CN212293695U - System for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid - Google Patents
System for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid Download PDFInfo
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- CN212293695U CN212293695U CN202020432639.8U CN202020432639U CN212293695U CN 212293695 U CN212293695 U CN 212293695U CN 202020432639 U CN202020432639 U CN 202020432639U CN 212293695 U CN212293695 U CN 212293695U
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Abstract
The invention belongs to the field of gold production, and particularly relates to a system for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolytic waste liquid. The utility model discloses a to the combined gold charcoal high temperature high pressure desorption electrolysis production gold technology of carrying of full mud cyaniding charcoal thick liquid, propose a graininess gold mud, garrulous charcoal, gold, silver and copper complex ion in the electrolytic waste liquid of high temperature high pressure desorption, realize the system of gold, silver and copper in the safe high-efficient recovery waste liquid.
Description
Technical Field
The invention provides a system for safely and efficiently recovering gold, silver and copper in waste liquid by desorbing granular gold mud, broken carbon and gold, silver and copper complex ions in electrolytic waste liquid at high temperature and high pressure aiming at a process for producing gold by combining all-mud cyanided carbon slurry with gold-loaded carbon through high-temperature and high-pressure desorption electrolysis.
Background
The existing traditional high-silver copper gold-loaded carbon high-temperature high-pressure desorption electrolysis waste liquid treatment process has the following defects:
1. the waste liquid is returned to cyaniding and leaching. The method has the disadvantages that the granular gold mud, the crushed carbon and the cyanided gold and silver ions cannot be directly recovered, the process flow is long, the production cost is high, the granular gold mud and the crushed carbon are easy to mix and precipitate with the carbon mud in a return water tank, and the metal loss exists.
2. The zinc powder directly replaces and recovers the gold, the silver and the copper. The method has the disadvantages that acid is added to adjust the PH before replacement, the acid reacts with cyanide to easily generate toxic hydrogen cyanide gas, the operation environment is severe, the potential safety hazard of hydrogen cyanide gas poisoning exists, the metal recovery rate is low, and the later smelting operation is influenced by carbon mud and broken carbon contained in replacement precipitates.
3. And (4) reducing thiourea dioxide. The method has the disadvantages that the reduction precipitate contains carbon mud and broken carbon, the production operation is complex, and the recovery rate of copper is low. The solution after reduction needs to return to the cyaniding leaching process, which influences the adsorption operation of the activated carbon.
Disclosure of Invention
In the gold production process by combining all-mud cyanide carbon slurry with gold-loaded carbon through high-temperature high-pressure desorption electrolysis, because the gold-loaded carbon has high silver and copper grades, desorption electrolysis pipelines are blocked, and gold mud of an electrolysis bath overflows the bath, so that desorption electrolysis waste liquid is entrained with partial fine granular gold mud and crushed carbon, the waste liquid contains high-concentration gold cyanide, silver and copper complex ions, the waste liquid directly returns to the cyaniding leaching process through a return water tank, the granular gold mud and the crushed carbon are easy to settle in the return water tank, the fine granular gold mud, the crushed carbon and the gold and silver complex ions in the desorption electrolysis waste liquid cannot be efficiently recovered, and the gold and silver desorption smelting rate is low. The system for safely and efficiently recovering gold, silver and copper in the waste liquid is provided aiming at desorbing granular gold mud, broken carbon and gold, silver and copper complex ions in the electrolytic waste liquid at high temperature and high pressure.
The specific technical scheme is as follows: a system for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid is characterized in that a desorption column pressure relief pipe, an electrolysis bath pressure relief pipe and a nitrogen oxide exhaust pipe are arranged on a liquid preparation tank, and a drain pipe of the liquid preparation tank is arranged at the bottom of the liquid preparation tank; the liquid preparation tank is connected with the upper end of a conical waste liquid collecting tank through a desorption waste liquid conveying pump and a desorption waste liquid conveying pipe, the top of the conical waste liquid collecting tank is connected with an electric liquid circulating pipe, the bottom of the conical waste liquid collecting tank is provided with a crushed carbon and electrodeposition waste liquid discharging pipe and a desorption waste liquid discharging pipe, the upper end of the desorption waste liquid discharging pipe is provided with a flower pipe and extends into the conical waste liquid collecting tank, the flower pipe is partially wrapped by a 20-mesh stainless steel screen, a cuboid electrodeposition tank is arranged below the conical waste liquid collecting tank, and a negative plate is arranged in the electrodeposition tank, the anode plate, the outlet of the desorption waste liquid outlet pipe is directly inserted to the position which is 10cm away from the bottom surface of the electrowinning cell, the tail end of the electrowinning cell is provided with an electrowinning barren solution overflow pipe, the liquid outlet of the electrowinning barren solution overflow pipe is provided with a gold mud precipitation transfer pot, a waste gas collecting cover is arranged above the electrowinning cell, and the waste gas collecting cover is connected with the outside through an exhaust pipe and a fan; the gold mud sedimentation transfer tank is connected with a transfer tank lean solution overflow pipe through an electric accumulation liquid circulating pump, and an outlet of the electric accumulation liquid circulating pump is connected with an electric accumulation liquid circulating pipe; a pipeline of the system is provided with a high-temperature resistant alkali resistant stainless steel flange ball valve.
Has the advantages that: the invention aims at the gold production process by combining all-mud cyanide carbon slurry with gold-loaded carbon through high-temperature high-pressure desorption electrolysis, because the gold-loaded carbon has high silver and copper grades, desorption electrolysis pipelines are blocked, and gold mud of an electrolysis bath overflows the bath, so that desorption electrolysis waste liquid is entrained with partial fine granular gold mud and crushed carbon, the waste liquid contains high-concentration gold cyanide, silver and copper complex ions, the waste liquid directly returns to the cyaniding leaching process through a return water tank, the granular gold mud and the crushed carbon are easy to settle in the return water tank, the fine granular gold mud, the crushed carbon and the gold and silver complex ions in the desorption electrolysis waste liquid cannot be efficiently recovered, and the gold and silver desorption smelting rate is low.
The system for safely and efficiently recovering gold, silver and copper in the waste liquid is provided aiming at desorbing granular gold mud, broken carbon and gold, silver and copper complex ions in the electrolytic waste liquid at high temperature and high pressure.
Firstly, desorbing the electrolytic waste liquid, transferring the electrolytic waste liquid to a conical waste liquid collecting tank through a liquid preparation tank, naturally settling crushed carbon in the waste liquid at the bottom of the waste liquid collecting tank, and finally discharging and recycling the crushed carbon and the electrodeposition waste liquid from a bottom valve of a waste liquid discharging pipe; secondly, part of granular gold mud carried in the waste liquid is subjected to secondary natural precipitation treatment in an electrodeposition tank and a precipitation transfer tank, the precipitate is subjected to liquid-solid separation in a crushed carbon and gold mud suction filter tank, filter cake gold mud is returned to be purified and refined, gold and silver complex are produced, and the filtrate enters a cyanidation tank; and during electrodeposition, gold and silver copper metal obtains electrons at the cathode steel wool of the electrolytic bath, and the electrons are reduced into metal simple substances and are deposited on the cathode steel wool to form gold mud. And (3) periodically taking gold mud for operation, returning the gold mud to be purified and refined after vacuum filtration and dehydration to produce gold, silver and sponge copper, and feeding the filtrate into a cyanidation tank.
Drawings
FIG. 1 is a system diagram of the desorption and electrolysis of waste liquid from gold-carrying carbon with high silver and copper content for recovering gold, silver and copper;
wherein, 1-a sewage discharge pipe of the liquid preparation tank; 2-liquid preparation tank; 3-desorption column pressure relief pipe; 4-pressure relief pipe of the electrodeposition tank; 5-air exhaust pipe of liquid preparation tank; 6-desorption waste liquid delivery pump; 7-desorption waste liquid conveying pipe; 8-a conical waste liquid collection tank; 9-electric liquid circulating pipe; 10-carbon crushing and electrodeposition waste liquid discharge pipe; 11-exhaust extraction pipe; 12-a fan; 13-crushed charcoal and gold mud suction filter tank; 14-electric liquid circulating pump; 15-transfer pot lean solution overflow pipe; 16-gold mud deposition transfer tank; 17-electrodeposition lean solution overflow pipe; 18-an electrodeposition cell; 19-desorption waste liquid outlet pipe; 20-exhaust gas collection hood.
Detailed Description
The invention aims at desorbing valuable metals of silver and copper in the electrolytic waste liquid by using the high-silver-copper gold-loaded carbon, and realizes safe and efficient recovery. As shown in fig. 1: a desorption column pressure relief pipe 3, an electrolytic tank pressure relief pipe 4 and a nitrogen oxide exhaust pipe 5 are arranged on the liquid preparation tank 2, and a discharge pipe 1 of the liquid preparation tank is arranged at the bottom of the liquid preparation tank 2; the liquid preparation tank 2 is connected with the upper end of a conical waste liquid collecting tank 8 through a desorption waste liquid conveying pump 6 and a desorption waste liquid conveying pipe 7, the top of the conical waste liquid collecting tank 8 is connected with an electric liquid accumulation circulating pipe 9, the bottom of the conical waste liquid collecting tank 8 is provided with a crushed carbon and electrodeposition waste liquid discharging pipe 10 and a desorption waste liquid discharging pipe 19, the upper end of the desorption waste liquid discharging pipe 19 is provided with a flower pipe and extends into the conical waste liquid collecting tank 8, the flower pipe part is wrapped by a 20-mesh stainless steel screen, so that the crushed carbon and the waste liquid in the electrolysis waste liquid are separated, and the crushed carbon and the waste liquid are prevented from flowing to an electro; the perforated pipe is a perforated pipe.
A cuboid electrodeposition tank 18 is arranged below the conical waste liquid collecting tank 8, a cathode plate and an anode plate are arranged in the electrodeposition tank, an outlet 19 of a desorption waste liquid outlet pipe is directly inserted to a position, which is 10cm away from the bottom surface, of the electrodeposition tank, an electrodeposition lean liquid overflow pipe 17 is arranged at the tail end of the electrodeposition tank, a gold mud sedimentation transfer tank 16 is arranged at a liquid outlet of the electrodeposition lean liquid overflow pipe, a waste gas collecting cover 20 is arranged above the electrodeposition tank 18, and the waste gas collecting cover 20 is connected with the outside through an exhaust pipe 11 and a fan 12; the gold mud sedimentation transfer tank 16 is connected with a transfer tank barren liquor overflow pipe 15 through an electric effusion circulating pump 14, and the outlet of the electric effusion circulating pump 14 is connected with an electric effusion circulating pipe 9; a pipeline of the system is provided with a high-temperature resistant alkali resistant stainless steel flange ball valve. The main equipment and the pipeline of the system are designed according to the treatment capacity of desorption waste liquid and the amount of gold, silver and copper metals contained in the waste liquid. The outside is separately provided with a crushed carbon and gold mud suction filter tank 13 which is used as liquid-solid separation and separation equipment for the recovered crushed carbon, granular gold mud and gold mud.
Principle of operation
In the high-temperature high-pressure desorption electrolysis production process of the high-silver and copper gold-loaded carbon, due to production abnormity, desorption electrolysis pipelines are blocked, and gold mud is easy to overflow a groove, so that waste liquid contains partial fine granular gold mud, broken carbon and high-concentration gold, silver and copper cyanide complex ions after desorption electrolysis.
1. Crushed carbon recovery
The desorption waste liquid after each batch of gold-loaded carbon desorption electrolysis is discharged from a desorption column pressure relief pipe 3 and an electrolytic bath pressure relief pipe 4 to a liquid preparation tank 2, and the abnormal production waste liquid contains part of fine granular gold mud, crushed carbon and high-concentration cyanide gold-silver complex ions; carry the waste liquid to toper waste liquid collection tank 8 through desorption waste liquid conveyer pipe 7 by desorption waste liquid delivery pump 6, the nature is deposited and is handled, according to the big characteristic of garrulous charcoal density, garrulous charcoal deposits in waste liquid collection tank bottom, treats that the waste liquid electrodeposition is finished, and the garrulous charcoal that the bottom was deposited discharges to garrulous charcoal and gold mud suction filtration groove 13 from garrulous charcoal and electrodeposition waste liquid discharge pipe 10 and carries out the liquid-solid separation, and the garrulous charcoal of filter cake returns to purify to smelt and retrieve, and the filtrating goes into the cyanylation groove.
2. Recovery of granular gold mud
The desorption waste liquid in the conical waste liquid collecting tank enters the electrodeposition tank from a desorption waste liquid outlet pipe 19 for electrodeposition, and the desorption waste liquid is continuously circulated among the waste liquid collecting tank 8, the electrodeposition tank 18 and the gold mud precipitation transfer tank 16 during electrodeposition; the granular gold mud and the desorption waste liquid are circulated together, the granular gold mud is subjected to secondary natural precipitation treatment through an electrowinning tank 18 and a gold mud precipitation transfer tank 16, the granular gold mud is naturally precipitated at the bottoms of the electrowinning tank and the gold mud precipitation transfer tank, the precipitate is subjected to liquid-solid separation in a crushed carbon and gold mud suction filter tank, the filter cake gold mud is returned to be purified, the gold mud of the alloy and the silver are produced, and the filtrate enters a cyanidation tank.
3. Complex ion electrodeposition of cyanided gold, silver and copper
The gold-silver complex ion cyanide electrodeposition is carried out in the electrodeposition tank 18, the electrodeposition liquid is gold-silver-copper complex ion waste liquid, the waste liquid circulates among the waste liquid collecting tank 8, the electrodeposition tank 18 and the gold mud precipitation transfer tank 16, the cathode adopts a stainless steel wire mesh, the anode adopts a stainless steel plate, the polar plate is arranged in the polypropylene electrodeposition tank 18, direct current voltage stabilization electricity is conducted to carry out electrodeposition and recover gold, silver and copper, during electrodeposition, gold, silver and copper metal obtain electrons at the cathode steel wool of the electrolytic tank and are reduced into metal simple substances, and the gold and silver metal deposits on the cathode steel wool to form gold mud. And (4) periodically taking gold mud for operation, and returning the gold mud to be purified and refined after vacuum filtration and dehydration to produce gold, silver and sponge copper. The filtrate enters a cyanidation tank.
The system has high recovery rate of gold, silver and copper, safety, low production cost and low labor intensity.
Claims (1)
1. A system for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid is characterized in that a desorption column pressure relief pipe, an electrolysis bath pressure relief pipe and a nitrogen oxide exhaust pipe are arranged on a liquid preparation tank, and a drain pipe of the liquid preparation tank is arranged at the bottom of the liquid preparation tank; the liquid preparation tank is connected with the upper end of a conical waste liquid collecting tank through a desorption waste liquid conveying pump and a desorption waste liquid conveying pipe, the top of the conical waste liquid collecting tank is connected with an electric liquid circulating pipe, the bottom of the conical waste liquid collecting tank is provided with a crushed carbon and electrodeposition waste liquid discharging pipe and a desorption waste liquid discharging pipe, the upper end of the desorption waste liquid discharging pipe is provided with a flower pipe and extends into the conical waste liquid collecting tank, the flower pipe is partially wrapped by a 20-mesh stainless steel screen, a cuboid electrodeposition tank is arranged below the conical waste liquid collecting tank, and a negative plate is arranged in the electrodeposition tank, the anode plate, the outlet of the desorption waste liquid outlet pipe is directly inserted to the position which is 10cm away from the bottom surface of the electrowinning cell, the tail end of the electrowinning cell is provided with an electrowinning barren solution overflow pipe, the liquid outlet of the electrowinning barren solution overflow pipe is provided with a gold mud precipitation transfer pot, a waste gas collecting cover is arranged above the electrowinning cell, and the waste gas collecting cover is connected with the outside through an exhaust pipe and a fan; the gold mud sedimentation transfer tank is connected with a transfer tank lean solution overflow pipe through an electric accumulation liquid circulating pump, and an outlet of the electric accumulation liquid circulating pump is connected with an electric accumulation liquid circulating pipe; a pipeline of the system is provided with a high-temperature resistant alkali resistant stainless steel flange ball valve.
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| CN202020432639.8U CN212293695U (en) | 2020-03-30 | 2020-03-30 | System for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid |
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| CN202020432639.8U CN212293695U (en) | 2020-03-30 | 2020-03-30 | System for recovering gold, silver and copper from high-silver-copper gold-loaded carbon desorption electrolysis waste liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652554A (en) * | 2021-07-16 | 2021-11-16 | 武汉理工大学 | Method for recovering noble metal in solution based on capacitive deionization technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652554A (en) * | 2021-07-16 | 2021-11-16 | 武汉理工大学 | Method for recovering noble metal in solution based on capacitive deionization technology |
| CN113652554B (en) * | 2021-07-16 | 2022-12-27 | 武汉理工大学 | Method for recovering noble metal in solution based on capacitive deionization technology |
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