Laterite nickel ore leachate extraction tower

Abstract

The invention discloses a laterite nickel ore leachate extraction tower which comprises an extraction tower body, a heavy phase feeding mechanism, a light phase feeding mechanism, a baffle mechanism and a gas distribution device, the extraction tower body comprises a tower body, a containing cavity is formed in the tower body, and an upper clarifying groove is formed in the top of the tower body; the baffle mechanism comprises at least one movable baffle arranged in the tower body and a lifting driving piece, and through holes are densely distributed in the movable baffles. A heavy phase and a light phase are promoted to be mixed in an air floatation mode, and meanwhile, the lifting driving part drives the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the tower body and located in a preset height range above an interface of the light phase and the heavy phase. When a heavy phase upwards penetrates through each through hole in the movable baffle, the heavy phase is dispersed into small liquid beads, so that the heavy phase is in full contact with a light phase above, the mixing effect is improved, and the extraction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of laterite nickel ore leachate extraction, and in particular to a laterite nickel ore leachate extraction tower. Background Art

[0002] Acid leaching technology is a mature process in the field of laterite nickel ore hydrometallurgy. Although it can effectively dissolve target metals such as nickel and cobalt, it also introduces various impurity ions such as manganese, copper, zinc, calcium, iron, and aluminum into the leaching solution during the process, which poses a challenge to the subsequent precise separation of nickel, cobalt and impurity ions through traditional step-by-step precipitation methods. In response to this problem, extraction method is an effective strategy for separating similar metals, and the key lies in how to improve the mass transfer efficiency in the extraction tower.

[0003] In order to optimize the extraction process, the introduction of external field energy has become one of the important means to enhance mass transfer. Among many methods, stirring technology is widely used in extraction towers because it can significantly improve the mass transfer efficiency between oil and water phases. However, uneven stirring of materials in the extraction tower may induce flooding and reduce the extraction efficiency of laterite nickel ore leachate. Summary of the invention

[0004] The purpose of this application is to overcome the above technical deficiencies and propose a laterite nickel ore leachate extraction tower to solve the technical problem in the prior art that uneven stirring of materials in the extraction tower may induce flooding and reduce the extraction efficiency of the laterite nickel ore leachate.

[0005] In order to achieve the above technical objectives, this application adopts the following technical solutions:

[0006] The present application provides a laterite nickel ore leachate extraction tower, comprising:

[0007] The extraction tower body comprises a tower body, a containing cavity is arranged inside the tower body, an upper clarification tank is arranged on the top of the tower body, and a lower clarification tank is arranged on the bottom of the tower body;

[0008] A heavy phase feeding mechanism, used for feeding heavy phase material into the upper end of the accommodating chamber;

[0009] A light phase feeding mechanism, which is used to input light phase material into the lower clarification tank;

[0010] A baffle mechanism, comprising at least one movable baffle and a lifting drive member disposed in the tower body, wherein the movable baffle is densely covered with through holes, and the lifting drive member is connected to the movable baffle and is used to drive the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the tower body and within a preset height range above the interface between the light phase and the heavy phase; and

[0011] A gas distribution device is used to blow gas into the tower body.

[0012] In some embodiments, a heavy phase feed distributor is disposed on the top of the accommodating chamber, and the heavy phase feed mechanism is used to input heavy phase material into the heavy phase feed distributor.

[0013] In some embodiments, a gas exhaust valve is disposed at the top of the upper clarification tank, and a discharge valve is disposed at the bottom of the lower clarification tank.

[0014] In some embodiments, the heavy phase feeding mechanism includes a first heavy phase storage tank and a heavy phase feed pump, the first heavy phase storage tank is used to store heavy phase material, the inlet of the heavy phase feed pump is connected to the first heavy phase storage tank, and the outlet of the heavy phase feed pump is connected to the inlet of the heavy phase feed distributor.

[0015] In some embodiments, the light phase feeding mechanism includes a first light phase storage tank and a light phase feed pump, the first light phase storage tank is used to store light phase materials, the inlet of the light phase feed pump is connected to the first light phase storage tank, and the outlet of the light phase feed pump is connected to the lower clarification tank.

[0016] In some embodiments, the lifting drive member includes two screw rods which are parallel to each other and rotatably arranged in the tower body, and a plurality of nuts are sleeved on the screw rods. The two opposite nuts on the two screw rods are respectively fixed on both sides of the movable baffle. The lifting drive member also includes a rotating drive member, which is connected to the two screw rods and is used to drive the two screw rods to rotate synchronously.

[0017] In some embodiments, the rotating drive component includes a rotating drive motor, two transmission sprockets and a chain. The rotating drive motor is connected to one of the screw rods and is used to drive the screw rod to rotate. The two transmission sprockets are respectively fixedly mounted on the two screw rods, and the two ends of the chain are respectively wrapped around the two chains. When the rotating drive motor drives a screw rod to rotate, a transmission sprocket rotates, and the chain drives another transmission sprocket to rotate, thereby driving the other screw rod to rotate, so that the two screw rods rotate synchronously.

[0018] In some embodiments, the air distribution device includes an air pump and an air outlet pipe, one end of the air outlet pipe is connected to the outlet of the air pump, and the other end of the air outlet pipe is connected to the lower end of the tower body.

[0019] In some embodiments, the air distribution device further includes a return pipe, one end of which is connected to the outlet of the exhaust valve, and the other end of which is connected to the inlet of the air pump.

[0020] In some embodiments, the air distribution device further includes an air pressure stabilizer, and the air pressure stabilizer is disposed on the return pipe.

[0021] Compared with the prior art, the laterite nickel ore leachate extraction tower provided by the present application has the following beneficial effects: the mixing of the heavy phase and the light phase is promoted by air flotation, and at the same time, the lifting drive member drives the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the tower body and within a preset height range above the interface between the light phase and the heavy phase. When the heavy phase passes through the through holes on the movable baffle upward, the heavy phase will be dispersed into small liquid droplets, so that the heavy phase is fully in contact with the light phase above, the mixing effect is improved, and thus the extraction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a laterite nickel ore leachate extraction tower provided in one embodiment of the present application;

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the extraction tower body;

[0024] Figure 3 yes Figure 2 A schematic diagram of the structure of the extraction tower body after each movable baffle moves downward;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the middle area A;

[0026] Explanation of the accompanying drawings: 1-extraction tower body, 11-tower body, 111-accommodating chamber, 112-heavy phase feed distributor, 12-upper clarification tank, 121-exhaust valve, 13-lower clarification tank, 131-discharge valve, 2-heavy phase feeding mechanism, 21-first heavy phase storage tank, 22-heavy phase feed pump, 3-light phase feeding mechanism, 31-first light phase storage tank, 32-light phase feed pump, 4-baffle mechanism, 42-movable baffle, 43-lifting drive member, 431-screw rod, 432-nut, 433-rotating drive member, 4331-rotating drive motor, 4332-transmission sprocket, 4333-chain, 5-gas distribution device, 51-air pump, 52-air outlet pipe, 53-reflux pipe, 54-air pressure stabilizer, a-light phase-heavy phase interface. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] In order to solve the technical problem that uneven stirring of materials in an extraction tower may induce flooding and reduce the extraction efficiency of laterite nickel ore leachate, the present application provides a laterite nickel ore leachate extraction tower that can improve the extraction efficiency of laterite nickel ore leachate.

[0029] See also Figure 1 , Figure 1 Schematic diagram of the structure of a laterite nickel ore leachate extraction tower in one embodiment of the present application. The laterite nickel ore leachate extraction tower includes an extraction tower body 1, a heavy phase feeding mechanism 2, a light phase feeding mechanism 3, a baffle mechanism 4 and a gas distribution device 5.

[0030] See also Figure 1-Figure 3 The extraction tower body 1 includes a tower body 11, the interior of the tower body 11 is provided with a accommodating chamber 111 for accommodating heavy phase materials and light phase materials, the top of the accommodating chamber 111 is provided with a heavy phase feed distributor 112, the top of the tower body 11 is provided with an upper clarification tank 12, the top of the upper clarification tank 12 is provided with an exhaust valve 121, the bottom of the tower body 11 is provided with a lower clarification tank 13, and the bottom of the lower clarification tank 13 is provided with a discharge valve 131.

[0031] See also Figure 1-Figure 3 The heavy phase feeding mechanism 2 is connected to the heavy phase feed distributor 112 and is used to input heavy phase material into the heavy phase feed distributor 112; specifically, the heavy phase feeding mechanism 2 includes a first heavy phase storage tank 21 and a heavy phase feed pump 22, the first heavy phase storage tank 21 is used to store heavy phase material, the inlet of the heavy phase feed pump 22 is connected to the first heavy phase storage tank 21, and the outlet of the heavy phase feed pump 22 is connected to the inlet of the heavy phase feed distributor 112.

[0032] See also Figure 1-Figure 3 The light phase feeding mechanism 3 is connected to the lower clarification tank 13 and is used to input light phase material into the lower clarification tank 13. Specifically, the light phase feeding mechanism 3 includes a first light phase storage tank 31 and a light phase feeding pump 32. The first light phase storage tank 31 is used to store light phase material. The inlet of the light phase feeding pump 32 is connected to the first light phase storage tank 31, and the outlet of the light phase feeding pump 32 is connected to the lower clarification tank 13.

[0033] See also Figure 1-Figure 3The baffle mechanism 4 includes at least one movable baffle 62 and a lifting drive 43 disposed in the tower body 11, and the movable baffle 62 is densely covered with through holes. The lifting drive 43 is connected to the movable baffle 62 and is used to drive the movable baffle 62 to move up and down, so that the movable baffle 62 is always located in the light phase in the tower body 11 and is located within a preset height range above the light phase-heavy phase interface a (i.e., the oil-water interface). When the light phase passes through the movable baffle 62 downward, it will be dispersed into oil droplets after passing through each through hole of the movable baffle 62, so as to facilitate subsequent mixing with the heavy phase below and improve the mixing effect. Since the height of the interface between the light phase and the heavy phase is not fixed, it is necessary to drive the movable baffle 62 to move up and down through the lifting drive 43, so that the movable baffle 62 is always located in the light phase in the tower body 11 and is located within a preset height range above the interface between the light phase (oil) and the heavy phase (water).

[0034] In this embodiment, the preset height is one third of the height of the light phase material in the tower body.

[0035] In this embodiment, please refer to Figure 3 and Figure 4 The lifting drive member 43 includes two screw rods 431 which are parallel to each other and rotatably arranged in the tower body 11. A plurality of nuts 432 are sleeved on the screw rods 431. The two opposite nuts 432 on the two screw rods 431 are respectively fixed on the two sides of the movable baffle 62. The lifting drive member 43 also includes a rotating drive member 433. The rotating drive member 433 is connected to the two screw rods 431 and is used to drive the two screw rods 431 to rotate synchronously. Since the movable baffle 62 cannot rotate, when the screw rods 431 rotate synchronously, the movable baffle 62 will move up and down.

[0036] In this embodiment, please refer to Figure 3 and Figure 4 The rotating driving member 433 includes a rotating driving motor 4331, two transmission sprockets 4332 and a chain 4333. The rotating driving motor 4331 is connected to one of the screw rods 431 and is used to drive the screw rod 431 to rotate. The two transmission sprockets 4332 are respectively fixedly mounted on the two screw rods 431, and the two ends of the chain are respectively wound around the two chains 4333. When the rotating driving motor 4331 drives one of the screw rods 431 to rotate, one transmission sprocket 4332 rotates, and the chain 4333 drives the other transmission sprocket 4332 to rotate, thereby driving the other screw rod 431 to rotate, so that the two screw rods 431 rotate synchronously.

[0037] The gas distribution device 5 is used to blow gas into the tower body 11 to promote material mixing. The gas distribution device 5 includes an air pump 51 and an air outlet pipe 52. One end of the air outlet pipe 52 is connected to the outlet of the air pump 51, and the other end of the air outlet pipe 52 is connected to the lower end of the tower body 11.

[0038] Preferably, the gas distribution device 5 further includes a return pipe 53, one end of which is connected to the outlet of the exhaust valve 121, and the other end of which is connected to the inlet of the air pump 51, so that the volatile gas can be recycled.

[0039] Preferably, the air distribution device 5 further includes an air pressure stabilizer 54, and the air pressure stabilizer 54 is arranged on the reflux pipe 53, so as to maintain the pressure in the tower body stable and prevent the occurrence of liquid flooding.

[0040] This application includes the following steps:

[0041] (1) injecting a heavy phase material into the containing chamber of the extraction tower through the top of the extraction tower, and injecting a light phase material into the containing chamber of the extraction tower through the bottom of the extraction tower, so that the heavy phase material and the light phase material are in countercurrent contact in the containing chamber;

[0042] Specifically, the heavy phase material flows out from the first heavy phase storage tank 21, flows into the heavy phase feed distributor 112 through the heavy phase feed pump 22, and flows into the containing chamber 111 after being distributed by the heavy phase feed distributor 112, and the light phase material flows out from the first light phase storage tank 31, flows into the containing chamber 111 through the light phase feed pump 32, so that the heavy phase material and the light phase material are in countercurrent contact in the containing chamber;

[0043] (2) The driving motor 4331 is rotated to drive the two screw rods 431 to rotate synchronously, and the movable baffle 62 moves up and down, so that the movable baffle 62 is always located in the light phase in the tower body 11 and within a preset height range above the interface between the light phase (oil) and the heavy phase (water);

[0044] (3) At the same time, the air pump 51 is turned on to allow the gas to flow into the extraction tower through the gas outlet pipe 52, thereby promoting material mixing;

[0045] (4) After a period of extraction, the gas injection is stopped. After the heavy phase material and the light phase material are separated, the discharge valve 131 is opened to discharge the heavy phase material and the light phase material into the liquid separation tank. The heavy phase material and the light phase material are subsequently separated by the liquid separation tank.

[0046] The technical solution provided by the present application promotes the mixing of the heavy phase and the light phase by air flotation. At the same time, the lifting drive member drives the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the tower body and within a preset height range above the interface between the light phase and the heavy phase. When the heavy phase passes through the through holes on the movable baffle upward, the heavy phase will be dispersed into small liquid droplets, so that the heavy phase is fully in contact with the light phase above, improving the mixing effect, thereby improving the extraction efficiency.

[0047] The specific implementation methods of the present application described above do not constitute a limitation on the protection scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A laterite nickel ore leachate extraction tower, characterized in that: include: The extraction tower body comprises a tower body, a containing cavity is arranged inside the tower body, an upper clarification tank is arranged on the top of the tower body, and a lower clarification tank is arranged on the bottom of the tower body; A heavy phase feeding mechanism, used for feeding heavy phase material into the upper end of the accommodating chamber; A light phase feeding mechanism, which is used to input light phase material into the lower clarification tank; A baffle mechanism, comprising at least one movable baffle and a lifting drive member disposed in the tower body, wherein the movable baffle is densely covered with through holes, and the lifting drive member is connected to the movable baffle and is used to drive the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the tower body and within a preset height range above the interface between the light phase and the heavy phase; and A gas distribution device is used to blow gas into the tower body.

2. The laterite nickel ore leachate extraction tower according to claim 1, characterized in that: A heavy phase feed distributor is arranged on the top of the accommodating chamber, and the heavy phase feed mechanism is used for inputting heavy phase material into the heavy phase feed distributor.

3. The laterite nickel ore leachate extraction tower according to claim 1, characterized in that: The top of the upper clarification tank is provided with an exhaust valve, and the bottom of the lower clarification tank is provided with a discharge valve.

4. The laterite nickel ore leachate extraction tower according to claim 2, characterized in that: The heavy phase feeding mechanism includes a first heavy phase storage tank and a heavy phase feeding pump. The first heavy phase storage tank is used to store heavy phase materials. The inlet of the heavy phase feeding pump is connected to the first heavy phase storage tank, and the outlet of the heavy phase feeding pump is connected to the inlet of the heavy phase feeding distributor.

5. The laterite nickel ore leachate extraction tower according to claim 1, characterized in that: The light phase feeding mechanism comprises a first light phase storage tank and a light phase feeding pump. The first light phase storage tank is used to store light phase materials. The inlet of the light phase feeding pump is connected to the first light phase storage tank, and the outlet of the light phase feeding pump is connected to the lower clarification tank.

6. The laterite nickel ore leachate extraction tower according to claim 1, characterized in that: The lifting drive member includes two screw rods which are parallel to each other and rotatably arranged in the tower body, a plurality of nuts are sleeved on the screw rods, and two opposite nuts on the two screw rods are respectively fixed on both sides of the movable baffle. The lifting drive member also includes a rotating drive member, which is connected to the two screw rods and is used to drive the two screw rods to rotate synchronously.

7. The laterite nickel ore leachate extraction tower according to claim 6, characterized in that: The rotating driving component includes a rotating driving motor, two transmission sprockets and a chain. The rotating driving motor is connected to one of the screw rods and is used to drive the screw rod to rotate. The two transmission sprockets are respectively fixedly mounted on the two screw rods, and the two ends of the chain are respectively wound around the two chains. When the rotating driving motor drives one screw rod to rotate, one transmission sprocket rotates, and the chain drives the other transmission sprocket to rotate, thereby driving the other screw rod to rotate, so that the two screw rods rotate synchronously.

8. The laterite nickel ore leachate extraction tower according to claim 1, characterized in that: The air distribution device comprises an air pump and an air outlet pipe, one end of the air outlet pipe is connected to the outlet of the air pump, and the other end of the air outlet pipe is connected to the lower end of the tower body.

9. The laterite nickel ore leachate extraction tower according to claim 8, characterized in that: The air distribution device further comprises a return pipe, one end of which is communicated with the outlet of the exhaust valve, and the other end of which is communicated with the inlet of the air pump.

10. The laterite nickel ore leachate extraction tower according to claim 9, characterized in that: The air distribution device further comprises an air pressure stabilizer, and the air pressure stabilizer is arranged on the return pipe.

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