CN116851132A - Coarse particle coal slime recovery system and process based on fluidization flotation machine - Google Patents

Coarse particle coal slime recovery system and process based on fluidization flotation machine Download PDF

Info

Publication number
CN116851132A
CN116851132A CN202310934132.0A CN202310934132A CN116851132A CN 116851132 A CN116851132 A CN 116851132A CN 202310934132 A CN202310934132 A CN 202310934132A CN 116851132 A CN116851132 A CN 116851132A
Authority
CN
China
Prior art keywords
fluidization
flotation machine
flotation
coarse particle
vibrating screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310934132.0A
Other languages
Chinese (zh)
Inventor
邢耀文
桂夏辉
尹青临
曹亦俊
丁世豪
卫召
何琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
Original Assignee
China University of Mining and Technology CUMT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology CUMT filed Critical China University of Mining and Technology CUMT
Priority to CN202310934132.0A priority Critical patent/CN116851132A/en
Publication of CN116851132A publication Critical patent/CN116851132A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/24—Pneumatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

The invention relates to a coarse particle coal slime recovery system and a coarse particle coal slime recovery process based on a fluidization flotation machine, belongs to the technical field of coarse particle mineral separation, and solves the problems of low coarse particle coal slime separation efficiency and poor effect in the prior art. The invention comprises a stirring barrel, a fluidization flotation machine, a circular vibrating screen, a thickening tank, an ore pulp pretreatment device and a flotation column, wherein the fluidization flotation machine is arranged at the downstream of the stirring barrel, the circular vibrating screen is arranged at the downstream of the fluidization flotation machine, the thickening tank is arranged at the downstream of the circular vibrating screen, the ore pulp pretreatment device is arranged at the downstream of the thickening tank, and the flotation column is arranged at the downstream of the ore pulp pretreatment device. According to the invention, coarse slime is directly subjected to separation by the fluidized flotation machine, the fluidized flotation overflow product is clean coal, coarse-particle clean coal is screened out in advance by the circular vibrating screen, the coarse-particle clean coal can be directly sold as a final product, the product under the circular vibrating screen is a fine product, and the fine product can enter a flotation system to realize secondary recovery, so that the separation effect is good.

Description

Coarse particle coal slime recovery system and process based on fluidization flotation machine
Technical Field
The invention relates to the technical field of coarse-grain mineral separation, in particular to a fluidized flotation machine suitable for coarse-grain mineral separation and a separation method.
Background
With the increasing decrease of coal resources and the rapid development of mechanized coal mining and heavy medium coal dressing, the problem of difficult coal slime separation in China is further highlighted, and the problem is particularly shown in the aspect of coarse coal slime separation with the granularity ranging from 0.25mm to 2 mm. At present, a plurality of coarse grain gravity separation devices widely applied in coal preparation plants have more or less defects, such as difficult medium removal of a coal slime dense medium cyclone product, high medium consumption and unstable separation effect; the spiral separator has poor adaptability to coal types and low precision in separating low-density coal; both the water medium cyclone and the interference bed separator have the problems of low separation efficiency, low recovery rate of combustible bodies, low density loss caused by mismatch of coarse-grain clean coal, and the like.
The conventional gravity separation technology has hardly met the separation requirement of coarse slime, the flotation in froth is a coarse particle flotation technology which directly introduces ore pulp into a froth layer to realize coarse particle mineral recovery, hydrophobic particles adhere to bubbles to form concentrate through direct contact of coarse particle mineral and the froth layer, and hydrophilic particles pass through the froth layer to form tailings, but the technology has poor mineral adaptability, and needs to be matched with an efficient foaming agent, so that the technology has little application in practical separation. With the successful development of various coarse-grain mechanical stirring flotation machines, the flash flotation of coarse-grain ore pulp becomes realistic, the flash flotation technology is used for treating cyclone underflow in an ore grinding classification loop, and the separation of target minerals and gangue can be realized in a short time, but the defects are obvious, the high-concentration ore pulp is easy to cause serious abrasion of equipment pipelines and valves, and a plurality of equipment configurations are needed to be combined.
Disclosure of Invention
In view of the above analysis, the embodiment of the invention aims to provide a coarse particle coal slime recovery system and a process based on a fluidization flotation machine, which are used for solving the problems of low separation efficiency and poor effect of the existing coarse particle coal slime.
In one aspect, the invention provides a coarse particle coal slime recovery system based on a fluidization flotation machine, which comprises a stirring barrel, the fluidization flotation machine, a circular vibrating screen, a thickening tank, an ore pulp pretreatment device and a flotation column, wherein the fluidization flotation machine is arranged at the downstream of the stirring barrel, the circular vibrating screen is arranged at the downstream of the fluidization flotation machine, the thickening tank is arranged at the downstream of the circular vibrating screen, the ore pulp pretreatment device is arranged at the downstream of the thickening tank, and the flotation column is arranged at the downstream of the ore pulp pretreatment device.
Further, a discharge hole of the stirring barrel is communicated with a feeder of the fluidization flotation machine, and a first slurry pump is arranged between the stirring barrel and the fluidization flotation machine.
Further, a concentrate pipe of the fluidization flotation machine is communicated with an input port of the circular vibrating screen, and a second slurry pump is arranged between the concentrate pipe and the input port of the circular vibrating screen.
Further, undersize materials of the circular vibrating screen are fed into the thickening tank for sedimentation, and an underflow outlet of the thickening tank is communicated with a feed inlet of the ore pulp pretreatment device.
Further, a third slurry pump is arranged between the underflow outlet of the thickening tank and the feed inlet of the ore pulp pretreatment device.
Further, an overflow outlet of the thickening tank is communicated with a water flow distribution ring of the fluidization flotation machine, and a discharge outlet of the pulp pretreatment device is communicated with the flotation column.
Further, the fluidization flotation machine comprises a column body, wherein the column body comprises a column barrel and a cone barrel which are arranged up and down.
Further, a first flange is arranged at the bottom of the column casing, a second flange is arranged at the top of the cone casing, and the first flange is connected with the second flange.
Further, the height ratio of the column casing to the cone casing is 3:1-5:1.
On the other hand, the invention provides a coarse particle coal slime recovery process based on a fluidization flotation machine, and the coarse particle coal slime recovery system based on the fluidization flotation machine is adopted for coarse particle coal slime recovery.
Compared with the prior art, the invention has at least one of the following beneficial effects:
(1) The invention directly selects coarse slime through a fluidization flotation machine, the overflow product of fluidization flotation is clean coal, coarse-particle clean coal is screened out in advance through a circular vibrating screen, and the coarse-particle clean coal can be directly sold as a final product. The product under the circular vibration sieve is a fine product, and is concentrated by a thickener, and overflow clarified water is used as circulating water and returns to the fluidization flotation machine; the underflow high-concentration fine product meets the traditional flotation granularity requirement, and can enter a flotation system to realize secondary recovery.
(2) The invention forms the water-gas mixture by venturi tube jet flow suction, and the water-gas mixture is fed into the cylinder through the fluid distributor, and the pressure storage and the pressure release are carried out when the water-gas mixture passes through the fluid distributor during the period, so that the bubbles are more dispersed in the cylinder. The drag force generated by the rising water flow counteracts the gravity of the particles, so that the particle group is suspended and forms a loose bed layer, meanwhile, a proper static flow field environment is created for the particles, the dispersed bubbles are selectively adsorbed on the particles, the density difference between coal and gangue is increased, and finally, effective separation is realized.
(3) The fluidization flotation machine can control the rising water speed and the gas content by adjusting the water flow rate and the gas flow rate, the rising water speed can be increased by improving the water flow rate, the concentrate recovery rate can be improved, the concentrate grade can be reduced, the gas content can be increased by improving the gas flow rate, the concentrate recovery rate can be improved, and the tailing grade can be reduced.
(4) The fluidized flotation machine is internally provided with a static flow field environment, so that coarse-grain minerals caused by high-turbulence field shearing are prevented from being desorbed from the surfaces of bubbles, and meanwhile, a thin foam layer can also prevent bubble-grain aggregates from being combined and desorbed at a foam phase interface, so that the upper limit of separation granularity is greatly improved; through the structural design of the water flow distribution ring and the air flow distribution ring, the water flow is uniformly distributed to the venturi tubes, the air flow is fully sucked and dispersed in each venturi tube, and the uniform mixing of water and air is realized; the middle layer of the fluid distributor forms a narrow flow channel, so that the pressure storage process of the water-gas mixture is realized, the water-gas mixture is discharged through the pressure release of the upper porous sieve plate, the thinning of bubbles is facilitated, and the secondary dispersion of the bubbles is promoted.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a coarse particle coal slurry recovery system according to an embodiment;
FIG. 2 is a schematic diagram of a fluidized flotation machine in accordance with an exemplary embodiment;
FIG. 3 is a schematic illustration of a fluid distributor of an embodiment;
FIG. 4 is a schematic diagram of the upper layer of the distributor according to the embodiment;
FIG. 5 is a schematic view of a layer structure in a distributor according to an embodiment;
fig. 6 is a schematic structural view of a baffle according to an embodiment.
Reference numerals:
100-stirring barrel; 101-stirring a barrel body; 102-barrel cover; 103-a stirring shaft; 104-stirring impeller; 105-a feed inlet; 106, a discharge hole;
200-fluidization flotation machine; 201-a column; 202-an airflow distribution ring; 203-a water flow distribution ring; 204-a venturi; 205-a fluid distributor; 206-gas flow distribution manifold; 207-water flow distribution branch pipe; 208-connecting pipes; 209-a cartridge; 210-cone; 211-a first flange; 212-a second flange; 213-lower distributor layer; 214-a distributor middle layer; 215-upper distributor layer; 216-baffle; 217-inlet pipe; 218-an access opening; 219-tailings pipe; 220-feeder; 221-overflow weir; 222-concentrate pipe;
300-circular vibrating screen; 400-a thickening tank; 500-an ore pulp pretreatment device; 600-flotation columns; 700-a first slurry pump; 800-a second slurry pump; 900-third slurry pump.
Detailed Description
The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.
Example 1
In one embodiment of the present invention, as shown in fig. 1, a coarse particle coal slime recovery system (hereinafter referred to as coarse particle coal slime recovery system) based on a fluidization flotation machine is disclosed, which comprises a stirring barrel 100, a fluidization flotation machine 200, a circular vibrating screen 300, a thickening tank 400, a pulp pretreatment device 500 and a flotation column 600, wherein the stirring barrel 100, the fluidization flotation machine 200, the circular vibrating screen 300, the thickening tank 400, the pulp pretreatment device 500 and the flotation column 600 are sequentially arranged, that is, the fluidization flotation machine 200 is arranged at the downstream of the stirring barrel 100, the circular vibrating screen 300 is arranged at the downstream of the fluidization flotation machine 200, the thickening tank 400 is arranged at the downstream of the circular vibrating screen 300, the pulp pretreatment device 500 is arranged at the downstream of the thickening tank 400, and the flotation column 600 is arranged at the downstream of the pulp pretreatment device 500.
In practice, the coal slime enters the stirring barrel 100 from the feeding port of the stirring barrel 100, is stirred by the stirring barrel 100, is subjected to flotation by the fluidization flotation machine 200, is subjected to vibration screening by the circular vibration screen 300, is settled in the thickening tank 400, is pretreated by the ore pulp pretreatment device 500, and is finally separated into concentrate and tailings by the flotation column 600.
Compared with the prior art, the coarse particle coal slime recovery system provided by the embodiment directly selects coarse coal slime through a fluidization flotation machine, the fluidization flotation overflow product is clean coal, coarse particle clean coal is screened out in advance through a circular vibrating screen, and the coarse particle clean coal can be directly sold as a final product. The product under the round vibrating screen is a fine product with the diameter of-0.25 mm (less than 0.25 mm), the water is removed by a thickener, and the removed water can return to a fluidization flotation machine, so that water circulation can be realized; the fine product meets the traditional flotation granularity requirement, and can enter a flotation system to realize secondary recovery.
As shown in fig. 1, the stirring barrel 100 comprises a stirring barrel body 101, a barrel cover 102 and a stirring shaft 103, wherein the barrel cover 102 is arranged at the top of the stirring barrel body 101, one end of the stirring shaft 103 penetrates through the barrel cover 102 to be connected with a power mechanism, and the other end of the stirring shaft is positioned in the stirring barrel body 101. A stirring impeller 104 is arranged on a stirring shaft 103 positioned in the stirring barrel body 101, and the pulp is stirred by the stirring impeller 104.
Understandably, in order to send the pulp raw material into the stirring barrel body 101 and output the stirred pulp out of the stirring barrel body 101, the stirring barrel body 101 is provided with a feeding port 105 and a discharging port 106, the feeding port 105 is positioned at the upper part of the stirring barrel body 101, the discharging port 106 is positioned at the lower part of the stirring barrel body 101, and the feeding port 105 and the discharging port 106 are respectively positioned at two sides of the stirring barrel body 101.
As shown in fig. 1 and 2, the fluidization flotation machine 200 includes a column 201, a gas flow distribution ring 202, and a water flow distribution ring 203, wherein the gas flow distribution ring 202 and the water flow distribution ring 203 are both sleeved outside the column 201, and the water flow distribution ring 203 is disposed above the gas flow distribution ring 202.
The fluidization flotation machine 200 also includes a venturi 204 and a fluid distributor 205, the airflow distribution ring 202 is in communication with the air inlet of the venturi 204, the airflow distribution ring 203 is in communication with the water inlet of the venturi 204, the outlet of the venturi 204 is in communication with the fluid distributor 205, and the fluid distributor 205 is disposed within the column 201. The outer diameter of the fluid distributor 205 should be maintained at a distance from the inner diameter of the column 201 to facilitate the drainage of the tailings from the gap therebetween, preferably the ratio of the outer diameter of the fluid distributor 205 to the inner diameter of the column 201 is 4.5:5 to 4:5. the venturi 204 should be as close to the airflow distribution ring 202 as possible to facilitate gas distribution and control, so the venturi 204 is located below the airflow distribution ring 203.
In practice, the slurry processed by the stirring barrel 100 is conveyed to the fluidization flotation machine 200 through the discharge hole 106, the air flow distribution ring 202 and the water flow distribution ring 203 respectively supply air and water to the venturi tube 204, the venturi tube 204 mixes the air and the water, and then the air and the water are distributed into the cylinder 201 through the fluid distributor 205 to perform fluidization flotation.
The venturi 204 is provided with a plurality of venturi 204, the plurality of venturi 204 are evenly distributed around the cylinder 201 outside the cylinder 201, the airflow distribution ring 202 is provided with a plurality of airflow distribution branch pipes 206, the plurality of airflow distribution branch pipes 206 are evenly distributed around the airflow distribution ring 202 in a ring shape, each airflow distribution branch pipe 206 is communicated with one venturi 204, the airflow distribution ring 203 is provided with a plurality of airflow distribution branch pipes 207, the plurality of airflow distribution branch pipes 207 are evenly distributed around the airflow distribution ring 203 in a ring shape, each airflow distribution branch pipe 207 is communicated with one venturi 204, and the number of venturi 204, the number of airflow distribution branch pipes 206 and the number of airflow distribution branch pipes 207 are equal.
The venturi 204, the air flow distribution branch 206, and the water flow distribution branch 207 are each provided with 3 to 8, preferably 6. The 6 venturi tubes 204 are uniformly distributed around the cylinder 201, the 6 airflow distribution branch pipes 206 are uniformly distributed along the ring shape of the airflow distribution ring 202, the 6 water flow distribution branch pipes 207 are uniformly distributed along the ring shape of the water flow distribution ring 203, and one venturi tube 204 corresponds to one airflow distribution branch pipe 206 and one water flow distribution branch pipe 207 in position up and down, so that the airflow distribution ring 202, the water flow distribution ring 203 and the venturi tube 204 are regularly distributed around the periphery of the cylinder 201, and the outer side parts of the cylinder 201 are regularly distributed.
It will be appreciated that the plurality of venturi tubes 204 may form a plurality of output ports, and accordingly, the output ports of the venturi tubes 204 are in communication with the fluid distributor 205 via the connecting tubes 208, the number of connecting tubes 208 being equal to the number of venturi tubes 204, one end of the connecting tubes 208 being in communication with the output ports of the venturi tubes 204 and the other end being in communication with the fluid distributor 205.
In this embodiment, an airflow distribution ring 202, a water flow distribution ring 203 and a venturi 204 are disposed on the outer side of the column 201, the water flow distribution ring 203 is communicated with the water inlet of the venturi 204 through a water flow distribution branch pipe 207, the airflow distribution ring 202 is communicated with the air inlet of the venturi 204 through a water flow distribution branch pipe 206, and the venturi 204 mixes air and water and then conveys the air and water to a fluid distributor 205 through a connecting pipe 208, and the air and water are distributed into the column 201 through the fluid distributor 205.
The cylinder 201 comprises a cylinder 209 and a cone 210, the cone 210 is arranged at the bottom of the cylinder 209, a first flange 211 is arranged at the bottom of the cylinder 209, a second flange 212 is arranged at the top of the cone 210, and the first flange 211 and the second flange 212 are connected, so that the cylinder 209 and the cone 210 are connected together. The cone 210 is a truncated cone, and the large bottom surface of the cone 210 is connected to the bottom of the column 209. Notably, the top surface of the fluid distributor 205 is flush with the surface of the second flange 212.
Preferably, to facilitate tailing discharge, the height ratio of the cylindrical barrel 209 to the conical barrel 210 is 3:1 to 5:1, and the cone angle of the conical barrel 210 is 50 to 70 degrees.
As can be appreciated, since the fluid distributor 205 is disposed within the cylinder 201, and in particular within the space of the cone 210, the venturi 204 is disposed outside the cylinder 201, and the connecting tube 208 passes through the side wall of the cone 210 into the interior thereof to connect with the fluid distributor 205.
As shown in fig. 3, 4, 5 and 6, the fluid distributor 205 comprises a three-layer structure, specifically, a lower distributor layer 213, a middle distributor layer 214 and an upper distributor layer 215, wherein the lower distributor layer 213 comprises a baffle 216 and a water inlet pipe 217, the lower end of the water inlet pipe 217 is communicated with the connecting pipe 208, and the upper end is communicated with the central hole of the baffle 216. The middle layer 214 of the flow distributor is a flow channel, the liquid entering from the water inlet pipe 217 flows into the middle layer 214 of the distributor, the upper layer 215 of the distributor is a porous sieve plate, the upper layer 214 of the distributor is covered above the middle layer 214 of the distributor, and the liquid in the middle layer 214 of the distributor enters the column 201 through the holes in the upper layer 215 of the distributor.
In this embodiment, the lower side of the middle layer 214 of the distributor is provided with the lower layer 213 of the distributor, the upper layer is provided with the upper layer 215 of the distributor, the middle layer 214 of the distributor is communicated with the connecting pipe 208 through the water inlet pipe 217, the air-water mixture output from the venturi 204 enters into the space of the middle layer 214 of the distributor for pressure storage, then bulges out from the micropores on the upper layer 215 of the distributor for pressure release, enters into the column 201, the air-water mixture is further dispersed after pressure storage and pressure release, and the air bubbles are dispersed more uniformly.
In order to facilitate equipment overhaul, an overhaul port 218 is formed in the cone 210, and in order to facilitate tailing discharge, a tailing pipe 219 is arranged at the bottom of the cone 210. In order to facilitate the feeding of the material and the recovery of the concentrate, the upper end of the cylindrical drum 209 is provided with a feeder 220 and an overflow weir 221, the overflow weir 221 being connected to a concentrate pipe 222.
In this embodiment, the water containing the foaming agent is fed into the water distribution ring 203, the water is uniformly distributed to six water distribution branch pipes 207 through the water distribution ring 203, and the water is sucked into the air through the venturi 204 by a pressure jet of 0.1 to 0.3Mpa and forms a water-air mixture. The air fed to the airflow distribution ring 202 is then uniformly fed to six airflow distribution branch pipes 206, and finally enters the venturi 204. The mixture of water and gas is fed via venturi 204 to six connection tubes 208, collected via inlet tubes 217 and fed to a fluid distributor 205. The mixture of water and gas rises from the upper orifice plate of the fluid distributor 205 and is distributed uniformly within the column 201.
Coarse-grained minerals treated by the collecting agent are fed into the upper part of the column 201 in a pressureless manner through the feeder 220, part of coarse-grained minerals form a loose bed under the action of rising water flow, the fed coarse-grained minerals do interference sedimentation movement in the bed, the residence time of particles in the bed is prolonged, meanwhile, the collision probability of the particles and bubbles is increased, the bubbles are selectively adsorbed on the surfaces of concentrate particles, and therefore the effective density of the concentrate particles is reduced, and the apparent density difference between the concentrate particles and gangue particles is enlarged. Eventually the bubble-particle aggregates float up to form concentrate and flow out of the overflow weir 221 via concentrate pipe 222 to form concentrate. Gangue particles not adsorbed by the bubbles slowly pass through the bed layer and enter the cone 210, and are discharged through a tailing pipe 219 at the lower part of the cone 210 to form tailings.
In the embodiment, the rising water speed and the gas content can be controlled by adjusting the water flow rate and the gas flow rate, the rising water speed can be increased by improving the water flow rate, the concentrate recovery rate is improved, the concentrate grade is reduced, the gas content can be increased by improving the gas flow rate, the concentrate recovery rate is improved, and the tailing grade is reduced.
The fluidized flotation machine is provided with a static flow field environment, so that coarse-grain minerals caused by high-turbulence field shearing are prevented from being desorbed from the surfaces of bubbles, and meanwhile, a thin foam layer can also prevent bubble-grain aggregates from being combined and desorbed at a foam phase interface, so that the upper limit of separation granularity is greatly improved; through the structural design of the water flow distribution ring and the air flow distribution ring, the water flow is uniformly distributed to the venturi tubes, the air flow is fully sucked and dispersed in each venturi tube, and the uniform mixing of water and air is realized; the middle layer of the fluid distributor forms a narrow flow channel, so that the pressure storage process of the water-gas mixture is realized, the water-gas mixture is discharged through the pressure release of the upper porous sieve plate, the thinning of bubbles is facilitated, and the secondary dispersion of the bubbles is promoted.
As shown in fig. 1, the discharge port 106 of the stirring tank 100 is communicated with the feeder 220 of the fluidization flotation machine 200, the ore pulp in the stirring tank 100 is conveyed into the fluidization flotation machine 200 through the first slurry pump 700, the concentrate pipe 222 of the fluidization flotation machine 200 is communicated with the input port of the circular vibrating screen 300, the second slurry pump 800 is arranged between the concentrate pipe 222 of the fluidization flotation machine 200 and the input port of the circular vibrating screen 300, the oversize material of the circular vibrating screen 300 is coarse concentrate, the oversize material of the circular vibrating screen 300 is discharged from the coarse concentrate outlet, the undersize material of the circular vibrating screen 300 is fed into the thickening tank 400 for sedimentation, the underflow outlet of the thickening tank 400 is communicated with the feed port of the ore pulp preprocessor 500 through the third slurry pump 900, the overflow outlet of the thickening tank 400 is communicated with the water flow distribution ring 203 of the fluidization flotation machine 200, and the discharge port of the ore pulp preprocessor 500 is communicated with the column 600.
Example 2
In another embodiment of the present invention, as shown in fig. 1 to 6, a coarse particle slime recovery process based on a fluidization flotation machine is disclosed, and the coarse particle slime recovery system based on a fluidization flotation machine of embodiment 1 is adopted, and the steps include:
step 1: the coarse coal slime is fed into a stirring barrel 100, a collecting agent is added, slurry is stirred, ore pulp is fed into a fluidization flotation machine 200 through a first slurry pump 700 for separation, coarse tailings are discharged from a tailings pipe 219, separated concentrate of the fluidization flotation machine 200 is fed into a circular vibrating screen 300 through a second slurry pump 800 for screening, and a product on the screen is coarse concentrate.
In the step, the coarse coal slime is added with the collector to be pre-slurried in the stirring barrel 100, so that the collector can be effectively adsorbed on the surfaces of the coal particles, and the effective adsorption of bubbles and the coal particles in the fluidization flotation process can be realized, thereby increasing the density difference between the coal particles and the gangue particles. Coarse slime after pulp mixing enters a fluidized flotation machine 200 for separation, separation overflow is used as clean coal to enter a circular vibrating screen 300 for screening, coarse clean coal on the screen is used as a final product, and fine products under the screen enter a flotation system for secondary separation.
Step 2: the undersize product of the circular vibrating screen 300 is fed into a thickening tank 400 for sedimentation, and overflow clean water of the thickening tank 400 is fed back to a water inlet of the fluidization flotation machine 200 after being supplemented with foaming agent, so that circulation is formed.
In the step, the undersize products are dehydrated in the dense pool 400 and then enter a flotation system for secondary separation, and the overflow water of the dense pool 400 contains part of foaming agent and returns to the fluidization flotation machine 200 after the foaming agent is added, so that closed circulation of water flow can be realized, and water is saved.
Step 3: the underflow of the thickening tank 400 is fed into the pulp preprocessor 500 through the third slurry pump 900, the collector is added into the pulp preprocessor 500 and the pulp is mixed, the pulp is fed into the flotation column 600 for flotation after being preprocessed, the overflow product of the flotation column 600 is fine concentrate, and the underflow product is fine tailings.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. Coarse particle coal slime recovery system based on fluidization flotation machine, its characterized in that includes agitator (100), fluidization flotation machine (200), circular vibrating screen (300), dense pond (400), ore pulp preprocessor (500) and flotation column (600), fluidization flotation machine (200) are located the low reaches of agitator (100), circular vibrating screen (300) are located the low reaches of fluidization flotation machine (200), dense pond (400) are located the low reaches of circular vibrating screen (300), ore pulp preprocessor (500) are located the low reaches of dense pond (400), flotation column (600) are located the low reaches of ore pulp preprocessor (500).
2. Coarse particle slime recovery system based on a fluidization flotation machine according to claim 1, characterized in that the discharge opening (106) of the stirring tank (100) is in communication with the feeder (220) of the fluidization flotation machine (200), a first slurry pump (700) being arranged between the stirring tank (100) and the fluidization flotation machine (200).
3. The coarse particle slime recovery system based on a fluidization flotation machine according to claim 1, characterized in that a concentrate pipe (222) of the fluidization flotation machine (200) is in communication with the inlet of the circular vibrating screen (300), a second slurry pump (800) being arranged between the concentrate pipe (222) and the inlet of the circular vibrating screen (300).
4. Coarse particle slime recovery system based on a fluidization flotation machine according to claim 1, characterized in that the undersize of the circular vibrating screen (300) is fed into the thickening tank (400) for sedimentation, the underflow outlet of the thickening tank (400) being in communication with the feed inlet of the pulp pre-processor (500).
5. The coarse particle slime recovery system based on a fluidization flotation machine according to claim 4, characterized in that a third slurry pump (900) is arranged between the underflow outlet of the thickening tank (400) and the inlet of the slurry pre-processor (500).
6. The coarse particle slime recovery system based on a fluidization flotation machine according to claim 1, characterized in that the overflow outlet of the thickening tank (400) is in communication with the water flow distribution ring (203) of the fluidization flotation machine (200), the discharge port of the pulp pre-processor (500) is in communication with the flotation column (600).
7. A coarse particle slime recovery system based on a fluidization flotation machine according to any one of claims 1-6, characterized in that the fluidization flotation machine (200) comprises a column (201), the column (201) comprising a column (209) and a cone (210) arranged one above the other.
8. The coarse particle slime recovery system based on a fluidization flotation machine according to claim 7, characterized in that the bottom of the column casing (209) is provided with a first flange (211), the top of the cone casing (210) is provided with a second flange (212), and the first flange (211) and the second flange (212) are connected.
9. The coarse particle slime recovery system based on a fluidized flotation machine of claim 7, characterized in that the height ratio of the column (209) and the cone (210) is 3:1-5:1.
10. A coarse particle slime recovery process based on a fluidization flotation machine, characterized in that coarse particle slime recovery is performed by using the coarse particle slime recovery system based on a fluidization flotation machine according to any one of claims 1-9.
CN202310934132.0A 2023-07-27 2023-07-27 Coarse particle coal slime recovery system and process based on fluidization flotation machine Pending CN116851132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310934132.0A CN116851132A (en) 2023-07-27 2023-07-27 Coarse particle coal slime recovery system and process based on fluidization flotation machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310934132.0A CN116851132A (en) 2023-07-27 2023-07-27 Coarse particle coal slime recovery system and process based on fluidization flotation machine

Publications (1)

Publication Number Publication Date
CN116851132A true CN116851132A (en) 2023-10-10

Family

ID=88223393

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310934132.0A Pending CN116851132A (en) 2023-07-27 2023-07-27 Coarse particle coal slime recovery system and process based on fluidization flotation machine

Country Status (1)

Country Link
CN (1) CN116851132A (en)

Similar Documents

Publication Publication Date Title
CN110586340B (en) Coarse particle mineral hydraulic flotation equipment and method based on orifice plate hydraulic cavitation bubble formation
CN102225354B (en) Re-flotation hybrid selecting process and selecting device thereof
WO2020252960A1 (en) Sorting and recycling system and sorting and recycling process for coarse-grained coal slurry
CN103480501B (en) Phosphate ore floatation method and system
CN112452552B (en) Coarse-grained mineral dissociation device and method integrating tailing discarding and dissociation
CN111375483B (en) Separation system and separation process for coal slime recovery
CN110882851B (en) Beneficiation system and beneficiation method for sulfide ore
CN110882852B (en) Coarse particle mineral flotation enhanced recovery system and recovery method
CN110665646B (en) Three-product cyclone flotation device and flotation method
CN112588454B (en) Secondary hydraulic flotation machine and flotation method for sorting coarse mineral particles
CN111389580B (en) Three-product hydraulic flotation machine for coarse particle recovery and separation method
WO2020220583A1 (en) Combined-flow enhanced flotation separation device and method
CN112403686A (en) Coarse-grained mineral dissociation device and method
CN116851132A (en) Coarse particle coal slime recovery system and process based on fluidization flotation machine
CN213792209U (en) Coal slime flotation system device
CN110918269B (en) Heavy-floating sorting device for wide-size-fraction preselection and reverse flotation
CN116809229A (en) Nonferrous metal coarse-grain mineral pre-separation waste throwing system and process based on fluidization separation
CN114713379B (en) Fluidized flotation device and method suitable for coarse particle recovery
CN118237176A (en) Coarse particle fluidization flotation device and method suitable for feeding with more fine particles
CN114700181B (en) Flotation device and method suitable for coarse slime separation
CN114308400B (en) Cyclone jet micro-nano bubble flotation column
CN113304891B (en) Coarse slime recycling and sorting equipment and method
CN217164893U (en) Pulse jet cyclone flotation machine
RU2736251C1 (en) Foam flotation machine
CN109092545B (en) Gravity-flotation combined sorting device and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination