Laterite-nickel ore double-helix ore washing system

Abstract

The invention relates to a laterite nickel ore double-screw ore washing system which comprises a double-screw ore washer, a movable screen and a conveying belt, the double-screw ore washer is provided with a slurry outlet, the feeding end of the movable screen is connected with the slurry outlet, the movable screen screens slurry guided out through the slurry outlet, and the conveying belt is arranged on the conveying belt. The movable screen can drive materials screened by the movable screen to move from the feeding end to the discharging end of the movable screen, and the conveying belt is arranged on the lower side of the discharging end of the movable screen. Mineral aggregate is guided into the double-screw ore washer, the double-screw ore washer scrubs the mineral aggregate, scrubbed ore pulp flows to the movable screen from the pulp outlet, the movable screen screens the ore pulp, scum in the ore pulp is intercepted, and the scum falls onto the conveying belt and is conveyed to a designated position through the conveying belt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laterite nickel ore processing, and particularly relates to a double-spiral ore washing system for laterite nickel ore. BACKGROUND

[0002] At present, in the hydrometallurgical process of laterite nickel ore, a cylindrical ore washing machine and a double-spiral ore washing machine are generally used to sequentially wash the laterite nickel ore, so as to sequentially screen out large gravel and small gravel in the laterite nickel ore, so as to facilitate the subsequent treatment of the ore slurry.

[0003] However, in addition to the gravel, the laterite nickel ore also contains wood-based, grass-based and other dregs. The existing cylindrical ore washing machine and double-spiral ore washing machine cannot screen out the above dregs, so that the dregs flow into the subsequent process along with the ore slurry, for example, the dregs easily block the cyclone and the spiral chute in the gravity separation treatment stage, thereby affecting the processing efficiency of the entire ore dressing.

[0004] CONTENT Therefore, it is necessary to provide a double-spiral ore washing system for laterite nickel ore, so as to solve the problem that the existing cylindrical ore washing machine and double-spiral ore washing machine cannot screen out the above dregs, interfere with the normal operation of the equipment, and thus affect the processing efficiency of the entire ore dressing.

[0005] The present application provides a double-spiral ore washing system for laterite nickel ore, which comprises a double-spiral ore washing machine, a movable screen and a conveyor belt. The double-spiral ore washing machine has a slurry outlet. The feed end of the movable screen is connected with the slurry outlet. The movable screen screens the slurry discharged through the slurry outlet, and the movable screen can drive the screened material to move from the feed end to the discharge end. The conveyor belt is arranged below the discharge end of the movable screen.

[0006] Further, the double-spiral ore washing machine comprises a pool body and two screws. A scrubbing groove extending along the length direction of the pool body is formed in the pool body. The scrubbing groove is arranged obliquely along the length direction, and the bottom of the pool body is provided with the slurry outlet for the overflow of the slurry in the pool body. The two screws are arranged parallel to the scrubbing groove and are built in the scrubbing groove. The two screws are rotationally connected with the pool body to scrub the solid medium in the slurry in the pool body.

[0007] Further, the movable screen comprises a vibrating frame, a plate-shaped screen, an elastic member and a vibrating motor. The vibrating frame is connected with the double-spiral ore washing machine through the elastic member, and the slurry outlet is located above the vibrating frame. The plate-shaped screen is installed on the vibrating frame. The vibrating frame is arranged obliquely downward along the direction away from the slurry outlet and extends to the position above the conveyor belt.

[0008] Further, the elastic member further comprises two connecting rods arranged in parallel, a plurality of limiting rods and a plurality of connecting blocks, the two connecting rods are fixedly connected with the double helix washing machine, the top ends of the plurality of limiting rods are respectively connected with the two connecting rods, the bottom ends of the plurality of limiting rods are respectively and slidably connected with the plurality of connecting blocks in the vertical direction, the plurality of connecting blocks are fixedly connected with the vibrating frame, the plurality of springs are respectively sleeved on the plurality of limiting rods, and the two ends of the plurality of springs are respectively abutted with the connecting rods and the connecting blocks.

[0009] Further, the movable screen comprises a screen cylinder, a cylindrical screen mesh and a rotating member, the cylindrical screen mesh is coaxially arranged in the screen cylinder and is rotationally connected with the screen cylinder through the rotating member, the slurry outlet extends into the cylindrical screen mesh, and the cylindrical screen mesh is arranged downwardly and inclined away from the slurry outlet.

[0010] Further, the bottom of the screen cylinder is provided with a first discharge port and a second discharge port, the first discharge port is located below the cylindrical screen mesh, and the second discharge port is located on the side of the cylindrical screen mesh away from the slurry outlet, a tapered inner bottom wall gradually expanding upwardly is formed on the inner bottom wall of the screen cylinder, and the first discharge port is arranged at the tip of the tapered inner bottom wall.

[0011] Further, the rotating member comprises four bearing seats, two rotating shafts and four rollers, the two rotating shafts are arranged in parallel on the two sides of the cylindrical screen mesh, the two ends of each rotating shaft are connected with the inner wall of the screen cylinder through the bearing seat, two rollers are connected with each rotating shaft, the four rollers are abutted with the outer wall of the cylindrical screen mesh, the two rotating shafts rotate in the same direction, and the cylindrical screen mesh is driven to rotate through the friction force between the rollers and the cylindrical screen mesh.

[0012] Further, four limiting rings are sleeved on the cylindrical screen mesh, and the two sides of each roller are abutted with the limiting rings.

[0013] Further, the double helix washing machine and the movable screen are a plurality of and one-to-one corresponding, and the plurality of double helix washing machines are arranged in sequence along the length direction of the conveying belt.

[0014] Further, the discharge assembly for receiving the slurry screened through the movable screen is further provided, and the feeding end of the discharge assembly is arranged at the bottom of the movable screen.

[0015] Compared with the prior art, the mineral material is introduced into the double helix washing machine, the double helix washing machine rubs and washes the mineral material, the washed slurry flows to the movable screen from the slurry outlet, the movable screen screens the slurry, intercepts the scum in the slurry and makes the scum fall on the conveying belt and be conveyed to the designated position. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A top view schematic diagram of the overall red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. Figure 2 A mounting schematic diagram of the vibrating screen in the red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. Figure 3 A structure schematic diagram of the vibrating screen in the red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. Figure 4 A mounting schematic diagram of the cylindrical screen in the red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. Figure 5 A structure schematic diagram of the cylindrical screen in the red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. Figure 6 A structure schematic diagram of the red soil nickel ore double spiral washing system provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, which form a part of this application. The accompanying drawings, together with the implementation examples of the present application, serve to explain the principles of the present application, but are not intended to limit the scope of the present application.

[0018] Since there are wood-based and grass-based impurities in the red soil nickel ore, the above impurities form dregs in the ore slurry during the washing process, which will affect the normal operation of the equipment in the subsequent process if not treated. Therefore, the present application improves the washing system to remove the dregs in the ore slurry.

[0019] As shown in Figure 1 and Figure 6 , the present application provides a red soil nickel ore double spiral washing system, which comprises a double spiral washing machine, a movable screen 300, and a conveyor belt 400. The double spiral washing machine has a slurry outlet 110. The feed end of the movable screen 300 is connected to the slurry outlet 110. The movable screen 300 screens the slurry discharged through the slurry outlet 110, and the movable screen 300 can drive the material screened by it to move from its feed end to its discharge end. The conveyor belt 400 is arranged below the discharge end of the movable screen 300.

[0020] In implementation, the ore material is introduced into the double spiral washing machine, which rubs and washes the ore material. The washed ore slurry flows from the slurry outlet 110 to the movable screen 300, which screens the ore slurry, intercepts the dregs in the ore slurry, and makes it fall onto the conveyor belt, which is transported to a designated location by the conveyor belt 400.

[0021] The double-screw washer in the embodiment comprises a tank body 100 and two screws 200, the tank body 100 is formed with a scrubbing groove extending along the length direction thereof, the scrubbing groove is arranged in an inclined manner along the length direction thereof, the bottom of the tank body 100 is provided with a slurry outlet 110 for the overflow of the slurry in the tank body 100, the two screws 200 are both arranged in parallel to the scrubbing groove and are both arranged in the scrubbing groove, and the two screws 200 are rotationally connected with the tank body 100 to scrub the solid medium in the slurry in the tank body 100.

[0022] It can be understood that the slurry introduced into the double-screw washer contains the ore slurry, gravel and other solid medium and scum, and the gravel is carried along. In the process of scrubbing, the gravel and other solid medium moves in the direction of upward inclination under the conveying of the screws 200 until it is discharged onto the gravel conveying belt, the scrubbed ore slurry is discharged from the slurry outlet 110, and finally, the movable screen 300 screens and intercepts the material in the ore slurry, i.e. the scum.

[0023] In an embodiment, in order to facilitate the introduction of the ore slurry to be scrubbed into the scrubbing groove, a liquid inlet end 120 is further included, the liquid inlet end 120 extends to the position above the scrubbing groove, and the liquid inlet end 120 can adopt a pipeline or other structure to realize the conveying of the ore slurry, and the shape of the slurry outlet 110 in the embodiment can be a frame shape or a circular shape, and the shape of the slurry outlet 110 is not limited.

[0024] In order to facilitate the rotation of the two screws 200, a driving member 210 can be configured to drive the rotation of the two screws 200. In an embodiment, the driving member 210 comprises a rotary motor 211, two first gears 212, two transmission shafts 213 and two second gears 214, the rotary motor 211 is fixedly connected with the side wall of the tank body 100, the output end of the rotary motor 211 is connected with one of the screws 200, the two first gears 212 are respectively sleeved on the two screws 200, the two transmission shafts 213 are both rotationally connected with the tank body 100, the two second gears 214 are respectively sleeved on the two transmission shafts 213, and the opposite sides of the two second gears 214 are meshingly connected, and the opposite sides of the two second gears 214 are respectively meshingly connected with the two first gears 212.

[0025] Of course, the driving member 210 can also adopt a double-motor mode to drive the synchronous rotation of the two screws 200, and the application does not limit this.

[0026] The movable screen 300 in the embodiment is arranged in an inclined manner at the slurry outlet 110 of the tank body 100 to receive the slurry discharged through the slurry outlet 110, and the movable screen 300 screens the scum in the slurry through its action. With the action of the movable screen 300, the intercepted scum thereon gradually falls onto the conveying belt 400 along the inclined direction of the movable screen 300.

[0027] The actions of the movable screen 300 include vibration, rotation, and shaking, which will be described in detail below with reference to specific embodiments.

[0028] Example 1: like Figure 2 As shown, the movable screen 300 in this embodiment is a vibrating screen 310 , which vibrates to screen scum in the slurry.

[0029] like Figure 3 As shown, the vibrating screen 310 includes a vibrating frame 311, a plate-shaped screen 312, an elastic member 313 and a vibrating motor 314. The vibrating frame 311 is connected to the bottom of the pool body 100 via the elastic member 313, and the slurry outlet 110 is located above the vibrating frame 311. The plate-shaped screen 312 is installed on the vibrating frame 311. The vibrating frame 311 is inclined downward in a direction away from the slurry outlet 110 and extends to a position above the conveyor belt 400.

[0030] In one embodiment, the elastic member 313 includes a plurality of springs 313a, and the vibration frame 311 is connected to the pool body 100 via the plurality of springs 313a. When the vibration motor 314 is turned on, the plate-shaped screen 312 connected to the vibration frame 311 vibrates through the compression and extension of the springs 313a.

[0031] To ensure stable vibration, the elastic member 313 also includes two connecting rods 313b, a plurality of limiting rods 313c and a plurality of connecting blocks 313d arranged in parallel. The two connecting rods 313b are fixedly connected to the pool body 100, and the top ends of the plurality of limiting rods 313c are respectively connected to the two connecting rods 313b, and the bottom ends of the plurality of limiting rods 313c are respectively slidably connected to the plurality of connecting blocks 313d in the vertical direction. The plurality of connecting blocks 313d are all fixedly connected to the vibration frame 311, and the plurality of springs 313a are respectively mounted on the plurality of limiting rods 313c, and the two ends of the plurality of springs 313a are respectively in contact with the connecting rods 313b and the connecting blocks 313d.

[0032] Example 2: like Figure 4 As shown, the movable screen 300 in this embodiment is a cylindrical screen 320, which is rotated to screen scum in the slurry.

[0033] like Figure 5 As shown, in one embodiment, the cylindrical screen 320 includes a screen drum 321, a cylindrical screen 322 and a rotating member 323. The cylindrical screen 322 is coaxially built into the screen drum 321 and is rotatably connected to the screen drum 321 via the rotating member 323. The slurry outlet 110 extends into the cylindrical screen 322, and the cylindrical screen 322 is arranged to be inclined downward in a direction away from the slurry outlet 110.

[0034] The bottom of the screen cylinder 321 is provided with a first discharge port 321a and a second discharge port 321b. The first discharge port 321a is located below the cylindrical screen 322, and the second discharge port 321b is located on the side of the cylindrical screen 322 away from the slurry outlet 110. The inner bottom wall of the screen cylinder 321 is formed with a tapered inner bottom wall 321c that gradually expands upward. The first discharge port 321a is arranged at the tip of the tapered inner bottom wall 321c.

[0035] In one embodiment, the rotating member 323 includes four bearing seats 323a, two rotating shafts 323b, and four rollers 323c. The two rotating shafts 323b are arranged in parallel on both sides of the cylindrical screen 322. The two ends of each rotating shaft 323b are connected to the inner wall of the screen cylinder 321 via the bearing seat 323a. Two rollers 323c are connected to each rotating shaft 323b. The four rollers 323c are in contact with the outer wall of the cylindrical screen 322. The two rotating shafts 323b rotate in the same direction, and the friction between the rollers 323c and the cylindrical screen 322 drives the cylindrical screen 322 to rotate.

[0036] To prevent the cylindrical screen 322 from sliding in the axial direction, the embodiment further includes four limiting rings 322a that are sleeved on the cylindrical screen 322. The two sides of each roller 323c are in contact with the limiting rings 322a. It should be noted that a motor can be used to drive the rotating shaft 323b to rotate.

[0037] Embodiment 3: Based on Embodiment 2, the rollers 323c are eccentric wheels. With the rotation of the eccentric wheels, the cylindrical screen 322 not only rotates but also shakes.

[0038] The conveyor belt 400 in the present embodiment is used to transport the dross screened out.

[0039] As shown in Figure 6 Generally, multiple double-spiral washing machines are arranged side by side in a factory building. Therefore, the conveyor belt 400 can cooperate with multiple double-spiral washing machines arranged side by side. Specifically, the double-spiral washing machines and the movable screens 300 are both multiple and correspond one by one. The multiple double-spiral washing machines are arranged in sequence along the length direction of the conveyor belt 400. A single conveyor belt can handle the dross transported by multiple movable screens, effectively reducing labor costs.

[0040] The present embodiment further includes a discharge assembly 500 for receiving the slurry screened out by the movable screen 300.

[0041] In one embodiment, the discharge assembly 500 includes a discharge pipe 510. However, due to the action of the movable screen 300, the ore slurry cannot be effectively introduced into the discharge pipe 510, so a transfer box 520 can also be provided, which is arranged at the bottom of the movable screen 300, and the top end of the discharge pipe 510 is in communication with the transfer box 520, thereby solving the above problem.

[0042] Compared with the prior art, the ore material is introduced into the double-spiral washing machine, the double-spiral washing machine performs scrubbing on the ore material, the scrubbed ore slurry flows from the slurry outlet 110 to the movable screen 300, the movable screen 300 performs screening on the ore slurry, intercepts the dross in the ore slurry, and makes it fall onto the conveyor belt, which is transported to the designated position through the conveyor belt 400.

[0043] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A double screw washing system for laterite nickel ore, characterized by, The utility model relates to a double-screw washing machine, which comprises: a double-screw washing machine having a slurry outlet; a movable screen having a feed end connected to the slurry outlet, the movable screen screening the slurry discharged through the slurry outlet, and the movable screen being capable of driving the screened material to move from the feed end to the discharge end of the movable screen; a conveyor belt arranged below the discharge end of the movable screen.

2. The laterite nickel ore double screw washing system according to claim 1, characterized in that, The double-screw washing machine comprises a tank body and two screws, the tank body is provided with a scrubbing groove extending along the length direction of the tank body, the scrubbing groove is arranged obliquely along the length direction of the tank body, and the bottom of the tank body is provided with the slurry outlet for the overflow of the slurry in the tank body, the two screws are arranged parallel to the scrubbing groove and are arranged in the scrubbing groove, and the two screws are rotatably connected to the tank body to scrub the solid medium in the slurry in the tank body.

3. The laterite nickel ore double screw washing system according to claim 1, characterized in that, The movable screen comprises a vibrating frame, a plate-shaped screen, an elastic member, and a vibrating motor, the vibrating frame is connected to the double-screw washing machine through the elastic member, the slurry outlet is located above the vibrating frame, the plate-shaped screen is installed on the vibrating frame, and the vibrating frame is arranged obliquely downward along the direction away from the slurry outlet and extends to the position above the conveyor belt.

4. The nickel laterite double helix washing system of claim 3, wherein, The elastic member further comprises two connecting rods arranged in parallel, a plurality of limiting rods, and a plurality of connecting blocks, the two connecting rods are fixedly connected to the double-screw washing machine, the top ends of the plurality of limiting rods are connected to the two connecting rods respectively, the bottom ends of the plurality of limiting rods are connected to the plurality of connecting blocks in the vertical direction respectively, the plurality of connecting blocks are fixedly connected to the vibrating frame, the plurality of springs are sleeved on the plurality of limiting rods respectively, and the two ends of the plurality of springs are abutted to the connecting rods and the connecting blocks respectively.

5. The laterite nickel ore double screw washing system according to claim 1, characterized in that, The movable screen comprises a screen cylinder, a cylindrical screen, and a rotating member, the cylindrical screen is coaxially arranged in the screen cylinder and is rotatably connected to the screen cylinder through the rotating member, the slurry outlet extends into the cylindrical screen, and the cylindrical screen is arranged obliquely downward along the direction away from the slurry outlet.

6. The nickel laterite double helix washing system of claim 5, wherein, The bottom of the screen cylinder is provided with a first discharge port and a second discharge port, the first discharge port is located below the cylindrical screen, the second discharge port is located on the side of the cylindrical screen away from the slurry outlet, the inner bottom wall of the screen cylinder is formed with a tapered inner bottom wall gradually expanding in the vertical upward direction, and the first discharge port is arranged at the tip of the tapered inner bottom wall.

7. The laterite nickel ore double screw washing system according to claim 5, characterized in that, The rotating member comprises four bearing seats, two rotating shafts, and four rollers, the two rotating shafts are arranged in parallel on the two sides of the cylindrical screen, the two ends of each rotating shaft are connected to the inner wall of the screen cylinder through the bearing seat, two rollers are connected to each rotating shaft, the four rollers are abutted to the outer wall of the cylindrical screen, and the two rotating shafts rotate in the same direction to drive the cylindrical screen to rotate through the friction force between the rollers and the cylindrical screen.

8. The laterite nickel ore double screw washing system according to claim 7, characterized in that, The utility model further comprises four limiting stop rings sleeved on the cylindrical screen, and the two sides of each roller are abutted to the limiting stop rings.

9. The laterite nickel ore double helix washing system according to claim 1, characterized in that, The double-spiral washing machines and the movable screens are arranged one by one in a one-to-one correspondence, and the double-spiral washing machines are arranged in sequence along the length direction of the conveying belt.

10. The laterite nickel ore double screw washing system according to claim 1, characterized in that, The application also comprises a discharge assembly for receiving the slurry screened by the movable screen, and the feeding end of the discharge assembly is arranged at the bottom of the movable screen.

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