A treatment system for removing iron, aluminum and chromium reactants from laterite nickel ore leachate

Abstract

The present invention relates to a laterite nickel ore leachate reaction product treatment system for removing iron, aluminum and chromium, which includes a reaction tank, a salvage component, a flushing component and a receiving box. The salvage component includes a rotating shaft, a net bag and a connecting rod. The rotating shaft is rotatably connected to the reaction tank, and the rotating shaft is connected to the net bag via the connecting rod. The net bag is open along its rotation direction and is concave in the opposite direction of its rotation to form a salvage cavity. The rotation path of the net bag covers and is arranged on the inner bottom wall of the reaction tank, and can be rotated to a first position and a second position. When the net bag is rotated to the first position, the opening of the net bag is tilted upward. When the net bag is rotated to the second position, the opening of the net bag is tilted downward. The flushing end of the flushing component is arranged opposite to the net bag in the first position, and the receiving box can slide to directly below the net bag in the second position. The system solves the problem that multiple thickeners arranged in sequence are currently needed for solid-liquid separation, the equipment is large in size and inconvenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of laterite nickel ore processing, in particular to a laterite nickel ore leaching solution iron, aluminum and chromium reaction product processing system. Background Art

[0002] Nickel and cobalt are used as raw materials in battery production. With the rapid development of the battery industry, demand for nickel and cobalt has increased dramatically. Currently, laterite nickel ore can be processed through a high-pressure acid leaching process to obtain nickel and cobalt raw materials. This process requires multiple stages of iron, aluminum, and chromium removal. The above reaction is a continuous process, which produces a slag phase containing iron, aluminum, and chromium.

[0003] In order to achieve the separation of the slag phase, a tailings solid-liquid separation equipment and method proposed in the invention patent with application number CN201310261041.1 can be used, which includes a high-frequency vibration slag screen, a rubber-lined wear-resistant slurry pump, a hydrocyclone, a high-frequency vibration dewatering screen, a high-efficiency inclined tube thickening box, a plunger pump and a box-type high-pressure filter press, wherein the underscreen material outlet of the high-frequency vibration slag screen is connected to the inlet of the rubber-lined wear-resistant slurry pump, the material inlet of the hydrocyclone is connected to the outlet of the rubber-lined wear-resistant slurry pump, the material inlet of the high-frequency vibration dewatering screen is connected to the sedimentation outlet of the hydrocyclone, and its underscreen material outlet is connected to the inlet of the rubber-lined wear-resistant slurry pump.

[0004] However, currently, multiple thickeners arranged in sequence are required for solid-liquid separation, which results in large equipment size and inconvenience in use. Summary of the Invention

[0005] In view of this, it is necessary to provide a laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system to solve the current problem of requiring multiple thickeners arranged in sequence for solid-liquid separation, which results in large equipment size and inconvenience in use.

[0006] The present invention provides a laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system, comprising a reaction tank, a salvage component, a flushing component and a receiving box, the salvage component comprising a rotating shaft, a net bag and a connecting rod, the rotating shaft being rotatably connected to the reaction tank, the rotating shaft being connected to the net bag via the connecting rod, the net bag being open along its rotation direction and concave in the opposite direction of its rotation to form a salvage cavity, the rotation path of the net bag covering the inner bottom wall of the reaction tank, and the net bag being rotatable to a first position above the liquid level in the reaction tank and a second position above the liquid level in the reaction tank. Second position, when the net bag is rotated to the first position, the opening of the net bag is tilted upward, and when the net bag is rotated to the second position, the opening of the net bag is tilted downward. The flushing component is connected to the reaction tank, and the flushing end of the flushing component is arranged facing the opening of the net bag located in the first position, so as to flush the net bag and the liquid phase adhered to the slag phase. The receiving box is slidably connected to the reaction tank, and the receiving box can slide to the bottom of the net bag located in the second position to receive the slag phase poured out of the net bag.

[0007] Furthermore, the width of the net bag is adapted to the width of the reaction tank, and there are multiple connecting rods, which are arranged in sequence along the axis direction of the rotating shaft.

[0008] Furthermore, the net bag is made of PTFE material, and a plurality of liquid-permeable holes are provided on a side of the net bag away from the opening.

[0009] Furthermore, the salvage assembly also includes a driving member, which is fixedly connected to the side wall of the reaction tank, and the output end of the driving member is connected to the rotating shaft to drive the rotating shaft to rotate.

[0010] Furthermore, the flushing assembly includes a drainage box, a flushing part and a collecting tube. The drainage box is arranged at a position above the liquid level in the reaction pool. The drainage box is slidably connected to the reaction pool in a direction close to or away from the first position. A cleaning port is provided on the side of the drainage box close to the first position. The drainage box can slide to the position where the net bag located at the first position is built into the drainage box. The flushing part is arranged on the inner top wall of the drainage box and is opposite to the opening of the net bag located at the first position. The collecting tube is communicated with the inner bottom of the drainage box.

[0011] Furthermore, the inner bottom wall of the receiving box is provided with a slope, and the slope is arranged to be inclined downward in a direction away from the cleaning port, and the collecting pipe is connected to the portion of the receiving box located below the slope.

[0012] Furthermore, the flushing part includes a flushing pump, a liquid inlet pipe, a liquid outlet pipe and multiple nozzles. The flushing pump is fixedly connected to the drainage box. One end of the flushing pump is connected to clean water via the liquid inlet pipe, and the other end of the flushing pump is connected to the multiple nozzles via the liquid outlet pipe. The multiple nozzles form the flushing end.

[0013] Furthermore, the plane where the multiple nozzles are located is arranged parallel to the plane where the opening of the net bag located at the first position is located, and the multiple nozzles are arranged in a matrix array on the plane where they are located.

[0014] Furthermore, the flushing assembly also includes a pushing member, which is fixedly connected to the side wall of the reaction tank, and the output end of the pushing member is connected to the drainage box to drive the drainage box to slide.

[0015] Furthermore, it also includes an insert plate, the bottom of the receiving box is provided with a discharge port connected to the interior thereof, the bottom of the receiving box is provided with a slot passing through the discharge port, and the insert plate is slidably connected to the slot to open or close the discharge port.

[0016] Compared with the prior art, the pre-dip liquid undergoes a continuous iron-aluminum-chromium removal reaction process in the reaction tank, and a slag phase containing iron, aluminum, and chromium is continuously precipitated from the pre-dip liquid. The rotation of the rotating shaft drives the net bag to rotate against the inner bottom wall of the reaction tank, thereby introducing the slag phase generated in the reaction tank into the salvage cavity through the opening. First, the net bag is rotated to the first position. At this time, the opening of the net bag is tilted upward. The liquid phase (including pre-dip liquid) adhering to the net bag and the slag phase can be washed down through the flushing end of the flushing component to avoid the liquid phase being discharged along with the slag phase, thereby wasting nickel, cobalt, and manganese contained in the liquid phase. Finally, the net bag is rotated to the second position. At this time, the opening of the net bag is tilted downward. The slag phase in the net bag falls into the receiving box under its own weight. Repeating the above steps can adapt to the solid-liquid separation work in the continuous iron-aluminum-chromium removal reaction process. The above-mentioned solid-liquid separation-related structures are built into the reaction tank, and no thickener is required, which reduces the equipment footprint and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a net bag salvaging the slag phase in the reaction tank in the laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system provided by an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a system for treating iron, aluminum, and chromium reactants in a laterite nickel ore leachate provided by an embodiment of the present invention, in which the net bag rotates to a first position;

[0019] Figure 3 This is a structural schematic diagram of the net bag rotating to the second position in the iron, aluminum and chromium reaction product treatment system for laterite nickel ore leachate provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-3 As shown, the present invention provides a laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system, including a reaction tank 100, a salvage component 200, a flushing component 300 and a receiving box 400, the salvage component 200 includes a rotating shaft 210, a net bag 220 and a connecting rod 230, the rotating shaft 210 is rotatably connected to the reaction tank 100, the rotating shaft 210 is connected to the net bag 220 via the connecting rod 230, the net bag 220 is open along its rotation direction and concave in the opposite direction of its rotation to form a salvage cavity, the rotation path of the net bag 220 covers the inner bottom wall of the reaction tank 100, and the net bag 220 can be rotated to a position located in the reaction tank 100. The first position and the second position are above the internal liquid level. When the net bag 220 rotates to the first position, the opening of the net bag 220 is tilted upward. When the net bag 220 rotates to the second position, the opening of the net bag 220 is tilted downward. The flushing component 300 is connected to the reaction tank 100. The flushing end of the flushing component 300 is facing the opening of the net bag 220 located at the first position to flush the net bag 220 and the liquid phase adhered to the slag phase. The receiving box 400 is slidably connected to the reaction tank 100. The receiving box 400 can slide to the bottom of the net bag 220 located at the second position to receive the slag phase poured out of the net bag 220.

[0022] During implementation, the pre-dip liquid undergoes a continuous iron-aluminum-chromium removal reaction process in the reaction tank 100, and a slag phase containing iron, aluminum, and chromium is continuously precipitated in the pre-dip liquid. The rotation of the rotating shaft 210 drives the net bag 220 to rotate against the inner bottom wall of the reaction tank 100, thereby introducing the slag phase generated in the reaction tank 100 into the salvage cavity through the opening. First, the net bag 220 is rotated to the first position. At this time, the opening of the net bag 220 is tilted upward, and the net bag 220 and the liquid phase adhering to the slag phase can be washed away by the flushing end of the flushing component 300. (including pre-soak liquid) is rinsed down to avoid the liquid phase being discharged along with the slag phase, so as to waste the nickel, cobalt and manganese contained in the liquid phase. Finally, the net bag 220 is rotated to the second position. At this time, the opening of the net bag 220 is tilted downward, and the slag phase in the net bag 220 falls into the receiving box 400 under its own weight. Repeating the above steps can adapt to the solid-liquid separation work in the continuous iron removal, aluminum and chromium removal reaction process. The above-mentioned solid-liquid separation-related structures are built into the reaction tank 100, and no thickener is required, which reduces the equipment footprint and is easy to use.

[0023] The reaction tank 100 in this embodiment provides support for a multi-stage iron, aluminum and chromium removal process for the pre-dip liquid formed by the high-pressure pre-dip treatment. Specifically, the pre-dip liquid is introduced into the reaction tank 100, and the pH value of the pre-dip liquid is adjusted to carry out the iron, aluminum and chromium removal process.

[0024] The salvage assembly 200 in this embodiment is a structure for salvaging the slag phase generated in the reaction tank 100. Specifically, the salvage assembly 200 includes a rotating shaft 210, a net bag 220, and a connecting rod 230. The rotating shaft 210 is rotatably connected to the reaction tank 100, and the rotating shaft 210 is connected to the net bag 220 via the connecting rod 230. The net bag 220 is open along its rotation direction and concave in the opposite direction of its rotation to form a salvage cavity. The rotation path of the net bag 220 covers the inner bottom wall of the reaction tank 100 and is arranged to rotate to a first position and a second position above the liquid level in the reaction tank 100. When the net bag 220 rotates to the first position, the opening of the net bag 220 is tilted upward, and when the net bag 220 rotates to the second position, the opening of the net bag 220 is tilted downward.

[0025] The rotating shaft 210 is disposed horizontally, thereby driving the net bag 220 to rotate circumferentially along the horizontal axis. Furthermore, to ensure that the fishing area of ​​the net bag 220 effectively covers the entire inner bottom of the reaction tank 100, the width of the net bag 220 is adapted to the width of the reaction tank 100. A plurality of connecting rods 230 are provided, and the connecting rods 230 are sequentially arranged along the axis of the rotating shaft 210.

[0026] In one embodiment, the inner bottom wall of the reaction tank 100 is in an arc shape that matches the rotation path of the net bag 220 .

[0027] Since the reaction tank 100 is a strongly acidic environment, in one embodiment, the net bag 220 is made of PTFE material. At the same time, a plurality of liquid-permeable holes are provided on the side of the net bag 220 away from the opening to facilitate the liquid phase in the net bag 220 to flow back into the reaction tank 100.

[0028] In order to facilitate the rotation of the net bag 220, in one embodiment, the salvage assembly 200 further includes a driving member fixedly connected to the side wall of the reaction tank 100. The output end of the driving member is connected to the rotating shaft 210 to drive the rotating shaft 210 to rotate. The driving member can be implemented by a motor and a reducer.

[0029] It can be understood that the above-mentioned net bag 220 and multiple connecting rods 230 can also serve as a stirring structure of the reaction tank 100. As the net bag 220 and multiple connecting rods 230 rotate, the pre-soak liquid in the reaction tank 100 and the subsequently added acid liquid are stirred to accelerate the reaction process of removing iron, aluminum and chromium.

[0030] The flushing assembly 300 in this embodiment is used to flush the slag phase salvaged from the net bag 220. This flushing removes the slag phase and any liquid phase adhering to the net bag 220, allowing it to be reintroduced into the reaction tank 100 or during the high-pressure pre-leaching process, thereby preventing loss of the liquid phase and the subsequent waste of the nickel, cobalt, and manganese raw materials contained therein. Specifically, the flushing assembly 300 is connected to the reaction tank 100, with the flushing end of the flushing assembly 300 positioned directly opposite the opening of the net bag 220 in the first position, thereby flushing the net bag 220 and any liquid phase adhering to the slag phase.

[0031] In one embodiment, the flushing assembly 300 includes a drainage box 310, a flushing piece 320 and a collection tube 330. The drainage box 310 is arranged above the liquid level in the reaction tank 100. The drainage box 310 is slidably connected to the reaction tank 100 in a direction close to or away from the first position. A cleaning port is provided on the side of the drainage box 310 close to the first position. The drainage box 310 can slide to the position where the net bag 220 located at the first position is built into the drainage box 310. The flushing piece 320 is arranged on the inner top wall of the drainage box 310 and is opposite to the opening of the net bag 220 located at the first position. The collection tube 330 is connected to the inner bottom of the drainage box 310.

[0032] In order to facilitate the collection of clean water for flushing and the liquid phase under flushing, in one embodiment, a slope 311 is provided on the inner bottom wall of the receiving box 400, and the slope 311 is inclined downward in the direction away from the cleaning port, and the collection pipe 330 is connected to the portion of the receiving box 400 located below the slope 311.

[0033] In one embodiment, the flushing component 320 includes a flushing pump 321, a liquid inlet pipe 322, a liquid outlet pipe 323 and a plurality of nozzles 324. The flushing pump 321 is fixedly connected to the drainage box 310. One end of the flushing pump 321 is connected to clean water via the liquid inlet pipe 322, and the other end of the flushing pump 321 is connected to the plurality of nozzles 324 via the liquid outlet pipe 323. The plurality of nozzles 324 form a flushing end.

[0034] In order to ensure that the clean water discharged from the multiple nozzles 324 effectively flushes the slag phase and the net bag 220, in one embodiment, the plane where the multiple nozzles 324 are located is arranged parallel to the plane where the opening of the net bag 220 located in the first position is located, and the multiple nozzles 324 are arranged in a matrix array in the plane where they are located.

[0035] In order to facilitate the sliding of the drainage box 310, the flushing assembly 300 also includes a pushing member 340, which is fixedly connected to the side wall of the reaction pool 100. The output end of the pushing member 340 is connected to the drainage box 310 to drive the drainage box 310 to slide.

[0036] It is understandable that the drainage box 310 can slide to a position that is offset from the rotation path of the net bag 220 so that it does not affect the rotation of the net bag 220.

[0037] In one embodiment, a limit block 312 is fixedly connected to the bottom of the drainage box 310 . When the drainage box 310 slides to the position where the flushing member 320 faces the net bag 220 in the first position, the limit block 312 abuts against the reaction tank 100 .

[0038] The receiving box 400 in this embodiment is a structure for receiving the slag phase in the net bag 220. The receiving box 400 is slidably connected to the reaction tank 100 and can slide to the bottom of the net bag 220 in the second position to receive the slag phase poured out of the net bag 220.

[0039] In order to facilitate the discharge of the slag phase in the receiving box 400, this embodiment also includes a plug plate 410. The bottom of the receiving box 400 is provided with a discharge port 420 connected to its interior. The bottom of the receiving box 400 is provided with a slot passing through the discharge port 420. The plug plate 410 is slidably connected to the slot to open or close the discharge port 420.

[0040] It is understandable that during the process of the net bag 220 rotating from the first position to the second position, the slag phase in the net bag 220 will not fall out due to inertia. The slag phase in the net bag 220 will fall out only when the net bag 220 stops at the second position.

[0041] It can be understood that the receiving box 400 can slide to a position that is offset from the rotation path of the net bag 220 so that it does not affect the rotation of the net bag 220. Specifically, the receiving box 400 can be rotated until the discharge port 420 is located outside the reaction tank 100, and a conveyor belt can be set at a position below the discharge port 420 to facilitate the reception and transportation of the slag phase discharged through the discharge port 420.

[0042] Compared with the prior art: the pre-dip liquid undergoes a continuous iron-aluminum-chromium removal reaction process in the reaction tank 100, and the slag phase containing iron, aluminum, and chromium is continuously precipitated in the pre-dip liquid. The rotation of the rotating shaft 210 drives the net bag 220 to rotate against the inner bottom wall of the reaction tank 100, thereby introducing the slag phase generated in the reaction tank 100 into the salvage cavity through the opening. First, the net bag 220 is rotated to the first position. At this time, the opening of the net bag 220 is tilted upward, and the net bag 220 and the slag phase adhered to the slag phase can be washed away by the flushing end of the flushing component 300. The liquid phase (including the pre-soak liquid) is washed down to prevent the liquid phase from being discharged along with the slag phase, so as to waste the nickel, cobalt and manganese contained in the liquid phase. Finally, the net bag 220 is rotated to the second position. At this time, the opening of the net bag 220 is tilted downward, and the slag phase in the net bag 220 falls into the receiving box 400 under its own weight. Repeating the above steps can adapt to the solid-liquid separation work in the continuous iron removal, aluminum and chromium reaction process. The above-mentioned solid-liquid separation-related structures are built into the reaction tank 100, and no thickener is required, which reduces the equipment footprint and is easy to use.

[0043] 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 thought of 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 leachate iron, aluminum and chromium reaction product treatment system, characterized in that: Including reaction tank, salvage components, flushing components and receiving box; The salvage assembly includes a rotating shaft, a net bag and a connecting rod, the rotating shaft is rotatably connected to the reaction tank, the rotating shaft is connected to the net bag via the connecting rod, the net bag is open along its rotation direction, and is concave in the opposite direction of its rotation to form a salvage cavity, the rotation path of the net bag covers and is arranged to be attached to the inner bottom wall of the reaction tank, and the net bag can be rotated to a first position and a second position located above the liquid level in the reaction tank, when the net bag is rotated to the first position, the opening of the net bag is tilted upward, and when the net bag is rotated to the second position, the opening of the net bag is tilted downward; The flushing component is connected to the reaction tank, and the flushing end of the flushing component is arranged facing the opening of the net bag located at the first position, so as to flush the net bag and the liquid phase adhering to the slag phase; The receiving box is slidably connected to the reaction tank, and the receiving box can slide to the position directly below the net bag located at the second position to receive the slag phase poured out of the net bag.

2. The laterite nickel ore leachate iron removal, aluminum and chromium reaction product treatment system according to claim 1, characterized in that: The width of the net bag is adapted to the width of the reaction pool. There are multiple connecting rods, and the multiple connecting rods are arranged in sequence along the axis direction of the rotating shaft.

3. The laterite nickel ore leachate iron removal, aluminum and chromium reaction product treatment system according to claim 1, characterized in that: The net bag is made of PTFE material, and a plurality of liquid-permeable holes are provided on a side of the net bag away from the opening.

4. The laterite nickel ore leachate iron removal, aluminum and chromium reaction product treatment system according to claim 1, characterized in that: The salvage assembly further includes a driving member fixedly connected to the side wall of the reaction tank, and an output end of the driving member is connected to the rotating shaft to drive the rotating shaft to rotate.

5. The laterite nickel ore leachate iron removal, aluminum and chromium reaction product treatment system according to claim 1, characterized in that: The flushing assembly includes a drainage box, a flushing piece and a collecting tube. The drainage box is arranged at a position above the liquid level in the reaction pool. The drainage box is slidably connected to the reaction pool in a direction close to or away from the first position. A cleaning port is provided on the side of the drainage box close to the first position. The drainage box can slide to the position where the net bag located at the first position is built into the drainage box. The flushing piece is arranged on the inner top wall of the drainage box and is opposite to the opening of the net bag located at the first position. The collecting tube is communicated with the inner bottom of the drainage box.

6. The laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system according to claim 5, characterized in that: The inner bottom wall of the receiving box is provided with a slope, and the slope is arranged to be inclined downward in a direction away from the cleaning port, and the collecting pipe is connected to the portion of the receiving box located below the slope.

7. The laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system according to claim 5, characterized in that: The flushing part includes a flushing pump, a liquid inlet pipe, a liquid outlet pipe and multiple nozzles. The flushing pump is fixedly connected to the drainage box. One end of the flushing pump is connected to clean water via the liquid inlet pipe, and the other end of the flushing pump is connected to the multiple nozzles via the liquid outlet pipe. The multiple nozzles form the flushing end.

8. The laterite nickel ore leachate iron removal, aluminum and chromium reaction product treatment system according to claim 7, characterized in that: The plane where the multiple nozzles are located is arranged parallel to the plane where the opening of the net bag located at the first position is located, and the multiple nozzles are arranged in a matrix array on the plane where they are located.

9. The laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system according to claim 5, characterized in that: The flushing assembly further includes a pushing member, which is fixedly connected to the side wall of the reaction tank. The output end of the pushing member is connected to the drainage box to drive the drainage box to slide.

10. The laterite nickel ore leachate iron, aluminum and chromium reaction product treatment system according to claim 1, characterized in that: It also includes an insert plate, the bottom of the receiving box is provided with a discharge port connected to the interior thereof, the bottom of the receiving box is provided with a slot passing through the discharge port, and the insert plate is slidably connected to the slot to open or close the discharge port.

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