37.5%, deionized water is mended to the stoste volume in the cooling back, stirs 30~60min, leave standstill 2h after blowing filter;
C. carry out the gold reduction behind the repeating step b 2~3 times, hydrolysis residue is left concentratedly.
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CN102021340B CN102021340B (en) | 2013-01-09 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107576754A (en) * | 2017-07-27 | 2018-01-12 | 长春黄金研究院 | A kind of Cupper determination method in thick gold |
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 |
CN110205500A (en) * | 2019-06-18 | 2019-09-06 | 山东黄金冶炼有限公司 | The removal methods of impurity in a kind of reduction bronze |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1442498A (en) * | 2003-04-11 | 2003-09-17 | 山东黄金集团有限公司焦家金矿 | Method of crude gold purification |
CN101570830A (en) * | 2009-06-10 | 2009-11-04 | 宋裕华 | Extraction method of high-purity gold |
-
2010
- 2010-12-04 CN CN2010105727508A patent/CN102021340B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1442498A (en) * | 2003-04-11 | 2003-09-17 | 山东黄金集团有限公司焦家金矿 | Method of crude gold purification |
CN101570830A (en) * | 2009-06-10 | 2009-11-04 | 宋裕华 | Extraction method of high-purity gold |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107576754A (en) * | 2017-07-27 | 2018-01-12 | 长春黄金研究院 | A kind of Cupper determination method in thick gold |
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 |
CN110205500A (en) * | 2019-06-18 | 2019-09-06 | 山东黄金冶炼有限公司 | The removal methods of impurity in a kind of reduction 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 |
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