CN214598982U - Gas-liquid reaction system and hydrometallurgical equipment with same - Google Patents

Abstract

The utility model discloses a gas-liquid reaction system and a wet-process metallurgical device with the same, wherein the gas-liquid reaction system comprises a reaction unit, the reaction unit comprises a reaction device, a feeding device and a gas dissolving device, the reaction device comprises a reaction tank, a stirring component and a communicating pipe, the reaction tank is filled with a mixed material of a gas material and a liquid material, the stirring assembly is arranged in the reaction tank, for stirring the mixed materials in the reaction tank, one end of the communicating pipe is communicated with the reaction tank, the communicating pipe is used for leading out the mixed materials in the reaction tank, the feeding device is positioned outside the reaction tank and used for supplying the mixed materials into the reaction tank, the gas dissolving device is connected with the feeding device and the reaction tank, and is positioned outside the reaction tank to pressurize the mixed material. The utility model discloses a gas-liquid reaction system can improve the reaction rate of gas and liquid, and low in production cost.

Description

Gas-liquid reaction system and hydrometallurgical equipment with same

Technical Field

The utility model relates to a hydrometallurgy's technical field specifically, relates to a gas-liquid reaction system and hydrometallurgy equipment that has this gas-liquid reaction system.

Background

Hydrometallurgy is a process of chemically treating metal mineral raw materials in an aqueous solution of an acidic medium or an alkaline medium or extracting metals and compounds thereof by an organic solvent or by extracting impurities, and is a very common mineral decomposition, extraction and impurity removal process.

In hydrometallurgical processes, the reaction rate of gases and liquids is slow due to the poor solubility and dissolution rate of gases in liquids. In the related art, the reaction of gas and liquid may be performed at high temperature and high pressure to accelerate the reaction rate of gas and liquid. However, the entire system is in a high-temperature and high-pressure state for a long time, which causes a problem of high use cost of the gas-liquid reaction system.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

To this end, an embodiment of an aspect of the present invention provides a gas-liquid reaction system, which can improve the reaction rate of gas and liquid and has a low production cost.

An embodiment of another aspect of the present invention provides a hydrometallurgical plant.

The gas-liquid reaction system according to an embodiment of the first aspect of the present invention includes a reaction unit, the reaction unit including: the reaction device comprises a reaction tank, a stirring assembly and a communicating pipe, wherein a mixed material of a gas material and a liquid material is filled in the reaction tank, the stirring assembly is arranged in the reaction tank and is used for stirring the mixed material in the reaction tank, one end of the communicating pipe is communicated with the reaction tank, and the communicating pipe is used for guiding the mixed material in the reaction tank; a feeding device located outside the reaction tank for supplying the mixed material into the reaction tank; and the gas dissolving device is connected with the feeding device and the reaction tank, and is positioned outside the reaction tank so as to pressurize the mixed material.

According to the utility model discloses gas-liquid reaction system supplies with the mixing material to dissolving the gas device through feedway, then pressurizes the mixing material through dissolving the gas device to improve the solubility of gas material in liquid material, then let in the mixing material after dissolving the pressurization to the reaction tank in, with further mixing stirring to the mixing material, and the mixing material can circulate between dissolving gas device and reaction tank, thereby the utility model discloses gas-liquid reaction system can improve the solubility of gas material in liquid material for the reaction rate of gas material and liquid material, and manufacturing cost is lower.

In some embodiments, the feeding device includes an ejector, the ejector includes a body, a cavity is provided in the body, a liquid inlet, a liquid outlet and an ejector orifice are provided on the body, the liquid inlet is located at a first end of the body, the liquid outlet is located at a second end of the body, the ejector orifice is located at a peripheral wall of the body, the liquid inlet, the liquid outlet and the ejector orifice are communicated with the cavity, the liquid inlet is communicated with the reaction tank for introducing the liquid material in the reaction tank into the cavity, the ejector orifice is used for sucking the gas material into the cavity, and the liquid outlet is communicated with the gas dissolving device for introducing the mixed material of the gas material and the liquid material in the cavity into the gas dissolving device.

In some embodiments, the feeding device further includes a pump body, a first pipe and a second pipe, a first end of the first pipe is communicated with the liquid outlet, a second end of the first pipe is communicated with an inlet of the pump body, the first pipe is used for introducing the mixture in the cavity into the pump body, the second pipe is communicated with the inlet of the pump body, the second pipe is used for introducing the gas material into the pump body, and an outlet of the pump body is communicated with the gas dissolving device so as to introduce the mixture in the pump body into the gas dissolving device.

In some embodiments, the stirring subassembly includes driving piece, puddler and stirring rake, the first end of puddler with the driving piece links to each other, the second end of puddler with the stirring rake links to each other, the stirring rake is located in the reaction tank, the stirring rake is a plurality of, and is a plurality of the stirring rake is in the axial interval arrangement of puddler.

In some embodiments, the paddle is at least one of a vertical turbine paddle, a down-pressure turbine paddle, and a lift-up turbine paddle.

In some embodiments, the reaction unit further includes a third pipe, so as to introduce the pressurized mixture in the gas dissolving device into the reaction tank, a first end of the third pipe is communicated with the gas dissolving device, a second end of the third pipe extends into the reaction tank, and an end of the second end of the third pipe is located between two adjacent stirring paddles.

In some embodiments, the second end of the third pipe has a feeding portion, a free end of the feeding portion is bent toward a middle portion of the stirring paddle, and a peripheral wall of the feeding portion is opened with a plurality of holes.

In some embodiments, the reaction tank has an aspect ratio of 1 to 8: 1.

In some embodiments, the reaction unit is a plurality of reaction units, and the reaction tanks of the plurality of reaction units are sequentially communicated.

A hydrometallurgical plant according to an embodiment of the second aspect of the present invention comprises a gas-liquid reaction system as described in any of the above embodiments.

According to the utility model discloses a reaction rate of gaseous material and liquid material among the hydrometallurgy equipment is high, and low in production cost.

Drawings

Fig. 1 is a schematic view of a gas-liquid reaction system according to an embodiment of the present invention.

Fig. 2A is a schematic view of a stirring blade of a gas-liquid reaction system according to an embodiment of the present invention.

Fig. 2B is a schematic view of a stirring blade of a gas-liquid reaction system according to another embodiment of the present invention.

Fig. 2C is a schematic view of a stirring blade of a gas-liquid reaction system according to still another embodiment of the present invention.

Reference numerals:

100. a reaction unit;

1. a reaction device; 11. a reaction tank; 111. a feed inlet; 12. a stirring assembly; 121. a drive member; 122. a stirring rod; 123. a stirring paddle;

2. a gas dissolving device;

3. a feeding device; 31. an ejector; 311. a body; 312. a liquid inlet; 313. a liquid outlet; 314. a jet orifice; 32. a pump body; 33. a first tube; 34. a second tube;

4. a third tube; 41. a feeding section;

5. a communication pipe is provided.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

A gas-liquid reaction system and a hydrometallurgical plant according to embodiments of the present invention will now be described with reference to fig. 1 and 2.

As shown in fig. 1, a gas-liquid reaction system according to an embodiment of the present invention includes a reaction unit 100, and the reaction unit 100 includes a reaction device 1, a supply device 3, and a gas dissolving device 2. The reaction device 1 comprises a reaction tank 11, a stirring assembly 12 and a communicating pipe 5, wherein the reaction tank 11 is filled with a mixed material of a gas material and a liquid material. The stirring assembly 12 is arranged in the reaction tank 11 to be used for stirring the mixed materials in the reaction tank 11, one end of the communicating pipe 5 is communicated with the reaction tank 11, and the communicating pipe 5 is used for leading out the mixed materials in the reaction tank 11. The supply device 3 is located outside the reaction tank 11 for supplying the mixed material into the reaction tank 11. The gas dissolving device 2 is connected with the feeding device 3 and the reaction tank 11, and the gas dissolving device 2 is positioned outside the reaction tank 11 and used for pressurizing the mixed materials.

According to the utility model discloses gas-liquid reaction system supplies with the mixing material to dissolving gas device 2 through feedway 3, then pressurizes the mixing material through dissolving gas device 2 to improve the solubility of gas material in liquid material, then lets in the mixing material after dissolving with the pressurization to reaction tank 11 in again, with further mixing stirring to the mixing material, and the mixing material can circulate between dissolving gas device 2 and reaction tank 11, thereby the utility model discloses gas-liquid reaction system can improve the solubility of gas material in liquid material for the reaction rate of gas material and liquid material. In addition, because the feeding device 3 and the gas dissolving device 2 are both positioned at the outer side of the reaction device 1, it can be understood that the feeding device 3 is separated from the gas dissolving device 2 to pressurize and stir the gas material and the liquid material respectively, so that the temperature and the pressure of the gas-liquid reaction system can be reduced, and the production cost of the gas-liquid reaction system can be further reduced.

In some embodiments, as shown in fig. 1, the feeding device 3 comprises an ejector 31, for example, the ejector 31 is a venturi ejector. The jet device 31 includes a body 311, a cavity is provided in the body 311, a liquid inlet 312, a liquid outlet 313 and a jet port 314 are provided on the body 311, the liquid inlet 312 is located at a first end of the body 311 (e.g., an upper end of the body 311 in fig. 1), the liquid outlet 313 is located at a second end of the body 311 (e.g., a lower end of the body 311 in fig. 1), the jet port 314 is located at a peripheral wall of the body 311, and the liquid inlet 312, the liquid outlet 313 and the jet port 314 are all communicated with the cavity. The liquid inlet 312 is communicated with the reaction tank 11 for introducing the liquid material in the reaction tank 11 into the cavity, the jet port 314 is used for sucking the gas material into the cavity, and the liquid outlet 313 is communicated with the gas dissolving device 2 for introducing the mixed material of the gas material and the liquid material in the cavity into the gas dissolving device 2.

It can be understood that, the liquid material in the reaction tank 11 enters into the cavity by inlet 312, and the gas material enters into the cavity by efflux port 314, then gas material and liquid material carry out preliminary mixture in the cavity, then enter into to dissolve gas device 2 by outlet 313 again to the mixed material to gas material and liquid material carries out pressurization and handles, thereby the utility model discloses a gas-liquid reaction system can improve the solubility of gas material in the liquid material for the reaction rate of gas material and liquid material.

Further, as shown in fig. 1, the supply device 3 further includes a pump body 32, a first pipe 33, and a second pipe 34. A first end (for example, the upper end of the first tube 33 in fig. 1) of the first tube 33 is communicated with the liquid outlet 313, a second end (for example, the right end of the first tube 33 in fig. 1) of the first tube 33 is communicated with the inlet of the pump body 32, the first tube 33 is used for introducing the mixture in the cavity into the pump body 32, the second tube 34 is communicated with the inlet of the pump body 32, the second tube 34 is used for introducing the gas material into the pump body 32, and the outlet of the pump body 32 is communicated with the gas dissolving device 2 so as to introduce the mixture in the pump body 32 into the gas dissolving device 2.

It will be appreciated that when it is desired to replenish gaseous material in the gasometer 2, as shown in figure 1, gaseous material may be injected directly into the pump body 32 through the second tube 34 and then introduced into the gasometer 2. Of course, the liquid material can be introduced into the gas dissolving device 2 through the second pipe 34 according to the actual production requirement.

In some embodiments, as shown in fig. 1, the stirring assembly 12 includes a driving member 121, a stirring rod 122 and a plurality of stirring paddles 123, wherein a first end of the stirring rod 122 (e.g., an upper end of the stirring rod 122 in fig. 1) is connected to the driving member 121, a second end of the stirring rod 122 (e.g., a lower end of the stirring rod 122 in fig. 1) is connected to the stirring paddles 123, the stirring paddles 123 are coaxially disposed in the reaction tank 11, the number of the stirring paddles 123 is plural, and the plurality of the stirring paddles 123 are spaced apart from each other in the axial direction of the stirring rod 122. For example, there are two stirring paddles 123, and the two stirring paddles 123 are arranged at intervals in the vertical direction of the reaction tank 11.

Alternatively, the rotation speed of the paddles 123 is adjustable, and the rotation speed of the paddles 123 is between 10-300 rpm.

Alternatively, as shown in fig. 2A, the paddle 123 is a vertical turbine paddle, as shown in fig. 2B, the paddle 123 is a downward-pressing turbine paddle, and as shown in fig. 2C, the paddle 123 is an upward-lifting turbine paddle. It can be understood that, when the stirring rake 123 rotates, can make the mixing material in the reaction tank 11 along the rotation in circumference and the axial flow of reaction tank 11, thereby the utility model discloses gas-liquid reaction system can improve the solubility of gas material in the liquid material for the reaction rate of gas material and liquid material.

In some embodiments, as shown in fig. 1, the reaction unit 100 further includes a third pipe 4 for introducing the pressurized mixture in the gas dissolving device 2 into the reaction tank 11, a first end of the third pipe 4 (e.g., a lower end of the third pipe 4 in fig. 1) is communicated with the gas dissolving device 2, and a second end of the third pipe 4 (e.g., an upper end of the third pipe 4 in fig. 1) extends into the reaction tank 11.

Preferably, as shown in fig. 1, the second end of the third pipe 4 has a feeding portion 41, a free end of the feeding portion 41 (e.g., a lower end of the feeding portion 41 in fig. 1) is bent toward a middle portion of the paddle 123, and a peripheral wall of the feeding portion 41 is opened with a plurality of holes. It can be understood that, as shown in fig. 1, the mixture in the gas dissolving device 2 enters the reaction tank 11 through the third pipe 4, and is dispersed to the position of the stirring paddle 123 through a plurality of holes on the feeding portion 41, so as to improve the mixing efficiency of the gas material and the liquid material of the gas-liquid reaction system of the embodiment of the present invention.

Alternatively, the ratio of the height to the diameter of the reaction tank 11 is 1-8: 1.

In some embodiments, as shown in fig. 1, the reaction unit 100 is plural, and the plurality of reaction tanks 11 of the plurality of reaction units 100 are sequentially communicated through the communicating tube 5. It is understood that a mixture of a gaseous material and a liquid material may be recycled through the plurality of reaction units 100 to increase the solubility of the gaseous material in the liquid material and to accelerate the reaction rate of the gaseous material and the liquid material.

The hydrometallurgical plant according to an embodiment of another aspect of the present invention comprises the gas-liquid reaction system of an embodiment of the present invention.

According to the utility model discloses a reaction rate of gaseous material and liquid material among the hydrometallurgy equipment is high, and low in production cost.

Hydrometallurgical plants according to some specific examples of the invention are described below with reference to the drawings.

As shown in fig. 1 and 2, a hydrometallurgical plant according to embodiments of the present invention includes a gas-liquid reaction system including a plurality of reaction units 100.

As shown in fig. 1, the reaction unit 100 includes a reaction device 1, a supply device 3, and a gas dissolving device 2. The reaction apparatus 1 comprises a reaction tank 11, a stirring assembly 12, a communicating pipe 5 and a third pipe 4, wherein the stirring assembly 12 comprises a driving member 121, a stirring rod 122 and a stirring paddle 123. The supply device 3 includes an ejector 31, a pump body 32, a first pipe 33, and a second pipe 34.

As shown in fig. 1, the reaction tank 11 is filled with a mixed material of a gas material and a liquid material. The cross section of the reaction tank 11 is circular, and the height-diameter ratio of the reaction tank 11 is 1-8: 1. The reaction tanks 11 of the plurality of reaction units 100 are connected in series by the communicating tube 5. The mixed material of the gas material and the liquid material can be circularly processed through the plurality of reaction units 100 to improve the solubility of the gas material in the liquid material and accelerate the reaction rate of the gas material and the liquid material.

As shown in FIG. 1, a feed port 111 is provided at the upper end of the reaction tank 11, and a liquid material can be fed into the reaction tank 11 through the feed port 111. The upper end of the stirring rod 122 is connected with the driving member 121, and the lower end of the stirring rod 122 is connected with the stirring paddle 123. The driving member 121 is a variable frequency motor, the rotating speed of the driving member 121 is between 10 rpm and 300rpm, and the driving member 121 is disposed at the upper end of the reaction tank 11.

As shown in fig. 1 and fig. 2, the stirring paddles 123 are located in the reaction tank 11, there are two stirring paddles 123, both stirring paddles 123 are coaxial with the stirring rod 122, and the two stirring paddles 123 are spaced up and down. The driving member 121 drives the stirring paddle 123 to rotate, so that the stirring paddle 123 drives the materials in the reaction tank 11 to rotate and mix. For example, the paddle 123 is a vertical turbine paddle, a down-pressure turbine paddle, or a lift-up turbine paddle.

As shown in fig. 1, the supply means 3 and the gas dissolving means 2 are located outside the reaction tank 11. The feeding device 3 is connected with the gas dissolving device 2 and the reaction tank 11. The jet device 31 comprises a body 311, a cavity is arranged in the body 311, a liquid inlet 312, a liquid outlet 313 and a jet port 314 are arranged on the body 311, the liquid inlet 312 is positioned at the upper end of the body 311, the liquid outlet 313 is positioned at the lower end of the body 311, the jet port 314 is positioned on the peripheral wall of the body 311, and the liquid inlet 312, the liquid outlet 313 and the jet port 314 are all communicated with the cavity. The liquid inlet 312 is communicated with the reaction tank 11 for introducing the liquid material in the reaction tank 11 into the cavity, the jet port 314 is used for sucking the gas material into the cavity, and the liquid outlet 313 is communicated with the gas dissolving device 2 for introducing the mixed material of the gas material and the liquid material in the cavity into the gas dissolving device 2.

As shown in fig. 1, the liquid material in the reaction tank 11 enters the cavity through the liquid inlet 312, the gas material enters the cavity through the jet port 314, and then the gas material and the liquid material are primarily mixed in the cavity and then enter the gas dissolving device 2 through the liquid outlet 313, so as to pressurize the mixed material of the gas material and the liquid material.

As shown in fig. 1, the upper end of the first pipe 33 is communicated with the liquid outlet 313, the right end of the first pipe 33 is communicated with the inlet of the pump body 32, the first pipe 33 is used for introducing the mixture in the cavity into the pump body 32, the second pipe 34 is communicated with the inlet of the pump body 32, the second pipe 34 is used for introducing the gas material into the pump body 32, and the outlet of the pump body 32 is communicated with the gas dissolving device 2 so as to introduce the mixture in the pump body 32 into the gas dissolving device 2.

As shown in fig. 1, when gas material needs to be supplemented in the gas dissolving device 2, the gas material can be directly injected into the pump body 32 through the second pipe 34, and then the gas material is introduced into the gas dissolving device 2. Of course, the liquid material can be introduced into the gas dissolving device 2 through the second pipe 34 according to the actual production requirement.

As shown in fig. 1, the lower end of the third pipe 4 is communicated with the gas dissolving device 2, and the upper end of the third pipe 4 extends into the reaction tank 11. One end of the third pipe 4 extending into the reaction tank 11 is provided with a feeding portion 41, the lower end of the feeding portion 41 is bent toward the middle of the stirring paddle 123, and the peripheral wall of the feeding portion 41 is provided with a plurality of holes.

As shown in fig. 1, the mixture in the gas dissolving device 2 enters into the reaction tank 11 through the third pipe 4, and disperses the mixture to the position of the stirring paddle 123 through a plurality of holes on the feeding portion 41, and then stirs the mixture through the stirring paddle 123, thereby improving the mixing efficiency of the gas material and the liquid material of the gas-liquid reaction system of the embodiment of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A gas-liquid reaction system comprising a reaction unit, the reaction unit comprising:

the reaction device comprises a reaction tank, a stirring assembly and a communicating pipe, wherein a mixed material of a gas material and a liquid material is filled in the reaction tank, the stirring assembly is arranged in the reaction tank and is used for stirring the mixed material in the reaction tank, one end of the communicating pipe is communicated with the reaction tank, and the communicating pipe is used for guiding the mixed material in the reaction tank;

a feeding device located outside the reaction tank for supplying the mixed material into the reaction tank;

and the gas dissolving device is connected with the feeding device and the reaction tank, and is positioned outside the reaction tank so as to pressurize the mixed material.

2. The gas-liquid reaction system of claim 1, wherein the feeding device comprises an ejector, the ejector comprises a body, the body has a cavity therein, the body is provided with a liquid inlet, a liquid outlet and an ejector, the liquid inlet is located at a first end of the body, the liquid outlet is located at a second end of the body, the ejector is located at a peripheral wall of the body, the liquid inlet, the liquid outlet and the ejector are all communicated with the cavity,

the liquid inlet is communicated with the reaction tank to be used for leading in the liquid materials in the reaction tank into the cavity, the jet orifice is used for sucking gas materials into the cavity, and the liquid outlet is communicated with the gas dissolving device to be used for leading in the mixed materials of the gas materials and the liquid materials in the cavity into the gas dissolving device.

3. The gas-liquid reaction system according to claim 2, wherein the supply device further includes a pump body, a first pipe and a second pipe, a first end of the first pipe is communicated with the liquid outlet, a second end of the first pipe is communicated with an inlet of the pump body, the first pipe is used for introducing the mixture in the cavity into the pump body, the second pipe is communicated with the inlet of the pump body, the second pipe is used for introducing the gas material into the pump body, and an outlet of the pump body is communicated with the gas dissolving device so as to introduce the mixture in the pump body into the gas dissolving device.

4. The gas-liquid reaction system according to claim 1, wherein the stirring assembly includes a driving member, a stirring rod and a plurality of stirring paddles, a first end of the stirring rod is connected to the driving member, a second end of the stirring rod is connected to the stirring paddles, the stirring paddles are disposed in the reaction tank, and the plurality of stirring paddles are axially spaced apart from the stirring rod.

5. The gas-liquid reaction system according to claim 4, wherein the stirring paddle is at least one of a vertical turbine paddle, a down-pressure turbine paddle, and an up-lift turbine paddle.

6. The gas-liquid reaction system according to claim 4, wherein the reaction unit further includes a third pipe for introducing the pressurized mixture in the gas dissolving device into the reaction tank, a first end of the third pipe is communicated with the gas dissolving device, a second end of the third pipe extends into the reaction tank, and an end of the second end of the third pipe is located between two adjacent stirring paddles.

7. The gas-liquid reaction system according to claim 6, wherein the second end of the third pipe has a feeding portion, a free end of the feeding portion is bent toward a middle portion of the paddle, and a peripheral wall of the feeding portion is opened with a plurality of holes.

8. The gas-liquid reaction system according to claim 1, wherein the height-to-diameter ratio of the reaction tank is 1 to 8: 1.

9. The gas-liquid reaction system according to any one of claims 1 to 8, wherein the reaction unit is provided in plurality, and the reaction tanks of the plurality of reaction units are connected in series.

10. A hydrometallurgical plant, comprising a gas-liquid reaction system according to any one of claims 1-9.

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