Rapid-concentration spiral-activation sand-discharging deep-cone paste thickener

Abstract

The utility model belongs to the technical field of thickeners, and discloses a rapid-concentration spiral-activation sand-discharging deep-cone paste thickener which comprises a pool body, and the pool body is composed of a straight barrel part, a cone part and a converging barrel which are sequentially connected from top to bottom; a thickener main shaft is vertically arranged in the tank body, a dewatering rod system is arranged on the thickener main shaft, and an activation screw mechanism is arranged at the bottom end of the thickener main shaft and located in the gathering barrel; a bridge frame is arranged at the top end of the straight barrel part, and a driving mechanism for driving a main shaft of the thickener to rotate is arranged at the top of the bridge frame; a flocculation mixing center feeding box is arranged below the bridge frame, and an underflow sand discharging opening is formed in the gathering barrel. The dewatering device is provided with the liftable dewatering rod, so that water is efficiently and densely guided; the bottom of the pool adopts a large cone angle design, and self-slipping and gathering settled sand are realized; an activation screw mechanism is arranged at the bottom of the tank body, so that fluidized stable sand discharge is realized; the tank body adopts an assembly type structure and is efficiently and accurately mounted. The device is suitable for solid-liquid separation, especially for tailing filling thickening of small and medium-sized mines.

Description

Technical Field

[0001] The utility model relates to the technical field of thickeners, in particular to a fast thickening spiral activated sand-releasing deep cone paste thickener. Background Art

[0002] Full tailings paste filling refers to the process technology of using full tailings discharged from the concentrator as aggregate and cement or other new cementitious materials as gelling agent, mixing and stirring to prepare a slurry with a paste flow state to fill the underground mining area. It has been widely used in mines at home and abroad because of its advantages such as less water seepage, less segregation and uniform filling body.

[0003] Filling mass concentration is the key technical indicator of full tailings paste filling. The higher the filling concentration, the better the filling quality. In this regard, the core process of full tailings paste filling is to thicken and dehydrate the low-concentration tailings slurry discharged from the concentrator to high-concentration or paste tailings slurry. At present, the main methods of mine tailings thickening and dehydration include vertical sand bin thickening and dehydration process, deep cone thickener thickening and dehydration process, and mechanical filtration and dehydration process. The mechanical filtration dehydration method has a complex process and high dehydration cost. It is rarely used in mine filling in my country. The vertical sand bin has low thickening efficiency and underflow concentration, and its application limitations are becoming increasingly greater. The deep cone thickener is widely used due to its advantages of high underflow concentration, high thickening efficiency, and simple process.

[0004] The thickener adopts self-dilution flocculation sedimentation thickening technology, combined with thick mud layer and rake disturbance, and can concentrate the slurry with a solid content of 10% to 35% into an underflow slurry with a solid content of 45% to 75% through gravity sedimentation, achieving high-concentration sand release, and is widely used in many mines. However, after long-term use practice, the existing thickener has the following technical problems:

[0005] (1) To prevent tailings from compacting in the bin and causing poor sand discharge, traditional thickeners generally use an electrically driven rake structure to continuously disturb the underflow, allowing the thickened underflow slurry to be discharged from the underflow port at the bottom of the thickener. However, for tailings with coarse particle sizes, thickeners with a rake structure often experience rake compression accidents, affecting normal production.

[0006] (2) The continuously operating rake structure relies on high-power motor drive, which consumes a lot of energy and does not conform to the concept of green development;

[0007] (3) During the tailings flocculation and sedimentation process, the flocs are dehydrated only under the action of gravity when they settle, and the sedimentation and dehydration efficiency is low. Utility Model Content

[0008] In view of the above problems, the utility model provides a deep cone paste thickener with rapid thickening and spiral activation and sand release. An activation spiral mechanism is arranged at the bottom of the pool body to stir and activate the settled sand and realize fluidized sand release. At the same time, it also has the functions of stirring, lifting and decompressing, thereby reducing the extrusion and compaction of settled sand and creating conditions for stable sand release. There is no need to arrange an additional circulation system, thereby reducing investment. The utility model adopts a rake-free structure and there is no risk of rake pressure.

[0009] The technical solution of the utility model is as follows:

[0010] A fast thickening spiral activated sand-releasing deep cone paste thickener, comprising a tank body, which is composed of a straight barrel portion, a cone portion and a converging barrel connected in sequence from top to bottom; a thickener main shaft is vertically arranged inside the tank body, a dehydration rod system is arranged on the thickener main shaft, and an activation spiral mechanism is arranged in the converging barrel at the bottom end of the thickener main shaft; a bridge is arranged at the top of the straight barrel portion, and a driving mechanism for driving the thickener main shaft to rotate is arranged on the top of the bridge; a flocculation and mixing center feed box is arranged under the bridge, a tailings slurry feed port extending outside the tank body is arranged on the flocculation and mixing center feed box, and a bottom flow sand discharge port is arranged on the converging barrel.

[0011] In a further technical solution, an overflow weir ring is provided on the top of the inner wall or outer wall of the straight barrel portion, and an overflow discharge pipe connected to the overflow weir ring is provided on the outer side of the pool body.

[0012] In a further technical solution, the overflow weir ring is an assembled sawtooth weir.

[0013] In a further technical solution, the inlet of the overflow discharge pipe is located at the lowest point of the overflow weir ring channel, and other positions of the overflow weir ring channel are sloped toward the inlet position of the overflow discharge pipe.

[0014] In a further technical solution, the bottom surface of the flocculation mixing center feed box is a conical surface distribution plate with a center protruding upward, and the outer edge of the bottom surface of the flocculation mixing center feed box is provided with a drop opening.

[0015] In a further technical solution, the dehydration rod system includes a plurality of vertically arranged dehydration rods, and the plurality of dehydration rods are fixed by a transverse fixing frame, and the fixing frame is connected to the thickener main shaft through a mounting sleeve.

[0016] In a further technical solution, the dehydration rod is a rod-shaped part, which rotates synchronously with the main shaft to cut the mud layer, forming a water-conducting gap channel, shortening the length of the water seepage channel, and improving the dehydration efficiency and dehydration degree.

[0017] In a further technical solution, the interior of the pool body is divided into a natural sedimentation zone, an interference sedimentation zone and a compression sedimentation zone from top to bottom, and the dehydration rod system is specifically arranged between the natural sedimentation zone, the interference sedimentation zone and the compression sedimentation zone.

[0018] In a further technical solution, the cone angle of the cone is greater than or equal to 30°.

[0019] In a further technical solution, the pool body is a disassembled piece assembly structure, including several layers of sub-pool bodies, and each layer of the sub-pool body includes several disassembled pieces.

[0020] In a further technical solution, the activation spiral mechanism is an auger spiral belt installed on the thickener main shaft.

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model sets an activation spiral mechanism at the bottom of the pool body to stir and activate the sand settling and realize the fluidized sand release. It also has the functions of stirring, lifting and decompression, reducing the extrusion and compaction of the sand settling, creating conditions for stable sand release, without the need for additional circulation system, and reducing investment;

[0023] 2. The pool body of the utility model is designed as a large cone angle structure. The sediment can flow to the collection bucket by gravity under the action of its own weight, which reduces the working energy consumption. The driving mechanism can be started and stopped at any time, which enhances the adaptability of the thickener to the working conditions. The rake-free structure is adopted, and there is no risk of rake pressure.

[0024] 3. The pool body of the utility model adopts a fully assembled structure, which is pre-installed and inspected in the factory, and the installation is efficient, convenient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the rapid thickening spiral activated sand-releasing deep cone paste thickener described in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Bridge; 2. Straight barrel; 3. Cone; 4. Converging barrel; 5. Driving mechanism; 6. Thickener main shaft; 7. Mounting sleeve; 8. Fixed frame; 9. Dehydration rod; 10. Activation spiral mechanism; 11. Bottom flow sand discharge port; 12. Tailing slurry feed port; 13. Overflow weir ring; 14. Overflow discharge pipe; 15. Flocculation mixing center feed box; 16. Thickener main shaft support base. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0029] Example:

[0030] A fast thickening spiral activated sand-discharging deep cone paste thickener, such as Figure 1As shown, it includes a tank body, which is composed of a straight barrel part 2, a conical part 3 and a converging barrel 4 connected in sequence from top to bottom; a thickener main shaft 6 is vertically arranged inside the tank body, a dehydration rod system is arranged on the thickener main shaft 6, and an activation spiral mechanism 10 is arranged in the converging barrel 4 at the bottom end of the thickener main shaft 6; a bridge 1 is arranged at the top of the straight barrel part 2, and a driving mechanism 5 for driving the thickener main shaft 6 to rotate is arranged on the top of the bridge 1. Specifically, the driving mechanism 5 can select a motor drive system, and the output shaft of the motor drive system is connected to the top of the thickener main shaft 6 through a flange, and a thickener main shaft support base 16 is arranged at the bottom of the converging barrel 4; a flocculation and mixing center feed box 15 is arranged under the bridge 1, and a tailings slurry feed port 12 extending to the outside of the tank body is arranged on the flocculation and mixing center feed box 15, and a bottom flow sand discharge port 11 is arranged on the converging barrel 4.

[0031] In another embodiment, if Figure 1 As shown, an overflow weir ring 13 is provided on the top of the inner wall or outer wall of the straight barrel portion 2, and an overflow discharge pipe 14 connected to the overflow weir ring 13 is provided on the outer side of the tank body.

[0032] In another embodiment, the overflow weir ring channel 13 is a fabricated sawtooth weir, the inlet of the overflow discharge pipe 14 is located at the lowest point of the overflow weir ring channel 13 , and other positions of the overflow weir ring channel 13 are sloped toward the inlet position of the overflow discharge pipe 14 .

[0033] In another embodiment, if Figure 1 As shown, the flocculation mixing center feed box 15 is fixedly connected to the bridge frame 1 and has no connection with the thickener main shaft 6. The bottom surface of the flocculation mixing center feed box 15 is a conical surface distribution plate with a center protruding upward, and the outer edge of the bottom surface of the flocculation mixing center feed box 15 is provided with a drop port.

[0034] In another embodiment, if Figure 1 As shown, the dehydration rod system includes a plurality of vertically arranged dehydration rods 9 , and the plurality of dehydration rods 9 are fixed by a transverse fixing frame 8 , and the fixing frame 8 is connected to the thickener main shaft 6 through a mounting sleeve 7 .

[0035] In another embodiment, the dehydration rod 9 is a rod-shaped member, and the dehydration rod 9 rotates synchronously with the thickener main shaft 6 to cut the mud layer, forming a water-conducting gap channel, shortening the length of the water seepage channel, and improving the dehydration efficiency and dehydration degree.

[0036] In another embodiment, if Figure 1 As shown, the interior of the pool body is divided into a natural sedimentation zone, an interference sedimentation zone and a compression sedimentation zone from top to bottom, and the dehydration rod system is specifically arranged between the natural sedimentation zone, the interference sedimentation zone and the compression sedimentation zone.

[0037] In another embodiment, the cone angle of the cone 3 is greater than or equal to 30°. Specifically, the cone angle of the cone 3 is greater than or equal to the natural repose angle of the tailings slurry body underwater.

[0038] In another embodiment, the pool body is a disassembled structure, including several layers of sub-pool bodies, each layer of sub-pool bodies has a height of 0.5m-6m, each layer of sub-pool bodies includes several disassembled pieces, each disassembled piece has an arc length of 0.5m-3m, and adjacent disassembled pieces are provided with alignment flanges at the joints, which are fixed with bolts, and the gaps between the disassembled pieces are sealed by welding, sealing strips or structural adhesives.

[0039] In another embodiment, if Figure 1 As shown, the activation spiral mechanism 10 is an auger spiral belt installed on the thickener main shaft 6, which has the function of lifting materials.

[0040] In another embodiment, the dehydration rod system and the thickener main shaft 6 can be set to be movably connected, and can be raised and lowered on the thickener main shaft 6 by hydraulic rods or mechanical action. It can always work in the dense and efficient dehydration area, and can stop running to reduce energy consumption.

[0041] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A fast thickening spiral activated sand-discharging deep cone paste thickener, characterized in that: It comprises a tank body, which is composed of a straight barrel part, a conical part and a converging barrel which are sequentially connected from top to bottom; a thickener main shaft is vertically arranged inside the tank body, a dehydration rod system is arranged on the thickener main shaft, and an activation spiral mechanism is arranged in the converging barrel at the bottom end of the thickener main shaft; a bridge is arranged on the top of the straight barrel part, and a driving mechanism for driving the thickener main shaft to rotate is arranged on the top of the bridge; a flocculation and mixing center feed box is arranged under the bridge, a tailings slurry feed port extending to the outside of the tank body is arranged on the flocculation and mixing center feed box, and a bottom flow sand discharge port is arranged on the converging barrel.

2. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 1, characterized in that: An overflow weir ring is provided on the inner wall or the top of the outer wall of the straight barrel portion, and an overflow discharge pipe connected to the overflow weir ring is provided on the outer side of the pool body.

3. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 2, characterized in that: The overflow weir ring is an assembled sawtooth weir.

4. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 2 or 3, characterized in that: The inlet of the overflow discharge pipe is located at the lowest point of the overflow weir ring channel, and other positions of the overflow weir ring channel are sloped toward the inlet position of the overflow discharge pipe.

5. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 1, characterized in that: The bottom surface of the flocculation and mixing center feed box is a conical surface distribution plate with a center convex upward, and the outer edge of the bottom surface of the flocculation and mixing center feed box is provided with a drop port.

6. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 1, characterized in that: The dehydration rod system comprises a plurality of vertically arranged dehydration rods, the plurality of dehydration rods are fixed by a transverse fixing frame, and the fixing frame is connected to the thickener main shaft by a mounting sleeve.

7. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 6, characterized in that: The dehydration rod is a rod-shaped member.

8. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 1, characterized in that: The cone angle of the cone is greater than or equal to 30°.

9. The rapid concentration spiral activation sand-release deep cone paste thickener according to claim 1, characterized in that: The pool body is a disassembled piece assembly structure, including several layers of sub-pool bodies, and each layer of the sub-pool body includes several disassembled pieces.

10. The rapid thickening spiral activated sand-releasing deep cone paste thickener according to claim 1, characterized in that: The activation spiral mechanism is an auger spiral belt installed on the thickener main shaft.

Images