Control device and method for activated carbon in all-slime cyanidation carbon-in-pulp gold extraction process

Abstract

The present invention discloses a control device and method for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process, which relates to the technical field of all-slime cyanidation carbon-in-pulp gold extraction process. The present invention includes multiple groups of leaching and absorption tanks, a water pipe and a carbon powder pipe. The water pipe is connected to the leaching and absorption tanks through a make-up water pipe, and a flow control valve II is fixedly installed inside the make-up water pipe. The carbon powder pipe is connected to the leaching and absorption tanks through a make-up carbon pipe, and a flow control valve III is fixedly installed inside the make-up carbon pipe. A carbon extractor is fixedly installed inside the leaching and absorption tank, and the discharge port of the carbon extractor is connected to the next group of leaching and absorption tanks through a connecting pipe. Through the setting of the make-up carbon pipe and the flow control valve III, the present invention can simultaneously control multiple groups of leaching and absorption tanks to add different carbon powders. Therefore, without stopping the flow of the pulp, while adjusting the carbon density of the corresponding leaching and absorption tank, it will not affect the carbon density of the next group of leaching and absorption tanks. The carbon seal control accuracy is high, and there is no need to stop the flow of the pulp, which greatly improves the gold extraction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of the all-slime cyanidation carbon-in-pulp gold extraction process, and particularly relates to a control device and method for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process. Background Art

[0002] The all-slime cyanidation carbon-in-pulp gold extraction and smelting process refers to a process method in which gold ore is all ground and slimeified into pulp (the content of -200 mesh accounts for more than 90-95%), then cyanide leaching is carried out first, and then activated carbon is directly used to adsorb the dissolved gold from the pulp, the gold-loaded carbon is desorbed, and the gold mud is directly separated, purified and smelted.

[0003] In the literature (application number: CN200910172565.7), a partition tank jumping cyanidation carbon-in-pulp competitive adsorption gold extraction process is disclosed. In this process, the cyanide pulp sequentially passes through multiple stirring leaching tanks. Starting from the last leaching tank, at least two leaching tanks (including the last leaching tank) are selected as carbon stringing tanks, and the rest are ordinary leaching tanks. The activated carbon is added from the last leaching tank and flows through each carbon stringing tank in reverse order; there is at least one ordinary leaching tank in the interval between at least one group of adjacent carbon stringing tanks. Both this patent and the prior art adopt multi-group leaching and absorption tanks for segmented leaching and absorption treatment. In the actual treatment process, it is necessary to determine the standard carbon density of each leaching tank according to the designed carbon distribution density, and adjust the subsequent carbon stringing amount. The currently commonly used method is: every 8 hours, manually measure the volume of a single spoon of carbon, input it into the automatic carbon stringing system, calculate the actual carbon density, use it as a single variable, and compare it with the standard carbon density. The test efficiency is low. At the same time, when adjusting the carbon density subsequently, it is necessary to stop the pulp from flowing into the subsequent leaching and absorption tanks. And due to the large number of leaching and absorption tanks, it takes a long time to adjust, seriously affecting the gold extraction efficiency. Summary of the Invention

[0004] The purpose of the present invention is: to solve the above problems, the present invention provides a control device and method for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process.

[0005] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0006] A control device for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process includes multiple groups of leaching and absorption tanks, a water pipe and a carbon powder pipe. The water pipe is connected to the leaching and absorption tanks through a makeup water pipe, and a flow control valve II is fixedly installed inside the makeup water pipe. The carbon powder pipe is connected to the leaching and absorption tanks through a makeup carbon pipe, and a flow control valve III is fixedly installed inside the makeup carbon pipe. A carbon lifter is fixedly installed inside the leaching and absorption tank, and the discharge port of the carbon lifter is connected to the next group of leaching and absorption tanks through a connecting pipe;

[0007] A carbon control component is arranged between adjacent soaking tanks. The carbon control component includes a carbon control tank. A slurry inlet pipe is arranged at the top of the carbon control tank. The slurry inlet pipe is communicated with a connecting pipe. A flow control valve I is fixedly installed inside the slurry inlet pipe. A liquid level sensor is fixedly installed at the inner top of the carbon control tank. A slurry discharge port is formed at the bottom of the carbon control tank. A slurry discharge valve is fixedly installed inside the slurry discharge port. A slurry discharge pipe is fixedly installed at the bottom of the slurry discharge port. The slurry discharge pipe is communicated with the next group of soaking tanks;

[0008] A filtering distance is arranged between the slurry discharge pipe and the slurry discharge port. A ranging sensor is fixedly installed on the left side of the bottom of the carbon control tank. A telescopic cylinder is fixedly installed on the right side of the bottom of the carbon control tank. A turning motor is fixedly installed on the left side of the telescopic end of the telescopic cylinder. A filter pipe is fixedly installed on the left side of the output end of the turning motor. The filter pipe can just be inserted into the filtering distance. A filter screen is fixedly installed inside the filter pipe.

[0009] Further, a stirring shaft is arranged inside the soaking tank.

[0010] Further, the bottom of the carbon control tank is designed in a funnel shape.

[0011] Further, a flushing pipe is arranged at the top of the carbon control tank. The flushing pipe is communicated with a water pipe. A flushing valve is fixedly installed inside the flushing pipe.

[0012] Further, sealing rubber rings are arranged at the bottom of the slurry discharge port and the top of the slurry discharge pipe.

[0013] Further, the outer surface of the sealing rubber ring is designed in a conical shape.

[0014] Further, the turning motor adopts a three-phase asynchronous motor.

[0015] A method for controlling activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process includes the following steps:

[0016] S1. Raw material preparation: Crushing the gold ore to a suitable particle size, and then using a ball mill to grind the crushed ore to make the ore particles reach a finer state, increasing the exposed area of gold;

[0017] S2. Soaking: Adding the ground pulp and sodium cyanide solution into the soaking tank for mixing, performing cyanidation leaching. After leaching, adding activated carbon to the pulp. The activated carbon can effectively adsorb gold cyanide complexes, and then using a carbon lifter to sequentially transport the pulp to the subsequent soaking tanks. Through multiple groups of soaking tanks, gold leaching and adsorption can be carried out in stages, thereby improving the gold recovery rate. During the transportation process, the carbon density in the pulp is detected by the carbon control component every 8 hours;

[0018] S3. When the carbon density is low: It indicates that the carbon density in the previous set of impregnation tanks is low. The carbon supplement amount is controlled by the flow control valve three. At the same time, according to the carbon extraction speed of the carbon extractor, the corresponding carbon powder is supplemented into the latter set of impregnation tanks, so that the carbon density of the pulp entering the latter set of impregnation tanks meets the standard.

[0019] S4. When the carbon density is high: It indicates that the carbon density in the previous set of impregnation tanks is high. The water supplement amount is controlled by the flow control valve two. At the same time, the feed pipe and the discharge valve are opened, part of the pulp is filtered through the filter screen, and the filtration amount is controlled by the flow control valve one, so that the carbon density of the pulp entering the latter set of impregnation tanks meets the standard.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. Through the setting of the carbon supplement pipe and the flow control valve three, the present invention can control the addition of different carbon powders to multiple sets of impregnation tanks at the same time. Therefore, without stopping the flow of the pulp, while adjusting the carbon density of the corresponding impregnation tank, it will not affect the carbon density of the next set of impregnation tanks. Through the setting of the flow control valve one, the amount of pulp entering the carbon control tank is controlled. The pulp filters out the carbon powder therein through the filter screen, and it will not affect the carbon density of the next set of impregnation tanks. Furthermore, when adjusting the carbon density of each impregnation tank, it will not affect the carbon density in other impregnation tanks. The carbon seal control accuracy is high, and there is no need to stop the flow of the pulp, greatly improving the gold extraction efficiency.

[0022] 2. A certain amount of pulp is injected into the carbon control tank in the present invention, and then the pulp is filtered through the filter screen. The carbon powder falling after filtration accumulates on the filter screen. Then, the filter pipe is pushed under the ranging sensor by the telescopic air cylinder. Since the height of the ranging sensor is certain, the ranging sensor can detect the height of the carbon powder inside the filter pipe. Since the radius of the filter pipe is certain, the amount of carbon powder can be calculated, and then the carbon density can be calculated, which can be measured while the pulp is flowing. Moreover, the carbon density detection and the reduction of the carbon seal are of the same structure, and the structure is compact. Description of the Drawings

[0023] Figure 1 is the schematic structural diagram of the system of the present invention;

[0024] Figure 2 is the schematic connection structure diagram of adjacent impregnation tanks of the present invention;

[0025] Figure 3 is the filtration schematic diagram of the carbon control component of the present invention;

[0026] Figure 4 is the detection schematic diagram of the carbon control component of the present invention;

[0027] Figure 5 is the powder discharge schematic diagram of the carbon control component of the present invention.

[0028] Reference numerals: 1, soaking tank; 2, water pipe; 3, carbon powder pipe; 4, stirring shaft; 5, carbon extractor; 6, connecting pipe; 7, carbon control tank; 71, slurry inlet pipe; 72, flow control valve I; 73, flushing pipe; 74, flushing valve; 75, liquid level sensor; 76, slurry discharge valve; 77, slurry discharge pipe; 78, telescopic cylinder; 79, flipping motor; 710, filter pipe; 711, filter screen; 712, distance measuring sensor; 713, sealing rubber ring; 8, water make-up pipe; 81, flow control valve II; 9, carbon make-up pipe; 91, flow control valve III. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Embodiment 1, as Figures 1-5 shown, a control device for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process includes multiple groups of soaking tanks 1, water pipes 2 and carbon powder pipes 3. The water pipe 2 is connected to the soaking tank 1 through a water make-up pipe 8. A flow control valve II 81 is fixedly installed inside the water make-up pipe 8. The carbon powder pipe 3 is connected to the soaking tank 1 through a carbon make-up pipe 9. A flow control valve III 91 is fixedly installed inside the carbon make-up pipe 9. A carbon extractor 5 is fixedly installed inside the soaking tank 1. The discharge port of the carbon extractor 5 is connected to the next group of soaking tanks 1 through a connecting pipe 6;

[0031] A carbon control assembly is arranged between adjacent soaking tanks 1. The carbon control assembly includes a carbon control tank 7. A slurry inlet pipe 71 is arranged at the top of the carbon control tank 7. The slurry inlet pipe 71 is connected to the connecting pipe 6. A flow control valve I 72 is fixedly installed inside the slurry inlet pipe 71. A liquid level sensor 75 is fixedly installed at the inner top of the carbon control tank 7. A slurry discharge port is opened at the bottom of the carbon control tank 7. A slurry discharge valve 76 is fixedly installed inside the slurry discharge port. A slurry discharge pipe 77 is fixedly installed at the bottom of the slurry discharge port. The slurry discharge pipe 77 is connected to the next group of soaking tanks 1;

[0032] A filtering distance is arranged between the slurry discharge pipe 77 and the slurry discharge port. A distance measuring sensor 712 is fixedly installed on the left side of the bottom of the carbon control tank 7. A telescopic cylinder 78 is fixedly installed on the right side of the bottom of the carbon control tank 7. A flipping motor 79 is fixedly installed on the left side of the telescopic end of the telescopic cylinder 78. A filter pipe 710 is fixedly installed on the left side of the output end of the flipping motor 79. The filter pipe 710 can just be inserted into the filtering distance. A filter screen 711 is fixedly installed inside the filter pipe 710.

[0033] Through the settings of the carbon extractor 5 and the connecting pipe 6, the pulp enters the next leaching and adsorption tank 1 from the previous leaching and adsorption tank 1, enabling the leaching and adsorption of gold to be carried out in stages, thereby improving the gold recovery rate. After 8 hours, the carbon density is detected. The flow control valve 72 is fully opened, and part of the pulp in the previous group of leaching and adsorption tanks 1 enters the carbon control tank 7. The pulp accumulates in the carbon control tank 7. When the predetermined liquid level is reached, the liquid level sensor 75 feeds back the liquid level height, and the external controller controls the flow control valve 72 to close, and then controls the slurry discharge valve 76 to open. The pulp is filtered through the filter screen 711, and the filtered pulp enters the next group of leaching and adsorption tanks 1, without causing pulp waste. When the pulp in the carbon control tank 7 is completely filtered, the telescopic cylinder 78 is controlled to operate. The telescopic cylinder 78 drives the flipping motor 79 to move leftward, and the flipping motor 79 drives the filter pipe 710 to move leftward. The filter pipe 710 moves to directly below the distance measuring sensor 712. Since the height of the distance measuring sensor 712 and the filter screen 711 is fixed, the height of the carbon powder in the filter pipe 710 can be measured. Since the inner diameter of the filter pipe 710 is fixed, the amount of carbon powder can be calculated. And the amount of pulp in the carbon control tank 7 is also certain, so the carbon density can be calculated, which is convenient to measure;

[0034] Through the settings of multiple groups of carbon control components, the carbon density in all leaching and adsorption tanks 1 can be measured simultaneously, and then the carbon density in all leaching and adsorption tanks 1 can be adjusted simultaneously, without stopping the pulp flow. When the carbon density is low, the corresponding flow control valve 91 is opened to allow the carbon powder to enter the corresponding leaching and adsorption tank 1 to adjust the carbon density. It should be noted that when the pulp is flowing, the pulp with low carbon density will affect the adjustment of the carbon density of the next group of pulp. Therefore, the flow control valve 91 on the next group of leaching and adsorption tanks 1 needs to be opened simultaneously to supplement the corresponding amount of carbon powder;

[0035] When the carbon seal is high, the flow control valve 72 and the slurry discharge valve 76 between this leaching and adsorption tank 1 and the next group of leaching and adsorption tanks 1 are opened. Part of the pulp passes through the carbon control tank 7 and then is filtered through the filter screen 711 to filter out the excess carbon powder. The filtered pulp enters the next group of leaching and adsorption tanks 1, so that the carbon powder density of the pulp entering the next group of leaching and adsorption tanks 1 per unit time meets the standard. And the flow control valve 81 on this leaching and adsorption tank 1 is opened, and the water supply pipe 8 adds water to the leaching and adsorption tank 1. During the water addition process, the carbon powder density in this leaching and adsorption tank 1 is changing. Therefore, according to the water addition amount, the opening size of the flow control valve 72 is controlled to control the amount of pulp entering the carbon control tank 7, ensuring that the carbon density of the pulp entering the next leaching and adsorption tank 1 meets the requirements and will not affect the adjustment of the carbon density in the next leaching and adsorption tank 1, with high adjustment quality.

[0036] Through the settings of the carbon control components, the present invention can not only automatically detect the carbon density, but also reduce the carbon density, with strong functionality and a compact structure. At the same time, it can synchronously adjust the carbon density of the pulp inside multiple groups of leaching and adsorption tanks 1 at one time without stopping the pulp flow, and has a high gold extraction efficiency.

[0037] Example 2. On the basis of the above example, it further includes that a stirring shaft 4 is arranged inside the soaking tank 1. Through the arrangement of the stirring shaft 4, the pulp soaking is more sufficient, and when adjusting the carbon density subsequently, the adjustment is more uniform.

[0038] Example 3. On the basis of the above example, it further includes that the bottom of the carbon control tank 7 is designed in a funnel shape. Through this design, the pulp can be discharged faster.

[0039] Example 4. On the basis of the above example, it further includes that a flushing pipe 73 is arranged at the top of the carbon control tank 7. The flushing pipe 73 is communicated with the water pipe 2, and a flushing valve 74 is fixedly installed inside the flushing pipe 73.

[0040] By opening the flushing valve 74, the water in the water pipe 2 enters the carbon control tank 7 through the flushing pipe 73 to flush the inner wall of the carbon control tank 7, preventing the residual pulp on its inner wall and improving the measurement accuracy of the carbon density.

[0041] Example 5. On the basis of the above example, it further includes that sealing rubber rings 713 are arranged at the bottom of the slurry discharge port and the top of the slurry discharge pipe 77.

[0042] Furthermore, the outer surface of the sealing rubber ring 713 is designed in a conical shape.

[0043] Through this design, when the filter pipe 710 enters the filtering space, the sealing rubber ring 713 can be squeezed between the top and bottom of the filter pipe 710, and the sealing effect is good.

[0044] Example 6. On the basis of the above example, it further includes that the reversing motor 79 adopts a three-phase asynchronous motor. Through this design, after the carbon powder height detection is completed, the reversing motor 79 is controlled to rotate. The reversing motor 79 drives the filter pipe 710 to turn over to pour out the carbon powder, and then the reversing motor 79 is controlled to rotate forward and reverse repeatedly. The reversing motor 79 drives the filter pipe 710 to swing to throw out the internal carbon powder, preventing the residual carbon powder inside the filter pipe 710 and not affecting the subsequent detection.

[0045] Example 7. A control method for activated carbon in the all-slime cyanidation carbon-in-pulp gold extraction process includes the following steps:

[0046] S1. Raw material preparation: The gold ore is crushed to a suitable particle size, and then the crushed ore is ground by a ball mill to make the ore particles reach a finer state, increasing the exposed area of gold.

[0047] S2. Immersion and Absorption: The ground pulp and sodium cyanide solution are added to the immersion and absorption tank 1 for mixing, and cyanidation leaching is carried out. After leaching, activated carbon is added to the pulp. The activated carbon can effectively adsorb the gold cyanide complex. Then, the pulp is successively transported to the subsequent immersion and absorption tanks 1 by the carbon extraction device 5. Through multiple groups of immersion and absorption tanks, the leaching and adsorption of gold can be carried out in stages, thereby improving the gold recovery rate. During the transportation process, the carbon density in the pulp is detected every 8 hours through the carbon control component;

[0048] When the carbon density is low: It indicates that the carbon density in the previous group of immersion and absorption tanks 1 is low. The carbon supplement amount is controlled by the third carbon control valve 91. At the same time, the subsequent group of immersion and absorption tanks 1 replenishes the corresponding carbon powder according to the carbon extraction speed of the carbon extraction device 5, so that the carbon density of the pulp entering the subsequent group of immersion and absorption tanks 1 meets the standard;

[0049] When the carbon density is high: It indicates that the carbon density in the previous group of immersion and absorption tanks 1 is high. The water supplement amount is controlled by the second carbon control valve 81. At the same time, the slurry inlet pipe 71 and the discharge valve 76 are opened. Part of the pulp is filtered through the filter screen 711, and the filtration amount is controlled by the first carbon control valve 72, so that the carbon density of the pulp entering the subsequent group of immersion and absorption tanks 1 meets the standard.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control device for activated carbon in a full-mud cyanidation carbon slurry gold extraction process, comprising a plurality of groups of leaching and absorption tanks (1), water pipes (2) and carbon powder pipes (3), characterized in that: The water pipe (2) is connected to the immersion and absorption tank (1) via a water supply pipe (8), a second flow control valve (81) is fixedly installed inside the water supply pipe (8), the carbon powder pipe (3) is connected to the immersion and absorption tank (1) via a carbon supply pipe (9), a third flow control valve (91) is fixedly installed inside the carbon supply pipe (9), a carbon extractor (5) is fixedly installed inside the immersion and absorption tank (1), and the discharge port of the carbon extractor (5) is connected to the next group of immersion and absorption tanks (1) via a connecting pipe (6); A carbon control assembly is arranged between adjacent immersion and absorption tanks (1), the carbon control assembly comprising a carbon control tank (7), a slurry inlet pipe (71) is arranged at the top of the carbon control tank (7), the slurry inlet pipe (71) is connected to the connecting pipe (6), a flow control valve (72) is fixedly installed inside the slurry inlet pipe (71), a liquid level sensor (75) is fixedly installed at the top of the inner part of the carbon control tank (7), a slurry discharge port is opened at the bottom of the carbon control tank (7), a slurry discharge valve (76) is fixedly installed inside the slurry discharge port, a slurry discharge pipe (77) is fixedly installed at the bottom of the slurry discharge port, and the slurry discharge pipe (77) is connected to the next group of immersion and absorption tanks (1); A filtering distance is provided between the slurry discharge pipe (77) and the slurry discharge port; a distance measuring sensor (712) is fixedly mounted on the left side of the bottom of the carbon control tank (7); a telescopic cylinder (78) is fixedly mounted on the right side of the bottom of the carbon control tank (7); a turning motor (79) is fixedly mounted on the left side of the telescopic end of the telescopic cylinder (78); a filter tube (710) is fixedly mounted on the left side of the output end of the turning motor (79); the filter tube (710) can be just inserted into the filtering distance; a filter screen (711) is fixedly mounted inside the filter tube (710).

2. The control device for activated carbon in the whole mud cyanide carbon slurry gold extraction process according to claim 1, characterized in that: A stirring shaft (4) is arranged inside the immersion and absorption tank (1).

3. The control device for activated carbon in the whole mud cyanidation carbon slurry gold extraction process according to claim 1, characterized in that: The bottom of the carbon control tank (7) is designed to be funnel-shaped.

4. The control device for activated carbon in the full-mud cyanidation carbon slurry gold extraction process according to claim 3 is characterized in that: A flushing pipe (73) is provided on the top of the carbon control canister (7), the flushing pipe (73) is connected to the water pipe (2), and a flushing valve (74) is fixedly installed inside the flushing pipe (73).

5. The control device for activated carbon in the whole mud cyanide carbon slurry gold extraction process according to claim 1, characterized in that: The bottom of the slurry discharge port and the top of the slurry discharge pipe (77) are both provided with sealing rubber rings (713).

6. The control device for activated carbon in the full-mud cyanidation carbon slurry gold extraction process according to claim 5, characterized in that: The outer surface of the sealing rubber ring (713) is designed to be conical.

7. The control device for activated carbon in the whole mud cyanidation carbon slurry gold extraction process according to claim 1, characterized in that: The turning motor (79) is a three-phase asynchronous motor.

8. A method for controlling activated carbon in a full-mud cyanidation carbon slurry gold extraction process, using the device for controlling activated carbon in a full-mud cyanidation carbon slurry gold extraction process as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Raw material preparation: crush the gold ore into suitable particle size, and then use a ball mill to grind the crushed ore to make the ore particles finer and increase the exposure area of ​​gold; S2, leaching: adding the ground ore pulp and sodium cyanide solution to the leaching tank (1) for mixing and cyanide leaching. After leaching, adding activated carbon to the ore pulp. The activated carbon can effectively adsorb the gold cyanide complex. Then, the ore pulp is sequentially transported to the subsequent leaching tanks (1) by using the carbon extractor (5). Through multiple groups of leaching tanks, gold leaching and adsorption can be carried out in stages, thereby improving the gold recovery rate. During the transportation process, the carbon density in the ore pulp is detected by the carbon control component every 8 hours. S3, when the carbon density is low: it indicates that the carbon density in the first group of immersion and absorption tanks (1) is low, and the carbon supply amount is controlled by the flow control valve 3 (91), and at the same time, the second group of immersion and absorption tanks (1) is supplemented with corresponding carbon powder according to the carbon supply speed of the carbon supply device (5), so that the carbon density of the slurry entering the second group of immersion and absorption tanks (1) meets the standard; S4. When the carbon density is high: it indicates that the carbon density in the first group of immersion tanks (1) is high. The water replenishment amount is controlled by the second flow control valve (81). At the same time, the slurry inlet pipe (71) and the slurry discharge valve (76) are opened. Part of the slurry is filtered through the filter screen (711). The filtration amount is controlled by the first flow control valve (72) so that the carbon density of the slurry entering the second group of immersion tanks (1) meets the standard.

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