A gold extraction and regeneration device for gold-loaded carbon

Abstract

This utility model discloses a gold extraction and regeneration device for gold-loaded carbon. The regeneration device includes an aerated carbon extractor, a rich carbon acid washing tank, a desorption column, a lean carbon acid washing tank, and a vibrating screen. The inlet of the aerated carbon extractor is located in the material inside the rich carbon acid washing tank, and the outlet of the aerated carbon extractor is connected to the inlet of the desorption column. The lean carbon outlet of the desorption column is connected to the inlet of the lean carbon acid washing tank, and the outlet of the lean carbon acid washing tank is located above the inlet of the vibrating screen. The regeneration method includes the following steps: (1) rich carbon acid washing; (2) conveying desorption; (3) lean carbon regeneration. Beneficial effects: The gold extraction and regeneration device for gold-loaded carbon disclosed in this utility model ensures that gold and silver are fully separated from activated carbon during the desorption process. It eliminates the need for manual bagging and handling by workers, thereby saving a lot of time and labor costs, greatly improving production efficiency, significantly improving the output efficiency of activated carbon, reducing waiting time and labor costs, improving output quality, and reducing maintenance costs.

Description

Technical Field

[0001] This utility model patent belongs to the field of gold extraction and regeneration technology of gold-loaded carbon, specifically relating to a gold extraction and regeneration device for gold-loaded carbon. Background Technology

[0002] The whole-sludge cyanidation carbon-in-pulp process specifically involves crushing all the gold ore sequentially through a jaw crusher and a cone crusher, then grinding it into slurry using a ball mill, followed by cyanidation leaching, and then using activated carbon to directly adsorb the dissolved gold from the slurry to form gold-loaded carbon (i.e., rich carbon). Finally, gold mud is obtained through desorption and electrolysis.

[0003] However, in low-grade oxidized gold ore treated by heap leaching, there are various elements such as gold, silver, copper, iron, and lead. Except for gold and silver, which have recovery value, other metal elements will affect the leaching and adsorption of gold and silver during the leaching process, resulting in a decrease in the utilization rate of activated carbon. The long leaching time and the long adsorption cycle required for gold-loaded carbon result in a large amount of impurities such as fine mud and alkaline salts being adsorbed. These impurities form a coating on gold and silver complexes, making it impossible to effectively desorb gold and silver during the desorption process, which seriously affects the separation of gold and silver from activated carbon during the desorption process.

[0004] After desorption, the lean carbon needs to be regenerated by acid washing in an acid washing tank. After acid washing, the acid washing solution is first discharged, and then the activated carbon is discharged through the bottom discharge port for reuse in adsorbing dissolved gold. However, the activated carbon after acid washing has problems such as uneven particle size and impurities, which affect the subsequent adsorption of dissolved gold. At the same time, the acid washing solution is discharged from the acid washing tank first, and then the activated carbon is discharged from the discharge port of the acid washing tank, which can easily clog the discharge port, requiring manual unblocking and increasing the labor intensity of employees. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a gold extraction and regeneration device for gold-loaded carbon. The gold extraction and regeneration device and its method provided by this utility model ensure that gold and silver are fully separated from activated carbon during the desorption process, eliminating the need for manual bagging and handling by workers, thereby saving a lot of time and labor costs, greatly improving production efficiency, significantly improving the output efficiency of activated carbon, reducing waiting time and labor costs, improving output quality, and reducing maintenance costs.

[0006] The present invention discloses a gold extraction and regeneration device for gold-loaded carbon, comprising an aerated carbon extractor, a rich carbon acid washing tank, a desorption column, a lean carbon acid washing tank, and a vibrating screen; the inlet of the aerated carbon extractor is located within the material in the rich carbon acid washing tank, and the outlet of the aerated carbon extractor is connected to the inlet of the desorption column; the lean carbon outlet of the desorption column is connected to the inlet of the lean carbon acid washing tank, and the outlet of the lean carbon acid washing tank is positioned above the inlet of the vibrating screen.

[0007] Furthermore, the pneumatic carbon extractor includes a feeding pipe, a collecting chamber, a storage hopper, an air supply pipe, and an air compressor. The bottom end of the feeding pipe is connected to and fixed to the collecting chamber, and an inlet is provided at the bottom of the collecting chamber. The collecting chamber is located within the material in the carbon-rich acid washing tank. The top end of the feeding pipe is connected to and fixed to the storage hopper, and the outlet of the storage hopper is connected to the inlet of the desorption column through a carbon conveying pipe. The outlet end of the air supply pipe is placed in the collecting chamber, and the inlet end of the air supply pipe is connected to the outlet of the air compressor.

[0008] Furthermore, a flared feed pipe is connected to the feed inlet of the collection chamber, and the small-diameter end of the feed pipe is fixedly connected to the feed inlet of the collection chamber.

[0009] Furthermore, the bottom of the storage hopper is inclined, and the top is open, with the discharge port of the storage hopper located at its lowest point; the carbon conveying pipe is inclined downward from the storage hopper to the desorption column.

[0010] Furthermore, it also includes a carbonate-rich washing solution tank, wherein the outlet of the carbonate-rich washing tank is connected to the inlet of the carbonate-rich washing solution tank, and the outlet of the carbonate-rich washing solution tank is connected to the inlet of the carbonate-rich washing tank.

[0011] Furthermore, it also includes a sedimentation tank, wherein the outlet of the undersize material of the vibrating screen is connected to the inlet of the sedimentation tank, and the outlet of the supernatant of the sedimentation tank is connected to the inlet of the lean carbon acid washing tank.

[0012] Another aspect of the technical solution of this utility model discloses a method for gold extraction and regeneration from gold-loaded carbon, which includes the following steps:

[0013] (1) Rich carbon acid washing: Add rich carbon and rich carbon acid washing solution to the rich carbon acid washing tank at a mass ratio of 1:2-3, then aerate and stir for 20-30 minutes, then discharge the liquid phase to the rich carbon acid washing solution tank for reuse, and then add water to the solid phase in the rich carbon acid washing tank for washing 2-4 times.

[0014] (2) Desorption and transport: Start the air compressor and introduce gas with a pressure of 0.1-0.2 MPa into the collection chamber of the carbon-rich pickling tank in step (1). Send the carbon-rich material in the collection chamber to the storage hopper through the feed pipe. The carbon-rich material in the storage hopper flows into the desorption column along the carbon conveying pipe under its own weight and mixes with the desorption liquid at a mass ratio of 1:1-2 for desorption. This allows the valuable metals on the carbon-rich material to dissolve in the desorption liquid, thereby obtaining lean carbon and precious liquid.

[0015] (3) Regeneration of lean carbon: The lean carbon and lean carbon pickling solution in step (2) are added to the lean carbon pickling tank at a mass ratio of 1:2-3. Then, the mixture is aerated and stirred for 15-20 minutes. The discharged lean carbon mixture is then screened by a vibrating screen to obtain activated carbon with a particle size greater than 2 mm.

[0016] Furthermore, the carbonate-rich washing solution in step (1) and the carbonate-poor washing solution in step (3) are both nitric acid solutions with a molar concentration of 0.1-0.2 mol / L.

[0017] Furthermore, the desorption solution in step (2) is a sodium hydroxide solution with a mass concentration of 3%-5%.

[0018] Furthermore, in step (3), the undersize material after screening by the vibrating screen enters the sedimentation tank for sedimentation, and the supernatant is reused as a lean carbon acid washing solution.

[0019] Advantages of this utility model:

[0020] 1. This utility model discloses a gold extraction and regeneration device for gold-loaded carbon. The gold-loaded carbon is fed into a carbon-rich acid washing tank, where nitric acid is used to remove impurities and clean the carbon. This removes various impurities and calcium-containing substances adhering to the surface of the gold-loaded carbon, increasing the active area on the carbon surface and enhancing the dissolution effect of the electrolyte on gold and silver elements. This ensures that gold and silver are fully separated from the activated carbon during desorption. Furthermore, the acid washing process also removes copper elements contained in the gold-loaded carbon, preventing cross-contamination of gold and copper deposits and reducing the difficulty of subsequent desorption.

[0021] 2. This utility model discloses a gold extraction and regeneration device for gold-loaded carbon. By adding an aerated carbon extractor, the gold-loaded carbon is automatically transported from the carbon-rich acid washing tank to the desorption column, eliminating the need for manual bagging and handling by workers. This saves a significant amount of time and labor costs, greatly improving production efficiency. Moreover, the aerated carbon extractor can accurately grab and unload the gold-loaded carbon, reducing activated carbon damage caused by improper manual operation. This not only improves the utilization rate of activated carbon but also reduces production costs. At the same time, it reduces direct contact between workers and the carbon-rich acid washing tank, reducing the hazards of chemicals, improving the working environment, and increasing workers' sense of safety and satisfaction.

[0022] 3. This utility model discloses a gold extraction and regeneration device for gold-loaded carbon. The activated carbon treated in the lean carbon pickling tank is discharged from the bottom onto a vibrating screen. After being screened by the vibrating screen, the carbon powder and water are discharged from the bottom of the vibrating screen and flow into a sedimentation tank through a pipe. High-quality activated carbon flows out from the top of the vibrating screen and is reused to adsorb dissolved gold. First, the addition of a vibrating screen can significantly improve the discharge efficiency of activated carbon, reduce waiting time and labor costs. Second, the screening action of the vibrating screen can remove fine particles and impurities from the activated carbon, improving the quality of the output. Finally, the pickling solution and activated carbon are directly discharged from the discharge port of the lean carbon pickling tank, reducing equipment damage and downtime caused by activated carbon deposition and impurity blockage, and lowering maintenance costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0025] Figure 2 This is a schematic diagram of the overall structure of the gas-filled charcoal extractor of Embodiment 2 of this utility model.

[0026] 1. Aerated carbon collector, 11. Feeding pipe, 12. Collection chamber, 13. Storage hopper, 14. Air supply pipe, 15. Air compressor, 16. Carbon conveying pipe, 17. Feed pipe, 2. Rich carbonate washing tank, 3. Desorption column, 4. Lean carbonate washing tank, 5. Vibrating screen, 6. Rich carbonate washing liquid tank, 7. Sedimentation tank. Detailed Implementation

[0027] The present invention will be further described in detail below through embodiments.

[0028] Example 1: As Figure 1 As shown, a gold extraction and regeneration device for gold-loaded carbon includes an aerated carbon extractor 1, a rich carbonate washing tank 2, a desorption column 3, a lean carbonate washing tank 4, a vibrating screen 5, a rich carbonate washing liquid tank 6, and a sedimentation tank 7. The inlet of the aerated carbon extractor 1 is located in the material inside the rich carbonate washing tank 2, the outlet of the rich carbonate washing tank 2 is connected to the inlet of the rich carbonate washing liquid tank 6, and the outlet of the rich carbonate washing liquid tank 6 is connected to the inlet of the rich carbonate washing tank 2.

[0029] The outlet of the aerated carbon extractor 1 is connected to the inlet of the desorption column 3; the depleted carbon outlet of the desorption column 3 is connected to the inlet of the depleted carbon pickling tank 4, and the outlet of the depleted carbon pickling tank 4 is located above the inlet of the vibrating screen 5. The undersize outlet of the vibrating screen 5 is connected to the inlet of the sedimentation tank 7, and the supernatant outlet of the sedimentation tank 7 is connected to the inlet of the depleted carbon pickling tank 4.

[0030] Example 2: As Figure 2 As shown, the pneumatic carbon extractor 1 includes a feeding pipe 11, a collecting chamber 12, a storage hopper 13, an air supply pipe 14, and an air compressor 15. The bottom end of the feeding pipe 11 is connected to and fixed to the collecting chamber 12. An inlet is provided at the bottom of the collecting chamber 12, which is located in the material inside the carbon-rich acid washing tank 2. The top end of the feeding pipe 11 is connected to and fixed to the storage hopper 13. The outlet of the storage hopper 13 is connected to the inlet of the desorption column 3 through a carbon conveying pipe 16. The outlet of the air supply pipe 14 is placed inside the collecting chamber 12, and the inlet of the air supply pipe 14 is connected to the outlet of the air compressor 15.

[0031] A funnel-shaped feed pipe 17 is connected to the feed inlet of the collection chamber 12. The small diameter end of the feed pipe 17 is fixedly connected to the feed inlet of the collection chamber 12. The funnel-shaped end is in full contact with the gold-loaded carbon, which plays an effective sealing role. This ensures that after the collection chamber 12 is filled with air, the gold-loaded carbon moves along the feed pipe 11 into the storage hopper 13.

[0032] The bottom of the storage hopper 13 is inclined and the top is open. The discharge port of the storage hopper 13 is located at its lowest point. The carbon conveying pipe 16 is inclined downward from the storage hopper 13 to the desorption column 3, so that the gold-loaded carbon in the storage hopper 13 can flow into the desorption column 3 along the carbon conveying pipe 16 under its own weight.

[0033] Example 3: A method for gold extraction and regeneration from gold-loaded carbon, comprising the following steps:

[0034] (1) Rich carbon acid washing: Add rich carbon and rich carbon acid washing solution to the rich carbon acid washing tank 2 at a mass ratio of 1:2.5, then aerate and stir for 25 minutes, then discharge the liquid phase to the rich carbon acid washing solution tank 6 as the rich carbon acid washing solution for reuse, and then add water to the solid phase in the rich carbon acid washing tank 2 for washing 3 times, wherein the rich carbon acid washing solution is a nitric acid solution with a molar concentration of 0.15 mol / L.

[0035] (2) Conveying and desorption: Start the air compressor 15 and introduce gas with a pressure of 0.15 MPa into the collection chamber 12 of the carbon-rich acid washing tank 2 placed in step (1). The carbon-rich material in the collection chamber 12 is sent to the storage hopper 13 through the feed pipe 11. The carbon-rich material in the storage hopper 13 flows into the desorption column 3 along the carbon conveying pipe 16 under its own weight and is mixed with the desorption liquid at a mass ratio of 1:1.5 for desorption. This allows the valuable metals on the carbon-rich material to dissolve in the desorption liquid, thereby obtaining the carbon-poor material and the valuable liquid. The desorption liquid is a sodium hydroxide solution with a mass concentration of 3%-5%.

[0036] (3) Regeneration of lean carbon: The lean carbon and lean carbon pickling solution from step (2) are added to the lean carbon pickling tank 4 at a mass ratio of 1:2.5. Then, the mixture is aerated and stirred for 18 minutes. The discharged lean carbon mixture is then screened by vibrating screen 5 to obtain activated carbon with a particle size greater than 2 mm. The undersize material after screening by vibrating screen 5 enters the sedimentation tank 7 for precipitation, and the supernatant is reused as lean carbon pickling solution. The lean carbon pickling solution is a nitric acid solution with a molar concentration of 0.15 mol / L.

[0037] Example 4: A method for gold extraction and regeneration from gold-loaded carbon, comprising the following steps:

[0038] (1) Rich carbon acid washing: Add rich carbon and rich carbon acid washing solution to the rich carbon acid washing tank 2 at a mass ratio of 1:2, then aerate and stir for 20 minutes, then discharge the liquid phase to the rich carbon acid washing solution tank 6 as the rich carbon acid washing solution for reuse, and then add water to the solid phase in the rich carbon acid washing tank 2 for washing twice, wherein the rich carbon acid washing solution is a nitric acid solution with a molar concentration of 0.1 mol / L.

[0039] (2) Desorption and transport: Start the air compressor 15 and introduce gas with a pressure of 0.1 MPa into the collection chamber 12 of the carbon-rich pickling tank 2 in step (1). Send the carbon-rich material in the collection chamber 12 to the storage hopper 13 through the feed pipe 11. The carbon-rich material in the storage hopper 13 flows into the desorption column 3 along the carbon conveying pipe 16 under its own weight and is mixed with the desorption liquid at a mass ratio of 1:1 for desorption. This allows the valuable metals on the carbon-rich material to dissolve in the desorption liquid, thereby obtaining the carbon-poor material and the valuable liquid. The desorption liquid is a sodium hydroxide solution with a mass concentration of 3%-5%.

[0040] (3) Regeneration of lean carbon: The lean carbon and lean carbon pickling solution from step (2) are added to the lean carbon pickling tank 4 at a mass ratio of 1:2. Then, the mixture is aerated and stirred for 15 minutes. The discharged lean carbon mixture is then screened by vibrating screen 5 to obtain activated carbon with a particle size greater than 2 mm. The undersize material after screening by vibrating screen 5 enters the sedimentation tank 7 for precipitation, and the supernatant is reused as lean carbon pickling solution. The lean carbon pickling solution is a nitric acid solution with a molar concentration of 0.1 mol / L.

[0041] Example 5: A method for gold extraction and regeneration from gold-loaded carbon, comprising the following steps:

[0042] (1) Rich carbon acid washing: Add rich carbon and rich carbon acid washing solution to the rich carbon acid washing tank 2 at a mass ratio of 1:3, then aerate and stir for 30 minutes, then discharge the liquid phase to the rich carbon acid washing solution tank 6 as the rich carbon acid washing solution for reuse, and then add water to the solid phase in the rich carbon acid washing tank 2 for washing 4 times, wherein the rich carbon acid washing solution is a nitric acid solution with a molar concentration of 0.2 mol / L.

[0043] (2) Desorption and transport: Start the air compressor 15 and introduce gas with a pressure of 0.2 MPa into the collection chamber 12 of the carbon-rich acid washing tank 2 placed in step (1). Send the carbon-rich material in the collection chamber 12 to the storage hopper 13 through the feed pipe 11. The carbon-rich material in the storage hopper 13 flows into the desorption column 3 along the carbon conveying pipe 16 under its own weight and is mixed with the desorption liquid at a mass ratio of 1:2 for desorption. This allows the valuable metals on the carbon-rich material to dissolve in the desorption liquid, thereby obtaining the carbon-poor material and the valuable liquid. The desorption liquid is a sodium hydroxide solution with a mass concentration of 3%-5%.

[0044] (3) Regeneration of lean carbon: The lean carbon and lean carbon pickling solution from step (2) are added to the lean carbon pickling tank 4 at a mass ratio of 1:3. Then, the mixture is aerated and stirred for 20 minutes. The discharged lean carbon mixture is then screened by a vibrating screen 5 to obtain activated carbon with a particle size greater than 2 mm. The undersize material after screening by the vibrating screen 5 enters the sedimentation tank 7 for precipitation, and the supernatant is reused as lean carbon pickling solution. The lean carbon pickling solution is a nitric acid solution with a molar concentration of 0.2 mol / L.

[0045] The above are preferred embodiments of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A gold elution regeneration device of gold-loaded carbon, characterized in that, It includes an aerated carbon collector, a rich carbon acid washing tank, a desorption column, a lean carbon acid washing tank, and a vibrating screen; the inlet of the aerated carbon collector is located in the material inside the rich carbon acid washing tank, and the outlet of the aerated carbon collector is connected to the inlet of the desorption column; the lean carbon outlet of the desorption column is connected to the inlet of the lean carbon acid washing tank, and the outlet of the lean carbon acid washing tank is located above the inlet end of the vibrating screen.

2. The gold elution regeneration device of claim 1, wherein, The pneumatic carbon extractor includes a feeding pipe, a collecting chamber, a storage hopper, an air supply pipe, and an air compressor. The bottom end of the feeding pipe is connected to and fixed to the collecting chamber, and an inlet is provided at the bottom of the collecting chamber. The collecting chamber is located within the material in the carbon-rich acid washing tank. The top end of the feeding pipe is connected to and fixed to the storage hopper, and the outlet of the storage hopper is connected to the inlet of the desorption column through a carbon conveying pipe. The outlet end of the air supply pipe is placed in the collecting chamber, and the inlet end of the air supply pipe is connected to the outlet of the air compressor.

3. The gold extraction and regeneration device for gold-loaded carbon according to claim 2, characterized in that, A flared feed pipe is connected to the feed inlet of the collection chamber, and the small-diameter end of the feed pipe is fixedly connected to the feed inlet of the collection chamber.

4. The gold extraction and regeneration device for gold-loaded carbon according to claim 2, characterized in that, The bottom of the storage hopper is inclined and the top is open. The discharge port of the storage hopper is located at its lowest point. The carbon conveying pipe is inclined downward from the storage hopper to the desorption column.

5. The gold extraction and regeneration device for gold-loaded carbon according to claim 1, characterized in that, It also includes a carbonate-rich washing solution tank, wherein the outlet of the carbonate-rich washing tank is connected to the inlet of the carbonate-rich washing solution tank, and the outlet of the carbonate-rich washing solution tank is connected to the inlet of the carbonate-rich washing tank.

6. The gold extraction and regeneration apparatus for gold-loaded carbon according to claim 1, characterized in that, It also includes a sedimentation tank, the outlet of the undersize material of the vibrating screen is connected to the inlet of the sedimentation tank, and the outlet of the supernatant of the sedimentation tank is connected to the inlet of the lean carbon acid washing tank.

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