Lateritic nickel ore pulp thickener

Abstract

Disclosed in the present invention is a lateritic nickel ore pulp thickener, comprising a thickener body and a material pressing mechanism. The thickener body has a tapered accommodating cavity. The material pressing mechanism comprises a lifting / lowering plate, a plurality of vertical plates, a plurality of sieve plates, a lifting / lowering driving member, and a posture adjusting assembly. The lifting / lowering plate is arranged in the accommodating cavity. The vertical plates are all fixed under the lifting / lowering plate. Sieve holes are uniformly and densely formed in the sieve plates. The posture adjusting assembly is connected to the sieve plates and used for driving the sieve plates to rotate. The beneficial effects of the present invention are: the posture adjusting assembly drives the sieve plates to rotate until the sieve plates are perpendicular to the vertical plates, and the lifting / lowering driving member drives the lifting / lowering plate to descend; and at this time, the sieve plates move downwards, particles in ore pulp with a particle size smaller than the size of the sieve holes can directly pass through the sieve plates, while particles in the ore pulp with a particle size greater than the size of the sieve holes are intercepted by the sieve plates and move downwards along with the sieve plates, so that settling of the particles in the ore pulp can be accelerated, and the concentration rate of the ore pulp is increased.

Description

A laterite nickel ore slurry thickener Technical Field

[0001] The present invention relates to the technical field of mineral development, 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] The thickener used in the hydrometallurgy of laterite nickel ore only concentrates the slurry by gravity, which usually takes a long time and has a low concentration efficiency.

[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 existing thickener only concentrates the slurry by gravity, has a long concentration time and low concentration efficiency.

[0006] In order to achieve the above object, the present invention provides a thickener, characterized in that it includes a thickener body and a material pressing mechanism;

[0007] The thickener body has a conical accommodating cavity for introducing slurry, a discharge port is provided at the bottom end of the thickener body, and an overflow port is provided at the top end of the thickener body;

[0008] The pressing mechanism includes a lifting plate, several vertical plates, several sieve plates, a lifting drive and a posture adjustment component. The lifting plate is arranged in the accommodating cavity, and each of the vertical plates is fixed below the lifting plate. The sieve plates are evenly and densely provided with sieve holes, and each sieve plate is hinged one by one to the bottom of the vertical plate. The lifting drive is used to drive the lifting plate to lift and lower. The posture adjustment component is connected to each of the sieve plates and is used to drive the sieve plates to rotate. When the lifting plate descends, the posture adjustment component drives each of the sieve plates to rotate to be perpendicular to the vertical plates. When the lifting plate rises, the posture adjustment component drives each of the sieve plates to rotate to be parallel to the vertical plates.

[0009] In some embodiments, the thickener body has a top cover; the thickener also includes a stirring mechanism, 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, the stirring motor is installed on the top cover, the stirring motor is connected to the stirring shaft and is used to drive the stirring shaft to rotate, and a clearance hole for the stirring shaft to pass through is opened on the lifting plate.

[0010] In some embodiments, a guide hole is provided on the top cover; the pressing mechanism also includes a guide rod and a top plate, the guide rod is slidably inserted into the guide hole, the lower end of the guide rod is fixedly connected to the lifting plate, and the upper end of the guide rod is fixedly connected to the top plate.

[0011] In some embodiments, a screw hole is provided on the top plate; the lifting drive member includes a bracket, a screw rod and a first rotating drive member, the bracket is fixed above the top cover, the two ends of the screw rod are respectively rotatably connected to the bracket and the top cover, the screw rod is threadedly inserted into the screw hole, and the first rotating drive member is connected to the screw rod and is used to drive the screw rod to rotate.

[0012] In some embodiments, the first rotation driving member includes a rotation driving motor, a driving gear and a driven gear, the rotation driving motor is installed on the bracket, the output shaft of the rotation driving motor is fixedly connected to the driving gear, the driven gear is fixedly sleeved on the screw rod, and the driven gear is engaged with the driving gear.

[0013] In some embodiments, the lifting drive member further includes a nut, which is fixed to the top plate and coaxial with the screw hole, and the screw rod is threadedly inserted into the nut.

[0014] In some embodiments, a stop block is formed on the vertical plate. When the sieve plate is perpendicular to the corresponding vertical plate, the upper end surface of the sieve plate abuts against the lower end surface of the stop block, thereby preventing the sieve plate from continuing to rotate upward; the posture adjustment assembly includes a number of pull ropes, a fixed frame, a winding wheel and a second rotating drive member. One end of each of the pull ropes is fixedly connected to the corresponding sieve plate, and the other end of each of the pull ropes is wound around the winding wheel. The fixed frame is fixed to the top plate, and the winding wheel is rotatably arranged on the fixed frame. The second rotating drive member is connected to the winding wheel and is used to drive the winding wheel to rotate.

[0015] In some embodiments, a rotating shaft is rotatably connected to the fixed frame, and the winding wheel is fixed to the rotating shaft; the second rotating driving component includes a winding motor, a driving sprocket, a driven sprocket and a synchronous belt, the winding motor is installed on the top plate, the output shaft of the winding motor is fixedly connected to the driving sprocket, the driven sprocket is fixedly sleeved on the rotating shaft, and the two ends of the synchronous belt are respectively wound around the driven sprocket and the driving sprocket.

[0016] In some embodiments, a plurality of guide wheels are rotatably provided on the lifting plate, and each of the pull ropes is wound around the guide wheel.

[0017] In some embodiments, the posture adjustment assembly further includes a plurality of reset elastic members, one end of each reset elastic member is fixed to the corresponding vertical plate, and the other end of each reset elastic member is fixed to the corresponding screen plate.

[0018] The sieve plates are driven by the lifting mechanism to move downward, and the particles with a particle size smaller than the sieve holes can pass through the sieve plates directly, while the particles with a particle size larger than the sieve holes are intercepted by the sieve plates and move downward with the sieve plates, thereby accelerating the sinking of particles in the slurry and improving the slurry concentration rate. When the lifting plate is lowered to the set position, the sieve plates are driven by the lifting mechanism to rotate to be parallel to the vertical plates, and the lifting plate is driven up by the lifting mechanism. At this time, each sieve plate moves upward. Since each sieve plate is in contact with the corresponding vertical plates, it will not drive the mineral particles to rise. When the lifting plate rises to the set position, it descends according to the above steps, and repeats this cycle, continuously pushing the mineral particles downward, thereby greatly accelerating the concentration process of the slurry and improving the concentration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of an embodiment of a laterite nickel ore slurry thickener provided by the present invention;

[0020] FIG2 is a schematic structural diagram of the laterite nickel ore slurry thickener in FIG1 with the support omitted;

[0021] FIG3 is a schematic structural diagram of the laterite nickel ore slurry thickener in FIG2 with the stirring mechanism omitted (the sieve plate is in a horizontal state);

[0022] FIG4 is a schematic diagram of the three-dimensional structure of the pressing mechanism in FIG3 (omitting the lifting drive member);

[0023] FIG5 is a schematic structural diagram of the laterite nickel ore slurry thickener in FIG3 (the sieve plate is in a vertical state);

[0024] FIG6 is a partial enlarged view of area A in FIG3 ;

[0025] FIG7 is a schematic structural diagram of the lifting drive member and the posture adjustment assembly in FIG3;

[0026] In the figure: 1-thickener body, 11-discharge port, 12-overflow port, 13-top cover, 14-support, 15-feed pipe, 2-pressing mechanism, 21-lifting plate, 211-clearance hole, 22-vertical plate, 221-stopper, 23-sieve plate, 24-lifting drive member, 241-bracket, 242-screw, 243-first rotating drive member, 2431-rotating drive motor, 2432-driving gear, 2433- Driven gear, 244-nut, 25-posture adjustment assembly, 251-pull rope, 252-fixed frame, 253-rewinding wheel, 254-second rotating drive member, 2541-rewinding motor, 2542-driving sprocket, 2543-driven sprocket, 2544-synchronous belt, 255-rotating shaft, 256-guide wheel, 257-resetting elastic member, 26-guide rod, 27-top plate, 271-screw hole, 3-stirring mechanism, 31-stirring shaft, 32-stirring blade, 33-stirring motor. DETAILED DESCRIPTION

[0027] 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.

[0028] 1 to 7 , the present invention provides a laterite nickel ore slurry thickener, comprising a thickener body 1 and a pressing mechanism 2;

[0029] The thickener body 1 has a conical accommodating cavity for introducing slurry. A discharge port 11 is provided at the bottom end of the thickener body 1, and an overflow port 12 is provided at the top end of the thickener body 1.

[0030] The pressing mechanism 2 includes a lifting plate 21, several vertical plates 22, several sieve plates 23, a lifting drive member 24 and a posture adjustment component 25. The lifting plate 21 is arranged in the accommodating cavity, and each of the vertical plates 22 is fixed below the lifting plate 21. The sieve plates 23 are evenly and densely provided with sieve holes. Each sieve plate 23 is hinged to the bottom of the vertical plate 22 one by one. The lifting drive member 24 is used to drive the lifting plate 21 to rise and fall. The posture adjustment component 25 is connected to each of the sieve plates 23 and is used to drive the sieve plates 23 to rotate. When the lifting plate 21 descends, the posture adjustment component 25 drives each of the sieve plates 23 to rotate to be perpendicular to the vertical plate 22. When the lifting plate 21 rises, the posture adjustment component 25 drives each of the sieve plates 23 to rotate to be parallel to the vertical plate 22.

[0031] During use, the 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 supernatant (i.e., slurry with very low concentration). The supernatant is discharged from the overflow port 12. In order to accelerate the concentration of the slurry, the posture adjustment component 25 drives each of the sieve plates 23 to rotate to be perpendicular to the vertical plate 22 (as shown in Figures 3 and 4), and the lifting plate 21 is driven down by the lifting drive member 24. At this time, each sieve plate 23 moves downward, and particles in the slurry with a particle size smaller than the sieve hole can directly pass through the sieve plate 23, while particles in the slurry with a particle size larger than the sieve hole are intercepted by the sieve plate 23 and move downward with the sieve plate 23, thereby To accelerate the sinking of particles in the slurry and improve the slurry concentration rate, when the lifting plate 21 descends to the set position, the posture adjustment component 25 drives each of the sieve plates 23 to rotate parallel to the vertical plate 22 (as shown in Figure 5), and the lifting plate 21 is driven to rise by the lifting drive 24. At this time, each sieve plate 23 moves upward. Since each sieve plate 23 is fitted with the corresponding vertical plate 22, a large gap will be exposed between the sieve plates 23. The sieve plates 23 will not intercept mineral particles when moving upward, and therefore will not drive the mineral particles to rise. After the lifting plate 21 rises to the set position, it will descend according to the above steps, and this cycle will be repeated to continuously push the mineral particles downward, thereby greatly accelerating the concentration process of the slurry and improving the concentration efficiency.

[0032] To improve the thickening efficiency, referring to Figures 1 to 4, in a preferred embodiment, the thickener body 1 has a top cover 13; the thickener also includes a stirring mechanism 3, which includes a stirring shaft 31, stirring blades 32, and a stirring motor 33. The stirring shaft 31 is rotatably disposed within the thickener body 1, the stirring blades 32 are fixed to the stirring shaft 31, and the stirring motor 33 is mounted on the top cover 13. The stirring motor 33 is connected to the stirring shaft 31 and is used to drive the stirring shaft 31 to rotate. The lifting plate 21 is provided with a clearance hole 211 for the stirring shaft 31 to pass through. During use, the provision of the stirring mechanism 3 can improve the uniformity of the slurry at different locations and prevent uneven accumulation of the slurry, which would result in poor thickening effect.

[0033] In order to improve the stability of the lifting plate 21 during its up and down movement, please refer to Figures 1 to 4. In a preferred embodiment, a guide hole is provided on the top cover 13; the pressing mechanism 2 also includes a guide rod 26 and a top plate 27. The guide rod 26 is slidably inserted into the guide hole, and the lower end of the guide rod 26 is fixedly connected to the lifting plate 21, and the upper end of the guide rod 26 is fixedly connected to the top plate 27.

[0034] In order to specifically implement the function of the lifting drive member 24, please refer to Figures 2 to 4. In a preferred embodiment, a screw hole 271 is opened on the top plate 27; the lifting drive member 24 includes a bracket 241, a screw rod 242 and a first rotation drive member 243. The bracket 241 is fixed on the top of the top cover 13. The two ends of the screw rod 241 are respectively rotatably connected to the bracket 241 and the top cover 13. The screw rod 241 is threadedly inserted into the screw hole 271. The first rotation drive member 243 is connected to the screw rod 242 and is used to drive the screw rod 242 to rotate. When the screw rod 242 rotates, it acts on the top plate 27. Since the top plate 27 cannot rotate, the rotation of the screw rod 242 is converted into the up and down movement of the top plate 27. The top plate 27 drives the lifting plate 21 to move up and down via the guide rod 26.

[0035] In order to specifically realize the function of the first rotating driving member 243, please refer to Figures 2, 3 and 7. In a preferred embodiment, the first rotating driving member 243 includes a rotating driving motor 2431, a driving gear 2432 and a driven gear 2433. The rotating driving motor 2431 is installed on the bracket 241, and the output shaft of the rotating driving motor 2431 is fixedly connected to the driving gear 2432. The driven gear 2433 is fixedly sleeved on the screw rod 242, and the driven gear 2433 is engaged with the driving gear 2432.

[0036] In order to improve the thread engagement force, please refer to Figures 2, 3 and 7. In a preferred embodiment, the lifting drive member 24 also includes a nut 244, which is fixed to the top plate 27 and coaxial with the screw hole 271, and the screw rod 242 is threadedly inserted into the nut 244.

[0037] In order to specifically realize the function of the posture adjustment component 25, please refer to Figures 3 to 7. In a preferred embodiment, a stopper 221 is formed on the vertical plate 22. When the sieve plate 23 is perpendicular to the corresponding vertical plate 22, the upper end surface of the sieve plate 23 abuts against the lower end surface of the stopper 221, thereby preventing the sieve plate 23 from continuing to rotate upward; the posture adjustment component 25 includes a plurality of pull ropes 251, a fixing frame 252, a winding wheel 253 and a second rotating drive member 254. Each of the pull ropes 25 1 is fixedly connected to the corresponding sieve plate 23, and the other end of each pull rope 251 is wound around the reel 253. The fixing frame 252 is fixed on the top plate 27, and the reel 253 is rotatably set on the fixing frame 252. The second rotating drive member 254 is connected to the reel 253 and is used to drive the reel 253 to rotate. When the reel 253 rotates, each pull rope 251 is reeled in, thereby driving each sieve plate 23 to rotate upward to a horizontal state.

[0038] In order to specifically realize the function of the second rotating driving member 254, please refer to Figures 3 to 7. In a preferred embodiment, a rotating shaft 255 is rotatably connected to the fixed frame 252, and the winding wheel 253 is fixed to the rotating shaft 255; the second rotating driving member 254 includes a winding motor 2541, a driving sprocket 2542, a driven sprocket 2543 and a synchronous belt 2544, the winding motor 2541 is installed on the top plate 27, the output shaft of the winding motor 2541 is fixedly connected to the driving sprocket 2542, the driven sprocket 2543 is fixedly sleeved on the rotating shaft 255, and the two ends of the synchronous belt 2544 are respectively wound around the driven sprocket 2543 and the driving sprocket 2542.

[0039] In order to guide the pull rope 251 , please refer to FIG. 3 to FIG. 7 . In a preferred embodiment, a plurality of guide wheels 256 are rotatably provided on the lifting plate 21 , and each of the pull ropes 251 is wound around the guide wheel 256 .

[0040] In order to facilitate the rotation of the sieve plate 23 to fit together with the vertical plate 22, the posture adjustment assembly 25 also includes a number of reset elastic members 257, one end of the reset elastic member 257 is fixed to the corresponding vertical plate 22, and the other end of the reset elastic member 257 is fixed to the corresponding sieve plate 23. The reset elastic member 257 is at a natural length when the sieve plate 23 is in fit with the vertical plate 22. When the sieve plate 23 is pulled to a horizontal state by the pull rope 251, the reset elastic member 257 is stretched. When the pull rope 251 is released, the sieve plate 23 rotates again to fit together with the vertical plate 22 under the action of the reset force of the reset elastic member 257.

[0041] 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 support 14 and a feed pipe 15 . The thickener body 1 is fixed to the support 14 , and the feed pipe 15 is connected to the thickener body 1 .

[0042] 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 7: when in use, the 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 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 supernatant (i.e., slurry with very low concentration). The supernatant is discharged from the overflow port 12. In order to accelerate the concentration of the slurry, the posture adjustment component 25 drives each of the sieve plates 23 to rotate to be perpendicular to the vertical plate 22 (as shown in Figures 3 and 4), and the lifting plate 21 is driven down by the lifting drive member 24. At this time, each sieve plate 23 moves downward, and particles in the slurry with a particle size smaller than the sieve hole can directly pass through the sieve plate 23, while particles in the slurry with a particle size larger than The particles in the sieve holes are intercepted by the sieve plate 23 and move downward with the sieve plate, thereby accelerating the sinking of particles in the slurry and improving the slurry concentration rate. When the lifting plate 21 descends to the set position, the posture adjustment component 25 drives each of the sieve plates 23 to rotate parallel to the vertical plate 22 (as shown in Figure 5), and the lifting plate 21 is driven to rise by the lifting drive 24. At this time, each sieve plate 23 moves upward. Since each sieve plate 23 is fitted with the corresponding vertical plate 22, a large gap will be exposed between the sieve plates 23. The sieve plate 23 will not intercept mineral particles when moving upward, and therefore will not drive the mineral particles to rise. After the lifting plate 21 rises to the set position, it will descend according to the above steps, and this cycle will be repeated to continuously push the mineral particles downward, thereby greatly accelerating the concentration process of the slurry and improving the concentration efficiency.

[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 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 red soil nickel ore pulp thickener, characterized in that, it includes a thickener body and a material pressing mechanism; The thickener body has a conical accommodating cavity for introducing pulp. An outlet is provided at the bottom end of the thickener body, and an overflow port is provided at the upper end of the thickener body; The material pressing mechanism includes a lifting plate, a plurality of vertical plates, a plurality of sieve plates, a lifting driving member and an attitude adjusting assembly. The lifting plate is arranged in the accommodating cavity. Each of the vertical plates is fixed below the lifting plate. The sieve plates are evenly and densely provided with sieve holes. Each sieve plate is hinged below the corresponding vertical plate. The lifting driving member is used to drive the lifting plate to lift and lower. The attitude adjusting assembly is connected to each sieve plate and is used to drive the sieve plate to rotate. When the lifting plate descends, the attitude adjusting assembly drives each sieve plate to rotate to be perpendicular to the vertical plate. When the lifting plate ascends, the attitude adjusting assembly drives each sieve plate to rotate to be parallel to the vertical plate.

2. The red soil nickel ore pulp thickener according to claim 1, characterized in that, The thickener body has a top cover; the thickener further includes a stirring mechanism, which 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. The stirring motor is installed on the top cover. The stirring motor is connected to the stirring shaft and is used to drive the stirring shaft to rotate. A relief hole for the stirring shaft to pass through is provided on the lifting plate.

3. The red soil nickel ore pulp thickener according to claim 2, characterized in that, A guiding hole is provided on the top cover; the material pressing mechanism further includes a guiding rod and a top plate. The guiding rod is slidably inserted into the guiding hole. The lower end of the guiding rod is fixedly connected to the lifting plate, and the upper end of the guiding rod is fixedly connected to the top plate.

4. The red soil nickel ore pulp thickener according to claim 3, characterized in that, A threaded hole is provided on the top plate; the lifting driving member includes a bracket, a lead screw and a first rotation driving member. The bracket is fixed above the top cover. The two ends of the lead screw are respectively rotatably connected to the bracket and the top cover. The lead screw is threadedly inserted into the threaded hole. The first rotation driving member is connected to the lead screw and is used to drive the lead screw to rotate.

5. The red soil nickel ore pulp thickener according to claim 4, characterized in that, The first rotation driving member includes a rotation driving motor, a driving gear and a driven gear. The rotation driving motor is installed on the bracket. The output shaft of the rotation driving motor is fixedly connected to the driving gear. The driven gear is fixedly sleeved on the lead screw, and the driven gear meshes with the driving gear.

6. The red soil nickel ore pulp thickener according to claim 4, characterized in that, The lifting driving member further includes a nut, which is fixed on the top plate and is coaxial with the threaded hole. The lead screw is threadedly inserted into the nut.

7. The red soil nickel ore pulp thickener according to claim 3, characterized in that, A stop block is formed on the vertical plate. When the sieve plate is perpendicular to the corresponding vertical plate, the upper end surface of the sieve plate abuts against the lower end surface of the stop block, thereby preventing the sieve plate from continuing to rotate upward; the attitude adjustment assembly includes a plurality of stay ropes, a fixing frame, a winding wheel and a second rotation driving member. One end of each stay rope is fixedly connected to the corresponding sieve plate, and the other end of each stay rope is wound around the winding wheel. The fixing frame is fixed on the top plate, the winding wheel is rotatably arranged on the fixing frame, and the second rotation driving member is connected to the winding wheel and used to drive the winding wheel to rotate.

8. The laterite nickel ore pulp thickener according to claim 7, characterized in that a rotating shaft is rotatably connected to the fixing frame, and the winding wheel is fixed to the rotating shaft; the second rotation driving member includes a winding motor, a driving sprocket, a driven sprocket and a synchronous belt. The winding motor is installed on the top plate, the output shaft of the winding motor is fixedly connected to the driving sprocket, the driven sprocket is fixedly sleeved on the rotating shaft, and the two ends of the synchronous belt are respectively wound around the driven sprocket and the driving sprocket.

9. The laterite nickel ore pulp thickener according to claim 7, characterized in that a plurality of guide wheels are rotatably arranged on the lifting plate, and each stay rope is wound around the guide wheel.

10. The laterite nickel ore pulp thickener according to claim 7, characterized in that the attitude adjustment assembly further includes a plurality of reset elastic members, one end of each reset elastic member is fixed to the corresponding vertical plate, and the other end of each reset elastic member is fixed to the corresponding sieve plate.

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