CN206706169U - A kind of device controlled current potential and strengthen leaching gold - Google Patents

Abstract

A device for enhancing gold leaching by controlling electric potential, comprising a kettle body, a stirring structure, a ventilation structure and a control structure; the upper part of the kettle body is provided with a feeding port, the lower part is provided with a bracket, and the bottom part is provided with a valve for controlling the discharge size of the material and a discharge pipe; the stirring structure includes a stirring shaft, a stirring shaft power input mechanism and stirring blades; the ventilation structure includes an air inlet valve, an air inlet flowmeter and a series of ventilation pipes fixed above the still body; the The control structure includes stirring speed frequency conversion controller, pH/potentiometer, dissolved oxygen meter display and dissolved oxygen meter. The utility model can monitor the change of oxygen content and pH value in the solution in real time, adjust the amount of air intake and the amount of additives, accurately control the oxidation-reduction potential value of the solution, and realize efficient and rapid leaching of valuable metals in raw materials.

Description

A device for strengthening immersion gold by controlling electric potential

technical field

The utility model belongs to the field of hydrometallurgy and mining engineering, and in particular relates to a device for controlling electric potential and intensifying leaching of gold.

Background technique

Gold is an internationally accepted currency and is often used in the manufacture of jewelry. Due to its excellent physical and chemical properties, it is also widely used in the electronics industry, chemical industry, and instrumentation manufacturing industry. With the rapid development of my country's national economy and the continuous improvement of people's living standards, the amount of gold required for industrial production and jewelry processing is also increasing year by year, and the scale of gold production continues to expand. Fine-grained gold ore, high impurity content, difficult to handle, and gold-containing secondary materials have become the main raw materials for gold production.

At present, cyanide technology is mainly used to extract gold from raw ore or waste. This technology is simple, effective, economical and stable in system, but the leaching time is long, the efficiency is low, it is highly toxic, and the operation safety is low. If the production system leaks unfortunately, it will damage the surrounding area. The great damage to the environment has caused people to worry about the environment caused by cyanide. Therefore, the tailings formed by cyanide have been listed as hazardous chemicals by the country. The cyanide leaching time is long (the general leaching time is 24 hours to 48 hours), and the leaching rate of cyanide to refractory gold ore is low (the leaching rate is only 70%-80%; and it needs to be pre-grinded, and the particle size reaches -325 mesh. ), such as: sulfide ore, quartz ore, arsenopyrite, etc. With the excessive mining, there are fewer and fewer easy-to-treat gold mines, and even nearly exhausted, while the remaining difficult-to-treat gold mines have higher and higher requirements for gold extraction technology .

There have been many studies on leaching gold with thiourea, each with its own advantages and disadvantages.

In CN1031255A disclosed thiourea iron leaching gold extraction new industrial production process, the particle size of the leaching material needs to be -320 mesh, the leaching time needs 32-40 hours, the crushing takes a long time, the cost is high, and the leaching cycle is too long.

The disclosed method of extracting gold and silver with thiourea in CN1081471A has the advantages of high leaching rate and short production cycle, but the consumption of thiourea in the leaching process is large, and it is unfavorable for manual operation. The low-grade gold in the company does not necessarily have the high grade of gold and silver in its practical operation, and the leaching rate is as high as that of the original ore.

The biological oxidation of the refractory gold concentrate disclosed by CN1544665A-thiourea resin pulp method has the advantages of high leaching rate and low cost, but its pretreatment process is loaded down with trivial details and takes a long time.

CN101338370A discloses a process for extracting gold with thiourea carbon slurry, which has the advantages of high recovery rate and environmental protection, but has the disadvantages of cumbersome operation and long process cycle.

CN102676838A discloses a gold cyanide tailings roasting-ultrasonic enhanced thiourea gold leaching-activated carbon enrichment gold extraction method, which has the advantages of short cycle and high leaching, but it has strong selectivity to materials, and the treatment capacity is small. The content of activated carbon is high, and it cannot be recycled effectively, so that a large amount of thiourea in the tail liquid is lost, and the production cost is high.

Utility model content

The technical problem to be solved by the utility model is to provide a potential-controlled enhanced leaching process with simple operation, high production efficiency, low production cost, short cycle, environmental protection, high tail liquid recycling rate and suitable for processing various refractory gold ores. Gold fixtures.

The technical scheme adopted by the utility model to solve the technical problems is: a device for controlling electric potential to strengthen gold immersion, including a kettle body, a stirring structure, a ventilation structure and a control structure; the upper part of the kettle body is provided with a feeding port, and the lower part There is a bracket, and the bottom is equipped with a valve and a discharge pipe to control the discharge size of the material;

The stirring structure includes a stirring shaft, a stirring shaft power input mechanism and a stirring blade, the stirring shaft is divided into an upper half and a lower half, wherein the lower half of the stirring shaft is located in the kettle body, and the stirring blade includes a stirring paddle Blade I, stirring paddle II, the stirring paddle I is set at the lower part of the stirring shaft, the stirring paddle II is set at the bottom of the stirring shaft, and the stirring shaft power input mechanism is connected with the upper half of the stirring shaft to drive Stirring shaft rotates;

The ventilation structure includes an air inlet valve, an air inlet flowmeter and a series of ventilation pipes fixed on the top of the kettle body; The surface of leaf II, the ventilation pipe is connected with the intake valve, and the total intake volume is controlled by the intake flow meter;

The control structure includes a stirring speed variable frequency controller, a pH/potentiometer, a dissolved oxygen meter display and a dissolved oxygen meter; the stirring speed variable frequency controller is connected with the stirring shaft power input mechanism to accurately control the rotating speed of the stirring shaft; The probes of the oxygen meter are respectively installed on the stirring blade I, and the signal output end of each dissolved oxygen meter is connected with the input end of the display of the dissolved oxygen meter, so that the oxygen concentration values of different layers in the solution can be accurately measured, and the detection results are integrated in the dissolved oxygen meter. Displayed on the oxygen meter display; the pH/potentiometer can accurately measure the real-time pH value and redox potential value in the solution through the electrode probe. The electrode probe is installed in the anti-corrosion pipeline, and the lower end of the anti-corrosion pipeline is equipped with a microporous screen to prevent large particles into the anti-corrosion pipeline.

Further, the data lines between each dissolved oxygen meter and its corresponding probes are set in corresponding safety pipelines.

Further, the pH/potentiometer and the display of the dissolved oxygen meter are both externally connected to an integrated controller.

Further, the inner side of the kettle body is provided with baffles, preferably two or more, to enhance the mutual contact of solution materials.

Further, the outlet pipe is provided with a threaded interface.

The method for using the device to carry out controlled potential enhanced leaching of gold comprises the following steps:

(1) Put the gold-containing material and water into the potential-controlled enhanced gold leaching device, and carry out slurry treatment by passing air while stirring;

(2) After the pulping is completed, adjust the pH value, add thiourea, control the dissolved oxygen in the solution by passing air, add ferric sulfate, and carry out controlled potential enhanced leaching. After the reaction is completed, release the material;

(3) After the material is settled, filtered and separated, the tailings can be stored in a harmless manner; the precious liquid is filtered by metal displacement to obtain gold sludge, and the tailings can be returned to the pulping process for recycling after treatment.

Further, in step (1), the gold-containing raw materials include gold-containing oxide ore, primary gold ore, sulfide gold ore, arsenic-containing gold ore, flotation gold concentrate, gravity separation gold concentrate or various gold ores, The roasted product of gold concentrate.

Further, in step (1), the stirring speed is controlled to be 500-800r/min; the air pressure is controlled to be 0.3-0.8MPa; the slurrying treatment time is 0.3-1.0h. Sufficient contact can realize rapid slurrying of materials.

In step (2), during the enhanced leaching process with controlled potential, the rotation speed of the stirring paddle is controlled by adjusting the frequency converter, and at the same time, the pH/potential meter is used to achieve accurate redox potential of the solution by adjusting the amount of additives added and the amount of dissolved oxygen in the solution. control.

In the controlled potential enhanced leaching process, thiourea (H ₂ NCSNH ₂ ) is an organic complexing agent that is easily soluble in water and can form complexes with many metal ions, and has reducing properties. Thiourea can be oxidized to dithioformamidine (SC(NH ₂ )) in acidic solution. In the presence of oxidizing agents (such as oxygen, Fe ³⁺ ), gold can strongly form coordination cations with thiourea and dissolve rapidly. , which reacts as follows:

4Au + 8H ₂ NCSNH ₂ + O ₂ + 4H ⁺ = 4Au(H ₂ NCSNH ₂ ) ²⁺ + 2H ₂ O.

This reaction formula is the basis of thiourea gold leaching in acidic medium. The leaching process will be affected by many factors, among which the stability of acid thiourea gold leaching system and the selection of oxidant are very important. Au in thiourea solution can form complex ion Au(H ₂ NCSNH ₂ ) ₂ ⁺ , and its standard electrode potential is as follows:

Au(H ₂ NCSNH ₂ ) ₂ ⁺ + e = Au + 2SC(NH ₂ ) ₂ ; E _{Au(H2NCSNH2) 2+/Au} =0.38V;

At the same time, thiourea is prone to oxidation reaction to form dithioformamidine ( ( SCN ₂ H ₃ ) ₂ ). The corresponding standard electrode potential is as follows: (SCN ₂ H ₃ ) ₂ + 2H ⁺ +2e = 2SC(NH ₂ ) ₂ ; E _{(SCN2H3)2/SC(NH2)2} = 0.42V.

The electrode potentials of the above two pairs of electrodes have little difference, which means that a suitable oxidant should be selected for thiourea gold leaching. Oxygen is a suitable oxidant, and the oxygen content in the solution can be controlled by controlling the amount of intake air. The standard electrode potential of Fe ³⁺ is E=0.77V, and it can also be used as an oxidant for acidic thiourea gold leaching. The thiourea gold leaching reaction formula that Fe3 ⁺ participates in is as follows:

Au + 2H ₂ NCSNH ₂ + Fe ³⁺ = Au(H ₂ NCSNH ₂ ) ₂ ⁺ + Fe ²⁺ ;

Excessive Fe ³⁺ will oxidize thiourea to S and S ^2- , resulting in the consumption of thiourea, and S can adsorb thiourea-gold complex, resulting in a decrease in gold leaching rate.

Further, in step (2), sulfuric acid is added to adjust the pH value to 0.5-2.4, the solid-liquid ratio of the added thiourea to the water described in step (1) is 0.2-0.6g:100mL, and the air pressure is 0.1-0.5 MPa, control the dissolved oxygen in the solution at 3.0-8.0mg/L; add ferric sulfate, the solid-liquid ratio of the added ferric sulfate to the water described in step (1) is 0.2-2.0g:100mL, and the solution potential is 250-500mv In this interval, the stirring speed of controlled potential enhanced leaching is 100-450r/min, and the enhanced leaching time is 1.0-5.0h. Under these conditions, the leaching rate of the enhanced leaching process is high, and the concentration of gold ions in the leaching solution can reach 18g/m ³ .

Further, in step (3), the precious liquid is replaced with iron powder, which can react with Au ⁺ , so that Au ⁺ is replaced and precipitated in the form of elemental gold. Preferably, excessive iron powder is added to completely replace Au ⁺ . Experiments have found that when 80-120g of iron powder is added to 1 liter of precious liquid, the Au ⁺ in the precious liquid is basically replaced completely.

Preferably, the replacement reaction time is 1.0 to 3.0 hours, under which the replacement reaction is complete, and a large amount of gold ions are converted into elemental gold. After the reaction, the gold content in the solution is 0.072g/m ³ , the gold replacement rate reaches 99.6%, and the Au ⁺ in the precious solution is basically replaced completely.

Utilize the utility model, adopt the method of controlled electric potential enhanced leaching, along with the increase of leaching time, a large amount of gold elements in the slag enter into the solution, the Au ⁺ concentration in the leaching solution can reach more than 15g/m ³ , realizing the effective enrichment of gold; After the slurry is settled and separated, the tailings can be stored in a harmless manner. After the precious liquid is replaced by metal, the recovery rate of the gold element in the precious liquid is as high as 99.5%. After simple treatment, the tailing liquid can be returned to the slurrying process for recycling.

The method for enhancing leaching of gold by controlling electric potential is a fast, non-toxic and green gold extraction process. The leaching system uses thiourea as the leaching agent for gold extraction. By combining the unique controlled potential enhanced leaching device, the controlled potential enhanced leaching method is used to accurately control the oxygen content and redox potential in the solution according to different mineral characteristics and different concentrations of additives. The leaching of gold in refractory gold ores can be realized at a suitable temperature and temperature. Compared with other non-cyanide gold leaching methods, this method has the advantages of fast leaching speed, mild system conditions, easy control, low reagent cost, and high leaching efficiency. Combined with the unique controlled potential enhanced leaching device, the method of controlled potential enhanced leaching , to achieve efficient leaching of gold elements in refractory gold minerals. The utility model effectively slows down the decomposition of thiourea through the precise control of the redox potential of the solution, improves the gold leaching efficiency and reduces the production cost.

The method of controlled potential enhanced gold leaching combined with a unique controlled potential enhanced gold leaching device overcomes the disadvantages of slow leaching speed and low leaching rate of other non-cyanidation methods such as thiosulfate, and overcomes the severe reaction of the chlorination method that causes gas Operational difficulties and potential safety hazards caused by escape; compared with the iodination method, thiourea reagent is relatively cheap and more economically beneficial. The successful application of this green gold leaching method aims to change the impact of gold extraction on a global scale. The dependence of highly toxic substances has broad application prospects in terms of safety and environmental protection, and has far-reaching significance for the innovation of gold extraction technology.

Compared with the prior art, the utility model has the following advantages:

1. By installing a pH/potentiometer, the pH value and redox potential changes in the solution can be monitored in real time, and then the pH value can be adjusted, the amount of additives and ventilation can be controlled, so as to achieve the purpose of accurately controlling the redox potential in the solution, which is beneficial to the material Efficient leaching of valuable metals, reducing the consumption of materials in the leaching process;

2. A baffle is added inside the kettle body. During the stirring process, part of the solution collides violently with the baffle and diffuses to the surroundings. The thermal movement of the molecules in the solution is enhanced, and the fine particles are in full contact with the baffle, which is beneficial to the leaching reaction of valuable metals;

3. Install the dissolved oxygen meter probe and air outlet on each stirring blade, which can accurately measure the oxygen content in the solution. By adjusting the air intake of the flowmeter, the air outlet of the air outlet can be controlled to make the gas and liquid fully contact. , to ensure that the oxygen capacity in the reaction system is at a stable and appropriate value, which is conducive to the smooth progress of the aerobic leaching reaction;

4. A discharge pipe that can control the size of the discharge is installed under the kettle body. After the reaction is completed, the material can be discharged quickly, avoiding the deposition of materials in the kettle body, and also facilitating the cleaning of the stirring device; the bottom of the discharge port is a threaded interface, which can be The external pipe is convenient for the transfer of materials;

5. The operation is simple and the controllability is strong. It can not only meet the requirements of conventional agitation and leaching of valuable metals, but also be more suitable for the requirements of refined control potential enhanced leaching of valuable metals.

In a word, the utility model adopts the method of controlled potential enhanced leaching, which improves the gold leaching efficiency, shortens the gold extraction cycle, and reduces the process cost, making the method a simple, efficient, low-cost, short-cycle It is an environmentally friendly and suitable gold extraction process for various refractory gold mines, and has considerable development and promotion value.

Description of drawings

Fig. 1 is a schematic structural diagram of a potential-controlled enhanced gold immersion device of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example

With reference to Fig. 1, present embodiment comprises kettle body 8, ventilation structure, control structure and stirring structure; The top of described kettle body 8 is provided with feed inlet 5, and the bottom is provided with support 16, and the bottom is provided with the control material discharging size. Valve 17 and columnar discharge pipe 18;

The stirring structure comprises a stirring shaft 2, a stirring shaft power input mechanism and a stirring paddle, the stirring shaft 2 is divided into an upper half and a lower half, wherein the lower half of the stirring shaft 2 is located in the kettle body 8, and the stirring The blades include stirring blade I11 and stirring blade II15. The stirring blade I11 is arranged at the bottom of the stirring shaft 2, the stirring blade II15 is arranged at the bottom of the stirring shaft 2, and the stirring shaft power input mechanism is connected with the stirring shaft The upper half of the shaft 2 is connected to drive the stirring shaft 2 to rotate;

Described ventilation structure comprises the inlet valve 21 that is fixed on kettle body 8 tops, intake flowmeter 20 and a series of ventilation ducts 13; Described ventilation ducts 13 are provided with a series of vent holes 10, and described ventilation ducts 13 are respectively fixed on The surfaces of the stirring paddle I11 and the stirring paddle II15, the ventilation pipe 13 is connected with the air intake valve 21, and the total air intake volume is controlled by the intake flow meter 20;

The control structure includes a stirring speed variable frequency controller 1, a pH/potentiometer 3, a dissolved oxygen meter display 4 and a dissolved oxygen meter; the stirring speed variable frequency controller 1 is connected with the stirring shaft power input mechanism to accurately control the rotation of the stirring shaft 2 speed; the probes 7 of the dissolved oxygen meter are installed on the stirring paddle I11 respectively, and the signal output end of each dissolved oxygen meter is connected with the input end of the display 4 of the dissolved oxygen meter, so that the oxygen concentration of different layers in the solution can be accurately measured Numerical values and detection results are integrated on the display 4 of the dissolved oxygen meter and displayed; the pH/potentiometer 3 can accurately measure the real-time pH value and redox potential value in the solution through the electrode probe 12, and the electrode probe 12 is installed in the anti-corrosion pipeline 9, The lower end of the pipeline 9 is equipped with a microporous screen 14 to prevent large particles from entering the anticorrosion pipeline.

In this embodiment, the data line 6 between each dissolved oxygen meter and its corresponding probe is set in a corresponding safety pipeline.

In this embodiment, both the pH/potentiometer and the display of the dissolved oxygen meter are externally connected to an integrated controller.

In this embodiment, there are more than two baffles 22 on the inner side of the kettle body 8 to enhance the mutual contact of the solution materials.

In this embodiment, the columnar discharge pipe 18 is provided with a threaded interface 19 .

Application Example 1

The refractory gold ore of a gold smelter was taken as the leaching raw material, and the chemical composition of the refractory gold ore is shown in Table 1.

Table 1 Contents of main elements in refractory gold ores

The main phases of the extracted minerals are gangue (SiO ₂ ) and arsenopyrite (FeAsS), mixed with a small amount of hematite (Fe ₂ 0 ₃ ). The arsenic-containing sulfur minerals are oxidized and destroyed, 96.05% of gold in arsenopyrite is exposed, 80.52% of gold in pyrite and other sulfides are exposed, and 57.05% and 16.54% of iron oxide minerals and silicates are exposed, respectively. The wrapped gold is exposed and the gold in the ore is enriched.

1. Add the refractory gold ore and water into the potentiometric enhanced leaching device according to the ratio of material to liquid 1kg:2L, turn on the frequency conversion controller for stirring speed, control the stirring shaft speed to 600r/min, adjust the air intake valve, and control the air intake The flow meter shows that the ventilation pressure is 0.4MPa, the gas is evenly discharged through the vent holes of the ventilation pipes on each stirring blade, a large number of bubbles are bubbled on the surface of the solution, and the slurrying time is 30 minutes.

2. After the pulping is completed, use sulfuric acid to adjust the pH to 0.9-1.1, add thiourea, the solid-liquid ratio of the added thiourea to the water mentioned in step (1) is 0.4g:100mL, adjust the air inlet valve, and let in air The pressure value is 0.1MPa, and the oxygen dissolved value is obtained through the detection of the probes of the dissolved oxygen meter installed on each stirring blade, and the oxygen content in the solution is 7.1mg/L; adding ferric sulfate, the added thiourea is the same as step (1) The solid-liquid ratio of the water is 0.7g:100mL, at this time, the pH/potentiometer shows that the solution potential is between 250～300mv, and the stirring speed is 300r/min. After the enhanced leaching for 1h, the valve at the bottom of the kettle body is opened to release the material .

3. After the material settles, filters, washes and separates, the filtrate is precious liquid, in which the gold content is 16.5g/m ³ , which is used for subsequent gold extraction. The tailings can be further extracted deeply or stored in a harmless manner, and the leaching is enhanced by controlling the potential The leaching rate of gold element in the stage is 91.87%;

The expensive liquid is replaced with iron powder, the gold replacement rate is 99.64%, and the gold content in the poor liquid is 0.059g/m ³ . After the replacement, the tail liquid can be returned to the pulping process for recycling after treatment.

Application Example 2

Take a gold smelter's disposable gold ore as the leaching raw material, and the chemical composition of the disposable gold ore is shown in Table 2.

Table 2 Contents of main elements in easy-to-treat gold ores

After two-stage roasting pretreatment and grinding operation of the extracted minerals, the arsenic-containing sulfur minerals wrapped in gold are oxidized and destroyed, the gold in iron oxide minerals and silicate is fully exposed, and the gold in the ore is enriched.

1. Add the easy-to-handle gold ore and water into the material in the controlled potential enhanced leaching device according to the ratio of material to liquid 1kg:2L, turn on the frequency conversion controller for stirring speed, control the stirring shaft speed to 700r/min, adjust the intake valve, and control The air inlet flowmeter shows that the ventilation pressure is 0.38MPa, the gas is evenly discharged through the air outlet holes of the ventilation pipes on each stirring blade, a large amount of bubbles are bubbled on the surface of the solution, and the stirring and ventilation are stopped when the pulping time is 45 minutes.

2. After the pulping is completed, use sulfuric acid to adjust the pH to 1.0-1.5, add thiourea, the solid-liquid ratio of the added thiourea to the water described in step (1) is 0.5g:100mL, adjust the air inlet valve, and let in air The pressure value is 0.2MPa, through the detection of the dissolved oxygen meter probe installed on each stirring blade, the oxygen dissolved value is obtained, and the oxygen content in the solution is 6.2mg/L; adding ferric sulfate, the added ferric sulfate is the same as the step (1 ) The solid-liquid ratio of the water is 0.9g:100mL, at this time, the pH/potentiometer shows that the solution potential is between 280 and 330mv, the stirring speed is 250r/min, and after 1.5h of enhanced leaching, open the valve at the bottom of the kettle body, Release the material.

3. After the material settles, filters, washes and separates, the filtrate is precious liquid, and the measured gold content of precious liquid is 18.5g/m ³ , which is used for subsequent gold extraction. The leaching rate of gold element in the potential enhanced leaching stage was 95.12%;

The precious liquid is replaced with iron powder, the gold replacement rate is 99.63%, and the gold content in the poor liquid is 0.068g/m ³ . After the replacement, the tail liquid can be returned to the pulping process for recycling.

Claims (5)

1. A device for controlling potential to strengthen leaching of gold is characterized in that it comprises a kettle body, a stirring structure, a ventilation structure and a control structure; the top of the kettle body is provided with a feed port, the bottom is provided with a support, and the bottom is provided with a control Material discharge valve and discharge pipe; The stirring structure includes a stirring shaft, a stirring shaft power input mechanism and a stirring blade, the stirring shaft is divided into an upper half and a lower half, wherein the lower half of the stirring shaft is located in the kettle body, and the stirring blade includes a stirring paddle Blade I, stirring paddle II, the stirring paddle I is set at the lower part of the stirring shaft, the stirring paddle II is set at the bottom of the stirring shaft, and the stirring shaft power input mechanism is connected with the upper half of the stirring shaft to drive Stirring shaft rotates; The ventilation structure includes an air inlet valve, an air inlet flowmeter and a series of ventilation pipes fixed on the top of the kettle body; The surface of leaf II, the ventilation pipe is connected with the intake valve, and the total intake volume is controlled by the intake flow meter; The control structure includes a stirring speed variable frequency controller, a pH/potentiometer, a dissolved oxygen meter display and a dissolved oxygen meter; the stirring speed variable frequency controller is connected with the stirring shaft power input mechanism to accurately control the rotating speed of the stirring shaft; The probes of the oxygen meter are respectively installed on the stirring blade I, and the signal output end of each dissolved oxygen meter is connected with the input end of the display of the dissolved oxygen meter, so that the oxygen concentration values of different layers in the solution can be accurately measured, and the detection results are integrated in the dissolved oxygen meter. Displayed on the oxygen meter display; the pH/potentiometer can accurately measure the real-time pH value and redox potential value in the solution through the electrode probe. The electrode probe is installed in the anti-corrosion pipeline, and the lower end of the anti-corrosion pipeline is equipped with a microporous screen to prevent large particles into the anti-corrosion pipeline. 2. The device for strengthening gold leaching with controlled potential according to claim 1, characterized in that, the data lines between each dissolved oxygen meter and its corresponding probes are set in corresponding safety pipes. 3. The device for strengthening gold immersion by controlling electric potential according to claim 1 or 2, characterized in that, the pH/potentiometer and the dissolved oxygen meter display are both externally connected to an integrated controller. 4. The device for enhancing gold leaching by controlling electric potential according to claim 1 or 2, characterized in that, the inner side of the kettle body is provided with a baffle to enhance the mutual contact of solution materials. 5. The device for enhancing gold immersion by controlling electric potential according to claim 1 or 2, characterized in that, the discharge pipe is provided with a threaded joint.