Deep cone thickening and activation stirring integrated equipment and slurry preparation method

Abstract

The application discloses a deep-cone thickening and activation stirring integrated equipment and a slurry preparation method. The integrated equipment comprises a thickening part, a sealing device and a mixing part. The thickening part comprises a cylinder and a plurality of anti-caking stirring mechanisms arranged around the cylinder; the cylinder comprises a cylindrical part and a conical part located below the cylindrical part; the lower end of the conical part is sealingly connected with the upper end of the sealing device; each group of anti-caking stirring mechanisms comprises a first base and a support arm mounted on the first base, the upper end of the support arm penetrates through the conical part, and the upper end of the support arm is further provided with a stirring shaft located inside the cylinder and a nozzle; the mixing part comprises a second base, a mixing barrel and a main shaft, the main shaft penetrates through the mixing barrel and the sealing device, the lower end of the main shaft is connected with a motor on the second base, and the upper end is located inside the cylinder. The application has the advantages of not being prone to caking, wall-hanging, uniform stirring, stable discharge flow and concentration, high preparation efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the field of mine filling, in particular to a deep cone thickening and activation stirring integrated equipment, and also to a slurry preparation method. Background Art

[0002] In backfill mining, most mines use vertical sand silos or deep cone thickeners to prepare the slurry required for backfilling. Deep cone thickeners can achieve continuous preparation of backfill slurry and have been widely used.

[0003] In the existing technology, the following problems still exist in the preparation of slurry using deep cone thickeners: 1. If there is an imbalance in the extraction and filling, the filling material in the thickener needs to be stored for several days. At this time, the slurry in the deep cone thickener is prone to compaction. 2. The slurry in the deep cone thickener often has unstable concentration due to uneven mixing. 3. During normal use, deep cone thickeners also generally have problems such as climbing frame pressure rakes, lack of cone activation, and compaction and wall hanging of slurry at the bottom of the sand bin during sand discharge, which in turn affects the volume utilization of the sand bin and the stability of the mortar flow rate and sand discharge concentration. 4. In the existing filling system, the thickener and the cementitious material mixing and stirring equipment are independent of each other, which affects the preparation efficiency of the filling material slurry and is not convenient for the regulation of the extraction and filling balance system. Summary of the Invention

[0004] The present invention proposes an integrated deep cone thickening and activation stirring device and a slurry preparation method, the purposes of which are: 1. to solve the problems of easy compaction, wall adhesion and uneven stirring inside the thickener, and to improve the stability of the discharge flow rate and concentration; 2. to improve the slurry preparation efficiency.

[0005] The technical solutions of the present invention are as follows:

[0006] A deep cone thickening and activation stirring integrated equipment, comprising a thickening part, a sealing device and a mixing part;

[0007] The dense part includes a cylinder and a plurality of anti-caking stirring mechanisms arranged around the cylinder;

[0008] The cylinder includes a cylindrical portion and a conical portion located below the cylindrical portion; the lower end of the conical portion is sealed to the upper end of the sealing transposition;

[0009] Each group of anti-caking stirring mechanisms comprises a first base and a support arm mounted on the first base, the upper end of the support arm passes through the cone portion, and the upper end of the support arm is further provided with a stirring shaft and a nozzle located inside the cylinder;

[0010] The mixing part includes a second base, a mixing barrel and a main shaft, the second base and the mixing barrel are located below the barrel, the lower end of the mixing barrel is sealed with the second base, and the upper end is sealed with the lower end of the sealing device; the main shaft passes through the mixing barrel and the sealing device, the lower end of the main shaft is connected to the motor on the second base, and the upper end is located in the barrel; the mixing part also includes a first stirring blade located in the barrel and a second stirring blade located in the mixing barrel, and the first stirring blade and the second stirring blade are both mounted on the main shaft;

[0011] The mixing barrel is provided with a feeding port and a discharging port.

[0012] As a further improvement to the deep cone thickening and activation stirring integrated equipment: a spiral groove is provided on the outer surface of the main shaft, and the spiral groove extends from the barrel into the mixing barrel.

[0013] As a further improvement to the deep cone thickening and activation stirring integrated equipment, the sealing device includes a housing, in which two gate plates are mounted opposite each other, each gate plate having a semicircular groove on its inner side, and a sealing gasket mounted on its inner side; the two sets of sealing gaskets are used to contact the main shaft;

[0014] Two groups of screw rods corresponding to the gate plates are also installed on the shell, and the inner ends of the screw rods are connected to the corresponding gate plates.

[0015] As a further improvement of the deep cone thickening and activation mixing integrated equipment: the first mixing blades have at least two groups, upper and lower, and each group of first mixing blades includes three circumferentially evenly distributed fan-shaped blades, and the outer end of each fan-shaped blade has an inclination angle of 5° relative to the horizontal plane.

[0016] As a further improvement to the deep cone thickening and activation stirring integrated equipment: the second stirring blade is spiral.

[0017] As a further improvement of the deep cone thickening and activation stirring integrated equipment: a water storage chamber is provided inside the support arm, and the water storage chamber is connected to the nozzle.

[0018] As a further improvement of the deep cone thickening and activation stirring integrated equipment: a motor is also installed at the upper end of the support arm, and the motor is connected to the stirring shaft.

[0019] As a further improvement of the deep cone thickening and activation stirring integrated equipment: the lower end of the support arm is connected to the upper end of the first base via a rotating shaft.

[0020] The present invention also provides a slurry preparation method based on the above-mentioned deep cone thickening and activation stirring integrated equipment, the steps of which are:

[0021] Step 1: Keep the sealing device closed and the main shaft stationary; put the tailings and flocculant into the cylinder;

[0022] Step 2: Start the stirring shaft, observe the concentration at the bottom while stirring the material in the cylinder, and inject high-pressure water through the nozzle to control the concentration;

[0023] Step 3: After flocculation is completed, the sealing device is opened and the main shaft is started. The material in the cylinder flows out from the bottom of the cone part and reaches the mixing barrel through the sealing device. In addition, the stirring shaft remains in working state to stir the material in the cylinder and adjust the material concentration through the nozzle. In addition, cement is added to the mixing barrel through the feed port, and the fully mixed material is output to the next link from the discharge port.

[0024] Compared with the prior art, the present invention has the following beneficial effects: (1) The device adds multiple sets of stirring shafts and nozzles on the inner side of the cylinder of the thickener, which can not only prevent compaction but also control the concentration of the mortar, effectively solving the problem of easy compaction at the bottom of the deep cone thickener and unstable slurry concentration; (2) The thickening part and the mixing part are connected as one through a sealing device. During flocculation, the sealing device is closed and the upper and lower parts are independent of each other. During mixing, the sealing device can be opened. At this time, the cylinder and the mixing barrel are stirred synchronously, which not only improves the mixing effect, but also simplifies the filling process, improves work efficiency, and realizes stable and continuous sand release, so that the filling progress follows the recovery progress, improving The efficiency and safety of mining operations are improved; (3) The main shaft extends from the mixing barrel to the thickener barrel, and the slurry can be stirred simultaneously by the first stirring blade and the second stirring blade, thereby destroying the bonding force between the tailings and cement mixture particles, forcing the cement particles to hydrate layer by layer from the surface, and accelerating the dispersion and hydration of the cement particles; (4) The threaded structure on the main shaft can not only play a certain stirring role, but also play a spiral conveying role, ensuring that the mortar can smoothly pass through the sealing device from the barrel into the mixing barrel. Compared with the slurry entering the mixing barrel by its own gravity, it can speed up and stabilize the flow rate, and prevent compaction and blockage in the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the device;

[0026] Figure 2 is a cross-sectional view of the device;

[0027] Figure 3 This is a three-dimensional diagram of the device from a top-down perspective;

[0028] Figure 4 It is a structural diagram of the sealing device part.

[0029] In the picture:

[0030] 1. Cylinder; 2. First base; 3. Rotating shaft; 4. Support arm; 5. Sealing device; 6. Mixing barrel; 7. Second base; 8. Main shaft; 9. Second stirring blade; 10. Discharge port; 11. Feed port; 12. Nozzle; 13. Stirring shaft; 14. First stirring blade; 501. Shell; 502. Screw; 503. Gate; 504. Sealing gasket. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is described in detail below with reference to the accompanying drawings:

[0032] like Figure 1 , a deep cone thickening and activation stirring integrated equipment, including a thickening part, a sealing device 5 and a mixing part.

[0033] The dense part includes a cylinder 1 and three groups of anti-caking stirring mechanisms arranged around the cylinder 1.

[0034] The cylinder 1 comprises a cylindrical portion and a conical portion located below the cylindrical portion. The lower end of the conical portion is sealed and connected to the upper end of the sealed transposed housing 501 via bolts and a sealing ring.

[0035] Each set of anti-caking stirring mechanisms comprises a vertically disposed first base 2 and a support arm 4 mounted on the first base 2. The upper end of the support arm 4 passes through the cone portion, and the connection is sealed by welding or other means. In this embodiment, the lower end of the support arm 4 is connected to the upper end of the first base 2 via a rotating shaft 3, which facilitates the connection of the support arm 4 by pre-adjusting the angle according to the taper of the cone portion.

[0036] like Figure 2 and 3 The upper end of the support arm 4 is also provided with a stirring shaft 13 located inside the cylinder 1 and four nozzles 12 arranged around the stirring shaft 13. The stirring shaft 13 is provided with spiral blades.

[0037] In this embodiment, the support arm 4 has a water storage chamber disposed therein, which is in communication with the nozzle 12. A pressure pump is also connected to the water storage chamber, which sprays water at high pressure through the nozzle 12. A motor is also mounted on the upper end of the support arm 4, which is connected to the stirring shaft 13 to drive the stirring shaft 13 to rotate.

[0038] like Figure 1 and 2The mixing section includes a second base 7, a mixing barrel 6, and a main shaft 8. The second base 7 and mixing barrel 6 are located below the cylinder 1. The lower end of the mixing barrel 6 is sealed to the second base 7, and the upper end of the mixing barrel 6 is sealed to the lower end of the sealing device 5 via bolts and a sealing ring. The main shaft 8 passes through the mixing barrel 6 and the sealing device 5. The lower end of the main shaft 8 is connected to the motor on the second base 7, and the upper end is located within the cylinder 1.

[0039] Preferably, a spiral groove is provided on the outer surface of the main shaft 8 , and the spiral groove extends from the barrel 1 to the mixing barrel 6 .

[0040] The mixing section also includes a first stirring blade 14 located within the barrel 1 and a second stirring blade 9 located within the mixing barrel 6. Both the first stirring blade 14 and the second stirring blade 9 are mounted on the main shaft 8. The first stirring blade 14 comprises at least two groups, one above the other. Each group of first stirring blades 14 includes three circumferentially evenly spaced fan-shaped blades, with the outer end of each fan-shaped blade inclined at a 5° angle relative to the horizontal plane. The second stirring blade 9 is spiral-shaped.

[0041] The mixing barrel 6 is provided with a feed port 11 and a discharge port 10 .

[0042] like Figure 4 The sealing device 5 includes a shell 501, in which two oppositely arranged gate plates 503 are installed. The inner side of each gate plate 503 is provided with a semicircular groove, and a sealing gasket 504 is also installed on the inner side of the gate plate 503; two sets of sealing gaskets 504 are used to contact the main shaft 8.

[0043] Two sets of screws 502, corresponding one to each gate plate 503, are mounted on the housing 501. The inner ends of the screws 502 are connected to the corresponding gate plates 503. When the screws 502 are rotated forward using the outer handwheel, they move inward relative to the housing 501, pressing against the gaskets 504 through the gate plates 503. This causes the gaskets 504 to grip the main shaft 8, blocking the downward flow of material. (A small amount of leakage is permitted when the main shaft 8 is threaded, but due to the high concentration of tailings, no significant leakage will occur.) When the screws 502 are rotated backward, they move away from the gate plates 503. The gate plates 503 and gaskets 504 return to their original state due to their own elasticity, breaking contact with the main shaft 8. At this point, the material can flow smoothly into the mixing barrel 6.

[0044] The steps for preparing the slurry are:

[0045] Step 1: The sealing device 5 remains closed and the main shaft 8 remains stationary; tailings and flocculants are placed into the cylinder 1.

[0046] Step 2: Start the stirring shaft 13, observe the bottom concentration while stirring the material in the cylinder 1, and inject high-pressure water through the nozzle 12 to control the concentration.

[0047] Step 3: After flocculation is complete, the sealing device 5 is opened and the main shaft 8 is started. The overflow water at the top of the cylinder 1 flows out from the bottom of the cone, passes through the gap between the main shaft 8 and the sealing gasket 504 in the sealing device 5, and reaches the mixing barrel 6. At the same time, the first stirring blade 14 and the second stirring blade 9 simultaneously stir the materials at both the top and bottom. The spiral grooves on the main shaft 8 not only stir the materials but also help the materials move to the mixing barrel 6. At this time, the stirring shaft 13 remains in operation, stirring the materials in the cylinder 1 to prevent them from clumping, and adjusting the material concentration through the nozzle 12. At the same time, cement and other materials are added to the mixing barrel 6 through the feed port 11, and the fully mixed materials are discharged from the discharge port 10 to the next stage.

Claims

1. A deep cone thickening and activation stirring integrated equipment, characterized by: It includes a thickening part, a sealing device (5) and a mixing part; The dense portion comprises a cylinder (1) and a plurality of anti-caking stirring mechanisms arranged around the cylinder (1); The cylinder (1) comprises a cylindrical portion and a conical portion located below the cylindrical portion; the lower end of the conical portion is sealedly connected to the upper end of the sealing device (5); Each group of anti-caking stirring mechanisms comprises a first base (2) and a support arm (4) mounted on the first base (2), the upper end of the support arm (4) passing through the cone portion, and the upper end of the support arm (4) is also provided with a stirring shaft (13) and a nozzle (12) located inside the cylinder (1); The mixing part includes a second base (7), a mixing barrel (6) and a main shaft (8), wherein the second base (7) and the mixing barrel (6) are located below the barrel (1), and the lower end of the mixing barrel (6) is sealedly connected to the second base (7), and the upper end is sealedly connected to the lower end of the sealing device (5); the main shaft (8) passes through the mixing barrel (6) and the sealing device (5), the lower end of the main shaft (8) is connected to the motor on the second base (7), and the upper end is located in the barrel (1); the mixing part also includes a first stirring blade (14) located in the barrel (1) and a second stirring blade (9) located in the mixing barrel (6), and the first stirring blade (14) and the second stirring blade (9) are both mounted on the main shaft (8); The mixing barrel (6) is provided with a feed port (11) and a discharge port (10); The outer surface of the main shaft (8) is provided with a spiral groove, and the spiral groove extends from the inside of the barrel (1) to the inside of the mixing barrel (6); The sealing device (5) comprises a housing (501), two gate plates (503) arranged opposite to each other are installed in the housing (501), a semicircular groove is provided on the inner side of each gate plate (503), and a sealing gasket (504) is also installed on the inner side of the gate plate (503); the two sets of sealing gaskets (504) are used to contact the main shaft (8); Two groups of screw rods (502) corresponding to the gate plates (503) are also installed on the housing (501), and the inner ends of the screw rods (502) are connected to the corresponding gate plates (503).

2. The deep cone thickening and activation stirring integrated equipment according to claim 1, characterized in that: The first stirring blades (14) have at least two groups, upper and lower, and each group of first stirring blades (14) includes three circumferentially evenly distributed fan-shaped blades, and the outer end of each fan-shaped blade has an inclination angle of 5° relative to the horizontal plane.

3. The deep cone thickening and activation stirring integrated equipment according to claim 1, characterized in that: The second stirring blade (9) is spiral-shaped.

4. The deep cone thickening and activation stirring integrated equipment according to claim 1, characterized in that: A water storage chamber is provided inside the support arm (4), and the water storage chamber is in communication with the nozzle (12).

5. The deep cone thickening and activation stirring integrated equipment according to claim 1, characterized in that: A motor is also installed at the upper end of the support arm (4), and the motor is connected to the stirring shaft (13).

6. The deep cone thickening and activation stirring integrated equipment according to claim 1, characterized in that: The lower end of the support arm (4) is connected to the upper end of the first base (2) via a rotating shaft (3).

7. A slurry preparation method based on the deep cone thickening and activation stirring integrated equipment according to any one of claims 1 to 6, characterized in that The steps are: Step 1: The sealing device (5) remains closed and the main shaft (8) remains stationary; tailings and flocculants are placed into the cylinder (1); Step 2: Start the stirring shaft (13), observe the concentration at the bottom while stirring the material in the cylinder (1), and inject high-pressure water through the nozzle (12) to control the concentration; Step 3: After the flocculation is completed, the sealing device (5) is opened and the main shaft (8) is started. The material in the cylinder (1) flows out from the bottom of the cone part and reaches the mixing barrel (6) through the sealing device (5). In addition, the stirring shaft (13) remains in a working state to stir the material in the cylinder (1) and adjust the material concentration through the nozzle (12). In addition, cement is added to the mixing barrel (6) through the feed port (11), and the fully mixed material is output to the next link through the discharge port (10).

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