CN210434689U

CN210434689U - Forced circulation quick flotation separation device

Info

Publication number: CN210434689U
Application number: CN201920605497.8U
Authority: CN
Inventors: 张海军; 刘炯天; 闫小康; 王利军; 刘清侠; 马子龙; 李丹龙; 李鑫
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-05-01
Anticipated expiration: 2029-04-29

Abstract

A forced circulation quick flotation separation device is suitable for flotation of easily floating coarse particle minerals or coal. Comprises a transmission mechanism, a flotation tank body, a quick floating system and a forced circulation system; the flotation cell body below is for falling the halfpace, and the top is equipped with the foam groove, and the lower in foam groove is equipped with the concentrate discharging pipe, lies in the foam groove department in the drum and is equipped with the sieve, and the flotation cell body falls the halfpace and is equipped with forced circulation system, is equipped with a plurality of guide plates between forced circulation system and the sieve, and flotation cell body top is equipped with drive mechanism, forced circulation system comprises last draft tube, propulsion wheel, dispersion stator, centrifugal mineralization wheel and the lower guiding device who sets up in the centrifugal mineralization wheel below and fix the cell body bottom. The device has simple structure and high separation efficiency.

Description

Forced circulation quick flotation separation device

Technical Field

The utility model relates to a forced circulation quick flotation separation device is particularly useful for easily floating in the coarse grain mineral or the coal flotation separation process and uses.

Background

At present, the equipment for mineral flotation separation mainly comprises two main types of equipment, namely a flotation machine and a flotation column. Among them, the flotation machine is considered to be relatively suitable for the flotation of coarse mineral particles, and is widely used and industrially practiced. According to the working principle, the method can be mainly divided into a mechanical stirring type flotation machine and an air type flotation machine. The self-suction mechanical stirring flotation machine is characterized in that the rotation of an impeller or a rotor leads ore pulp to be aerated and stirred; the air agitation type flotation machine is a flotation machine combining mechanical agitation and externally pressed air. The air-compression flotation machine is a flotation machine which is provided with an external air compressor to feed compressed air so as to inflate and stir ore pulp. The gas separating flotation machine separates dispersed bubbles from ore pulp by changing the gas pressure in the ore pulp and stirs the ore pulp. The flotation machines all have the defects that an effective ore pulp circulating mineralization sorting mechanism is lacked in single equipment, particularly for difficultly floated mineral particles; in addition, the flotation of coarse-grained minerals has the defects of weak suspension dispersion capacity, slow floating speed and the like, and the means for improving the flotation recovery rate of the minerals mainly depends on increasing the number of flotation machines. Therefore, it is necessary to design a new flotation machine based on a reasonable flotation separation process design to compensate for the above disadvantages.

Disclosure of Invention

The technical problem is as follows: aiming at the technical problems, the forced circulation rapid flotation separation device is simple in structure, enhances the recovery capacity of coarse-grained minerals through implementation of rapid flotation and forced circulation mineralization, solves the problems that the pulp circulation capacity is insufficient and the coarse-grained flotation speed is low in the existing tank flotation process, improves the suspension capacity and the flotation speed of the coarse-grained minerals, and enhances the recovery capacity of the coarse-grained minerals.

The technical scheme is as follows: in order to realize the technical purpose, the forced circulation quick flotation separation device comprises a transmission mechanism, a flotation tank body, a quick flotation system and a forced circulation system;

the flotation cell body comprises a cylinder, a reversing ladder platform of a funnel structure is arranged below the cylinder, a foam tank is arranged at the top of the cylinder, a concentrate discharge pipe is arranged at the lowest position of the foam tank, a sieve plate is arranged at the foam tank position in the cylinder, a forced circulation system is arranged in the reversing ladder platform of the flotation cell body, a plurality of guide plates are vertically arranged in the side wall of the flotation cell body between the forced circulation system and the sieve plate, a gas dispersion box is arranged at the bottom of the reversing ladder platform of the flotation cell body, a first micro-bubble generator which forms an angle of 45 degrees with the vertical direction is arranged on the side wall of the gas dispersion box, a tailing discharge pipe is arranged at the bottom of the gas dispersion box, a transmission mechanism is arranged at the top of the flotation cell body, the transmission mechanism is fixed on the flotation cell body through a support frame, a stirring, a feeding pre-mineralization pipe extending to the outer side of the flotation tank body is arranged on the side surface of the feeding sleeve, a second micro-bubble generator forming an angle of 45 degrees with the feeding direction is arranged on the feeding pre-mineralization pipe, a quick-floating cover plate is arranged below the feeding sleeve, the quick-floating cover plate is arranged at the middle position of the flotation tank body, a centrifugal dispersion wheel is arranged on a stirring shaft below the quick-floating cover plate, the forced circulation system comprises an upper guide cylinder, a propulsion wheel, a dispersion stator, a centrifugal mineralization wheel and a lower guide device arranged below the centrifugal mineralization wheel and fixed at the bottom of the tank body, the dispersion stator is matched with the lower guide device, the propulsion wheel is arranged in the upper guide cylinder, the circle center of the propulsion wheel is penetrated by the stirring shaft, the lower guide device comprises a guide inverted cone, a discharging bottom plate and a lower guide cylinder arranged at the middle part of the discharging bottom plate, the center and the periphery of the bottom plate of the discharging bottom plate are provided with, discharge bottom plate top is equipped with the water conservancy diversion back taper, and centrifugal mineralization wheel sets up at the water conservancy diversion back taper center, the dispersion stator includes a plurality of rectangle ore pulp dispersion boards and mineralize mineralization apron, and wherein a plurality of rectangle ore pulp dispersion boards are along the vertical setting of radial equipartition between water conservancy diversion back taper internal diameter and centrifugal mineralization wheel, and circular mineralize mineralization apron sets up in a plurality of rectangle ore pulp dispersion boards tops, and the (mixing) shaft passes mineralize mineralization apron and finally is connected with centrifugal mineralization wheel.

The quick floating system is arranged above the forced circulation system; the upper guide cylinder is in an open inverted cone structure, and the propulsion wheel is arranged in the upper guide cylinder and fixed on the stirring shaft; the discharge bottom plate is arranged at the conical position at the bottom of the tank body and is close to the lower part of the ore pulp dispersion plate, and an ore pulp discharge hole is formed between the discharge bottom plate and the tank wall of the inverted terrace; microporous ceramics are arranged in the first micro-bubble generator and the second micro-bubble generator.

Has the advantages that: compared with the prior art, the ore pulp flowing and flotation separation process is more reasonable when the device is used, and the ore pulp after size mixing and pre-mineralization is fed into the tank body through the quick floating system, so that easily floating particles quickly float out; the medium floatable particles and the non-floatable particles are forced to collide with bubbles under the action of a centrifugal mineralization wheel through a forced circulation system, and are dispersed into the tank body through a diversion inverted cone capable of generating upward flow, the mineralized particles and the fast floatable bubbles are quickly discharged out of the tank body, and the particles which are not mineralized are circularly sorted in the tank body for multiple times; the upward flow generated by the bottom diversion inverted cone further improves the suspension capacity and the flotation speed of coarse-grained minerals, the forced circulation system strengthens the mineralization effect of medium floatable and difficult-to-float particles, and improves the recovery capacity of mineral particles.

The recovery capacity of a single flotation machine for coarse-grained minerals is enhanced through implementation of rapid flotation and forced circulation mineralization, so that the problems that the pulp circulation capacity is insufficient and the coarse-grained flotation speed is low in the existing tank flotation process are solved, the suspension capacity and the flotation speed of the coarse-grained minerals are improved, the recovery capacity of the coarse-grained minerals is enhanced, and the flotation energy efficiency of the single flotation machine is improved.

Drawings

Fig. 1 is a schematic structural diagram of a forced circulation rapid flotation separation device of the utility model.

In the figure: 1-a foam tank, 2-a concentrate discharge pipe, 3-a flotation tank body, 4-a guide plate, 5-a guide inverted cone, 6-a lower guide cylinder, 7-a first microbubble generator, 8-a transmission mechanism, 9-a stirring shaft, 10-a sieve plate, 11-a quick-floating cover plate, 12-a centrifugal dispersion wheel, 13-a propulsion wheel, 14-an ore pulp dispersion plate, 15-a support frame, 16-a feeding sleeve, 17-an upper guide cylinder, 18-a mineralization cover plate, 19-a centrifugal mineralization wheel, 20-a tailing discharge pipe, 21-a second microbubble generator, 22-a feeding pre-mineralization pipe, 23-a discharge bottom plate, 24-a gas dispersion box, an A-feeding pre-mineralization pipe inlet, a B-a second microbubble generator inlet, a C-a first microbubble generator inlet, a D-tailing discharge pipe outlet, and an E-a concentrate discharge pipe outlet.

Detailed Description

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings:

as shown in fig. 1, the forced circulation fast flotation separation device of the present invention comprises a transmission mechanism 8, a flotation tank body 3, a fast flotation system and a forced circulation system;

the flotation cell body 3 comprises a cylinder, a reverse step platform of a funnel structure is arranged below the cylinder, a foam groove 1 is arranged at the top of the cylinder, a concentrate discharge pipe 2 is arranged at the lowest position of the foam groove 1, a sieve plate 10 is arranged at the position, located in the foam groove 1, in the reverse step platform of the flotation cell body 3, a forced circulation system is arranged in the reverse step platform, a plurality of guide plates 4 are vertically arranged in the side wall of the flotation cell body 3 between the forced circulation system and the sieve plate 10, a gas dispersion box 24 is arranged at the bottom of the reverse step platform of the flotation cell body 3, a first micro-bubble generator 7 forming an angle of 45 degrees with the vertical direction is arranged on the side wall of the gas dispersion box 24, a tailing discharge pipe 20 is arranged at the bottom of the gas dispersion box 24, a transmission mechanism 8 is arranged at the top of the flotation cell body 3, the transmission mechanism 8 is fixed on the flotation cell body 3 through a support frame 15, a feeding pre-mineralization pipe 22 extending to the outer side of the flotation tank body 3 is arranged on the side surface of the feeding sleeve 16, a second micro-bubble generator 21 forming an angle of 45 degrees with the feeding direction is arranged on the feeding pre-mineralization pipe 22, a fast floating cover plate 11 is arranged below the feeding sleeve 16, the fast floating cover plate 11 is arranged at the middle position of the flotation tank body 3, a centrifugal dispersion wheel 12 is arranged on a stirring shaft 9 below the fast floating cover plate 11, the forced circulation system comprises an upper guide cylinder 17, a propulsion wheel 13, a dispersion stator, a centrifugal mineralization wheel 19 and a lower guide device arranged below the centrifugal mineralization wheel and fixed at the bottom of the tank body, the dispersion stator is matched with the lower guide device, the propulsion wheel 13 is arranged in the upper guide cylinder 17, the circle center of the propulsion wheel 13 is penetrated by the stirring shaft 9, the lower guide device comprises a guide inverted cone 5, a discharging bottom plate 23 and a lower guide cylinder 6 arranged at the middle part of the discharging bottom plate, wherein, discharging bottom plate 23 sets up in the falling terrace, and lower draft tube 6 sets up in discharging bottom plate 23 below, and discharging bottom plate 23 top is equipped with water conservancy diversion back taper 5, and centrifugal mineralize mineralization wheel 19 sets up at water conservancy diversion back taper 5 center, the dispersion stator includes a plurality of rectangle ore pulp dispersion boards 14 and mineralize mineralization apron 18, and wherein a plurality of rectangle ore pulp dispersion boards 14 are along the vertical setting of radial equipartition between 5 internal diameters of water conservancy diversion back taper and centrifugal mineralize mineralization wheel 19, and circular mineralize mineralization apron 18 sets up in a plurality of rectangle ore pulp dispersion boards 14 tops, and (mixing) shaft 9 passes mineralize mineralization apron 18 and finally is connected with centrifugal mineralize mineralization wheel. The quick floating system is arranged above the forced circulation system; the upper guide cylinder 17 is in an open inverted cone structure, and the propulsion wheel 13 is arranged in the guide cylinder 17 and fixed on the stirring shaft 9; the discharging bottom plate 23 is arranged at the conical position at the bottom of the tank body and is close to the lower part of the ore pulp dispersing plate 14, and an ore pulp discharging hole is formed between the discharging bottom plate 23 and the tank wall of the inverted step; microporous ceramics are provided in the first microbubble generator 7 and the second microbubble generator 21.

A forced circulation rapid flotation separation method comprises the following steps:

a. firstly, closing a tailing discharge pipe 20, feeding pulp after size mixing into a feeding pre-mineralization pipe 22 through a feeding pre-mineralization pipe inlet A, and feeding compressed air into the pulp which is mixed and pre-mineralized with the pulp through a second micro-bubble generator 21 and a second micro-bubble generator inlet B;

b. the mixed and pre-mineralized ore pulp enters a feeding sleeve 16, the ore pulp in the feeding sleeve 16 is fed into a flotation tank body 3 under the action of a rotating centrifugal dispersing wheel 12, the ore pulp enters the lower half part of an inverted step through holes and gaps of a discharging bottom plate 23, compressed air is fed into a gas dispersion box 24 through an inlet C of a first micro-bubble generator 7 to be mixed with the ore pulp, the mixed ore pulp enters a centrifugal mineralizing wheel 19 from a lower guide cylinder 6 and generates upward buoyancy in the constantly rising ore pulp liquid surface along a rectangular ore pulp dispersing plate 14 and a guide inverted cone 5 under the action of the centrifugal mineralizing wheel 19, when the ore pulp liquid surface rises over a quick floating cover plate 11, the quick floating cover plate 11 starts to strengthen the suction force generated when the centrifugal dispersing wheel rotates, so as to generate suction force on a feeding sieve plate, enhance the circulation of the ore pulp and the mineralizing of ore pulp particles, when the ore pulp liquid surface exceeds 10 and is about 200mm away from an overflow surface of an overflow launder, a tailing discharging pipe 20 is opened, at the moment, quick-floating foam is formed through a quick-floating cover plate 11 and a centrifugal dispersion wheel 12, easily-floating particles in the mixed pre-mineralized ore pulp are mineralized and quickly float upwards along with the quick-floating foam, are rectified by a sieve plate 10 and then are discharged from an outlet E of a concentrate discharge pipe 2 on a foam tank 1, and medium-sized floatable particles are fed into a centrifugal mineralization wheel 19 under the action of a propulsion wheel 13 through an upper guide cylinder 17 of a middling forced circulation system so as to further increase the circulation volume of the ore pulp;

e. the particles which are difficult to float in the flotation tank body 3 flow out through a discharge hole in the center of a discharge bottom plate on the discharge bottom plate 23, one part of the particles are discharged from a tailing discharge pipe outlet D of a tailing discharge pipe 20 at the bottom of the tank body, the other part of the particles are sucked into a centrifugal mineralization wheel 19 through a lower guide cylinder 6 in the middle of the discharge bottom plate 23 under the action of centrifugal oxazole sucking force of the centrifugal mineralization wheel 19, a space is formed between the mineralization cover plate 18 and the discharge bottom plate 23 by the fast-floating cover plate 11, the discharge bottom plate 23 and the centrifugal mineralization wheel 19, and centrifugal force generated when the centrifugal mineralization wheel 19 rotates is dispersed into the flotation tank body;

f. compressed air is sent into the gas dispersion box 24 through a first micro-bubble generator inlet C of the first micro-bubble generator 7 and is sucked into a space formed between the mineralization cover plate 18 and the discharge bottom plate 23 together with ore pulp through a lower guide cylinder 6 in the middle of the discharge bottom plate 23;

g. the collision between the strengthening particles and the bubbles under the action of the medium floatable particles and the non-floatable particles centrifugal mineralization wheel 19 is dispersed into the tank body by the rectangular ore pulp dispersion plate 14 and the diversion inverted cone 5 on the stator, so that the ascending and floating of the medium floatable and non-floatable mineralization particles are completed, and the medium floatable and non-floatable mineralization particles and the quick-floating foams are discharged out of the tank body; the particles which are not mineralized are circularly sorted in the tank body for a plurality of times, and tailings are discharged from an outlet D of a tailings discharging pipe 20 at the bottom of the tank body.

Claims

1. A forced circulation quick flotation separation device is characterized in that: the flotation device comprises a transmission mechanism (8), a flotation tank body (3), a fast flotation system and a forced circulation system;

the flotation cell body (3) comprises a cylinder, a reverse step platform of a funnel structure is arranged below the cylinder, a foam groove (1) is arranged at the top of the cylinder, a concentrate discharge pipe (2) is arranged at the lowest position of the foam groove (1), a sieve plate (10) is arranged at the position, located in the foam groove (1), of the cylinder, a forced circulation system is arranged in the reverse step platform of the flotation cell body (3), a plurality of guide plates (4) are vertically arranged in the side wall of the flotation cell body (3) between the forced circulation system and the sieve plate (10), a gas dispersion box (24) is arranged at the bottom of the reverse step platform of the flotation cell body (3), a first microbubble generator (7) forming an angle of 45 degrees with the vertical direction is arranged on the side wall of the gas dispersion box (24), a tailing discharge pipe (20) is arranged at the bottom of the gas dispersion box (24), a transmission mechanism (8) is arranged at the top of, a stirring shaft (9) extending into the flotation tank body (3) and connected with a forced circulation system is arranged below the transmission mechanism (8), a feeding sleeve (16) is arranged at a position between the sieve plate (10) and the forced circulation system on the stirring shaft (9), a feeding pre-mineralization pipe (22) extending to the outer side of the flotation tank body (3) is arranged on the side surface of the feeding sleeve (16), a second micro-bubble generator (21) forming an angle of 45 degrees with the feeding direction is arranged on the feeding pre-mineralization pipe (22), a fast-floating cover plate (11) is arranged below the feeding sleeve (16), the fast-floating cover plate (11) is arranged at the middle position of the flotation tank body (3), a centrifugal dispersion wheel (12) is arranged on the stirring shaft (9) below the fast-floating cover plate (11), the forced circulation system comprises an upper guide cylinder (17), a propelling wheel (13), a dispersion stator, a centrifugal mineralization wheel (19) and a lower guide device arranged below the centrifugal mineralization wheel and fixed, the dispersing stator is matched with a lower flow guide device, a propelling wheel (13) is arranged in an upper flow guide cylinder (17), the circle center of the propelling wheel (13) is penetrated by a stirring shaft (9), the lower flow guide device comprises a flow guide inverted cone (5), a discharge bottom plate (23) and a lower flow guide cylinder (6) arranged in the middle of the discharge bottom plate, the center and the periphery of the bottom plate of the discharge bottom plate (23) are provided with holes, the discharge bottom plate (23) is arranged in an inverted ladder platform, the lower flow guide cylinder (6) is arranged below the discharge bottom plate (23), the flow guide inverted cone (5) is arranged above the discharge bottom plate (23), a centrifugal mineralization wheel (19) is arranged in the center of the flow guide inverted cone (5), the dispersing stator comprises a plurality of rectangular ore pulp dispersing plates (14) and a mineralization cover plate (18), wherein the plurality of rectangular ore pulp dispersing plates (14) are uniformly and vertically arranged between the inner diameter of the flow guide inverted cone (5) and, the circular mineralization cover plate (18) is arranged above the plurality of rectangular ore pulp dispersion plates (14), and the stirring shaft (9) penetrates through the mineralization cover plate (18) and is finally connected with a centrifugal mineralization wheel.

2. The forced circulation rapid flotation separation device of claim 1, wherein: the quick floating system is arranged above the forced circulation system; the upper guide cylinder (17) is in an open inverted cone structure and is fixed on the stirring shaft (9); the discharge bottom plate (23) is arranged at the conical position at the bottom of the tank body and is close to the lower part of the ore pulp dispersion plate (14), and an ore pulp discharge hole is formed between the discharge bottom plate (23) and the tank wall of the inverted step; microporous ceramics are arranged in the first micro-bubble generator (7) and the second micro-bubble generator (21).