Device for dynamically regulating and controlling reciprocating agitation to strengthen leaching of indium-containing materials and leaching method thereof

Abstract

The application discloses a kind of dynamic regulation and control reciprocating stirring intensification leaching indium-containing material device and its leaching method, belong to indium recovery technical field.The device includes stirring tank, is set in the stirring mechanism and steam injection stirring mechanism of stirring tank, control system;Stirring tank is provided with feed inlet, volatile material collection port and discharge port;Stirring mechanism includes with the central shaft of blade from the vertical insertion tank in the top of stirring tank, central shaft top is connected with first motor, in the part of central shaft located outside stirring tank is equipped with gear ring section, is equipped with with gear ring section meshing gear, gear shaft is connected with first motor;In different height in stirring tank, multiple multifunctional sensors for monitoring material concentration, reaction temperature information in real time are respectively installed.The application can effectively improve the recovery efficiency of high indium-containing material, and the leaching rate of indium is as high as 98%.

Description

Technical Field

[0001] This invention relates to the field of valuable metal recycling technology, specifically to a method for recycling materials with high indium content. Background Technology

[0002] Indium, an important strategic rare metal, has wide applications in key areas such as high-end displays, semiconductors, photovoltaic cells, and defense technology. The rapid development of the global technology industry has driven a continuous increase in demand for indium. However, primary indium resources are scarce and highly dispersed, making the recovery of metallic indium from secondary resources a crucial way to ensure the security of its supply chain. High-indium materials have complex compositions; indium often exists in multiphase forms and is accompanied by various impurity elements such as zinc, lead, tin, and iron, posing challenges to its efficient extraction. In hydrometallurgical processes, leaching is the primary and critical step in indium recovery, and its effectiveness directly affects the complexity of subsequent processes and the final recovery rate.

[0003] Currently, the industrial process for recovering indium by wet leaching commonly employs processes such as... Figure 3 The traditional uniform-speed mechanical agitator shown, as the core reaction equipment of the material reactor, consists of an agitation mechanism installed inside the mixing tank A. This mechanism is driven by a central shaft B, which rotates impeller C to achieve agitation. The impeller position remains fixed. However, this system suffers from significant bottlenecks during operation, severely restricting production efficiency and economic benefits. First, the mixing efficiency of the traditional uniform-speed agitation system is low. High-indium-content materials have complex compositions and high densities, easily depositing and forming a stagnant layer at the bottom of the reactor and in other dead zones, resulting in insufficient contact between the high-indium-content material and the leaching agent, leading to poor mass transfer. This not only prolongs the reaction time but also easily causes indium encapsulation, resulting in unstable leaching rates and difficulty in achieving optimal levels. Second, the equipment faces severe corrosion and wear problems. The leaching process is usually carried out under extreme conditions such as high temperature and strong acid, requiring extremely high corrosion resistance from the materials of the agitator, shaft, and mixing tank. The long reaction time in the uniform-speed agitation system further exacerbates corrosion and wear, shortening its service life. Furthermore, this agitation system has consistently high energy consumption. To suppress sedimentation and enhance the mass transfer process, a high-power motor is needed to maintain a high-speed uniform stirring, resulting in high energy consumption, which does not meet the current industrial requirements for green and low-carbon development. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for dynamically controlling automatic reciprocating stirring to enhance the leaching of high indium-containing materials. Through a uniquely designed intelligent stirring leaching device, the position and speed of the stirring paddle and the opening of the steam jet device valve are automatically adjusted according to the real-time changes in the concentration and temperature of the reactants in the stirring tank, so as to improve the leaching and recovery efficiency of high indium-containing materials.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for dynamically controlling reciprocating stirring to enhance the leaching of indium-containing materials includes a frame, a stirring tank installed within the frame, a stirring mechanism installed within the stirring tank, and a steam jet stirring mechanism; the stirring tank is provided with a feed inlet and a volatile material collection port located at the top of the tank, and a discharge port located at the bottom of the tank; The stirring mechanism includes a central shaft that is vertically inserted into the mixing tank from the top of the tank, a blade mounted on the central shaft, the top of the central shaft being connected to the output shaft of a second motor mounted on a frame, and the second motor being connected to a second frequency converter that controls the speed of the first motor. A toothed ring section is provided on the part of the central shaft located outside the mixing tank; a first motor is mounted on the frame, the output shaft of the first motor is in a horizontal position and a gear that meshes with the toothed ring section is installed at the front end, and the first motor is connected to a first frequency converter that controls the speed of the first motor; A control system for controlling the first and second frequency converters is installed on the rack. The first motor controls the reciprocating motion of the central shaft through gear and gear ring segment; the second motor controls the rotation of the central shaft, thereby driving the blade to rotate. The steam jetting and stirring mechanism includes a jetting pipe inserted from the top of the stirring tank to the bottom of the tank for jetting steam, a solenoid valve located on a section of the jetting pipe outside the stirring tank, and a relay for controlling the solenoid valve. Multiple sensors for real-time monitoring of the concentration of high indium-containing materials and reaction temperature are installed at different heights on the inner wall of the mixing tank. The sensors are connected to the control system. Vertical baffles are also spaced apart on the inner wall of the mixing tank.

[0006] Furthermore, the bottom of the mixing tank is a concave arc-shaped bottom.

[0007] Furthermore, the bottom end of the jet pipe of the steam jet stirring mechanism is connected to a rotary nozzle.

[0008] Furthermore, a flue gas treatment device is connected to the volatile material collection port via a pipeline.

[0009] Furthermore, the sensor is a multifunctional sensor capable of monitoring material concentration and reaction temperature.

[0010] The method for enhancing the leaching of indium-containing materials using the apparatus described in this invention comprises the following steps: (1) Hot steam is injected into the mixing tank through the spray pipe of the steam jet stirring mechanism to preheat the mixing tank. After the temperature inside the tank rises to the set value, the indium-containing material is added into the mixing tank and then hydrochloric acid is injected. (2) The second motor is started by the control system to drive the stirring mechanism to rotate and stir the material in the tank; at the same time, the first motor is started, and the first motor drives the gear to rotate forward or reverse. The gear drives the central shaft to rise or fall through meshing with the gear ring section on the central shaft, realizing the reciprocating lifting and lowering of the stirring mechanism, and fully covering the material at each height position in the stirring tank to prevent the local accumulation of indium-containing materials and promote the uniform suspension of indium-containing materials; the steam blown in by the steam jet stirring mechanism also stirs the material at the same time, and the leaching reaction occurs in the tank; the sensor monitors the temperature change during the stirring leaching process in real time, as well as the concentration and distribution position of the material particle aggregation area; (3) After the leaching process is completed, turn off the hot steam of the steam jet stirring mechanism in sequence, stop the first motor and the second motor, the stirring mechanism stops rotating, discharge the reactants from the discharge port and separate the leaching liquid and leaching residue. Take the leaching residue. The indium content in the leaching residue is not less than 55 wt.%.

[0011] Furthermore, the indium-containing material is a high indium-containing material with an indium content greater than 75 wt.%.

[0012] Furthermore, the indium-containing material is first ground and then sieved, and then the indium-containing material with a particle size of 200-400 mesh obtained by sieving is sent into a mixing tank.

[0013] Furthermore, the liquid-solid ratio of the indium-containing material and hydrochloric acid is 3:1-10:1, and the concentration of hydrochloric acid is 3mol / L-6mol / L.

[0014] Furthermore, the temperature for leaching the material in the mixing tank is 50-85℃, and the leaching time is 120-150 minutes.

[0015] The device of this invention can intelligently control two frequency converters through a control system, thereby controlling the start and stop of two motors. The second motor controls the rotation of the stirring mechanism and the material in the tank, while the first motor controls the raising and lowering of the stirring mechanism and the stirring paddle. This allows for the stirring of materials at different heights within the tank, ensuring the stirring range covers materials at all heights. The addition of a steam-jet stirring mechanism, which sprays steam from the bottom of the tank, further enhances the stirring process, effectively increasing the contact area between the indium-containing material and the hydrochloric acid solution, thus significantly improving the indium leaching efficiency. The dual-mode stirring of mechanical agitation and steam jet effectively prevents the indium-containing material from settling and accumulating at the bottom. Multiple multi-functional sensors monitor the concentration of indium-containing material at different heights and the location and temperature distribution of areas with higher concentrations in real time during the stirring process. The collected information is converted into electrical signals and transmitted to the control system. The control system adjusts the speed and rotation time of the two motors in real time based on the sensor information and their positions, thereby controlling the speed and reciprocating motion of the stirring mechanism. Baffles spaced along the inner wall of the tank further enhance the axial mixing capacity of the mixture.

[0016] Compared with existing technologies, the device and its enhanced leaching method of the present invention can automatically adjust the position, speed, and opening of the stirring paddle and the solenoid valve according to the real-time changes in the concentration and temperature of the reactants in the stirred tank, thereby improving the leaching and recovery efficiency of high indium-containing materials, comprehensively improving reaction efficiency, and shortening process time. The indium leaching rate can reach up to 98%, while the indium leaching rate of a material reactor using a single traditional uniform-speed mechanical stirrer can only reach a maximum of 91%. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the device structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the gear meshing with the ring gear segment as viewed from direction A; Figure 3 This is a schematic diagram of a traditional uniform-speed mechanical stirrer. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, equivalent technical substitutions obtained by those skilled in the art without inventive effort are all within the protection scope of the present invention. Example 1

[0019] like Figure 1 As shown, a device for dynamically controlled reciprocating stirring to enhance the leaching of indium-containing materials includes a frame 1, a stirring tank 2 disposed within the frame, a stirring mechanism and a steam-jet stirring mechanism disposed within the stirring tank. The stirring tank has a feed inlet 14 and a volatile material collection port 17 located at the top of the tank, and a discharge port 18 located at the bottom of the tank. The feed inlet is equipped with an openable and closable cover. The discharge port is equipped with a control valve 18a. The volatile material collection port 17 is connected to a flue gas treatment device 19 via a pipeline. The flue gas treatment device can be any existing flue gas treatment device, such as a spray absorption tower. The bottom of the stirring tank is a concave arc-shaped bottom, which facilitates material discharge and prevents the formation of dead corners for material accumulation.

[0020] The stirring mechanism includes a central shaft 4 vertically inserted into the mixing tank from the top, and blades 16 mounted on the central shaft. The top of the central shaft is connected to the output shaft of a second motor 11 mounted on a frame. The second motor is connected to a second frequency converter 12 that controls the speed of the first motor. The blades 16 can adopt a blade structure commonly used in existing technology.

[0021] like Figure 1 , Figure 2As shown, a toothed ring section 4a is provided on the part of the central shaft 4 located outside the mixing tank; a first motor 10 is installed on the frame 1, the output shaft of the first motor is in a horizontal position and a gear 13 that meshes with the toothed ring section 4a is installed at the front end, and the first motor is connected to a first frequency converter 5 that controls the speed of the first motor.

[0022] A control system 9 for controlling the first frequency converter 1 and the second frequency converter 12 is installed on the frame.

[0023] The first motor 10 controls the reciprocating motion of the central shaft 4 through the gear 13 and the gear ring segment 4a, which can drive the blade to rise and fall; the second motor 11 controls the rotation of the central shaft 4, thereby driving the blade 16 to rotate.

[0024] The steam injection and stirring mechanism includes a jet pipe 6 inserted from the top of the mixing tank to the bottom for injecting steam, a solenoid valve 7 located on the section of the jet pipe outside the mixing tank, and a relay 8 for controlling the solenoid valve. A rotary nozzle 6a is connected to the bottom end of the jet pipe 6. A steam generating device, such as a steam tank or steam generator commonly used in the prior art, is connected to the air inlet end of the jet pipe.

[0025] Multiple sensors 15 for real-time monitoring of material information are installed at different heights on the inner wall of the mixing tank, and the sensors are connected to the control system 9. The sensors 15 are multifunctional sensors that can detect material concentration and temperature information, such as the WS3051MD-ND39 high-temperature concentration meter, the CZ-H series high-temperature concentration sensor, etc. Vertical baffles 3 are also spaced along the inner wall of the mixing tank to improve the axial mixing capacity of the mixture.

[0026] The control system used in the device of the present invention can be designed using existing technical methods. The control system is used to control the first motor, the second motor, the first frequency converter, the second frequency converter, sensors, relays, solenoid valves, control valves and other devices that need to be controlled by the control system. This does not pose any technical difficulty for those skilled in the art.

[0027] The method for enhancing the leaching of indium-containing materials using the aforementioned dynamically controlled reciprocating stirring apparatus comprises the following steps: (1) Grind the high indium content material with an indium content of not less than 75 wt.% and then screen it to obtain indium content material with a particle size of 200-400 mesh; (2) Hot steam is injected into the mixing tank 2 through the spray pipe 6 of the steam jet stirring mechanism to preheat the mixing tank. After the temperature inside the tank rises to the set value (usually reaching 50°C), the indium-containing material is added into the mixing tank through the feed port 14, and then hydrochloric acid is injected. The liquid-solid ratio of the indium-containing material and hydrochloric acid is 3:1-10:1, and the concentration of hydrochloric acid is 3mol / L-6mol / L. (3) The second motor 11 is started by the control system 9, which drives the stirring mechanism to rotate and stir the material in the tank. At the same time, the first motor 10 is started, which drives the gear 13 to rotate forward or backward. The gear drives the central shaft to rise or fall by meshing with the gear ring section on the central shaft, thereby realizing the reciprocating lifting and lowering of the stirring mechanism, improving the axial mixing capacity of multiphase materials, and fully covering the materials at various height positions in the stirring tank to prevent the local accumulation of indium-containing materials and promote the uniform suspension of indium-containing materials. The central shaft steam jet stirring mechanism heats the materials in the stirring tank by hot steam jetting, and at the same time, it uses a rotary nozzle to swirl and stir the materials. The tangential swirling effect of the steam and the rotation of the blades of the stirring mechanism produce a synergistic effect, which breaks the steam into smaller bubbles, enhances the nonlinear flow in the reaction system, and allows the materials to fully carry out the leaching reaction. Multiple sensors 15 located at different heights monitor the temperature changes of materials at different heights during the stirring leaching process in real time, as well as the concentration and distribution of material particle aggregation areas. The detection signals are fed back to the control system. When the material temperature is below the set value, the control system controls the solenoid valve 7 to increase its opening. When the temperature is above the set value by a certain range, the solenoid valve opening is reduced or closed accordingly. When a high concentration of aggregated material particles is detected, the first and second frequency converters are controlled to increase the speed of the first motor and the frequency of forward and reverse rotation, as well as the speed of the second motor. When a relatively uniform distribution of material particles is detected, the speed of the first motor and the frequency of forward and reverse rotation, as well as the speed of the second motor, are reduced. The temperature for stirring and leaching the material in the mixing tank is controlled at 50-85℃, and the reaction time is 120-150 minutes. During continuous stirring, hydrochloric acid and indium-containing materials are fully mixed and contacted, resulting in a complete leaching reaction. (4) After the leaching process is completed, turn off the hot steam of the steam jet stirring mechanism in sequence, stop the first motor and the second motor, and the stirring mechanism stops rotating. Discharge the reactants from the discharge port 18 and separate the leaching liquid and leaching residue. Take the leaching residue. The indium content in the leaching residue shall not be less than 55 wt.%. The leaching liquid can be recycled and reused.

[0028] In this embodiment of the invention, the high-indium-content material is obtained by crushing and ball milling waste ITO targets, and the leaching agent is industrial hydrochloric acid. The main constituent elements and their contents in the waste ITO targets are shown in Table 1.

[0029] Table 1 Example 2

[0030] A method for dynamically controlling automatic reciprocating stirring to enhance the leaching of high indium content materials includes the following steps: Waste ITO targets were crushed and ground into powder to obtain ITO target powder with a particle size between 200-400 mesh. Simultaneously, a 3 mol / L hydrochloric acid solution was prepared. 1000 g of high-indium-content waste powder was weighed and added to the apparatus described in Example 1. Hydrochloric acid solution was added at a liquid-to-solid ratio of 10:1, and the leaching reaction temperature was controlled at approximately 70°C for a reaction time of 120 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 2. Comparative Example 1

[0031] The same 200-400 mesh ITO target powder and 3 mol / L hydrochloric acid solution as in Example 2 were used. 1000 g of high-indium-content waste powder was weighed and added to the solution as described in Example 2. Figure 3 In the conventional uniform mechanical stirrer shown, hydrochloric acid solution was added at a liquid-to-solid ratio of 10:1, and the leaching reaction temperature was controlled at approximately 70℃ for 120 minutes. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 2.

[0032] Table 2

[0033] Example 3

[0034] A method for dynamically controlling automatic reciprocating stirring to enhance the leaching of high indium content materials includes the following steps: Waste ITO target material was crushed and ground into powder to obtain ITO target powder with a particle size between 200-400 mesh. Simultaneously, a 6 mol / L hydrochloric acid solution was prepared. 1000 g of high-indium-content waste powder was weighed and added to the apparatus described in Example 1. Hydrochloric acid solution was added at a liquid-to-solid ratio of 3:1, and the leaching reaction temperature was controlled at approximately 85°C for 130 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 3. Comparative Example 2

[0035] The same 200-400 mesh ITO target powder and 4 mol / L hydrochloric acid solution as in Example 3 were used. 1000 g of high-indium-content waste powder was weighed and added to a conventional uniform-speed mechanical stirrer. Hydrochloric acid solution was added at a liquid-to-solid ratio of 3:1, and the leaching reaction temperature was controlled at approximately 85°C for 130 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 3.

[0036] Table 3

[0037] Example 4

[0038] A method for dynamically controlling automatic reciprocating stirring to enhance the leaching of high indium content materials includes the following steps: Waste ITO target material was crushed and ground into powder to obtain ITO target powder with a particle size between 200-400 mesh. Simultaneously, a 5 mol / L hydrochloric acid solution was prepared. 1000 g of high-indium-content waste powder was weighed and added to the apparatus described in Example 1. Hydrochloric acid solution was added at a liquid-to-solid ratio of 8:1, and the leaching reaction temperature was controlled at approximately 80°C for a reaction time of 130 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 3. Comparative Example 3

[0039] The same 200-400 mesh ITO target powder and 5 mol / L hydrochloric acid solution as in Example 4 were used. 1000 g of high-indium-content waste powder was weighed and added to a conventional uniform-speed mechanical stirrer. Hydrochloric acid solution was added at a liquid-to-solid ratio of 8:1, and the leaching reaction temperature was controlled at approximately 80°C for 130 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 4.

[0040] Table 4

[0041] Example 5

[0042] A method for dynamically controlling automatic reciprocating stirring to enhance the leaching of high indium content materials includes the following steps: Waste ITO targets were crushed and ground into powder to obtain ITO target powder with a particle size of 200-400 mesh. Simultaneously, a 5 mol / L hydrochloric acid solution was prepared. 1000 g of high-indium-content waste powder was weighed and added to the apparatus described in Example 1. Hydrochloric acid solution was added at a liquid-to-solid ratio of 10:1, and the leaching reaction temperature was controlled at approximately 55°C for a reaction time of 150 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 5. Comparative Example 4

[0043] The same 200-400 mesh ITO target powder and 5 mol / L hydrochloric acid solution as in Example 5 were used. 1000 g of high-indium-content waste powder was weighed and added to a conventional uniform-speed mechanical stirrer. Hydrochloric acid solution was added at a liquid-to-solid ratio of 10:1, and the leaching reaction temperature was controlled at approximately 55°C for 150 min. The reactants were separated to obtain leaching residue. The indium content in the leaching residue was measured to determine the indium leaching rate, and the results are shown in Table 5.

[0044] Table 5

[0045] The apparatus and method of the present invention are particularly suitable for processing high indium content materials with an indium content greater than 75 wt.%.

[0046] Unless otherwise stated, all percentages mentioned in this invention are mass percentages.

Claims

1. A device for dynamically controlling reciprocating stirring to enhance the leaching of indium-containing materials, and a method for enhancing the leaching of indium-containing materials, characterized in that, The device includes a frame (1), a mixing tank (2) installed in the frame, a mixing mechanism and a steam jet mixing mechanism installed in the mixing tank; the mixing tank is provided with a feed inlet (14) and a volatile material collection port (17) located at the top of the tank, and a discharge port (18) located at the bottom of the tank. The stirring mechanism includes a central shaft (4) that is vertically inserted into the tank from the top of the stirring tank, and a blade (16) mounted on the central shaft. The top of the central shaft is connected to the output shaft of a second motor (11) mounted on the frame. The second motor is connected to a second frequency converter (12) that controls the speed of the second motor. A toothed ring section (4a) is provided on the part of the central shaft (4) located outside the mixing tank; a first motor (10) is installed on the frame (1), the output shaft of the first motor is in a horizontal position and a gear (13) that meshes with the toothed ring section (4a) is installed at the front end; the first motor is connected to a first frequency converter (5) that controls the speed of the first motor. A control system (9) for controlling the first frequency converter (5) and the second frequency converter (12) is installed on the rack. The first motor (10) controls the reciprocating motion of the central shaft (4) through gear (13) and gear ring segment (4a); the second motor (11) controls the rotation of the central shaft (4) and thus drives the blade (16) to rotate. The steam jetting and stirring mechanism includes a jetting pipe (6) inserted from the top of the stirring tank to the bottom of the tank for jetting steam, a solenoid valve (7) located on a section of the jetting pipe outside the stirring tank, and a relay (8) for controlling the solenoid valve. Multiple sensors (15) for real-time monitoring of material concentration and reaction temperature are installed at different heights on the inner wall of the mixing tank. The sensors are connected to the control system (9). Vertical baffles (3) are also provided at intervals on the inner wall of the mixing tank. The steps are as follows: (1) Hot steam is injected into the mixing tank through the spray pipe of the steam jet stirring mechanism to preheat the mixing tank. After the temperature inside the tank rises to the set value, the indium-containing material is added into the mixing tank and then hydrochloric acid is injected. (2) The second motor is started by the control system to drive the stirring mechanism to rotate and stir the material in the tank; at the same time, the first motor is started, and the first motor drives the gear to rotate forward or reverse. The gear drives the central shaft to rise or fall through meshing with the gear ring section on the central shaft, realizing the reciprocating lifting and lowering of the stirring mechanism, and fully covering the material at each height position in the stirring tank to prevent the local accumulation of indium-containing materials and promote the uniform suspension of indium-containing materials; the steam blown in by the steam jet stirring mechanism also stirs the material at the same time, and the leaching reaction occurs in the tank; the sensor monitors the temperature change during the stirring leaching process in real time, as well as the concentration and distribution position of the material particle aggregation area; (3) After the leaching process is completed, turn off the hot steam of the steam jet stirring mechanism in sequence, stop the first motor and the second motor, the stirring mechanism stops rotating, discharge the reactants from the discharge port and separate the leaching liquid and leaching residue. Take the leaching residue. The indium content in the leaching residue is not less than 55 wt.%.

2. The method for enhancing the leaching of indium-containing materials according to claim 1, characterized in that, The bottom of the mixing tank (2) is a concave arc-shaped bottom.

3. The method for enhancing the leaching of indium-containing materials according to claim 1 or 2, characterized in that, The bottom end of the jet pipe (6) of the steam jet stirring mechanism is connected to a rotary nozzle.

4. The method for enhancing the leaching of indium-containing materials according to claim 1 or 2, characterized in that, A flue gas treatment device (19) is connected to the volatile material collection port (17) via a pipeline.

5. The method for enhancing the leaching of indium-containing materials according to claim 1 or 2, characterized in that, The sensor (15) is a multifunctional sensor that can monitor material concentration and reaction temperature.

6. The method for enhancing the leaching of indium-containing materials according to claim 1, characterized in that, The indium-containing material is a high indium-containing material with an indium content greater than 75 wt.%.

7. The method for enhancing the leaching of indium-containing materials according to claim 1 or 6, characterized in that, First, the indium-containing material is ground and then sieved. Then, the indium-containing material with a particle size of 200-400 mesh obtained from sieving is sent into a mixing tank.

8. The method for enhancing the leaching of indium-containing materials according to claim 1 or 6, characterized in that, The liquid-solid ratio of indium-containing material and hydrochloric acid is 3:1-10:1, and the concentration of hydrochloric acid is 3mol / L-6mol / L.

9. The method for enhancing the leaching of indium-containing materials according to claim 1 or 6, characterized in that, The temperature for leaching the material in the mixing tank is 50-85℃, and the leaching time is 120-150 minutes.

Images