Novel all-mud cyaniding system

Abstract

The utility model discloses a novel all-mud cyaniding system which comprises a ball mill, a cyclone, a cyaniding leaching system, a sedimentation tank and a plurality of activated carbon adsorption tanks which are sequentially communicated, a tailing slurry outlet of the cyanidation leaching system is communicated with a slurry inlet of the sedimentation tank, an overflow port of the sedimentation tank is communicated with a liquid inlet of the first activated carbon adsorption tank, a liquid outlet of the last activated carbon adsorption tank is communicated with a water inlet of the water storage tank, and a water outlet of the water storage tank is communicated with a liquid inlet of the ball mill; and a discharge hole of the activated carbon adsorption tank is communicated with an activated carbon inlet of the cyanidation leaching system. The utility model has the advantages that the connecting structure is simple and easy to realize, the recycling of the medicament is realized, the use amount of the subsequent medicament is reduced, meanwhile, the effective recycling of gold and silver elements is realized, and the hidden danger of environmental protection is reduced.

Description

Technical fields:

[0001] This utility model relates to a whole mud cyanidation system, and more particularly to a novel whole mud cyanidation system. Background technology:

[0002] The whole-sludge cyanidation carbon-in-pulp process specifically involves sequentially crushing the gold ore using a jaw crusher and a cone crusher, then grinding it into a slurry using a ball mill. This slurry is then subjected to cyanidation leaching, followed by the direct adsorption of dissolved gold from the slurry with activated carbon to form gold-loaded carbon. Finally, the gold-loaded carbon is electrolyzed to obtain gold-bearing anode slime (see details). Figure 1 ).

[0003] However, the above process generates a large amount of cyanide-containing tailings slurry. This cyanide-containing tailings slurry not only contains a certain amount of highly toxic cyanide, but also contains reagents and heavy metal ions such as gold and silver. If it is not effectively treated, it will pose a significant environmental hazard.

[0004] Moreover, the process described above only involves preliminary screening by a classifier. Therefore, when activated carbon adsorbs dissolved gold, it will also adsorb unseparated ore impurities, affecting the subsequent electrolysis effect.

[0005] Meanwhile, the cyanide leaching process described above involves the slurry sequentially passing through a dosing and conditioning tank and multiple leaching and adsorption tanks. Specifically, the slurry first enters the dosing and conditioning tank for dosing, then sequentially enters the leaching and adsorption tanks for adsorption, and finally, the last leaching and adsorption tank discharges the cyanide-containing tailings slurry. Adsorbed carbon enters from the last leaching and adsorption tank in the opposite direction of the slurry treatment and exits from the first leaching and adsorption tank, forming gold-loaded carbon that proceeds to the next step of electrolysis. Currently, the dosing and conditioning tank is filled by gravity, where the reagents in the mixing tank flow into the tank. When the reagents in the mixing tank decrease, the amount of reagent flowing into the tank per minute also decreases, leading to unstable reagent flow and consequently affecting the cyanide leaching effect. Utility Model Content:

[0006] The purpose of this invention is to provide a novel whole-sludge cyanidation system with a simple connection structure, reduced environmental risks, and guaranteed cyanide leaching effect.

[0007] This utility model is implemented by the following technical solution: The purpose of this patent is to provide a novel whole-sludge cyanidation system, which includes a ball mill, a hydrocyclone, a cyanide leaching system, a settling tank, and multiple activated carbon adsorption tanks connected in sequence; the slurry outlet of the ball mill is connected to the slurry inlet of the hydrocyclone, the slurry outlet of the hydrocyclone is connected to the slurry inlet of the cyanide leaching system, the tailings slurry outlet of the cyanide leaching system is connected to the slurry inlet of the settling tank, the overflow outlet of the settling tank is connected to the liquid inlet of the first activated carbon adsorption tank, the liquid outlet of the last activated carbon adsorption tank is connected to the water inlet of a water storage tank, and the water outlet of the water storage tank is connected to the liquid inlet of the ball mill; the discharge outlet of the activated carbon adsorption tank is connected to the activated carbon inlet of the cyanide leaching system.

[0008] Furthermore, it also includes a rotary drum screen, wherein the outlet of the hydrocyclone is connected to the inlet of the rotary drum screen, and the undersize outlet of the rotary drum screen is connected to the inlet of the cyanide leaching system.

[0009] Furthermore, the cyanide leaching system includes a dosing and slurry preparation tank, a reagent stirring tank, a buffer tank, and multiple leaching adsorption tanks connected in sequence. The outlet of the reagent stirring tank is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the dosing and slurry preparation tank, the undersize outlet of the drum screen is connected to the inlet of the dosing and slurry preparation tank, the outlet of the dosing and slurry preparation tank is connected to the inlet of the first leaching adsorption tank, and the tailings slurry outlet of the last leaching adsorption tank is connected to the inlet of the settling tank.

[0010] Furthermore, the outlet of the activated carbon adsorption tank is connected to the activated carbon inlet of the last leaching adsorption tank.

[0011] Advantages of this utility model: 1. The connection structure of this utility model is simple and easy to implement. After the tailings slurry is naturally clarified in the sedimentation tank, the clear water is adsorbed one by one in six activated carbon adsorption tanks before being discharged into the storage tank, realizing the adsorption of gold and silver elements in the tailings clear water. The activated carbon after adsorbing gold and silver elements is sent to the last leaching adsorption tank, and then passes through the remaining leaching adsorption tanks in the opposite direction of the slurry treatment. It is discharged from the first leaching adsorption tank to form gold-loaded carbon for the next step of electrolysis. The clear water in the storage tank containing cyanide and reagents is sent to the ball mill for continued use, realizing the reagents 1. Recycling reduces the amount of subsequent reagents used, while achieving effective recovery of gold and silver elements and reducing environmental hazards; 2. By adding a drum screen, the slurry separated by the hydrocyclone is further screened, avoiding the adsorption of ore impurities by activated carbon and ensuring the subsequent electrolysis effect; 3. By adding the reagents from the reagent mixing tank to the buffer tank, and then the reagents in the buffer tank flow into the dosing and slurry preparation tank, the small volume of the buffer tank effectively ensures the stability of the liquid level inside, thereby ensuring that the amount of reagents flowing into the dosing and slurry preparation tank per minute tends to be stable, ensuring the cyanide leaching effect. Attached image description:

[0012] 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.

[0013] Figure 1 This is a schematic diagram of a system based on existing technology.

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0015] 1. Ball mill; 2. Hydrocyclone; 3. Cyanide leaching system; 31. Dosing and slurry preparation tank; 32. Chemical mixing tank; 33. Buffer tank; 34. Leaching and adsorption tank; 4. Sedimentation tank; 5. Activated carbon adsorption tank; 6. Rotary drum screen; 7. Water storage tank; 8. Classifier. Detailed implementation method:

[0016] Example: Figure 2As shown, a novel whole-sludge cyanidation system includes a ball mill 1, a hydrocyclone 2, a cyanide leaching system 3, a settling tank 4, six activated carbon adsorption tanks 5 connected in sequence, and a drum screen 6. The outlet of the ball mill 1 is connected to the inlet of the hydrocyclone 2, the outlet of the hydrocyclone 2 is connected to the inlet of the drum screen 6, and the undersize outlet of the drum screen 6 is connected to the inlet of the cyanide leaching system 3. The cyanide leaching system 3 includes a chemical dosing tank 31, a chemical mixing tank 32, a buffer tank 33, and five leaching adsorption tanks 34 connected in sequence. The outlet of the chemical mixing tank 32 is connected to the inlet of the buffer tank 33, and the outlet of the buffer tank 33 is connected to the inlet of the buffer tank 34. The chemical inlet is connected to the chemical inlet of the chemical dosing and slurry conditioning tank 31; the undersize outlet of the drum screen 6 is connected to the slurry inlet of the chemical dosing and slurry conditioning tank 31; the slurry outlet of the chemical dosing and slurry conditioning tank 31 is connected to the slurry inlet of the first leaching and adsorption tank 34; the tailings slurry outlet of the last leaching and adsorption tank 34 is connected to the slurry inlet of the settling tank 4; the overflow outlet of the settling tank 4 is connected to the liquid inlet of the first activated carbon adsorption tank 5; the liquid outlet of the last activated carbon adsorption tank 5 is connected to the water inlet of the water storage tank 7; the water outlet of the water storage tank 7 is connected to the liquid inlet of the ball mill 1; and the discharge outlet of the activated carbon adsorption tank 5 is connected to the activated carbon feed inlet of the last leaching and adsorption tank 34.

[0017] Working principle: The crushed ore and water are added to the ball mill 1 for ball milling to form a slurry. Then, it is classified by the classifier 8. Large materials are re-ball milled, while small materials are classified again in the hydrocyclone 2. The classified slurry is then screened by the drum screen 6 to remove impurities. The screened slurry is sent to the dosing and conditioning tank 31. The reagent in the reagent mixing tank 32 is added to the buffer tank 33, and then the reagent in the buffer tank 33 flows into the dosing and conditioning tank 31. After that, it is adsorbed one by one in five leaching and adsorption tanks 34. The adsorbed carbon enters from the last leaching and adsorption tank 34 in the opposite direction of the slurry processing direction and exits from the first leaching and adsorption tank 34. The gold-loaded carbon is then used for the next step of electrolysis. After the cyanide-containing tailings slurry discharged from the last leaching adsorption tank 34 is naturally clarified in the sedimentation tank, the clear water is adsorbed one by one in the six activated carbon adsorption tanks 5 before being discharged into the water storage tank 7. This process achieves the adsorption of gold and silver elements in the tailings water. The activated carbon after adsorbing gold and silver elements is sent to the last leaching adsorption tank 34, and then passes through the remaining leaching adsorption tanks 34 in the opposite direction of the slurry treatment. The clear water containing cyanide and reagents in the water storage tank 7 is sent to the ball mill 1 for continued use, realizing the recycling of reagents, reducing the amount of reagents used in the subsequent process, and effectively recovering gold and silver elements, thus reducing environmental hazards.

[0018] By adding a drum screen 6, the slurry separated by the hydrocyclone 2 is effectively screened further, avoiding the adsorption of ore impurities by activated carbon and ensuring the subsequent electrolysis effect.

[0019] By adding the reagent from the reagent mixing tank 32 into the buffer tank 33, and then the reagent in the buffer tank 33 flows into the dosing and slurry preparation tank 31, the small volume of the buffer tank 33 effectively ensures the stability of the liquid level inside, thereby ensuring that the amount of reagent flowing into the dosing and slurry preparation tank 31 per minute tends to be stable, thus ensuring the cyanide leaching effect.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel total slime cyanidation system characterized in that, It includes a ball mill, a cyclone, a cyanide leaching system, a sedimentation tank and a plurality of activated carbon adsorption tanks in sequence; the slurry outlet of the ball mill is communicated with the slurry inlet of the cyclone, the slurry outlet of the cyclone is communicated with the slurry inlet of the cyanide leaching system, the tailing slurry outlet of the cyanide leaching system is communicated with the slurry inlet of the sedimentation tank, the overflow port of the sedimentation tank is communicated with the liquid inlet of the first activated carbon adsorption tank, the liquid outlet of the last activated carbon adsorption tank is communicated with the water inlet of the water storage tank, and the water outlet of the water storage tank is communicated with the liquid inlet of the ball mill; the discharge outlet of the activated carbon adsorption tank is communicated with the activated carbon inlet of the cyanide leaching system.

2. A novel total slime cyanidation system as claimed in claim 1, wherein, It also includes a drum screen, the slurry outlet of the cyclone is communicated with the slurry inlet of the drum screen, and the undersize outlet of the drum screen is communicated with the slurry inlet of the cyanide leaching system.

3. A novel total slime cyanidation system as claimed in claim 2, wherein, The cyanide leaching system includes a dosing and slurry mixing tank, a medicament stirring barrel, a buffer small tank and a plurality of leaching and adsorption tanks in sequence, the medicament outlet of the medicament stirring barrel is communicated with the medicament inlet of the buffer small tank, the medicament outlet of the buffer small tank is communicated with the medicament inlet of the dosing and slurry mixing tank, the undersize outlet of the drum screen is communicated with the slurry inlet of the dosing and slurry mixing tank, the slurry outlet of the dosing and slurry mixing tank is communicated with the slurry inlet of the first leaching and adsorption tank, and the tailing slurry outlet of the last leaching and adsorption tank is communicated with the slurry inlet of the sedimentation tank.

4. A novel total slime cyanidation system as claimed in claim 3, wherein, The discharge outlet of the activated carbon adsorption tank is communicated with the activated carbon inlet of the last leaching and adsorption tank.

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