Lateritic nickel ore pulp thickener

Abstract

A lateritic nickel ore pulp thickener, comprising a thickener body (1), a plurality of turbidity measurement members (2), and a supernatant discharge mechanism (3). The thickener body (1) has a tapered accommodating cavity, a lateritic nickel ore pulp is introduced into the accommodating cavity, a discharge port (11) is formed in the bottom end of the thickener body (1), and a water discharge port (12) is formed in the lower end of the thickener body (1); the turbidity measurement members (2) are used for measuring the turbidities of the pulp at different depths in the accommodating cavity; and the supernatant discharge mechanism (3) comprises a lifting / lowering pipe (31), a connecting hose (32), and a lifting / lowering driving member (33). The height of the lifting / lowering pipe (31) is controlled by means of the lifting / lowering driving member (33), so that the height of a water inlet (311) of the lifting / lowering pipe (31) is equal to the corresponding height of the pulp having a preset turbidity, thereby preventing pulp waste caused by the over-high concentration of a discharged supernatant, and avoiding the technical problem of affecting the pulp thickening efficiency when the supernatant discharge rate is low caused by the height of a supernatant discharge port being too high.

Description

A laterite nickel ore slurry thickener Technical Field

[0001] The present invention relates to the technical field of thickeners, and in particular to a laterite nickel ore slurry thickener. Background Art

[0002] A thickener is a solid-liquid separation device based on gravity sedimentation (for details, refer to Chinese utility model patent application number CN201720688591.5). It is usually a cylindrical shallow trough with a conical bottom. A slurry containing 10% to 20% solids can be concentrated by gravity sedimentation into an underflow slurry with a solids content of 45% to 55%. With the help of a slow-running rake (1 / 3 to 1 / 5 rpm) installed in the thickener, the thickened underflow slurry is discharged from the underflow port at the bottom of the thickener. A relatively clean supernatant (overflow) is produced at the top of the thickener and discharged through an annular chute at the top.

[0003] For the development of laterite nickel ore, concentrating the laterite nickel ore slurry through a thickener can greatly reduce the operating costs of subsequent processes. Since existing thickeners basically discharge the supernatant from a ring chute at the top, the height of the ring chute is fixed. However, due to the continuous flow of slurry, the slurry concentration of the supernatant in the upper part of the thickener is constantly changing, which leads to a large fluctuation in the slurry concentration of the supernatant discharged from the ring chute. When the slurry concentration of the discharged supernatant is high, it will lead to slurry waste. At the same time, since the height of the ring chute is fixed and is usually set at the top of the thickener, only the top layer of the supernatant can be discharged, while the middle and lower layers of the supernatant cannot be discharged. The supernatant discharge efficiency is low, resulting in low thickening efficiency, and even hindering the normal operation of the entire ore washing process.

[0004] Summary of the Invention

[0005] In view of this, it is necessary to provide a laterite nickel ore slurry thickener to solve the technical problems that the slurry concentration of the supernatant discharged from the annular chute of the existing thickener fluctuates greatly, which may lead to slurry waste, and the supernatant discharge efficiency is low.

[0006] In order to achieve the above object, the present invention provides a laterite nickel ore slurry thickener, characterized in that it includes a thickener body, a plurality of turbidity detection components and a supernatant discharge mechanism;

[0007] The thickener body has a conical accommodating cavity, the accommodating cavity is used to pass the laterite nickel ore slurry, the bottom end of the thickener body is provided with a discharge port, and the lower end of the thickener body is provided with a drain port;

[0008] Each of the turbidity detection elements is arranged in sequence on the inner side wall of the accommodating chamber along the vertical direction, and is used to detect the turbidity of the slurry at different depths in the accommodating chamber;

[0009] The supernatant liquid discharge mechanism includes a lifting pipe, a connecting hose and a lifting drive member. The lifting pipe is arranged in the accommodating chamber and can move up and down. The upper end of the lifting pipe is sealed. A water inlet is provided on the side wall of the lifting pipe. A water inlet valve is provided on the water inlet. The lower end of the lifting pipe is connected to one end of the connecting hose, and the other end of the connecting hose is sealed with the drain port. The lifting drive member is used to control the height of the lifting pipe according to the turbidity of the slurry at different depths in the accommodating chamber measured by the turbidity detection member, so that the turbidity of the supernatant entering the water inlet is within a preset range.

[0010] In some embodiments, the turbidity detection component includes a fixed block, a laser emitter and a laser receiver. The fixed block is fixed on the inner wall of the accommodating cavity. The laser emitter and the laser receiver are both fixed to the fixed block. The laser emitter is used to emit a laser beam of preset intensity to the laser receiver. The laser receiver is used to receive the laser beam and detect the intensity of the received laser beam.

[0011] In some embodiments, the lifting drive member includes a vertical rod, a connecting plate and a lifting drive cylinder, one end of the vertical rod is fixedly connected to the lifting tube, the other end of the vertical rod is fixedly connected to the connecting plate, the cylinder body of the lifting drive cylinder is fixed on the thickener body, and the output shaft of the lifting drive cylinder is fixedly connected to the connecting plate.

[0012] In some embodiments, the stirring mechanism includes a stirring shaft, stirring blades and a stirring motor. The stirring shaft is rotatably arranged in the thickener body, the stirring blades are fixed on the stirring shaft, and the stirring motor is connected to the stirring shaft and is used to drive the stirring shaft to rotate.

[0013] In some embodiments, the stirring mechanism further includes a fixed sleeve, which is fixed to the inner top surface of the thickener body and sleeved on the stirring shaft, and the fixed sleeve is in clearance fit with the stirring shaft.

[0014] In some embodiments, the supernatant discharge mechanism further includes a baffle, which is fixed below the lifting pipe and located between the connecting hose and the stirring blade.

[0015] In some embodiments, a slurry inlet is provided at the middle height of the side wall of the thickener body, and the laterite nickel ore slurry thickener further includes a slurry inlet pipe, a first liquid level detection component and a slurry inlet valve. One end of the slurry inlet pipe is connected to the slurry inlet, and the other end of the slurry inlet pipe is used to pass slurry. The height of the other end of the slurry inlet pipe is higher than the top of the thickener body. The first liquid level detection component is arranged in the thickener body and is used to detect the liquid level of the slurry in the thickener body. The slurry inlet valve is arranged on the slurry inlet pipe and is used to control the slurry inlet flow rate in the slurry inlet pipe according to the liquid level detected by the first liquid level detection component, so that the slurry height in the thickener body is always maintained within a preset range.

[0016] In some embodiments, a discharge tee is fixed to the lower end of the discharge port, the first end of the discharge tee is connected to the discharge port, the second end of the discharge tee is connected to a discharge pipe, the third end of the discharge tee is connected to a detection pipe, a discharge valve is provided on the discharge pipe, and a detection valve is provided on the detection pipe; the laterite nickel ore slurry thickener also includes a discharge slurry concentration detection mechanism, the discharge slurry concentration detection mechanism includes a flip motor, a mounting plate, an electronic balance, a detection cylinder, a second liquid level detection component and a collection tank, the housing of the flip motor is fixed to the discharge pipe, the output shaft of the flip motor is fixedly connected to the mounting plate, the fixed end of the electronic balance is fixed to the mounting plate, the detection cylinder is fixed to the detection end of the electronic balance and is used to communicate with the detection tube, the second liquid level detection component is provided in the detection cylinder and is used to detect the liquid level of the slurry in the detection cylinder, and the collection tank is provided below the detection cylinder.

[0017] In some embodiments, the laterite nickel ore slurry thickener further includes a bracket, and the thickener body is fixed to the bracket.

[0018] In some embodiments, the supernatant discharge mechanism further includes a discharge pipe, one end of which is connected to the drain port.

[0019] Compared with the prior art, the beneficial effect of the technical solution proposed in the present invention is that: when in use, the laterite nickel ore slurry is passed into the accommodating cavity of the thickener body. Under the action of gravity, the slurry in the thickener body forms a concentration difference in depth, the slurry concentration in the lower part is large, the slurry concentration in the middle part is small, and the upper part is the supernatant. The turbidity of the slurry at different depths is detected by various turbidity detection components, thereby establishing a relationship between the turbidity of the slurry and the depth, thereby obtaining the height corresponding to the slurry with a preset turbidity, and then controlling the height of the lifting pipe by the lifting drive component so that the height of the water inlet of the lifting pipe is equal to the height corresponding to the slurry with the preset turbidity, and then opening the water inlet valve to allow the supernatant with the preset turbidity to enter the lifting pipe, and then enter the drain outlet through the connecting hose to be discharged. The present invention controls the height of the lifting pipe by means of a lifting drive member so that the height of the water inlet of the lifting pipe is equal to the height corresponding to the slurry of a preset turbidity. This can prevent the concentration of the discharged supernatant from being too high, which leads to waste of slurry, and can also avoid the technical problem of a low supernatant discharge rate due to an excessively high supernatant discharge port, which affects the slurry thickening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of an embodiment of a laterite nickel ore slurry thickener provided by the present invention;

[0021] FIG2 is a partial enlarged view of area A in FIG1 ;

[0022] FIG3 is a partial enlarged view of area B in FIG1 ;

[0023] FIG4 is a schematic structural diagram of the thickener body and the supernatant discharge mechanism in FIG1 ;

[0024] FIG5 is a schematic structural diagram of the discharge slurry concentration detection mechanism in FIG1 ;

[0025] In the figure: 1-thickener body, 11-discharge port, 12-drain port, 13-slurry inlet, 14-first liquid level detector, 15-discharge tee, 16-discharge pipe, 17-detection pipe, 18-discharge valve, 19-detection valve, 2-turbidity detector, 21-fixed block, 22-laser transmitter, 23-laser receiver, 3-supernatant liquid discharge mechanism, 31-lift pipe, 311-water inlet, 312-water inlet valve, 32-connecting hose, 33-lift drive Moving parts, 331-vertical rod, 332-connecting plate, 333-lifting drive cylinder, 34-discharge pipe, 35-baffle, 4-stirring mechanism, 41-stirring shaft, 42-stirring blade, 43-stirring motor, 44-fixed sleeve, 5-slurry inlet pipe, 51-slurry inlet valve, 6-discharge slurry concentration detection mechanism, 61-flip motor, 62-mounting plate, 63-electronic balance, 64-detection cylinder, 65-second liquid level detection component, 66-collecting tank, 7-bracket. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0027] 1 to 4 , the present invention provides a laterite nickel ore slurry thickener, comprising a thickener body 1 , a plurality of turbidity detection components 2 and a supernatant discharge mechanism 3 ;

[0028] The thickener body 1 has a conical accommodating cavity, into which laterite nickel ore slurry is introduced. A discharge port 11 is provided at the bottom end of the thickener body 1, and a drain port 12 is provided at the lower end of the thickener body 1.

[0029] Each of the turbidity detection elements 2 is arranged in sequence on the inner side wall of the accommodating chamber along the vertical direction, and is used to detect the turbidity of the slurry at different depths in the accommodating chamber;

[0030] The supernatant discharge mechanism 3 includes a lifting pipe 31, a connecting hose 32 and a lifting drive member 33. The lifting pipe 31 is arranged in the accommodating chamber and can move up and down. The upper end of the lifting pipe 31 is sealed. A water inlet 311 is provided on the side wall of the lifting pipe 31. A water inlet valve 312 is provided on the water inlet 311. The lower end of the lifting pipe 31 is connected to one end of the connecting hose 32. The other end of the connecting hose 32 is sealed and connected to the drain port 12. Since the other end of the connecting hose 32 is connected to the drain port 12, the water inlet valve 312 is provided on the water inlet 311. The water inlet 12 is sealed, so the drain port 12 is disconnected from the accommodating chamber of the thickener body 1. The slurry in the accommodating chamber cannot be discharged directly from the drain port 12. Instead, it can only enter the lift pipe 31 through the water inlet 311, then enter the connecting hose 32 from the lift pipe 31, and finally be discharged from the drain port 12. The lift drive 33 is used to control the height of the lift pipe 31 based on the turbidity of the slurry at different depths in the accommodating chamber measured by the turbidity detector 2, so as to ensure that the turbidity of the supernatant entering the water inlet 311 is within a preset range. It should be understood that although the drawings of the present invention only show one supernatant discharge mechanism 3, in actual use, multiple supernatant discharge mechanisms 3 can be provided to improve the efficiency of supernatant discharge.

[0031] During use, laterite nickel ore slurry (hereinafter referred to as slurry) is passed into the accommodating cavity of the thickener body 1. Under the action of gravity, the slurry in the thickener body 1 forms a concentration difference at depth. The slurry concentration in the lower part is high, the slurry concentration in the middle part is low, and the upper part is supernatant (i.e., slurry with very low concentration). The turbidity of the slurry at different depths is detected by each turbidity detection component 2, thereby establishing a relationship between the turbidity of the slurry and the depth, thereby obtaining the height corresponding to the slurry with a preset turbidity, and then controlling the height of the lifting pipe 31 by the lifting drive component 33 so that the height of the water inlet 311 of the lifting pipe 31 is equal to the height corresponding to the slurry with a preset turbidity, and then opening the water inlet valve 312, so that the supernatant with the preset turbidity enters the lifting pipe 31, and then enters the drain port 12 through the connecting hose 32 to be discharged. The present invention controls the height of the lifting pipe 31 by means of a lifting drive 33 so that the height of the water inlet 311 of the lifting pipe 31 is equal to the height corresponding to the slurry of a preset turbidity. This can prevent the concentration of the discharged supernatant from being too high, and can also avoid the technical problem of a low supernatant discharge rate due to an excessively high supernatant discharge port, which affects the slurry thickening efficiency.

[0032] It should be understood that the turbidity of the slurry is related to the concentration of the slurry. When the concentration of the slurry is small, the greater the concentration of the slurry, the greater the turbidity. However, when the concentration of the slurry increases to a certain level, the trend of the turbidity of the slurry will decrease. Therefore, reflecting the concentration of the slurry by detecting the turbidity of the slurry is only applicable to the case where the slurry concentration is small. In the present invention, since each turbidity detection element 2 is used to detect the turbidity of the supernatant at different depths, the slurry concentration of the supernatant is low, the concentration of the slurry can be reflected by detecting the turbidity of the slurry, which can ensure that the slurry concentration of the discharged supernatant is within the preset range.

[0033] To specifically implement the functions of the turbidity detector 2, referring to Figures 1 and 2, in a preferred embodiment, the turbidity detector 2 includes a fixed block 21, a laser emitter 22, and a laser receiver 23. The fixed block 21 is fixed to the inner wall of the accommodating chamber. The laser emitter 22 and the laser receiver 23 are both fixed to the fixed block 21. The laser emitter 22 is configured to transmit a laser beam of a preset intensity to the laser receiver 23. The laser receiver 23 is configured to receive the laser beam and detect the intensity of the received laser beam, thereby obtaining the laser beam intensity attenuation rate. The turbidity of the slurry can then be determined from the laser beam intensity attenuation rate. The principle behind this is that the greater the turbidity of the slurry, the higher the laser beam intensity attenuation rate when traveling the same distance within the slurry. Therefore, the turbidity of the slurry can be determined based on the laser beam intensity attenuation rate.

[0034] In order to facilitate the discharge of the supernatant, referring to FIG. 1 , in a preferred embodiment, the supernatant discharge mechanism 3 further includes a discharge pipe 34 , one end of which is connected to the drain port 12 .

[0035] In order to specifically realize the function of the lifting drive member 33, please refer to Figures 1 and 4. In a preferred embodiment, the lifting drive member 33 includes a vertical rod 331, a connecting plate 332 and a lifting drive cylinder 333. One end of the vertical rod 331 is fixedly connected to the lifting tube 31, and the other end of the vertical rod 331 is fixedly connected to the connecting plate 332. The cylinder body of the lifting drive cylinder 333 is fixed on the thickener body 1, and the output shaft of the lifting drive cylinder 333 is fixedly connected to the connecting plate 332. When in use, the vertical rod 331 is driven up and down by the lifting drive cylinder 333, thereby driving the lifting tube 31 to move up and down.

[0036] To improve the thickening efficiency, referring to FIG1 , in a preferred embodiment, the laterite nickel ore slurry thickener further includes a stirring mechanism 4, comprising a stirring shaft 41, stirring blades 42, and a stirring motor 43. The stirring shaft 41 is rotatably disposed within the thickener body 1, the stirring blades 42 are fixed to the stirring shaft 41, and the stirring motor 43 is connected to the stirring shaft 41 and is used to drive the stirring shaft 41 to rotate. During use, the stirring mechanism 4 can improve the uniformity of the slurry at different locations, preventing uneven accumulation of the slurry that would result in poor thickening effect.

[0037] In order to prevent the supernatant from being disturbed when the stirring shaft 41 rotates, please refer to Figures 1 and 3. In a preferred embodiment, the stirring mechanism 4 further includes a fixed sleeve 44. The fixed sleeve 44 is fixed to the top surface of the thickener body 1 and is sleeved on the stirring shaft 41. The fixed sleeve 44 is loosely fitted with the stirring shaft 41. By providing the fixed sleeve 44, the supernatant will not be disturbed when the stirring shaft 41 rotates, thereby facilitating the sedimentation of suspended mineral particles in the supernatant.

[0038] In order to prevent the connecting hose 32 from moving laterally when the lifting tube 31 descends and contacting the stirring blades 42, thereby causing damage, as shown in Figures 1 and 4, in a preferred embodiment, the supernatant discharge mechanism 3 further includes a baffle 35. The baffle 35 is fixed below the lifting tube 31 and located between the connecting hose 32 and the stirring blades 42 to separate them. The baffle 35 is provided because when the lifting tube 31 descends, the connecting hose 32 bends and moves laterally, which may cause a collision with the stirring blades 42. Therefore, by providing the baffle 35 to separate the two, the connecting hose 32 can be prevented from being cut by the stirring blades 42.

[0039] In order to facilitate automatic slurry feeding, please refer to Figures 1 and 4. In a preferred embodiment, a slurry inlet 13 is opened at the middle height of the side wall of the thickener body 1. The laterite nickel ore slurry thickener also includes a slurry inlet pipe 5, a first liquid level detection component 14 and a slurry inlet valve 51. One end of the slurry inlet pipe 5 is connected to the slurry inlet 13, and the other end of the slurry inlet pipe 5 is used to pass slurry. The height of the other end of the slurry inlet pipe 5 is higher than the top of the thickener body 1. The first liquid level detection component 14 is arranged in the thickener body 1 and is used to detect the liquid level of the slurry in the thickener body 1. The slurry inlet valve 51 is arranged on the slurry inlet pipe 5 and is used to control the slurry inlet flow rate in the slurry inlet pipe 5 according to the liquid level detected by the first liquid level detection component 14, so that the slurry height in the thickener body 1 is always maintained within a preset range. It should be pointed out that the reason why the slurry inlet 13 is opened at the middle height of the side wall of the thickener body 1 in the present invention, instead of feeding from the top as conventionally set, is to avoid violent disturbance of the supernatant when the slurry is introduced into the slurry inlet 13. Because if the slurry is fed directly from the top, the supernatant will become turbid when the slurry is introduced. In the present invention, by opening the slurry inlet 13 at the middle height of the side wall of the thickener body 1, the slurry can be directly introduced into the middle and lower part of the thickener to reduce interference with the supernatant. At the same time, in order to avoid the slurry in the thickener from flowing back into the slurry inlet pipe 5, the entrance of the slurry inlet pipe 5 should be higher than the top of the thickener body 1.

[0040] In order to facilitate the control of the concentration of the discharged concentrated slurry, please refer to Figures 1 and 5. In a preferred embodiment, a discharge tee 15 is also fixed to the lower end of the discharge port 11, the first end of the discharge tee 15 is connected to the discharge port 11, the second end of the discharge tee 15 is connected to a discharge pipe 16, the third end of the discharge tee 15 is connected to a detection pipe 17, the discharge pipe 16 is provided with a discharge valve 18, and the detection pipe 17 is provided with a detection valve 19; the laterite nickel ore slurry thickener also includes a discharge slurry concentration detection mechanism 6, the discharge slurry concentration detection mechanism 6 includes a flip motor 61, a mounting plate 62, an electronic balance 63, a detection cylinder 64, a second liquid level detection member 65 and a collecting tank 66, the shell of the flip motor 61 is fixed to the discharge pipe 16, the output shaft of the flip motor 61 is fixedly connected to the mounting plate 62, the electronic balance 63 The fixed end is fixed to the mounting plate 62, the detection cylinder 64 is fixed to the detection end of the electronic balance 63 and is used to communicate with the detection tube 17, the second liquid level detection member 65 is arranged in the detection cylinder 64, and is used to detect the liquid level of the slurry in the detection cylinder 64, and the collection tank 66 is arranged below the detection cylinder 64.

[0041] Please continue to refer to Figures 1 and 5. When in use, first close the discharge valve 18 and open the detection valve 19. At this time, the slurry discharged from the discharge port 11 enters the detection tube 17 and then flows into the detection cylinder 64. The second liquid level detection member 65 detects the liquid level of the slurry in the detection cylinder 64. When it reaches a preset height, close the discharge valve 18. At this time, the electronic balance 63 detects the weight of the slurry in the detection cylinder 64, and then calculates the volume of the slurry according to the liquid level of the slurry, thereby obtaining the density of the slurry. Then, the concentration of the slurry is obtained according to the density of the slurry. When the concentration of the slurry is low, the slurry volume is calculated. At the preset concentration, the discharge valve 18 continues to be closed, waiting for the slurry to be further concentrated. When the concentration of the slurry exceeds the preset concentration, the discharge valve 18 opens, thereby ensuring that the concentration of the output slurry remains stable. During use, samples are usually taken every ten minutes. After each test is completed, the turning motor 61 drives the detection cylinder 64 to rotate 180° so that the detection cylinder 64 faces downward, so that the slurry therein will fall into the collection tank 66 below. When the collection tank 66 is full, the slurry in the collection tank 66 is poured into the thickener body 1 manually or mechanically to avoid waste.

[0042] It should be noted that since the slurry discharged from the discharge port 11 has a very high concentration, the concentration of the slurry cannot be determined by detecting the turbidity of the slurry. Therefore, the present invention adopts a specially designed discharge slurry concentration detection mechanism to detect the density of the slurry and then obtain the concentration of the slurry.

[0043] In order to facilitate the fixation of the thickener body 1 , referring to FIG. 1 , in a preferred embodiment, the laterite nickel ore slurry thickener further includes a bracket 7 , and the thickener body 1 is fixed to the bracket 7 .

[0044] In order to better understand the present invention, the working process of the laterite nickel ore slurry thickener provided by the present invention is described in detail below with reference to Figures 1 to 5: When in use, the laterite nickel ore slurry is passed into the accommodating chamber of the thickener body 1. Under the action of gravity, the slurry in the thickener body 1 forms a concentration difference at depth, the slurry concentration in the lower part is high, the slurry concentration in the middle part is low, and the upper part is the supernatant. The turbidity of the slurry at different depths is detected by each turbidity detection member 2, thereby establishing a relationship between the turbidity of the slurry and the depth, thereby obtaining the height corresponding to the slurry with a preset turbidity, and then controlling the height of the lifting pipe 31 by the lifting drive member 33 so that the height of the water inlet 311 of the lifting pipe 31 is equal to the height corresponding to the slurry with a preset turbidity, and then opening the water inlet valve 312, so that the supernatant with the preset turbidity enters the lifting pipe 31, and then enters the drain port 12 through the connecting hose 32 to be discharged. The present invention controls the height of the lifting pipe 31 by means of a lifting drive 33 so that the height of the water inlet 311 of the lifting pipe 31 is equal to the height corresponding to the slurry of a preset turbidity. This can prevent the concentration of the discharged supernatant from being too high, and can also avoid the technical problem of a low supernatant discharge rate due to an excessively high supernatant discharge port, which affects the slurry thickening efficiency.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A laterite nickel ore slurry thickener, characterized in that: It includes a thickener body, several turbidity detection components and a supernatant discharge mechanism; The thickener body has a conical accommodating cavity, the accommodating cavity is used to pass the laterite nickel ore slurry, the bottom end of the thickener body is provided with a discharge port, and the lower end of the thickener body is provided with a drainage port; Each of the turbidity detection components is arranged in sequence on the inner side wall of the accommodating chamber along the vertical direction, and is used to detect the turbidity of the slurry at different depths in the accommodating chamber; The supernatant liquid discharge mechanism includes a lifting pipe, a connecting hose and a lifting drive member. The lifting pipe is arranged in the accommodating chamber and can move up and down. The upper end of the lifting pipe is sealed. A water inlet is provided on the side wall of the lifting pipe. A water inlet valve is provided on the water inlet. The lower end of the lifting pipe is communicated with one end of the connecting hose, and the other end of the connecting hose is sealed and connected to the drain port. The lifting drive member is used to control the height of the lifting pipe according to the turbidity of the slurry at different depths in the accommodating chamber measured by the turbidity detection member, so that the turbidity of the supernatant entering the water inlet is within a preset range.

2. The laterite nickel ore slurry thickener according to claim 1, characterized in that: The turbidity detection component includes a fixed block, a laser transmitter and a laser receiver. The fixed block is fixed on the inner wall of the accommodating cavity. The laser transmitter and the laser receiver are both fixed on the fixed block. The laser transmitter is used to transmit a laser beam of preset light intensity to the laser receiver. The laser receiver is used to receive the laser beam and detect the intensity of the received laser beam.

3. The laterite nickel ore slurry thickener according to claim 1, characterized in that: The lifting drive member includes a vertical rod, a connecting plate and a lifting drive cylinder. One end of the vertical rod is fixedly connected to the lifting tube, and the other end of the vertical rod is fixedly connected to the connecting plate. The cylinder body of the lifting drive cylinder is fixed on the thickener body, and the output shaft of the lifting drive cylinder is fixedly connected to the connecting plate.

4. The laterite nickel ore slurry thickener according to claim 1, characterized in that: The stirring mechanism comprises a stirring shaft, stirring blades and a stirring motor. The stirring shaft is rotatably arranged in the thickener body. The stirring blades are fixed on the stirring shaft. The stirring motor is connected to the stirring shaft and is used to drive the stirring shaft to rotate.

5. The laterite nickel ore slurry thickener according to claim 4, characterized in that: The stirring mechanism further comprises a fixed sleeve, which is fixed to the inner top surface of the thickener body and sleeved on the stirring shaft, and the fixed sleeve is in clearance fit with the stirring shaft.

6. The laterite nickel ore slurry thickener according to claim 1, characterized in that: The supernatant liquid discharge mechanism further comprises a baffle, which is fixed below the lifting pipe and located between the connecting hose and the stirring blade.

7. The laterite nickel ore slurry thickener according to claim 1, characterized in that: A slurry inlet is provided at the middle height of the side wall of the thickener body. The laterite nickel ore slurry thickener also includes a slurry inlet pipe, a first liquid level detection component and a slurry inlet valve. One end of the slurry inlet pipe is connected to the slurry inlet, and the other end of the slurry inlet pipe is used for introducing slurry. The height of the other end of the slurry inlet pipe is higher than the top of the thickener body. The first liquid level detection component is arranged in the thickener body and is used to detect the liquid level of the slurry in the thickener body. The slurry inlet valve is arranged on the slurry inlet pipe and is used to control the slurry inlet flow rate in the slurry inlet pipe according to the liquid level detected by the first liquid level detection component, so that the slurry height in the thickener body is always maintained within a preset range.

8. The laterite nickel ore slurry thickener according to claim 1, characterized in that: A discharge tee is also fixed to the lower end of the discharge port, a first end of the discharge tee is communicated with the discharge port, a second end of the discharge tee is connected to a discharge pipe, a third end of the discharge tee is connected to a detection pipe, a discharge valve is arranged on the discharge pipe, and a detection valve is arranged on the detection pipe; the laterite nickel ore slurry thickener also includes a discharge slurry concentration detection mechanism, the discharge slurry concentration detection mechanism includes a flip motor, a mounting plate, an electronic balance, a detection cylinder, a second liquid level detection member and a collecting tank, the housing of the flip motor is fixed to the discharge pipe, the output shaft of the flip motor is fixedly connected to the mounting plate, the fixed end of the electronic balance is fixed to the mounting plate, the detection cylinder is fixed to the detection end of the electronic balance and is used to communicate with the detection tube, the second liquid level detection member is arranged in the detection cylinder and is used to detect the liquid level of the slurry in the detection cylinder, and the collecting tank is arranged below the detection cylinder.

9. The laterite nickel ore slurry thickener according to claim 1, characterized in that: It also includes a bracket, and the thickener body is fixed to the bracket.

10. The laterite nickel ore slurry thickener according to claim 1, characterized in that: The supernatant discharge mechanism further includes a discharge pipe, one end of which is connected to the drain port.

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