Laterite nickel ore leachate extraction tower

Abstract

The present application discloses a laterite nickel ore leachate extraction tower, comprising an extraction tower body, a heavy-phase feed mechanism, a light-phase feed mechanism, a baffle mechanism, and an air distribution apparatus. The extraction tower body comprises a tower, the interior of which is provided with a receiving cavity, and a top portion of the tower is provided with an upper clarifying tank. The baffle mechanism comprises at least one movable baffle arranged inside the tower and a lifting drive member, and the movable baffle is densely provided with through holes. In the present application, mixing of a heavy phase and a light phase is promoted by means of a flotation method, while the lifting drive member drives the movable baffle to move up and down so that the movable baffle is always located within the light phase in the tower and within a preset height range above an interface between the light phase and the heavy phase. When the heavy phase passes upward through the through holes on the movable baffle, the heavy phase is dispersed into small liquid droplets, allowing full contact with the light phase above, thereby improving the mixing effect and increasing extraction efficiency.

Description

A laterite nickel ore leaching solution extraction column TECHNICAL FIELD

[0001] The present application relates to the technical field of laterite nickel ore leaching solution extraction, in particular to a laterite nickel ore leaching solution extraction column. BACKGROUND

[0002] As a mature process in the field of laterite nickel ore hydrometallurgy, although the acid leaching technology 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, which poses a challenge to the subsequent precise separation of nickel, cobalt and impurity ions by traditional step-by-step precipitation method. In view of this problem, the extraction method as an effective strategy for similar metal separation lies in how to improve the mass transfer efficiency in the extraction column.

[0003] In order to optimize the extraction process, introducing external field energy has become one of the important means to strengthen mass transfer. Among many methods, stirring technology is widely used in extraction columns because it can significantly improve the mass transfer efficiency between oil and water phases. However, uneven stirring of materials in the extraction column may induce liquid flooding phenomenon, reducing the extraction efficiency of laterite nickel ore leaching solution.

[0004] SUMMARY

[0005] The purpose of the present application is to overcome the above technical deficiencies and provide a laterite nickel ore leaching solution extraction column to solve the technical problem of uneven stirring of materials in the extraction column which may induce liquid flooding phenomenon and reduce the extraction efficiency of laterite nickel ore leaching solution.

[0006] To achieve the above technical purpose, the following technical solutions are adopted in the present application:

[0007] The present application provides a laterite nickel ore leaching solution extraction column, comprising:

[0008] An extraction column body, the extraction column body comprises a column body, an accommodation cavity is arranged in the interior of the column body, an upper clarifying tank is arranged at the top of the column body, and a lower clarifying tank is arranged at the bottom of the column body;

[0009] A heavy phase feeding mechanism for inputting heavy phase materials to the upper end of the accommodation cavity;

[0010] A light phase feeding mechanism for inputting light phase materials into the lower clarifying tank;

[0011] A baffle mechanism comprising at least one movable baffle arranged in the column body and a lifting driving member, the movable baffle is densely provided with through holes, the lifting driving member is connected with 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 column body and is located within a preset height range above the interface between the light phase and the heavy phase; and,

[0012] A gas distribution device for blowing gas into the tower body.

[0013] In some embodiments, a top of the containing cavity is provided with a heavy phase feed distributor, and the heavy phase feed mechanism is used to input heavy phase material to the heavy phase feed distributor.

[0014] In some embodiments, a top end of the upper clarifying tank is provided with an exhaust valve, and a bottom of the lower clarifying tank is provided with a discharge valve.

[0015] In some embodiments, the heavy phase feed mechanism comprises 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, an inlet of the heavy phase feed pump is in communication with the first heavy phase storage tank, and an outlet of the heavy phase feed pump is in communication with an inlet of the heavy phase feed distributor.

[0016] In some embodiments, the light phase feed mechanism comprises a first light phase storage tank and a light phase feed pump, the first light phase storage tank is used to store light phase material, an inlet of the light phase feed pump is in communication with the first light phase storage tank, and an outlet of the light phase feed pump is in communication with the lower clarifying tank.

[0017] In some embodiments, the lifting drive comprises two parallel and rotationally arranged lead screws in the tower body, a plurality of nuts are sleeved on the lead screws, and the opposite nuts on the two lead screws are fixed to the two sides of the movable baffle, respectively. The lifting drive further comprises a rotation drive, which is connected with the two lead screws and is used to drive the two lead screws to rotate synchronously.

[0018] In some embodiments, the rotation drive comprises a rotation drive motor, two transmission sprockets and a chain, the rotation drive motor is connected with one of the lead screws and is used to drive the lead screw to rotate, the two transmission sprockets are fixedly sleeved on the two lead screws, respectively, and the chain is wound around the two transmission sprockets, respectively. When the rotation drive motor drives one of the lead screws to rotate, one of the transmission sprockets rotates, and the chain drives the other transmission sprocket to rotate, thereby driving the other lead screw to rotate, so that the two lead screws rotate synchronously.

[0019] In some embodiments, the gas distribution device comprises a gas pump and a gas outlet pipe, one end of the gas outlet pipe is in communication with an outlet of the gas pump, and the other end of the gas outlet pipe is in communication with a lower end of the tower body.

[0020] In some embodiments, the gas distribution device further comprises a return pipe, one end of the return pipe is in communication with an outlet of the exhaust valve, and the other end of the return pipe is in communication with an inlet of the gas pump.

[0021] In some embodiments, the air distribution device further comprises an air pressure stabilizer arranged on the return pipe.

[0022] Compared with the prior art, the red soil nickel ore leaching solution extraction tower provided by the application has the beneficial effects that: the heavy phase and the light phase are mixed through the air floating mode, and meanwhile, the lifting driving 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 located in the preset height range above the interface between the light phase and the heavy phase. When the heavy phase passes through each through hole on the movable baffle upwards, the heavy phase is dispersed into small liquid beads, so that the heavy phase is fully contacted with the light phase above, the mixing effect is improved, and the extraction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic view of a red soil nickel ore leaching solution extraction tower according to an embodiment of the application;

[0024] Fig. 2 is a structural schematic view of an extraction tower body in Fig. 1;

[0025] Fig. 3 is a structural schematic view of the extraction tower body in Fig. 2 after each movable baffle moves downward;

[0026] Fig. 4 is a partial enlarged view of region A in Fig. 3;

[0027] Brief description of reference signs: 1-extraction tower body, 11-tower body, 111-containing cavity, 112-heavy phase feed distributor, 12-upper clarifying tank, 121-exhaust valve, 13-lower clarifying tank, 131-discharge valve, 2-heavy phase feeding mechanism, 21-first heavy phase storage tank, 22-heavy phase feeding pump, 3-light phase feeding mechanism, 31-first light phase storage tank, 32-light phase feeding pump, 4-baffle mechanism, 42-movable baffle, 43-lifting driving member, 431-screw rod, 432-nut, 433-rotary driving member, 4331-rotary driving motor, 4332-transmission sprocket, 4333-chain, 5-air distribution device, 51-air pump, 52-air outlet pipe, 53-return pipe, 54-air pressure stabilizer, a-interface between light phase and heavy phase. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the application more clear and understandable, the application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0029] In order to solve the technical problem that uneven stirring of materials in the extraction tower may induce liquid overflow phenomenon and reduce the extraction efficiency of red soil nickel ore leaching solution, the application provides a red soil nickel ore leaching solution extraction tower, which can improve the extraction efficiency of red soil nickel ore leaching solution.

[0030] Referring to FIG. 1, which is a structural schematic diagram of a laterite nickel ore leaching solution extraction column in an embodiment of the present application, the laterite nickel ore leaching solution extraction column comprises an extraction column main body 1, a heavy phase feeding mechanism 2, a light phase feeding mechanism 3, a baffle mechanism 4 and a gas distribution device 5.

[0031] Referring to FIGS. 1-3, the extraction column main body 1 comprises a column body 11, the inside of the column body 11 is provided with a containing cavity 111 for containing heavy phase materials and light phase materials, the top of the containing cavity 111 is provided with a heavy phase feeding distributor 112, the top of the column body 11 is provided with an upper clarifying tank 12, the top end of the upper clarifying tank 12 is provided with an exhaust valve 121, the bottom of the column body 11 is provided with a lower clarifying tank 13, and the bottom of the lower clarifying tank 13 is provided with a discharge valve 131.

[0032] Referring to FIGS. 1-3, the heavy phase feeding mechanism 2 communicates with the heavy phase feeding distributor 112 and is used for inputting heavy phase materials into the heavy phase feeding distributor 112; specifically, the heavy phase feeding mechanism 2 comprises a first heavy phase storage tank 21 and a heavy phase feeding pump 22, the first heavy phase storage tank 21 is used for storing heavy phase materials, the inlet of the heavy phase feeding pump 22 communicates with the first heavy phase storage tank 21, and the outlet of the heavy phase feeding pump 22 communicates with the inlet of the heavy phase feeding distributor 112.

[0033] Referring to FIGS. 1-3, the light phase feeding mechanism 3 communicates with the lower clarifying tank 13 and is used for inputting light phase materials into the lower clarifying tank 13; specifically, the light phase feeding mechanism 3 comprises a first light phase storage tank 31 and a light phase feeding pump 32, the first light phase storage tank 31 is used for storing light phase materials, the inlet of the light phase feeding pump 32 communicates with the first light phase storage tank 31, and the outlet of the light phase feeding pump 32 communicates with the lower clarifying tank 13.

[0034] Referring to FIGS. 1-3, the baffle mechanism 4 comprises at least one movable baffle 62 arranged in the column body 11 and a lifting driving member 43, and the movable baffle 62 is densely provided with through holes. The lifting driving member 43 is connected with the movable baffle 62 and is used for driving the movable baffle 62 to move up and down, so that the movable baffle 62 is always located in the light phase in the column body 11 and in 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 through holes of the movable baffle 62 and is dispersed into oil droplets after passing through the movable baffle 62, the subsequent mixing with the heavy phase below is facilitated, and the mixing effect is improved, and since the height of the interface between the light phase and the heavy phase is not fixed, the lifting driving member 43 is needed 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 column body 11 and in a preset height range above the interface between the light phase (oil) and the heavy phase (water).

[0035] In this embodiment, the preset height is one third of the height of the light phase material in the tower body.

[0036] In this embodiment, please refer to FIG. 3 and FIG. 4, the lifting driving member 43 includes two screw rods 431 which are parallel to each other and are rotatably arranged in the tower body 11, a plurality of nuts 432 are sleeved on the screw rods 431, and the opposite nuts 432 on the two screw rods 431 are fixed on the two sides of the movable baffle 62, respectively. The lifting driving member 43 further includes a rotating driving member 433 which is connected with 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.

[0037] In this embodiment, please refer to FIG. 3 and FIG. 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 with one of the screw rods 431 and is used to drive the screw rod 431 to rotate. The two transmission sprockets 4332 are fixedly sleeved on the two screw rods 431, respectively. The two ends of the chain 4333 are wound around the two transmission sprockets 4333, respectively. When the rotating driving motor 4331 drives one of the screw rods 431 to rotate, one of the transmission sprockets 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.

[0038] The gas distribution device 5 is used to blow gas into the tower body 11, so as to promote the mixing of the materials. The gas distribution device 5 includes a gas pump 51 and a gas outlet pipe 52. One end of the gas outlet pipe 52 is in communication with the outlet of the gas pump 51, and the other end of the gas outlet pipe 52 is in communication with the lower end of the tower body 11.

[0039] Preferably, the gas distribution device 5 further includes a backflow pipe 53. One end of the backflow pipe 53 is in communication with the outlet of the exhaust valve 121, and the other end of the backflow pipe 53 is in communication with the inlet of the gas pump 51, so that the volatile gas can be recycled.

[0040] Preferably, the gas distribution device 5 further includes a gas pressure stabilizer 54 which is arranged on the backflow pipe 53, so as to maintain the pressure in the tower body stable and prevent the occurrence of liquid overflow.

[0041] The present application includes the following steps:

[0042] (1) The heavy phase material is injected into the containing cavity of the extraction tower through the top of the extraction tower, and the light phase material is injected into the containing cavity of the extraction tower through the bottom of the extraction tower, so that the heavy phase material and the light phase material are countercurrently contacted in the containing cavity.

[0043] Specifically, the heavy phase material flows out from the first heavy phase storage tank 21, flows into the heavy phase feed pump 22, and then flows into the heavy phase feed distributor 112, and then flows into the containing cavity 111 after being distributed by the heavy phase feed distributor 112; the light phase material flows out from the first light phase storage tank 31, flows into the containing cavity 111 through the light phase feed pump 32, so that the heavy phase material and the light phase material are countercurrently contacted in the containing cavity;

[0044] (2) The driving motor 4331 drives the two lead screws 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 is located in the preset height range above the interface between the light phase (oil) and the heavy phase (water);

[0045] (3) At the same time, the gas pump 51 is opened, so that the gas flows into the extraction tower through the gas outlet pipe 52, thereby promoting the mixing of the materials;

[0046] (4) After a period of extraction, the gas injection is stopped, and after the heavy phase material and the light phase material are stratified, the discharge valve 131 is opened to discharge the heavy phase material and the light phase material into the liquid separation tank, and then the heavy phase material and the light phase material are separated through the liquid separation tank.

[0047] The technical scheme provided by the present application promotes the mixing of the heavy phase and the light phase by the air floating method, and the lifting driving 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 is located in the preset height range above the interface between the light phase and the heavy phase. When the heavy phase passes through each through hole on the movable baffle upward, the heavy phase is dispersed into small liquid beads, so that the heavy phase is fully contacted with the light phase above, the mixing effect is improved, and the extraction efficiency is improved.

[0048] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A laterite nickel ore leach liquor extraction column characterised in that, The application relates to an extraction column body, which comprises a column body, an accommodating cavity arranged in the column body, an upper clarifying tank arranged at the top of the column body, and a lower clarifying tank arranged at the bottom of the column body. A heavy phase feeding mechanism is arranged at the upper end of the accommodating cavity for inputting heavy phase materials. A light phase feeding mechanism is arranged in the lower clarifying tank for inputting light phase materials. A baffle mechanism comprises at least one movable baffle arranged in the column body and a lifting driving element, the movable baffle is densely provided with through holes, the lifting driving element is connected with the movable baffle and is used for driving the movable baffle to move up and down, so that the movable baffle is always located in the light phase in the column body and is located in a preset height range above the interface between the light phase and the heavy phase. An air distribution device is arranged in the column body for blowing gas into the column body. The top of the accommodating cavity is provided with a heavy phase feeding distributor, and the heavy phase feeding mechanism is used for inputting heavy phase materials into the heavy phase feeding distributor.

2. The laterite nickel ore leach liquor extraction column according to claim 1, characterised in that, The top end of the upper clarifying tank is provided with an exhaust valve, and the bottom of the lower clarifying tank is provided with a discharge valve.

3. The laterite nickel ore leach liquor extraction column according to claim 1, characterised in that, The heavy phase feeding mechanism comprises a first heavy phase storage tank and a heavy phase feeding pump, the first heavy phase storage tank is used for storing heavy phase materials, the inlet of the heavy phase feeding pump is communicated with the first heavy phase storage tank, and the outlet of the heavy phase feeding pump is communicated with the inlet of the heavy phase feeding distributor.

4. The laterite nickel ore leach liquor extraction column according to claim 2, characterised 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 for storing light phase materials, the inlet of the light phase feeding pump is communicated with the first light phase storage tank, and the outlet of the light phase feeding pump is communicated with the lower clarifying tank.

5. The laterite nickel ore leach liquor extraction column according to claim 1, characterised in that, The lifting driving element comprises two parallel screws rotatably arranged in the column body, a plurality of nuts are sleeved on the screws, and the opposite nuts on the two screws are fixed to the two sides of the movable baffle.

6. The laterite nickel ore leach liquor extraction column according to claim 1, characterised in that, The rotating driving element comprises a rotating driving motor, two transmission sprockets and a chain, the rotating driving motor is connected with one of the screws and is used for driving the screw to rotate, the two transmission sprockets are fixedly sleeved on the two screws, and the chain is wound around the two transmission sprockets.

7. The laterite nickel ore leach liquor extraction column according to claim 6, characterised in that, The air distribution device comprises a gas pump and an air outlet pipe, one end of the air outlet pipe is communicated with the outlet of the gas pump, and the other end of the air outlet pipe is communicated with the lower end of the column body.

8. The laterite nickel ore leach liquor extraction column according to claim 1, characterised in that, The air distribution device further comprises a backflow pipe, one end of the backflow pipe is communicated with the outlet of the exhaust valve, and the other end of the backflow pipe is communicated with the inlet of the gas pump.

9. The laterite nickel ore leach liquor extraction column according to claim 8, characterised in that, The air distribution device further comprises a gas pressure stabilizer arranged on the backflow pipe.

10. The laterite nickel ore leach liquor extraction column according to claim 9, characterised in that, ​

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