CN102286663B - Treatment method of copper-containing gold mud - Google Patents
Treatment method of copper-containing gold mud Download PDFInfo
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- CN102286663B CN102286663B CN2011102393162A CN201110239316A CN102286663B CN 102286663 B CN102286663 B CN 102286663B CN 2011102393162 A CN2011102393162 A CN 2011102393162A CN 201110239316 A CN201110239316 A CN 201110239316A CN 102286663 B CN102286663 B CN 102286663B
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Abstract
A copper-containing gold mud treatment method relates to copper-containing gold (silver or gold-silver) mud, in particular to a comprehensive recovery treatment method of high copper-containing gold (silver or gold-silver) mud obtained by zinc powder replacement in the gold production process. The method is characterized in that the treatment process comprises the following steps: (1) drying the copper-containing gold mud and gold mud, and smelting to obtain copper-gold alloy and smelting slag; (2) casting the smelted copper-gold alloy into an anode for electrolysis to obtain cathode copper; (3) after smelting to obtain smelting slag and grinding, cyaniding and leaching to recover gold and silver; (4) drying the anode mud obtained in the step (2), and adding a slag former to carry out smelting to obtain a gold ingot and smelting slag; (5) and after the smelting slag obtained by smelting is ground, cyaniding leaching is carried out to recover gold and silver. According to the method, through integrated innovation, acid dissolution copper removal in the treatment process of the high-copper-content gold mud is omitted, and meanwhile, an electrolytic copper removal link is added, so that zero discharge of wastewater is realized, chemicals such as sulfuric acid are not consumed, and electrolytic copper and gold ingots are obtained.
Description
Technical field
A kind of cupric gold mud treatment process relates to the comprehensive recovery and treatment method of the higher gold of cupric (silver, or gold and silver mud) that a kind of cupric gold (silver, or gold and silver) mud, particularly gold production process zinc dust precipitation obtains.
Technical background
At present, the refining of gold mud has kinds of processes both at home and abroad, and refinery practice is selected according to different situations such as material characteristic, technical foundation and the market requirements with suiting measures to local conditions by each producer.Conclude and get up to mainly contain following several method: the wet method melting and the wet method pyrogenic process combined process flow of the pyrometallurgical smelting of gold, gold.
Thermal process generally comprises oven dry-melting.Stoving oven is dry, and batch mixing fusion slag making obtains ingot.The advantage of this method is that flow process is simple, less investment; But the quantity of slag is big, and the recovery is low, and particularly during the higher gold mud of Treatment of Copper, copper and gold form alloy and be difficult to slag making and remove, and reduce the grade of ingot, influence the ingot quality, and copper are without charge in ingot, the uncomprehensive recovery of copper.
The wet method melting technology generally is at first to use sulfuric acid copper removal, zinc, reclaims copper zinc; Leach silver, villaumite precipitated silver (or ammonia soaks separation of Silver after the oxidation) with nitric acid then; Slag chlorinating dissolution gold after the separation of Silver, the lysate reduction obtains bronze.This process characteristic is that industrial scale is changeable, and is with short production cycle, unleaded evil, and general gold recovery can reach 99%; Shortcoming is that the technology continuity is strong, and production management requires high, and the filtration washing trouble needs support equipment, long flow path, and complex equipments, this method also are applicable to the goldmud from cyanide processing that Treatment of Copper is high, just need when sulfuric acid copper removal, dezincification, will add oxygenant.
It also is a kind of of wet processing that automatically controlled chloridized gold mud and chlorination are handled gold mud.Automatically controlled chlorination nineteen fifty is applied to Ka Erguli mining company, China's CONTROLLED POTENTIAL chlorination success of the test in 1984.Can access the gold that contains gold 99.99, the leaching yield of Cu, Pb, Zn is all more than 99%, but the logical chlorine of this technology, production environment difference and harsh to the equipment anticorrosion requirement.
Wet method and pyrogenic process process integration, wet method and pyrogenic process unite the meliority that its technology is arranged, but flow process is long, complex equipments.
Summary of the invention
The object of the invention is exactly to the problem that exists in the above-mentioned prior art, provides that a kind of metal separation is thorough, the recovery is high, adaptability to raw material is strong, the treatment process of the cupric gold mud that technical process is brief, energy consumption is low, good operational environment and water loss are few.
The objective of the invention is to realize through following technical scheme.
A kind of treatment process of cupric gold mud is characterized in that the step of its treating processes comprises:
(1) the cupric gold mud is carried out drying adding slag former and carry out melting, the slag former composition is borax, yellow soda ash, silica sand, nitre, fine coal, obtains copper-gold alloy and smelting slag;
(2) copper-gold alloy that step (1) melting is obtained is cast anode and is carried out electrolysis, and electrolysis obtains cathode copper;
(3) step (1) melting is obtained smelting slag and carries out ore grinding after, return the cyaniding leaching section and leach the recovery gold and silver again, contain the zero release of gold and silver smelting slag;
(4) anode sludge with step (2) carries out drying, and the adding slag former carries out melting and obtains ingot and a small amount of smelting slag;
(5) after the smelting slag that obtains of the melting of step (4) carries out ore grinding, return the cyaniding leaching section and leach the recovery gold and silver again, contain the zero release of gold and silver smelting slag.
The treatment process of a kind of cupric gold mud of the present invention is characterized in that described cupric gold mud is copper bearing goldmud from cyanide processing, and copper content is 7% ~ 80%.
The treatment process of a kind of cupric gold mud of the present invention, the bake out temperature that it is characterized in that described drying process is 200 ℃ ~ 500 ℃, be 6 ~ 12 hours time of drying, is dried to contain weight water less than 3%.
The treatment process of a kind of cupric gold mud of the present invention is characterized in that the slag former composition that its step (1) adds is borax, yellow soda ash, silica sand, nitre, fine coal, under reducing atmosphere, carries out melting.
A kind of cupric gold mud treatment process of the present invention is characterized in that described melting slag making and anode sludge refining unit are intermediate frequency furnace, and frequency is: 1000 ~ 2000Hz;
A kind of cupric gold mud treatment process of the present invention is characterized in that the bath composition Cu of the electrolytic process of described step (2)
2+Be 40 ~ 55g/L, free sulfuric acid is 150 ~ 220 g/L; The bath voltage of electrolyzer is 0.24 ~ 0.35V, cathode area electric current 220 ~ 330A/m
2
A kind of cupric gold mud treatment process of the present invention on the basis of pyrometallurgical smelting, is improved the melting slagging process; The cupric gold mud is without pickling copper removal, dezincification; Directly the intermediate frequency furnace melting is advanced in oven dry, and copper is not oxidized and get into alloy phase under the weakly reducing atmosphere, and zinc gets into the slag phase; Alloy phase is built into positive plate, the electrolysis production cathode copper, and anolyte adopts impurity such as galvanic deposit arsenic removal, antimony and bismuth, and the galvanic deposit throw out focuses on.Anolyte reuse after the processing, positive plate anode scrap return intermediate frequency furnace again melting build positive plate; The filtration of the electrolysis gained anode sludge, oven dry, intermediate frequency furnace refining obtain highly purified ingot.
The present invention saves oxidation in the high cupric gold mud treating processes-acidleach copper removal workshop section through integrated innovation, increases electrolysis copper removal link, water zero discharge, and the smelting slag zero release significantly reduces the sulfuric acid reagent consumption, and obtains the electrolytic copper product.
Method of the present invention, compared following advantage with existing cupric gold mud treatment process: (1) technical process is short, does not produce copper ashes, directly obtains the electrolytic copper product; (2) content to copper in the raw material gold mud has very big flexibility; (3) gold mud dissolves without peracid, and consume water is not saved the sulfuric acid reagent consumption, has reduced the link of corrosion on Equipment, is fit to the lack of water dry and uses this technology; (4) electrolyte content is few, adopts galvanic deposit to purify anolyte, reduces loaded down with trivial details recovery system, and flow process is short, and reagent consumption is few, invests little; Purify back electrolytic solution reuse and reach wastewater zero discharge, meet the national environmental protection policy.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method.
Embodiment
A kind of cupric gold mud treatment process, its treating processes are that the cupric gold mud is dry, add the slag former batch mixing, and the big ear positive plate of gold containing material is built in the melting slag making, and positive plate electrolysis copper removal, the anode sludge of acquisition carry out the process that the melting slag making obtains ingot.
The concrete operations step is:
1. high cupric gold mud is without roasting oxidation, pickling, and directly the melting slag making becomes the gold containing material positive plate, and electrolysis obtains cathode copper, and electrolytic solution returns electrolysis after treatment; Positive plate is cast in the slag making of adopting electrolysis residual pole Returning smelting.The anode sludge goes filtration, oven dry, melting slag making operation.
2. high cupric gold mud is placed in the box-type drying stove, 200 ~ 500 ℃ of drying temperatures; 6 ~ 12 hours time of drying, water ratio is controlled at below 3%, opens the flue dust cover at drying oven top in the drying process and collects the airborne dust in the operating process.
3. according to the ratio of dried gold mud composition adjustment slag former, batch mixing is opened dust collection cover and blower fan and is collected dust in the batch mixing process, mixes the back bank and exists in the hopper.
4. with the gold mud siccative of proportional mixing, slowly add intermediate frequency furnace, fusing of margin refining limit replenishes powder, opens dust collection cover simultaneously and gathers dust.After skimming the upper strata slag, adopting electrolysis residual pole is put into intermediate frequency furnace heavily melt, the fusion copper-bearing alloy waters and builds up big ear positive plate, and slag returns ore grinding cyaniding leaching section, further reclaims the precious metal in the slag.The copper-bearing alloy positive plate removes electrowinning process.
5. bath composition Cu
2+Be 40 ~ 55g/L, free sulfuric acid is 150 ~ 220 g/L.The bath voltage of electrolyzer is 0.24 ~ 0.35V, cathode area electric current 220 ~ 330A/m
2, negative electrode adopts permanent cathode, obtains the cathode copper product and the anode sludge.
6. the anode sludge after the collection electrolysis through filtering, is filtrated and is returned the electrolysis cycle groove, and the gained filter cake repeats 2,3 steps; The melting of gained multilayer anode mud material intermediate frequency furnace obtains than fine bullion.
The total recovery of this technical process gold reaches 99 ﹪, and can directly obtain the cathode copper product.
Embodiment 1
This method between the gold and silver recovery vehicle of this factory, has been used in geographic certain the copper zinc ore dressing-works of Saudi Arabia Nai Jilan.The gold mud that unloads the zinc dust precipitation pressure filter after the cake is contained in the container, hangs the Stall working chamber with cantilever then and stores up, and gold mud staple (%) Cu 46.9, Zn 40.5, Au 10.8 are stored in the stainless steel trough of size (mm) 2000x1000x500.Loft drier adopts RT2-45-9 pallet car type stoving oven, rated output 45kw, 950 ℃ of temperature ratings, working spaces's size (mm) 1200x600x400.Gold mud is placed in the Stainless Steel Disc, and there is plate rail stoving oven inside.After gold mud is dried in stove, moisture＜3%.During stoving oven work, open the induced draft fan exhausting, induced draft fan power 5kw enters atmosphere behind the induced draft blower withdraws room air process moisture film cyclone dust.
Dried gold mud mixes with slag former in mixer, once can stir 150kg, mixture homogeneity relative deviation＜4%, 15 minute, suitable particulates 20 ~ 500 orders, power of motor 5.5kw, rotating speed 51rpm.
Go the intermediate frequency furnace melting behind the batch mixing, the intermediate frequency furnace parameter: rated output 160kw, output voltage of intermediate frequency 750V; Output DC 260A, inverter output frequency 1250H, crucible volume 30L; 1650 ℃ ~ 1700 ℃ of work top temperatures, smelting time 40 ~ 60 minutes, gold and silver refining ingot casting 20 ~ 30 minutes.Before intermediate frequency furnace is opened, logical water coolant (water coolant double loop), affirmation intermediate frequency furnace mould material is beaten and is finished; Reinforced in intermediate frequency furnace, open intermediate frequency furnace, fusing of margin refining slag making limit is reinforced; Remove top slag after having refined a stove gold mud, be cast into positive plate.The long 685mm of positive plate size (containing hanger), wide 450mm; Place in the diaphragm for electrolytic cell bag homopolarity width between centers 200mm, cathode current density 215A/m
2, bath voltage 0.2～0.3V, solution circulated speed: 21.5L/min, circulation fluid sulfuric acid concentration: 200g/L, Cu2+/concentration: 40g/L, 19 of each electric tank cathodes, 20 on anode.
General about 8 days of electrolysis time obtains cathode copper; The positive plate anode scrap is ingot casting again, and electrolytic solution is handled the back reuse, and the anode sludge dewaters in the equipment of filtering earlier, and gained filtrating is returned electrolyzer, and filter cake repeats the oven dry of front, obtains purer ingot in the intermediate frequency furnace refining then.
Claims (7)
1. the treatment process of a cupric gold mud is characterized in that the step of its treating processes comprises:
(1) the cupric gold mud is carried out drying after, add slag former and carry out melting and obtain copper-gold alloy and smelting slag;
(2) copper-gold alloy that step (1) melting is obtained is cast anode and is carried out electrolysis, and electrolysis obtains cathode copper;
(3) step (1) melting is obtained the smelting slag ore grinding after, return the cyaniding leaching section and leach the recovery gold and silver again;
(4) anode sludge with step (2) carries out drying, and the adding slag former carries out melting and obtains ingot and smelting slag;
(5) after the smelting slag that obtains of the melting of step (4) carries out ore grinding, return the cyaniding leaching section and leach the recovery gold and silver again.
2. the treatment process of a kind of cupric gold mud according to claim 1 is characterized in that described cupric gold mud is copper bearing goldmud from cyanide processing, and copper content is 7% ~ 80%.
3. the treatment process of a kind of cupric gold mud according to claim 1 is characterized in that the bake out temperature of the drying process of described step (1) and step (4) is 200 ℃ ~ 500 ℃, and be 6 ~ 12 hours time of drying, is dried to contain weight water less than 3%.
4. the treatment process of a kind of cupric gold mud according to claim 1 is characterized in that the slag former composition that its step (1) adds is borax, yellow soda ash, silica sand, nitre, fine coal, under reducing atmosphere, carries out melting.
5. a kind of cupric gold mud treatment process according to claim 1 is characterized in that described fusion process adopts intermediate frequency furnace, and frequency is: 1000 ~ 2000Hz.
6. a kind of cupric gold mud treatment process according to claim 1, the cupric gold mud that it is characterized in that described step (1) are directly dried laggard intermediate frequency furnace melting slag making without oxidation-acidleach copper removal, dezincification.
7. a kind of cupric gold mud treatment process according to claim 1 is characterized in that the bath composition Cu of the electrolytic process of described step (2)
2+Be 40 ~ 55g/L, free sulfuric acid is 150 ~ 220 g/L; The bath voltage of electrolyzer is 0.24 ~ 0.35V, cathodic current 220 ~ 330A/m
2
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102703927A (en) * | 2012-06-18 | 2012-10-03 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Method for recovering silver from smelted furnace slag |
| CN104928476B (en) * | 2015-02-05 | 2017-08-04 | 青岛科技大学 | A kind of processing method of cobalt-copper alloy Water Quenching Slag |
| CN104878212A (en) * | 2015-04-30 | 2015-09-02 | 鹤庆北衙矿业有限公司 | Method and system for treating gold-containing slag |
| JP6522558B2 (en) * | 2015-07-17 | 2019-05-29 | パンパシフィック・カッパー株式会社 | Method of processing sludge-like raw material |
| CN109055715B (en) * | 2018-08-23 | 2020-06-12 | 灵宝金源矿业股份有限公司 | Multi-element comprehensive recovery process for gold refining acidic wastewater |
| CN110724827A (en) * | 2019-10-23 | 2020-01-24 | 金川集团股份有限公司 | Method for enriching precious metals from sponge copper leaching residues |
| CN115058596A (en) * | 2022-06-06 | 2022-09-16 | 青海大柴旦矿业有限公司 | Efficient treatment and recovery method for smelting slag |
| CN115449633A (en) * | 2022-08-19 | 2022-12-09 | 浙江遂昌汇金有色金属有限公司 | Anode mud smelting device and anode mud smelting process |
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| CN1047888A (en) * | 1989-06-03 | 1990-12-19 | 中国有色金属工业总公司昆明贵金属研究所 | A kind of method of lead anode slurry wet processing |
| CN101451190A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Novel method for separating gold and silver from gold mud |
| CN101597690A (en) * | 2009-06-20 | 2009-12-09 | 永兴县元泰应用材料有限公司 | The method of recycling multiple precious metals from anode mud |
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- 2011-08-19 CN CN2011102393162A patent/CN102286663B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047888A (en) * | 1989-06-03 | 1990-12-19 | 中国有色金属工业总公司昆明贵金属研究所 | A kind of method of lead anode slurry wet processing |
| CN101451190A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Novel method for separating gold and silver from gold mud |
| CN101597690A (en) * | 2009-06-20 | 2009-12-09 | 永兴县元泰应用材料有限公司 | The method of recycling multiple precious metals from anode mud |
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Effective date of registration: 20170712 Address after: 100160 Beijing City, South West Fourth Ring Road, Fengtai District, No. 188 headquarters base area, building eighteen, No. 23 Co-patentee after: XUZHOU BGRIMM METAL RECYCLING INSTITUTE Patentee after: BEIJING GENERAL Research Institute OF MINING AND METALLURGY Address before: 100044, Beijing, Xicheng District, Xizhimen foreign Hing Street, No. 1 Patentee before: BEIJING GENERAL Research Institute OF MINING AND METALLURGY |
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Address after: 100160 No. 23 Building, 18 District, Headquarters Base, 188 South Fourth Ring West Road, Fengtai District, Beijing Patentee after: Mining and Metallurgical Technology Group Co.,Ltd. Patentee after: JIANGSU BGRIMM METAL RECYCLING SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 100160 No. 23 Building, 18 District, Headquarters Base, 188 South Fourth Ring West Road, Fengtai District, Beijing Patentee before: BEIJING GENERAL Research Institute OF MINING AND METALLURGY Patentee before: XUZHOU BGRIMM METAL RECYCLING INSTITUTE |
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