Ionic liquid leaching precious metal strengthening device based on multiple leaching

Abstract

The utility model discloses an ionic liquid leaching precious metal strengthening device based on multiple leaching, which comprises an aluminum alloy frame, a feeding unit, a leaching unit and a separating unit are sequentially arranged in the aluminum alloy frame from left to right, and the leaching unit comprises a tank reactor, an ultrasonic generator and a microwave radiation generator. The feeding unit is connected with the kettle type reactor and is used for completing feeding of the kettle type reactor; the kettle type reactor sequentially moves to the ultrasonic generator and the microwave radiation generator to complete leaching of a reaction mixture, and the kettle type reactor completing leaching is connected with the separation unit. The feeding unit comprises a solid feeder and a liquid feeding tank, wherein the solid feeder and the liquid feeding tank are fixedly installed on the aluminum alloy frame and used for feeding powder or other solid particles. A material conveying pump is arranged above the liquid feeding tank, and a pipeline with a valve is arranged below the liquid feeding tank. According to the utility model, the single light-weight movable kettle type reactor is adopted, and the portable and movable ultrasonic generator and microwave radiation generator are introduced, so that the material transfer process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of precious metal recovery, in particular to a precious metal leaching enhancement device based on multiple leaching of ionic liquids. Background Art

[0002] Precious metals such as gold, silver, and platinum hold significant value and are widely used in industry and commerce. These metals possess excellent electrical conductivity, corrosion resistance, and chemical stability, making them widely used in electronics, jewelry, chemical catalysts, and other fields. Their scarcity and high value make them a vital resource, making their effective recovery and reuse crucial for resource conservation and environmental protection.

[0003] As green, environmentally friendly solvents, ionic liquids (ILs) possess excellent solubility, selectivity, and stability, and are widely used in metal extraction and separation. By using ILs as leaching solutions, efficient recovery of precious metals can be achieved, reducing reliance on traditional organic solvents and minimizing environmental pollution. While there have been several studies on the use of ILs for precious metal recovery, existing technologies still face challenges, such as complex equipment, inconvenient operation, high energy consumption, and low mass transfer efficiency due to the inherent high viscosity of ILs, resulting in prolonged and incomplete leaching of precious metals.

[0004] Therefore, it is necessary to design a new type of precious metal leaching enhancement device based on ionic liquid technology to achieve efficient and environmentally friendly precious metal recovery leaching steps. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides an ionic liquid leaching precious metal enhancement device based on multiple leaching. Its design covers all steps of feeding, leaching and separation. It is continuous and simple to operate, has low energy consumption and good environmental protection. It can be widely used in the field of precious metal recovery and has important application and promotion value.

[0006] The technical solution adopted in this utility model is:

[0007] A device for leaching precious metals using an ionic liquid based on multiple leaching, comprising an aluminum alloy frame (24), characterized in that a feeding unit, a leaching unit and a separation unit are sequentially arranged inside the aluminum alloy frame (24) from left to right, the leaching unit comprising a kettle reactor (4), an ultrasonic generator (5) and a microwave radiation generator (10), the feeding unit being connected to the kettle reactor (4) to complete the feeding of the kettle reactor (4); the kettle reactor (4) being moved sequentially to the ultrasonic generator (5) and the microwave radiation generator (10) to complete the leaching of the reaction mixture, and the kettle reactor (4) that has completed the leaching being connected to the separation unit.

[0008] Furthermore, the feeding unit comprises a solid feeder (1) for feeding powder or other solid particles and a liquid feed tank (2) mounted and fixed on an aluminum alloy frame (24); a material delivery pump (25) is provided above the liquid feed tank (2), and a pipeline (3) with a valve is provided below the liquid feed tank (2).

[0009] Furthermore, the ultrasonic generator (5) is controlled by an external ultrasonic source (6). The ultrasonic generator (5) is fixedly mounted on the aluminum alloy frame (24) via a fixing buckle (7). When in use, the ultrasonic generator is removed and moved to the interior of the autoclave reactor (4), and the fixed position is adjusted according to actual needs.

[0010] Furthermore, a metal frame (14) is provided on one side of the bottom of the microwave radiation generator (10) near the separation unit, and a sealed cover (13) is provided on the metal frame (14). When the kettle reactor (4) moves to the bottom of the microwave radiation generator (10), the sealed cover (13) is fixed on the top of the kettle reactor (4); the sealed cover (13) is provided with a temperature sensor (8), a pressure sensor (12) and a mechanical stirring paddle (15). The lower end of the mechanical stirring paddle (15) passes through the sealed cover (13) and extends into the interior of the kettle reactor (4), and the upper end of the mechanical stirring paddle (15) is transmission-connected to the output end of the mechanical stirrer (9).

[0011] Furthermore, the inner layer of the kettle reactor (4) is a microwave shielding layer (17), one end of the microwave radiation generator (10) passes through the sealed cover (13) and extends into the interior of the kettle reactor (4), and a rod-shaped radiation head (16) is provided at the end thereof, and the other end of the microwave radiation generator (10) is connected to an external microwave radiation generating source (11).

[0012] Furthermore, the separation unit includes a membrane separation component (21), a separation membrane is provided inside the membrane separation component (21), the top of the separation component (21) is connected to the kettle reactor (4) and the permeate collection tank (23) respectively through a three-way valve (20), and the bottom of the separation component (21) is connected to the solid waste collector (22) through a pipeline and a valve.

[0013] Furthermore, the tank reactor (4) is connected to the membrane separation component (21) through a valve, a pipeline, a material delivery pump and a pressure gauge (19).

[0014] Furthermore, a flushing pipe (26) with a valve leading to the solid feeder (1) is provided on the upper portion of the liquid feed tank (2), so as to facilitate flushing of the solid feeder.

[0015] Furthermore, a visible transparent strip is provided on the surface of the liquid feed tank (2), the material of the liquid feed tank (2) is selected from one of stainless steel, fiberglass or polytetrafluoroethylene, and the volume is 3-5L.

[0016] Furthermore, the material of the kettle reactor (4) is selected from stainless steel or Hastelloy, and the capacity is 1.5-2L, and can perform high temperature and high pressure leaching steps.

[0017] Furthermore, the power of the ultrasonic generator is adjustable between 50-500W, and the ultrasonic frequency is adjustable between 100-300kHz; the power of the microwave radiation generator is adjustable between 50-500W, and the microwave frequency is 2500MHz.

[0018] Furthermore, the maximum temperature range and the maximum pressure range of the temperature sensor and the pressure sensor are 300° C. and 6 MPa, respectively.

[0019] Furthermore, the separation membrane is a microfiltration membrane or other suitable membrane materials, which is specifically determined according to the characteristics of the substances to be separated in the ionic liquid and the solid waste.

[0020] Furthermore, the material of the permeate collection tank is selected from stainless steel, fiberglass or polytetrafluoroethylene, and its volume is 2-3L, which protects the collection tank from being corroded by the ionic liquid and is stable and durable.

[0021] The utility model combines multiple leaching technologies and utilizes multiple leaching to achieve efficient leaching of precious metals with ionic liquids; through structural design and device adjustment, material transfer is reduced, the preparation process is simplified, production efficiency and product yield are improved, and the simple, efficient and continuous operation of the ionic liquid leaching process of precious metals is achieved, providing an integrated device suitable for ionic liquid leaching systems.

[0022] Compared with the prior art, the beneficial effects of the present invention are embodied in:

[0023] 1. The utility model adopts a single lightweight movable kettle reactor, introduces a portable and movable ultrasonic generator and a rod-shaped microwave radiation generator, reduces the material transfer process, and flexibly adjusts the reaction conditions to address the problems of high inherent viscosity of ionic liquids, low mass transfer efficiency, and the corresponding long time and incomplete leaching of precious metals. Through structural design and device adjustment of the leaching equipment, the utility model adopts a single lightweight movable kettle reactor, introduces a portable and movable ultrasonic generator and a rod-shaped microwave radiation generator, reduces the material transfer process, and flexibly adjusts the reaction conditions.

[0024] 2. The utility model integrates ultrasonic mixed leaching, microwave radiation leaching and pressurized leaching, combining multiple leaching technologies to optimize the reaction conditions for leaching precious metals with ionic liquids, improve reaction efficiency and product yield; coupled design, combined with necessary feeding and solid-liquid separation steps, overall realizes efficient leaching and effective collection of precious metals with ionic liquids.

[0025] 3. The utility model uses ultrasound to achieve full mixing and infiltration of ionic liquid and the sample to be processed, so that the precious metals are initially leached; then it uses internal microwave radiation heating, a closed high-pressure environment and mechanical stirring to achieve efficient energy transfer and improve mass transfer, thereby improving the efficiency of precious metal leaching. Multiple leaching technologies are combined to achieve multiple leaching.

[0026] 4. The coupled design of the equipment of the utility model integrates the feeding and solid-liquid separation equipment, simplifies the feeding and separation steps, and simultaneously utilizes the membrane separation component for multiple cycles of membrane separation and secondary leaching of solid waste to achieve efficient leaching and effective collection.

[0027] 5. This utility model focuses on optimizing the leaching and mass transfer efficiency of ionic liquids in precious metal recovery. By reducing material transfer, optimizing reaction conditions, and improving operational convenience, the device is expected to improve production efficiency, reduce costs, and promote the application and development of ionic liquid leaching technology in the field of precious metal extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the device of the present utility model.

[0029] Among them: 1- solid feeder, 2- liquid feed tank, 3- valve, 4- kettle reactor, 5- ultrasonic generator, 6- ultrasonic source, 7- fixing clip, 8- temperature sensor, 9- mechanical stirrer, 10- microwave radiation generator, 11- microwave radiation source, 12- pressure sensor, 13- airtight cover, 14- metal frame, 15- mechanical stirring paddle, 16- rod-shaped radiation head, 17- microwave shielding layer, 18- material delivery pump, 19- pressure gauge, 20- three-way valve, 21- membrane separation component, 22- solid waste collector, 23- permeate collection tank, 24- aluminum alloy frame, 25- material delivery pump, 26- pipeline with valve. DETAILED DESCRIPTION

[0030] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not intended to limit the embodiment of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0033] A device for leaching precious metals with an ionic liquid based on multiple leaching comprises an aluminum alloy frame 24. A feeding unit, a leaching unit and a separation unit are sequentially arranged inside the aluminum alloy frame 24 from left to right. The leaching unit comprises a kettle reactor 4, an ultrasonic generator 5 and a microwave radiation generator 10. The feeding unit is connected to the kettle reactor 4 to complete the feeding of the kettle reactor 4. The kettle reactor 4 moves sequentially to the ultrasonic generator 5 and the microwave radiation generator 10 to complete the leaching of the reaction mixture. The kettle reactor 4 that completes the leaching is connected to the separation unit.

[0034] In one embodiment, the feeding unit includes a solid feeder 1 for feeding powder or other solid particles and a liquid feed tank 2 mounted and fixed on an aluminum alloy frame 24; a material conveying pump 25 is provided above the liquid feed tank 2, and a pipe 3 with a valve is provided below.

[0035] In one embodiment, the ultrasonic generator 5 is controlled by an external ultrasonic source 6, and the ultrasonic generator 5 is fixedly mounted on the aluminum alloy frame 24 by a fixing buckle 7. When in use, the ultrasonic generator is removed and moved to the inside of the kettle reactor 4, and then the fixed position is adjusted according to actual needs.

[0036] In one embodiment, a metal frame 14 is provided on the side below the microwave radiation generator 10 close to the separation unit, and a sealed cover 13 is provided on the metal frame 14. When the kettle reactor 4 moves to the bottom of the microwave radiation generator 10, the sealed cover 13 is fixed to the top of the kettle reactor 4; the sealed cover 13 is provided with a temperature sensor 8, a pressure sensor 12 and a mechanical stirring paddle 15, the lower end of the mechanical stirring paddle 15 passes through the sealed cover 13 and extends into the interior of the kettle reactor 4, and the upper end of the mechanical stirring paddle 15 is transmission-connected to the output end of the mechanical stirrer 9.

[0037] In one embodiment, the inner layer of the kettle reactor 4 is a microwave shielding layer 17, one end of the microwave radiation generator 10 passes through the sealed cover 13 and extends into the interior of the kettle reactor 4, and a rod-shaped radiation head 16 is provided at the end, and the other end of the microwave radiation generator 10 is connected to an external microwave radiation source 11.

[0038] In one embodiment, the separation unit includes a membrane separation component 21, a separation membrane is provided inside the membrane separation component 21, the top of the separation component 21 is connected to the kettle reactor 4 and the permeate collection tank 23 through a three-way valve 20, and the bottom of the separation component 21 is connected to the solid waste collector 22 through a pipeline and a valve.

[0039] In one embodiment, the tank reactor 4 is connected to the membrane separation component 21 through a valve, a pipeline, a material delivery pump and a pressure gauge 19.

[0040] In one embodiment, a flushing pipe 26 with a valve leading to the solid feeder 1 is provided on the upper portion of the liquid feed tank 2 to facilitate flushing the solid feeder.

[0041] In one embodiment, a visible transparent strip is provided on the surface of the liquid feed tank 2 , and the material of the liquid feed tank 2 is selected from stainless steel, fiberglass or polytetrafluoroethylene, and the volume is 3-5L.

[0042] In one embodiment, the material of the autoclave reactor 4 is selected from stainless steel or Hastelloy, and has a capacity of 1.5-2 L, and can perform a high-temperature and high-pressure leaching step.

[0043] In one embodiment, the power of the ultrasonic generator is adjustable from 50 to 500 W, and the ultrasonic frequency is adjustable from 100 to 300 kHz; the power of the microwave radiation generator is adjustable from 50 to 500 W, and the microwave frequency is 2500 MHz.

[0044] In one embodiment, the maximum temperature range and the maximum pressure range of the temperature sensor and the pressure sensor are 300° C. and 6 MPa, respectively.

[0045] In one embodiment, the separation membrane is a microfiltration membrane or other suitable membrane materials, which are specifically determined according to the characteristics of the substances to be separated in the ionic liquid and the solid waste.

[0046] In one embodiment, the permeate collection tank is made of a material selected from stainless steel, fiberglass or polytetrafluoroethylene, and has a volume of 2-3 L, which protects the collection tank from being corroded by the ionic liquid and is stable and durable.

[0047] The working principle of this utility model is as follows:

[0048] When feeding, first put the solid sample to be tested into the solid feeder, and then directly or in batches into the autoclave reactor below. Then the liquid enters the solid feeder through the pipeline to flush the solid sample remaining inside it. Then the autoclave reactor is directly moved to the bottom of the liquid feed tank, and the pipeline valve below the liquid feed tank is opened to complete the feeding of the corresponding ionic liquid.

[0049] After the solid and liquid raw materials are fed, the ultrasonic generator can be placed in the autoclave reactor. The solid-liquid mixture in the autoclave reactor is mixed, homogenized and preliminarily infiltrated under the action of ultrasound, and the ultrasonic frequency can be adjusted by an external ultrasonic generator. After the ultrasonic mixing and infiltration is completed, the sealed cover is installed on the autoclave reactor. Subsequently, under the action of internal microwave radiation heating, a closed high-pressure environment and mechanical stirring, the reaction mixture is further leached. The equipped temperature sensor and pressure sensor can monitor the temperature and pressure inside the reactor in real time, and the microwave radiation intensity can be controlled by an external microwave radiation generator.

[0050] Finally, the leached reaction mixture can be pumped into the membrane separation module. At this point, the three-way valve is opened toward the autoclave reactor, and the permeate from the initial separation returns to the autoclave reactor. The permeate then enters the membrane separation module again under the action of the material pump for secondary separation. After repeated cycles, the three-way valve is opened toward the permeate collection tank, where the ionic liquid mixed solution containing precious metals, which has undergone multiple separations, is collected. The valve below the membrane separation module is opened, and the solid residue is collected in a solid waste collector. Finally, the residue can be transferred to the autoclave reactor, and after adding a certain amount of ionic liquid through the liquid feed tank, the ultrasonic leaching, microwave radiation leaching, and other leaching steps are repeated to perform secondary leaching, effectively collecting precious metals.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for leaching precious metals using ionic liquids based on multiple leaching, comprising an aluminum alloy frame (24), characterized in that: A feeding unit, a leaching unit and a separation unit are sequentially arranged inside the aluminum alloy frame (24) from left to right. The leaching unit includes a kettle reactor (4), an ultrasonic generator (5) and a microwave radiation generator (10). The feeding unit is connected to the kettle reactor (4) to complete the feeding of the kettle reactor (4); the kettle reactor (4) moves to the ultrasonic generator (5) and the microwave radiation generator (10) in sequence to complete the leaching of the reaction mixture, and the kettle reactor (4) that completes the leaching is connected to the separation unit.

2. The ionic liquid leaching precious metal strengthening device based on multiple leaching according to claim 1, characterized in that: The feeding unit comprises a solid feeder (1) for feeding powder or solid particles and a liquid feeding tank (2) mounted and fixed on an aluminum alloy frame (24); a material delivery pump (25) is provided above the liquid feeding tank (2), and a pipeline (3) with a valve is provided below the liquid feeding tank (2).

3. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 1, characterized in that: The ultrasonic generator (5) is controlled by an external ultrasonic generator (6). The ultrasonic generator (5) is fixedly mounted on the aluminum alloy frame (24) via a fixing buckle (7). When in use, the ultrasonic generator is removed and moved to the inside of the kettle reactor (4), and the fixed position is adjusted according to actual needs.

4. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 1, characterized in that: A metal frame (14) is provided on one side of the bottom of the microwave radiation generator (10) near the separation unit, and a sealed cover (13) is provided on the metal frame (14). When the kettle reactor (4) moves to the bottom of the microwave radiation generator (10), the sealed cover (13) is fixed on the top of the kettle reactor (4); the sealed cover (13) is provided with a temperature sensor (8), a pressure sensor (12) and a mechanical stirring paddle (15). The lower end of the mechanical stirring paddle (15) passes through the sealed cover (13) and extends into the interior of the kettle reactor (4), and the upper end of the mechanical stirring paddle (15) is transmission-connected to the output end of the mechanical stirrer (9).

5. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 4, characterized in that: The inner layer of the kettle reactor (4) is a microwave shielding layer (17), one end of the microwave radiation generator (10) penetrates the sealed cover (13) and extends into the interior of the kettle reactor (4), and a rod-shaped radiation head (16) is provided at the end thereof, and the other end of the microwave radiation generator (10) is connected to an external microwave radiation generating source (11).

6. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 1, characterized in that: The separation unit comprises a membrane separation assembly (21), wherein a separation membrane is provided inside the membrane separation assembly (21), the top of the separation assembly (21) is connected to the kettle reactor (4) and the permeate collection tank (23) respectively through a three-way valve (20), and the bottom of the separation assembly (21) is connected to the solid waste collector (22) through a pipeline and a valve.

7. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 6, characterized in that: The tank reactor (4) is connected to the membrane separation component (21) via a valve, a pipeline, a material delivery pump and a pressure gauge (19).

8. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 2, characterized in that: A flushing pipe (26) with a valve leading to the solid feeder (1) is provided on the upper portion of the liquid feed tank (2), facilitating flushing of the solid feeder.

9. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 2, characterized in that: The surface of the liquid feed tank (2) is provided with a visible transparent strip. The material of the liquid feed tank (2) is selected from one of stainless steel, glass fiber reinforced plastic or polytetrafluoroethylene, and the volume is 3-5L.

10. The device for leaching precious metals using ionic liquids based on multiple leaching as claimed in claim 1, characterized in that: The material of the kettle reactor (4) is selected from stainless steel or Hastelloy, and the capacity is 1.5-2L.

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