Dual-screw washing machine for laterite nickel ore

Abstract

This application relates to a dual-screw washing machine for laterite nickel ore, which includes a washing tank, a dual-screw device, a feed pipe, a flushing water pipe, a lifting device, and an automatic control unit. The washing tank comprises a bottom tank and an inclined tank interconnected therewith; the dual-screw device is arranged along the inclined tank; the feed pipe and the flushing water pipe are arranged towards the dualscrew device; the lifting device is connected to the dual-screw device to drive a part or the entire dual-screw device to move upwards away from the inclined tank; the automatic control unit is used to control the lifting device to act according to the shutdown signal of the dual-screw device and to drive the flushing water pipe to clean the dual-screw device and the inclined tank. Compared to existing technology, the dual-screw washing machine for laterite nickel ore provided by this application can lift the dual-screw device after it is shut down and drive the flushing water pipe to clean the dual-screw device and the inclined tank, avoiding the jamming of the device by pebbles and ore, and can also be directly started for the next washing, saving a lot of cleaning time and improving production efficiency.

Description

[0001] Description

[0002] DUAL-SCREW WASHING MACHINE FOR LATERITE NICKEL ORE

[0003] FILED OF DISCLOSURE

[0004] This application relates to the field of washing machine technology, particularly to a dual-screw washing machine for laterite nickel ore.

[0005] BACKGROUND

[0006] In the hydrometallurgical process of laterite nickel ore, due to the presence of a small amount of pebbles in the laterite nickel ore, which can have adverse effects on subsequent processes, it is necessary to use a washing machine to clean the laterite nickel ore to remove the small amount of pebbles.

[0007] The dual-screw washing machine is a type of washing machine, which is widely used in the washing process of laterite nickel ore because it can better scrub out small pebbles in the ore pulp. However, in the actual washing process, after the dualscrew washing machine stops washing, the pebbles in the pulp will deposit in the gap between the two screw shafts, filling the gap and causing the screw shafts to jam. Moreover, as the water evaporates, the pulp attached to the screw shafts will precipitate and solidify, further filling the gap and jamming the screw shafts, making it necessary to clean before the dualscrew washing machine can be restarted.

[0008] However, due to the complex structure of the screw shafts and the many gaps, it is difficult to quickly clean with electric chisels, shovels, and other equipment, and can only be manually cleaned by hand, which takes a long time.

[0009] SUMMARY

[0010] In view of this, there is a need to provide a dual-screw washing machine for laterite nickel ore to solve the technical problem in the existing technology that the dual-screw washing machine needs to be manually cleaned for a long time after stopping before it can be restarted.

[0011] This application provides a dual-screw washing machine for laterite nickel ore, which includes: a washing tank, a dualscrew device, a feed pipe, a flushing water pipe, a lifting device, and an automatic control unit. The washing tank includes an interconnected bottom tank and an inclined tank, the bottom tank has an overflow outlet for discharging ore pulp, and the inclined tank has a discharge outlet for discharging pebbles; the dual-screw device is arranged along the inclined tank, its lower end extends into the bottom tank, and the dual-screw device is used to drive pebbles towards the discharge outlet; the feed pipe and the flushing water pipe are arranged towards the dualscrew device; the lifting device is connected to the dual-screw device to drive a part or the entire dual-screw device to move upwards away from the inclined tank; the automatic control unit is used to control the lifting device to act according to the shutdown signal of the dual-screw device and to drive the flushing water pipe to clean the dual-screw device and the inclined tank.

[0012] Further, it also includes a lower pivot seat, which is arranged at the bottom of the bottom tank, and the lower end of the dual-screw device is rotatably connected to the lower pivot seat, and the lifting device is connected to the upper end of the dual-screw device.

[0013] Further, it also includes an upper pivot seat, which is arranged at the upper end of the inclined tank, and the upper end of the dual-screw device is rotatably connected to the upper pivot seat, and the lifting device is connected to the lower end of the dual-screw device.

[0014] Further, the lifting device is connected to both the upper and lower ends of the dual-screw device to lift the entire dualscrew device.

[0015] Further, the dual-screw device includes two screw shafts, a transmission mechanism, and a scrubbing drive mechanism, the two screw shafts are arranged side by side along the inclined tank with a gap therebetween, the scrubbing drive mechanism is connected to the two screw shafts through the transmission mechanism to drive the rotation of the two screw shafts; the scrubbing drive mechanism and the transmission mechanism are located at the upper end of the dual-screw device.

[0016] Further, the dual-screw device further includes an upper mounting seat and a lower mounting seat, the upper mounting seat is fixedly connected to the scrubbing drive mechanism, the lower mounting seat is rotatably connected to the lower end of the screw shaft; the lifting device is connected to the upper mounting seat and / or the lower mounting seat.

[0017] Further, the lifting device includes a plurality of hydraulic cylinders, the hydraulic cylinders are connected to the upper mounting seat and / or the lower mounting seat.

[0018] Further, the lifting device includes a winch, a lifting drive mechanism, a plurality of guide pulleys, and a traction cable, one end of the traction cable is wound on the winch, the other end sequentially passes through the guide pulleys and is connected to the dual-screw device, the lifting drive mechanism is connected to the winch to drive the rotation of the winch.

[0019] Further, the lifting device further includes a guide rail and a walking mechanism, the guide rail is arranged above the dualscrew device, the walking mechanism is arranged on the guide rail and can move along the guide rail, the winch, the lifting drive mechanism, and the guide pulleys are all arranged on the walking mechanism.

[0020] Further, the automatic control unit further includes a switch module, a recognition module, and a control module, the switch module is electrically connected to the dual-screw device to control the start or shutdown of the dual-screw device, the recognition module is used to obtain the shutdown signal and start signal of the dual-screw device, the control module controls the lifting device to perform the first action according to the shutdown signal, and performs the second action after a set time, and simultaneously controls the flushing water pipe to perform the third action within the set time; the first action is the action of the lifting device driving the dual-screw device to lift from the initial position, the second action is the action of the lifting device driving the dual-screw device to descend a set distance, the third action is the action of the flushing water pipe flushing the dual-screw device and the inclined tank; the control module is also used to control the lifting device to perform the fourth action according to the start signal, the fourth action is the action of the lifting device driving the dual-screw device to descend to the initial position .

[0021] Compared with existing technology, the dual-screw washing machine for laterite nickel ore provided by this application has a lifting device, which lifts the dual-screw device after it is shut down and drives the flushing water pipe to clean the dualscrew device and the inclined tank, avoiding the jamming of the device by pebbles and ore, and can also be directly started for the next washing, saving a lot of cleaning time and improving production efficiency.

[0022] The above description is only an overview of the technical solution of this application. For a clearer understanding of the technical means of this application and to implement it according to the content of the specification, the best embodiment of this application and its detailed description are given below in conjunction with the drawings. The specific implementation of this application is detailed in the following examples and drawings .

[0023] BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The figures described herein are provided for further understanding of this application and form a part of this application. The illustrative embodiments and their description are used to explain this application and do not constitute an undue limitation on the scope of this application. In the figures:

[0025] FIG. 1 is a schematic diagram of the structure of a first embodiment of the dual-screw washing machine for laterite nickel ore provided in this application;

[0026] FIG. 2 is a schematic diagram of the structure of a second embodiment of the dual-screw washing machine for laterite nickel ore provided in this application; FIG. 3 is a schematic diagram of the structure of a third embodiment of the dual-screw washing machine for laterite nickel ore provided in this application;

[0027] FIG. 4 is a schematic diagram of the structure of a fourth embodiment of the dual-screw washing machine for laterite nickel ore provided in this application;

[0028] FIG. 5 is a schematic diagram of the structure of a fifth embodiment of the dual-screw washing machine for laterite nickel ore provided in this application;

[0029] FIG. 6 is a schematic diagram of the structure of a sixth embodiment of the dual-screw washing machine for laterite nickel ore provided in this application;

[0030] FIG. 7 is a control block diagram of a preferred embodiment of the dual-screw washing machine for laterite nickel ore provided in this application.

[0031] DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0032] The following describes the preferred embodiment of this application in detail, with the figures forming a part of this application and used together with the examples of this application to explain the principles of this application, and not to limit the scope of this application.

[0033] This application provides a dual-screw washing machine for laterite nickel ore. The dual-screw washing machine for laterite nickel ore can be used in the washing operation of laterite nickel ore, by lifting the dual-screw device out of the pulp after stopping, to avoid the jamming of the dual-screw device by pebbles and ore, leading to the need to spend a long time manually cleaning before it can be restarted.

[0034] It should be noted that the dual-screw washing machine for laterite nickel ore in this application is used but not limited to the washing operation of laterite nickel ore, and can also be used in the washing operation of other types of ores. In this application, only the application of the dual-screw washing machine for laterite nickel ore in laterite nickel ore is used as an example for illustration, and the principle of the dualscrew washing machine for laterite nickel ore applied to other ore washing is essentially the same as that applied to laterite nickel ore, which is not repeated here.

[0035] Embodiment One

[0036] Refer to Figure 1, this dual-screw washing machine for laterite nickel ore includes a washing tank 1, a dual-screw device 2, a feed pipe 3, a flushing water pipe 4, a lifting device 5, and an automatic control unit. The washing tank 1 includes an interconnected bottom tank 11 and an inclined tank 12, the bottom tank 11 has an overflow outlet 111 for discharging ore pulp, and the inclined tank 12 has a discharge outlet 121 for discharging pebbles. The dual-screw device 2 is arranged along the inclined tank 12, and its lower end extends into the bottom tank 11. The dual-screw device 2 is used to drive pebbles towards the discharge outlet 121. The feed pipe 3 and the flushing water pipe 4 are arranged towards the dual-screw device 2 for inputting ore pulp and cleaning water. The lifting device 5 is connected to the dual-screw device 2 to drive a part or the entire dual-screw device 2 to move upwards away from the inclined tank 12. The automatic control unit is used to control the lifting device 5 to act according to the shutdown signal of the dual-screw device 2 and to drive the flushing water pipe 4 to clean the dual-screw device 2 and the inclined tank 12.

[0037] The feed pipe 3 guides the ore pulp containing pebbles to the dual-screw device 2. Pebbles, being larger in volume, are driven upwards by the dual-screw device 2 until they fall out from the discharge outlet 121. The ore pulp, under the influence of gravity, flows downward along the inclined tank 12 and enters the bottom tank 11. The bottom tank 11 also serves to separate by settling, where some pebbles that enter the bottom tank 11 will settle at the bottom and be pushed towards the discharge outlet 121 by the dual-screw device 2. The ore pulp then flows out from the overflow outlet 111, achieving the purpose of removing pebbles from the ore pulp. The flushing water pipe 4 is used to spray clean water towards the dual-screw device 2 to wash off the ore pulp adhering to the pebbles, reducing the loss of ore pulp.

[0038] In some embodiments, the dual-screw device 2 includes two screw shafts 21, a transmission mechanism (not shown) , and a scrubbing drive mechanism 22. The two screw shafts 21 are arranged side by side along the inclined tank 12 with a gap therebetween, and the scrubbing drive mechanism 22 is connected to the two screw shafts 21 through the transmission mechanism to drive the rotation of the two screw shafts 21. The scrubbing drive mechanism 22 and the transmission mechanism are located at the upper end of the dual-screw device 2. The scrubbing drive mechanism 22 can use a suitable model of the motor and is placed on the inclined tank 12. The transmission mechanism can use gear mechanisms, chain wheel mechanisms, and other forms to achieve the transmission effect.

[0039] In the preferred embodiment, the dual-screw device 2 also includes an upper mounting seat 23 and a lower mounting seat 24. The upper mounting seat 23 is fixedly connected to the scrubbing drive mechanism 22, and the lower mounting seat 24 contains a bearing, the inner ring of which is rotatably connected to the lower end of the screw shaft 21. The upper and lower mounting seats 23 and 24 are used to connect and fix the scrubbing drive mechanism 22 and the screw shaft 21 to facilitate the connection of the scrubbing drive mechanism 22 and the screw shaft 21 with the lifting device 5. The lifting device 5 is connected to the upper mounting seat 23 and / or the lower mounting seat 24.

[0040] In some embodiments, the flushing water pipe 4 is closer to the discharge outlet 121 than the feed pipe 3.

[0041] In some embodiments, the outlet ends of the feed pipe 3 and the flushing water pipe 4 are movable, for example, a section of the feed pipe 3 near the outlet end is a rotatable structure, and the flushing water pipe 4 can use a hose. In this way, when lifting the dual-screw device 2, it can make space to avoid interference with the dual-screw device 2. And after lifting the dual-screw device 2, the flushing water pipe 4 can also be used to wash the screw shaft 21 and the inclined tank 12, washing away the pebbles and ore pulp on the screw shaft 21 and the inclined tank 12 to prevent the screw shaft 21 from being jammed by pebbles and solidified ore pulp.

[0042] In this embodiment, a single-sided lifting method for the dual-screw device 2 is adopted. The bottom of the bottom tank 11 is provided with a lower pivot seat 6, and the lower end of the dual-screw device 2 is rotatably connected to the lower pivot seat 6, that is, the lower mounting seat 24 is rotatably connected to the lower pivot seat 6. The lifting device 5 is connected to the upper end of the dual-screw device 2, such as to the upper mounting seat 23, to drive the dual-screw device 2 to rotate upwards around the lower pivot seat 6 by a certain distance, creating a larger gap between the dual-screw device 2 and the inclined tank 12 that allows pebbles to pass through freely. Then use the flushing water pipe 4 to wash the screw shaft 21 and the inclined tank 12, after the cleaning is completed, put the screw shaft 21, transmission mechanism, and scrubbing drive mechanism 22 back onto the inclined tank 12, and the dual-screw device 2 can be directly started for the next washing .

[0043] It should be noted that there is a lot of ore pulp in the bottom tank 11, and it will not evaporate completely in a short time, such as from the evening stop to the morning start of the next day for more than ten hours, resulting in solidification. Therefore, the jamming of the screw shaft 21 by pebbles and solidified ore pulp mainly occurs in the part above the water surface. For long-term shutdowns, it is necessary to completely empty and clean the bottom tank 11.

[0044] In this embodiment, the lifting device 5 uses a hydraulic cylinder, which is connected to the upper mounting seat 23 to push the upper mounting seat 23 to rotate upwards or downwards. Since the lifting range required is not large, only a certain amount of play should be reserved at the connection to avoid motion interference. For example, a connection form with two connecting rings can be used. During washing, the hydraulic cylinder can also provide a sufficient downward force for the dual-screw device 2, so that the screw shaft 21 will not be lifted by the reaction force of the pebbles. Embodiment Two

[0045] Refer to Figure 2, in this embodiment, the same single-sided lifting method for the dual-screw device 2A is adopted, but different from Embodiment One, the lifting device 5A lifts the lower end of the dual-screw device 2A. That is, an upper pivot seat 7A is set at the upper end of the inclined tank 12A, and the upper end of the dual-screw device 2A is rotatably connected to the upper pivot seat 7A, that is, the upper mounting seat is rotatably connected to the upper pivot seat 7A. The lifting device 5A is connected to the lower end of the dual-screw device 2A, that is, connected to the lower mounting seat. The lifting device 5A is similar to Embodiment One, also using a hydraulic cylinder, pulling the dual-screw device 2A to rotate upwards around the upper pivot seat 7A, creating a sufficient gap between the screw shaft and the inclined tank 12A, and then using the flushing water pipe 4A to wash the dual-screw device 2A and the inclined tank 12A clean.

[0046] Embodiment Three

[0047] Refer to Figure 3, in this embodiment, a method of lifting the entire dual-screw device 2B is adopted. The lifting device 5B is connected to both the upper and lower ends of the dualscrew device 2B to lift the entire dual-screw device 2B. For example, two sets of hydraulic cylinders can be used, respectively connected to the upper and lower mounting seats, to lift the entire dual-screw device 2B at the same time, and then use the flushing water pipe 4B to wash the dual-screw device 2B and the inclined tank 12B clean.

[0048] Embodiment Four

[0049] Refer to Figure 4, in this embodiment, the lifting device 5C includes a winch 51, a lifting drive mechanism (not shown) , a plurality of guide pulleys 53, and a traction cable 54. The traction cable 54 can be a steel cable, one end wound on the winch 51, and the other end sequentially passes through the guide pulleys 53 and is connected to the dual-screw device 2. The lifting drive mechanism is connected to the winch 51 to drive the rotation of the winch 51, thus lifting or lowering the dualscrew device 2. The lifting drive mechanism can use a suitable model of the motor to drive the rotation of the winch 51.

[0050] In the preferred embodiment, the lifting device 5 also includes a guide rail 55 and a walking mechanism 56, the guide rail 55 is arranged above the dual-screw device 2C, the walking mechanism 56 is arranged on the guide rail 55 and can move along the guide rail 55, the winch 51, the lifting drive mechanism, and the guide pulleys 53 are all arranged on the walking mechanism 56. The walking mechanism 56 drives the winch 51 to move, and cooperates with the rotation of the winch 51 to pull the dual-screw device 2C to a suitable position. It is easy to understand that the walking mechanism 56 includes a connecting unit matched with the guide rail 55 and a driving unit for moving itself along the guide rail 55.

[0051] Similar to Embodiment One, in this embodiment, a single-sided lifting method for the dual-screw device 20 is adopted, the lower end of the dual-screw device 2C is rotatably connected to the lower pivot seat 60, and the traction cable 54 is connected to the upper end of the dual-screw device 2C, thus pulling the dualscrew device 20 to rotate upwards around the lower pivot seat 60, facilitating the flushing water pipe 40 to wash the dualscrew device 20 and the inclined tank 12C clean.

[0052] Embodiment Five

[0053] Refer to Figure 5, in this embodiment, similar to Embodiment Two, a single-sided lifting method for the dual-screw device 2D is adopted, and the lifting device 5D lifts the lower end of the dual-screw device 2D. That is, an upper pivot seat 7D is set at the upper end of the inclined tank 12D, and the upper end of the dual-screw device 2D is hinged to the upper pivot seat 7D. The lifting device 5D is connected to the lower end of the dualscrew device 2D. The lifting device 5D pulls the dual-screw device 2D to rotate around the upper pivot seat 7D, facilitating the flushing water pipe 4D to wash the dual-screw device 2D and the inclined tank 12D clean.

[0054] Embodiment Six

[0055] Refer to Figure 6, in this embodiment, similar to Embodiment Three, a method of lifting the entire dual-screw device 2E is adopted. The dual-screw device 2E is placed on the inclined tank 12E by a stop block, and the lifting device 5E is connected to both the upper and lower ends of the dual-screw device 2E to lift the entire dual-screw device 2E. For example, two walking mechanisms can be set on the guide rail, and each walking mechanism is equipped with a winch, a lifting drive mechanism, a plurality of guide pulleys, and a traction cable, respectively connected to the upper and lower ends of the dual-screw device 2E, thus lifting the entire dual-screw device 2E at the same time, and then using the flushing water pipe 4E to wash the dualscrew device 2E and the inclined tank 12E clean.

[0056] Refer to Figure 7, in some embodiments, the automatic control unit includes a switch module 100, a recognition module 200, and a control module 300. The switch module 100 is electrically connected to the dual-screw device 2 to control the start or shutdown of the dual-screw device 2. The recognition module 200 is connected to the switch module 100 and the control module 300 and is used to obtain the shutdown signal and start signal of the dual-screw device 2. The control module 300 controls the lifting device 5 to perform the first action according to the shutdown signal, and performs the second action after a set time, and simultaneously controls the flushing water pipe 4 to perform the third action within the set time. The first action is the action of the lifting device 5 driving the dual-screw device 2 to lift from the initial position, the second action is the action of the lifting device 5 driving the dual-screw device 2 to descend a set distance, and the third action is the action of the flushing water pipe 4 flushing the dual-screw device 2 and the inclined tank 12; the control module 300 is also used to control the lifting device 5 to perform the fourth action according to the start signal, the fourth action is the action of the lifting device 5 driving the dual-screw device 2 to descend to the initial position. It should be noted that the set distance in this embodiment should be less than the reset distance of the dual-screw device 2. Generally speaking, the reset distance is the distance to return to the initial position after lifting, that is, the sum of the distances descended in the second and fourth actions. For example, the first action drives the dual-screw device 2 to lift by 10cm, the set distance is 5cm, that is, the dual-screw device 2 descends by 5cm in the second action, and then the dual-screw device 2 descends by 5cm in the fourth action. In this embodiment, after cleaning, some pebbles may be deposited in the bottom tank 11, which will affect the complete reset of the lower end of the dual-screw device 2. This embodiment avoids the jamming of the dual-screw device 2 by controlling the dual-screw device 2 to descend a set distance first, and then starting the dual-screw device 2 to rotate and then descending the remaining distance until reset, which can prevent interference between the dual-screw device 2 and the cleaned pebbles and prevent the dual-screw device 2 from being unable to reset.

[0057] In the preferred embodiment, a motion mechanism can also be set up to connect with the flushing water pipe 4, and the control module 300 is also connected to this motion mechanism, controlling the motion mechanism to drive the flushing water pipe 4 to move, thus flushing the screw shaft 21 and the inclined tank 12 clean. The control module 300 has a built-in timer, and after a period of time, it can be considered that it has been cleaned. The control module 300 controls the lifting device 5 to put the dual-screw device 2 back to the original position, and then controls the electric control valve on the flushing water pipe 4 to close.

[0058] Compared with existing technology, the dual-screw washing machine for laterite nickel ore provided by this application has a lifting device, which lifts the dual-screw device after it is shut down and drives the flushing water pipe to clean the dualscrew device and the inclined tank, avoiding the jamming of the device by pebbles and ore, and can also be directly started for the next washing, saving a lot of cleaning time and improving production efficiency.

[0059] The above description is only the best specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art, within the technical scope disclosed by this application, can easily think of variations or replacements, which should be covered within the scope of protection of this application .

Claims

WHAT IS CLAIMED IS1.A dual-screw washing machine for laterite nickel ore, characterized by comprising: a washing tank, a dual-screw device, a feed pipe, a flushing water pipe, a lifting device, and an automatic control unit, wherein the washing tank includes an interconnected bottom tank and an inclined tank, the bottom tank has an overflow outlet for discharging ore pulp, the inclined tank has a discharge outlet for discharging pebbles; the dualscrew device is arranged along the inclined tank, its lower end extends into the bottom tank, and the dual-screw device is used to drive pebbles towards the discharge outlet; the feed pipe and the flushing water pipe are arranged towards the dual-screw device; the lifting device is connected to the dual-screw device to drive a part or the entire dual-screw device to move upwards away from the inclined tank; the automatic control unit is used to control the lifting device to act according to the shutdown signal of the dual-screw device and to drive the flushing water pipe to clean the dual-screw device and the inclined tank.

2. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that it further includes a lower pivot seat, the lower pivot seat is arranged at the bottom of the bottom tank, the lower end of the dual-screw device is rotatably connected to the lower pivot seat, and the lifting device is connected to the upper end of the dual-screw device.

3. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that it further includes an upper pivot seat, the upper pivot seat is arranged at the upper end of the inclined tank, the upper end of the dual-screw device is rotatably connected to the upper pivot seat, and the lifting device is connected to the lower end of the dual-screw device.

4. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that the lifting device is connected to both the upper and lower ends of the dual-screw device to lift the entire dual-screw device.

5. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that the dual-screw device includes two screw shafts, a transmission mechanism, and a scrubbing drive mechanism, the two screw shafts are arranged side by side along the inclined tank with a gap therebetween, the scrubbing drive mechanism is connected to the two screw shafts through the transmission mechanism to drive the rotation of the two screw shafts; the scrubbing drive mechanism and the transmission mechanism are located at the upper end of the dualscrew device.

6. The dual-screw washing machine for laterite nickel ore as claimed in claim 5, characterized in that the dual-screw device further includes an upper mounting seat and a lower mounting seat, the upper mounting seat is fixedly connected to the scrubbing drive mechanism, the lower mounting seat is rotatably connected to the lower end of the screw shaft; the lifting device is connected to the upper mounting seat and / or the lower mounting seat .

7. The dual-screw washing machine for laterite nickel ore as claimed in claim 6, characterized in that the lifting device includes a plurality of hydraulic cylinders, the hydraulic cylinders are connected to the upper mounting seat and / or the lower mounting seat.

8. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that the lifting device includes a winch, a lifting drive mechanism, a plurality of guide pulleys, and a traction cable, one end of the traction cable is wound on the winch, the other end sequentially passes through the guide pulleys and is connected to the dual-screw device, the lifting drive mechanism is connected to the winch to drive the rotation of the winch.

9. The dual-screw washing machine for laterite nickel ore as claimed in claim 8, characterized in that the lifting device further includes a guide rail and a walking mechanism, the guiderail is arranged above the dual-screw device, the walking mechanism is arranged on the guide rail and can move along the guide rail, the winch, the lifting drive mechanism, and the guide pulleys are all arranged on the walking mechanism.

10. The dual-screw washing machine for laterite nickel ore as claimed in claim 1, characterized in that the automatic control unit further includes a switch module, a recognition module, and a control module, the switch module is electrically connected to the dual-screw device to control the start or shutdown of the dual-screw device, the recognition module is used to obtain the shutdown signal and start signal of the dual-screw device, the control module controls the lifting device to perform the first action according to the shutdown signal, and performs the second action after a set time, and simultaneously controls the flushing water pipe to perform the third action within the set time; the first action is the action of the lifting device driving the dual-screw device to lift from the initial position, the second action is the action of the lifting device driving the dualscrew device to descend a set distance, the third action is the action of the flushing water pipe flushing the dual-screw device and the inclined tank; the control module is also used to control the lifting device to perform the fourth action according to the start signal, the fourth action is the action of the lifting device driving the dual-screw device to descend to the initial position .

Images