Novel thickener

Abstract

The utility model discloses a novel thickener which comprises a pool body, a tailing pipe and a dosing pipe, the pool body comprises an outer cylinder section and an inverted circular truncated cone section which are sequentially arranged from top to bottom, an overflow groove is formed in the outer edge of the top of the outer cylinder section, and the novel thickener further comprises a rotational flow sedimentation assembly arranged in the outer cylinder section; the blocking cover is sleeved with the outer cylinder section, the material distributing disc and the stirring blade are sequentially and rotationally installed at the axis position of the blocking cover from top to bottom, the outer diameter of the stirring blade is smaller than that of the lower edge of the blocking cover, and the stirring blade extends out of the blocking cover. And the tailing pipe and the dosing pipe are inserted into the blocking cover above the distributing disc. According to the utility model, the phenomenon of'running and mixing 'caused by overflow of fine-particle tailings can be effectively avoided; the rotational flow precipitation assembly is arranged in the outer cylinder section, so that stirring blades do not extend into the concentration area of the tank body, and the rake pressing phenomenon is avoided; the rotational flow precipitation assembly is simple in structure and can be completed through universal parts, and the cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tailings concentration and precipitation, in particular to a novel thickener. Background Art

[0002] As the problem of mine void area management becomes increasingly serious, full tailings filling technology is also developing. As an indispensable equipment in mine production, the thickener directly affects the effect of full tailings thickening technology.

[0003] The thickener is a solid-liquid separation device based on gravity sedimentation. When working, the slurry and flocculant are first mixed in the feed barrel in the thickener tank, and then guided to the surrounding of the tank by the guide plate at the lower end of the feed barrel to diffuse inside the tank. Under the action of gravity, the slurry with a solid content of 10%-20% is settled and concentrated into an underflow slurry with a solid content of 45%-55%. Finally, with the help of a rake installed in the tank, the thickened underflow slurry is discharged from the bottom flow port of the tank, and the upper clear water is discharged from the top drain port, thereby achieving the mud-water separation effect. The current traditional thickener is difficult to thicken the whole tailings for the following reasons:

[0004] 1. The tailings with a particle size of less than 38μm in the whole tailings account for more than 50%, and the particle size is small, which belongs to fine-grained tailings. Due to its light weight and slow sedimentation speed, when the rake rotates, the coarse-grained tailings that can be separated are far less than the fine-grained tailings, resulting in poor thickening effect and low bottom flow mass concentration; and a large amount of fine-grained tailings will also be discharged from the thickener with the overflow water, which will cause serious mixing phenomenon.

[0005] 2. When the thickener cannot discharge continuously, the coarse-grained tailings settle quickly and gather at the bottom of the thickener pool. After the thickener resumes discharging, the bottom of the pool is filled with coarse-grained materials, which can easily cause pipe blockage. If the thickener does not discharge for a long time, it can easily cause rake crushing accidents.

[0006] 3. The cost of the rake accounts for more than 50-80% of the entire thickener. Not only is the structure complex and cannot be universally designed, but a large number of components are customized products, accessories need to be purchased in a targeted manner, independent maintenance is difficult, and construction investment and operating costs are high. Utility Model Content

[0007] The utility model aims to solve the deficiencies in the prior art and provide a novel thickener with good thickening effect, less mixing phenomenon, low cost and no pressure rake.

[0008] The utility model provides a novel thickener, comprising a tank body, a tailings pipe and a dosing pipe, wherein the tank body comprises an outer cylindrical section and an inverted truncated cone section arranged in sequence from top to bottom, an overflow groove is provided at the outer edge of the top of the outer cylindrical section, and the tank body also comprises a cyclone sedimentation component arranged in the outer cylindrical section, the cyclone sedimentation component comprises an intercepting hood sleeved in the outer cylindrical section, a material distribution plate and a stirring blade which are rotatably installed at the axis of the intercepting hood in sequence from top to bottom, the outer diameter of the stirring blade is smaller than the outer diameter of the lower edge of the intercepting hood, the stirring blade extends out of the intercepting hood, and the tailings pipe and the dosing pipe are inserted into the intercepting hood above the material distribution plate.

[0009] The blocking cover includes an inner cylindrical section and a truncated cone section arranged in sequence from top to bottom, the material distribution plate is placed in the inner cylindrical section, the outer diameter of the stirring blade is smaller than the outer diameter of the bottom surface of the truncated cone section, the stirring blade extends out of the truncated cone section, and the tailings pipe and the dosing pipe are vertically inserted into the upper part of the inner cylindrical section.

[0010] It also includes a concentration adjusting water pipe for conveying concentration adjusting water to the interior of the tank body, and the concentration adjusting water pipe is vertically inserted into the inner cylindrical section above the material distribution plate.

[0011] The cyclone sedimentation assembly also includes a support beam placed on the top of the outer cylindrical section and a drive motor installed on the support beam. The barrier cover is fixed to the bottom of the support beam. The rotating shaft of the drive motor is vertically arranged at the axis of the barrier cover. The distribution plate and the stirring blades are fixed on the rotating shaft from top to bottom. The distribution plate and the stirring blades are driven by the drive motor to rotate synchronously in the pool body.

[0012] A plurality of aeration nozzles are arranged on the tank body wall of the inverted truncated table section and are arranged facing the axis of the tank body. The aeration nozzles are connected to the air supply pipe and are supplied with air by the air supply pipe.

[0013] The aeration nozzles are distributed in a spiral shape on the wall of the pool.

[0014] The material distribution plate is in a flat conical shape, and evenly arranged material distribution pieces are provided on the upper part of the material distribution plate, and each material distribution piece extends from the top of the upper end of the material distribution plate to the bottom edge of the lower end.

[0015] The material dividing sheets are arranged on the material dividing plate at intervals of 30 to 90 degrees.

[0016] A triangular overflow weir connected to the overflow trough is arranged at the top of the outer cylindrical section. When the water level in the pool body is higher than the overflow water level, the overflow water flows into the overflow trough through the triangular overflow weir.

[0017] The stirring blades include a plurality of layers of single-stage blades sequentially distributed from top to bottom, and the diameter of the single-stage blades located at the bottom is not less than the diameter of the single-stage blades located at the top.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. A cyclone sedimentation component is added to the pool below the tailings pipe and the dosing pipe, so that the whole tailings are in contact with the rotating material distribution plate, which breaks it up, separates it, and then throws it to the surroundings to achieve uniform feeding. Under the stirring action of the stirring blades, the pool presents a cyclone state, and the whole tailings swirls downward, and the large-grained tailings settle to the concentrated area at the bottom of the pool. Due to the obstruction of the blocking cover and the effect of cyclone classification, the fine-grained tailings move upward from the cyclone center to the upper part of the blocking cover and further flocculate with the flocculant to form larger particles, which are then precipitated to the concentrated area of ​​the pool. This process is repeated until all the tailings are precipitated, which can effectively avoid the "running and mixing" phenomenon caused by the overflow of fine-grained tailings.

[0020] 2. The cyclone sedimentation component is arranged in the outer cylindrical section, so that the stirring blades do not extend into the concentration area of ​​the pool body, and there will be no rake pressure phenomenon.

[0021] 3. The cyclone sedimentation component has a simple structure, and the rotation setting requirements of the distribution plate and the stirring blade are relatively conventional and can be completed by universal parts, which greatly saves costs.

[0022] The utility model has the advantages of convenient construction, low cost, safe and reasonable operation, simple and convenient operation process, high stability and strong reliability, greatly improving the concentration efficiency, and making the whole tailings be better precipitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0025] The marks and corresponding component names shown in the figure are:

[0026] 1. Tank body; 11. Outer cylindrical section; 12. Inverted truncated cone section; 13. Overflow trough; 111. Triangular overflow weir;

[0027] 2. Tailings pipe;

[0028] 3. Dosing pipe;

[0029] 4. Cyclone sedimentation assembly; 41. Blocking cover; 411. Inner cylinder section; 412. Cone section; 42. Material distribution plate; 421. Material distribution sheet; 43. Stirring blade; 44. Support beam; 45. Driving motor; 451. Rotating shaft;

[0030] 5. Adjust the concentrated water pipe;

[0031] 6. Aeration nozzle; 61. Air supply pipe;

[0032] 7. Sand discharge pipe;

[0033] a. Large-particle tailings; b. Fine-particle tailings; c. Overflow water. DETAILED DESCRIPTION

[0034] Embodiment 1

[0035] from Figure 1 It can be seen that the novel thickener of this embodiment includes a tank body 1, a tailings pipe 2, a dosing pipe 3, a cyclone sedimentation assembly 4 and a thickening water pipe 5.

[0036] The tank body 1 comprises an outer cylindrical section 11 and an inverted truncated cone section 12 arranged in sequence from top to bottom, and an overflow groove 13 is provided at the outer edge of the top of the outer cylindrical section 11;

[0037] The cyclone sedimentation assembly 4 is arranged in the outer cylindrical section 11, and the cyclone sedimentation assembly 4 includes a blocking cover 41, a material distribution plate 42, a stirring blade 43, a support beam 44 and a driving motor 45. The support beam 44 is horizontally placed on the top of the outer cylindrical section 11, and the blocking cover 41 is fixed to the bottom of the support beam 44. The blocking cover 41 is sleeved in the outer cylindrical section 11 through the support beam 44 and is coaxially arranged with the pool body 1. The driving motor 45 is installed on the support beam 44 and the rotating shaft 451 of the driving motor 45 is vertically arranged at the axis of the blocking cover 41. The material distribution plate 42 and the stirring blade 43 are fixed on the rotating shaft 451 from top to bottom, and the stirring blade 43 extends out of the blocking cover 41, and the outer diameter of the stirring blade 43 is smaller than the outer diameter of the lower edge of the blocking cover 41. The stirring blade 43 includes at least two layers of single-stage blades distributed in sequence from top to bottom, and the diameters of the single-stage blades in each layer are equal. The material distribution plate 42 and the stirring blade 43 are driven by the driving motor 45 to rotate synchronously in the pool body 1;

[0038] The ends of the tailings pipe 2, the dosing pipe 3 and the concentration adjusting water pipe 5 are vertically inserted into the blocking cover 41 above the distribution plate 42, and the center of the tailings pipe 2 is arranged closely to the center of the distribution plate 42; the tailings pipe 2 is used to transport the whole tailings slurry into the tank body 1, the dosing pipe 3 is used to transport flocculants into the tank body 1, and the concentration adjusting water pipe 5 is used to transport concentration adjusting water into the tank body 1.

[0039] from Figure 1 It can be seen that a sand discharge pipe 7 connected to the interior of the inverted truncated cone section 12 is installed at the bottom of the inverted truncated cone section 12 in this embodiment.

[0040] from Figure 1 It can be seen that in this embodiment, a plurality of aeration nozzles 6 are arranged on the tank wall of the inverted truncated cone section 12 facing the axis of the tank body 1. The aeration nozzles 6 are distributed in a spiral shape on the tank wall 1. The aeration nozzles 6 are connected to the air supply pipe 61 and supplied with air by it.

[0041] from Figure 1 It can be seen that the material distribution plate 42 of this embodiment is in the shape of a flat cone, and the diameter of the cone bottom is much larger than the cone height.

[0042] from Figure 1 It can be seen that the blocking cover 41 of this embodiment includes an inner cylindrical section 411 and a conical section 412 arranged in sequence from top to bottom, the material distribution plate 42 is located in the inner cylindrical section 411, the outer diameter of the stirring blade 43 is smaller than the outer diameter of the bottom surface of the conical section 412, and the stirring blade 43 extends out of the conical section 412.

[0043] from Figure 1 It can be seen that in this embodiment, a plurality of dividing pieces 421 are evenly distributed along a circular array on the upper surface of the dividing plate 42, and each dividing piece 421 extends from the top of the upper end of the dividing plate 42 to the bottom edge of the lower end.

[0044] In the present invention, the dividing pieces 421 are arranged on the dividing plate 42 at intervals of 30 to 90 degrees.

[0045] from Figure 1 It can be seen that in this embodiment, a triangular overflow weir 111 connected to the overflow trough 13 is provided on the top of the outer cylindrical section 11. When the water level in the pool body 1 is higher than the overflow water level, the overflow water c flows into the overflow trough 13 through the triangular overflow weir 111.

[0046] The working process of the utility model is as follows: in production, the whole tailings slurry enters the blocking cover 41 through the tailings pipe 2, and at the same time, the concentrated water and flocculant also enter the blocking cover 41 from the concentrated water pipe 5 and the dosing pipe 3. The whole tailings slurry contacts the distribution plate 42 driven by the driving motor 45 to rotate, and is first broken up and separated by the distribution pieces 421 on the distribution plate 42, and then thrown to the surroundings by the centrifugal action to achieve the effect of uniform feeding; under the stirring action of the stirring blades 43, the pool body 1 below the distribution plate 42 presents a vortex state, and the whole tailings slurry swirls downward and settles, and large particles The granular tailings a settles to the concentration area at the bottom of the tank body 1, and the fine-grained tailings b moves upward from the center of the cyclone along the inside of the frustum section 412 due to the obstruction of the blocking cover 41 and the cyclone classification effect, and after reaching the upper part of the blocking cover 41, it is further flocculated with the flocculant to form larger particles, and then settles to the concentration area of ​​the tank body 1, and this process is repeated until all the tailings are completely precipitated; and the concentrated overflow water c overflows from the edge of the blocking cover 41, and from the triangular overflow weir 111 on the upper part of the tank body 1, overflows into the overflow trough 13, and is discharged from the tank body 1, thereby completing the solid-liquid separation and achieving the effect of thickening the entire tailings.

[0047] Embodiment 2

[0048] from Figure 2 It can be seen that the mixing blades 43 of the novel thickener in this embodiment include at least two layers of single-stage blades distributed sequentially from top to bottom, and the diameter of the single-stage blades in the lower layer is greater than the diameter of the single-stage blades in the upper layer.

Claims

1. A novel thickener, comprising a tank body (1), a tailings pipe (2) and a dosing pipe (3), wherein the tank body comprises an outer cylindrical section (11) and an inverted truncated cone section (12) arranged in sequence from top to bottom, and an overflow groove (13) is provided at the outer edge of the top of the outer cylindrical section, characterized in that: The invention also comprises a cyclone sedimentation assembly (4) arranged in the outer cylindrical section, the cyclone sedimentation assembly comprises a blocking cover (41) sleeved in the outer cylindrical section, a material distribution plate (42) and a stirring blade (43) which are rotatably mounted on the axis of the blocking cover from top to bottom, wherein the outer diameter of the stirring blade is smaller than the outer diameter of the lower edge of the blocking cover, the stirring blade extends out of the blocking cover, and the tailings pipe and the dosing pipe are inserted into the blocking cover above the material distribution plate.

2. The novel thickener according to claim 1 is characterized in that: The blocking cover comprises an inner cylindrical section (411) and a truncated cone section (412) arranged in sequence from top to bottom, the material distribution plate is placed in the inner cylindrical section, the outer diameter of the stirring blade is smaller than the outer diameter of the bottom surface of the truncated cone section, the stirring blade extends out of the truncated cone section, and the tailings pipe and the dosing pipe are vertically inserted into the upper part of the inner cylindrical section.

3. The novel thickener according to claim 2 is characterized in that: It also includes a concentration adjusting water pipe (5) for conveying concentration adjusting water to the interior of the tank body, and the concentration adjusting water pipe is vertically inserted into the inner cylindrical section above the material distribution plate.

4. The novel thickener according to claim 1 is characterized in that: The cyclone sedimentation assembly also includes a support beam (44) placed on the top of the outer cylindrical section and a drive motor (45) installed on the support beam, the baffle cover is fixed to the bottom of the support beam, the rotating shaft (451) of the drive motor is vertically arranged at the axis of the baffle cover, the distribution plate and the stirring blades are fixed on the rotating shaft from top to bottom, and the distribution plate and the stirring blades are driven by the drive motor to rotate synchronously in the pool body.

5. The novel thickener according to claim 1 is characterized in that: A plurality of aeration nozzles (6) are arranged on the tank body wall of the inverted truncated cone section and face the tank body axis. The aeration nozzles are connected to an air supply pipe (61) and are supplied with air by the air supply pipe.

6. The novel thickener according to claim 5 is characterized in that: The aeration nozzles are distributed in a spiral shape on the wall of the pool.

7. The novel thickener according to claim 1 is characterized in that: The material distribution plate is in the shape of a flat cone, and evenly arranged material distribution pieces (421) are provided on the upper part of the material distribution plate, and each material distribution piece extends from the top of the upper end of the material distribution plate to the bottom edge of the lower end.

8. The novel thickener according to claim 7 is characterized in that: The material dividing sheets are arranged on the material dividing plate at intervals of 30 to 90 degrees.

9. The novel thickener according to claim 1 is characterized in that: A triangular overflow weir (111) connected to the overflow trough is arranged at the top of the outer cylindrical section.

10. The novel thickener according to claim 1, characterized in that: The stirring blades include a plurality of layers of single-stage blades sequentially distributed from top to bottom, and the diameter of the single-stage blades located at the bottom is not less than the diameter of the single-stage blades located at the top.

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