CN113198620A - Flotation device and flotation method for enhancing recovery of coarse particle minerals - Google Patents
Flotation device and flotation method for enhancing recovery of coarse particle minerals Download PDFInfo
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- CN113198620A CN113198620A CN202110537143.6A CN202110537143A CN113198620A CN 113198620 A CN113198620 A CN 113198620A CN 202110537143 A CN202110537143 A CN 202110537143A CN 113198620 A CN113198620 A CN 113198620A
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- 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
- B03D1/16—Flotation machines with impellers; Subaeration machines
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- 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
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- 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
- B03D1/1418—Flotation machines using centrifugal forces
- B03D1/1425—Flotation machines using centrifugal forces air-sparged hydrocyclones
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Abstract
The application discloses a flotation device and a flotation method for reinforcing coarse particle mineral recovery, and aims to solve the problem that the existing flotation system cannot meet the requirement of coarse particle mineral flotation recovery. Therefore, the flotation device for strengthening recovery of coarse-grained minerals comprises a cylindrical barrel, a stirring sleeve, a three-phase ore pulp disperser and a three-phase mixed mineralizer, wherein the inside of the cylindrical barrel is divided into a tailing underflow groove area, an ore pulp circulation area and a foam layer area which are sequentially communicated from bottom to top, the ore pulp circulation area is divided into a first ore pulp flow area and a second ore pulp flow area which are opposite in flow direction through the stirring sleeve which is communicated from top to bottom, the three-phase ore pulp disperser is arranged in the bottom of the stirring sleeve, mineralized ore pulp is injected into the stirring sleeve from an ore pulp injection hole in the top of the three-phase ore pulp disperser, and jet negative pressure is formed at the position for sucking the coarse-grained minerals at the bottom of the second ore pulp flow area back into the stirring sleeve to form ore pulp circulation.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a flotation device and a flotation method for strengthening recovery of coarse-grained minerals.
Background
Flotation is a method for sorting minerals according to the difference of floatability of the minerals according to the difference of physicochemical properties of the surfaces of the mineral particles. The conventional flotation system mainly sends the adjusted ore pulp into a flotation tank, and the flotation tank is stirred and aerated. The ore particles in the ore pulp contact and collide with the bubbles, the ore particles with good floatability are selectively adhered to the bubbles and carried to rise to form a mineralized foam layer consisting of three phases of gas, liquid and solid, and are mechanically scraped or overflow from the ore pulp surface, and then are dehydrated and dried to form a concentrate product, and the mineral particles such as the non-floatable gangue are discharged from the bottom of the flotation tank as a tailing product along with the ore pulp.
However, the equipment and the process related to the system have poor effect on coarse particle flotation, and the main reason is that the local turbulent energy dissipation rate is increased along with the increase of the rotating speed of the impeller, so that the particle and bubble speed is increased, the integral contact time of the bubbles and the particles in the bubble particle attachment process is reduced, the inertia force is increased, and the coarse particles are separated in the ore pulp; in addition, high speed rotation can result in strong turbulent motion of the slurry, thereby preventing particle-bubble adhesion, further resulting in bubble shedding.
In view of the above, there is a need for improvements to existing flotation systems.
Disclosure of Invention
The invention mainly aims to provide a flotation device and a flotation method for enhancing recovery of coarse-grained minerals, and aims to solve the problem that the existing flotation system cannot meet the requirement of the recovery of the coarse-grained minerals in a flotation mode.
To this end, the flotation device for enhancing the recovery of coarse mineral provided by one aspect of the embodiments of the present application includes:
the device comprises a columnar barrel, a filter screen and a filter screen, wherein the interior of the columnar barrel is divided into a tailing underflow groove area, an ore pulp circulation area and a foam layer area which are communicated in sequence from bottom to top;
the stirring sleeve is arranged in an ore pulp circulating area of the columnar cylinder, and the ore pulp circulating area is divided into two ore pulp flowing areas with opposite flowing directions by the stirring sleeve which is communicated up and down;
the inner area of the stirring sleeve is used as a first pulp flowing area, and the area between the stirring sleeve and the cylindrical barrel is used as a second pulp flowing area;
the three-phase ore pulp disperser is arranged in the bottom of the stirring sleeve;
the mixed mineralizer of three-phase, through the ore pulp feeder pipe with three-phase ore pulp deconcentrator intercommunication, the ore pulp after the mineralize mineralization is followed the ore pulp jet orifice at three-phase ore pulp deconcentrator top jets into in the stirring sleeve to form here and inhale the coarse grain mineral resorption of second ore pulp flow zone bottom extremely form the circulating efflux negative pressure of ore pulp in the stirring sleeve, the jet direction of ore pulp jet orifice with the axis of stirring sleeve is parallel.
Specifically, the flow direction of the slurry in the slurry feeding pipe is opposite to the flow direction of the slurry in the slurry jet holes.
Specifically, the three-phase ore pulp deconcentrator includes that center disk body and even interval arrange a plurality of ore pulp distributing pipes on the periphery wall of center disk body, ore pulp distributing pipe one end seals the setting, the other end with the inner chamber intercommunication of center disk body, every evenly distributed has on the roof of ore pulp distributing pipe the ore pulp jet orifice, the ore pulp feeding pipe with the inner chamber intercommunication of center disk body.
Specifically, the ore pulp feeding pipe is fed from the center of the top of the cylindrical barrel, penetrates through the concentrate overflow groove, is inserted into the stirring sleeve and is connected with the three-phase ore pulp disperser, and the axes of the stirring sleeve, the ore pulp feeding pipe and the cylindrical barrel are overlapped.
Specifically, a tailing discharge valve is arranged at the bottom of the tailing underflow groove area.
Specifically, the tailing underflow groove area is in an inverted cone shape, and the bottom end of the stirring sleeve extends to the tailing underflow groove area.
Specifically, a concentrate discharge pipe is arranged on the concentrate overflow groove.
Specifically, the inner bottom surface of the concentrate overflow groove is an inclined surface, and the concentrate discharge pipe is arranged at the lowest end of the inclined surface.
Specifically, the three-phase mixing mineralization device comprises an ore pulp stirring and conveying assembly, an air supply assembly and a jet mineralization pipe;
the ore pulp stirring and conveying assembly comprises an ore pulp stirring barrel, a pulp inlet ball valve, a variable-frequency slurry pump and an ore pulp flowmeter which are sequentially connected through an ore pulp pipe, wherein a mineral feeding port and a flotation agent feeding port are formed in the ore pulp stirring barrel;
the air supply assembly comprises an air compressor, an air inlet valve, an air storage tank, a gas flow regulating valve, a gas flowmeter and a pressure gauge which are sequentially connected through an air pipe, and the ore pulp pipe and the air pipe are communicated with the jet mineralization pipe.
Another aspect of the present application provides a flotation method for enhancing recovery of coarse mineral, including:
mineralizing the mixed ore pulp by a three-phase mixed mineralizing device to form gas-solid-liquid three-phase jet ore pulp;
the jet pulp descends to the three-phase pulp disperser through the pulp feeding pipe, when the three-phase pulp disperser is filled with the jet pulp, the jet pulp changes the motion direction, and is injected into the stirring sleeve from the pulp injection hole at the top of the three-phase pulp disperser to form jet negative pressure, and the injection direction of the pulp injection hole is parallel to the axis of the stirring sleeve;
mineral particles adhered to the bubbles continuously go upwards in the stirring sleeve, enter a foam layer area of the cylindrical barrel for secondary enrichment, and enter a concentrate overflow trough to become concentrate;
the gangue minerals which are not captured by the bubbles sink in the cylindrical barrel and finally enter a tailing underflow groove area at the bottom of the cylindrical barrel to become tailings;
part of coarse-grained minerals falling off from the bubbles in the flotation process enter an annular gap between the columnar cylinder and the stirring sleeve, and the other part of coarse-grained minerals enter the stirring sleeve; wherein the content of the first and second substances,
coarse particle minerals entering the annular gap flow back to the stirring sleeve from the bottom of the stirring sleeve under the action of negative pressure of jet flow to form ore pulp circulation, the coarse particle minerals entering the stirring sleeve are subjected to countercurrent collision with bubbles to be secondarily adhered, and finally enter a foam layer area along with the rising of the bubbles.
Compared with the prior art, at least one embodiment of the application has the following beneficial effects:
the ore pulp jet and unpowered stirring circulation technology is introduced into the separation link of the flotation device, so that coarse particle minerals which fall off from the bubbles in the flotation process and enter between the stirring sleeve and the cylindrical barrel are subjected to repeated autogenous circulation and collide and adhere with the bubbles again to improve the coarse particle capture probability, and the overall recovery rate is improved. The coarse particle minerals directly falling into the stirring sleeve directly generate countercurrent collision with the bubbles and are brought into the foam layer by virtue of the rising bubbles, so that the desorption probability between the coarse particles and the bubbles is reduced, and even if the coarse particles fall off, the coarse particles can be secondarily adhered by virtue of the rising bubbles in the countercurrent collision area and rise along with the bubbles, so that the problem of 'coarse particle running' in the conventional flotation equipment and the process thereof is powerfully solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a flotation device provided by an embodiment of the invention;
figure 2 is a schematic diagram of a three-phase slurry disperser according to an embodiment of the present invention;
wherein: 1. a pulp feed pipe; 2. a concentrate overflow launder; 3. a concentrate discharge pipe; 4. a cylindrical barrel; 401. a tailings underflow groove zone; 402. a pulp circulation zone; 403. a foam layer region; 5. a stirring sleeve; 6. a three-phase pulp disperser; 601. a central disc body; 602. a pulp distribution pipe; 603. a pulp jet orifice; 7. a tailing discharging pipe; 8. a tailing discharge valve; 9. a pressure gauge; 10. a gas flow meter; 11. a gas flow regulating valve; 12. a gas storage tank; 13. an intake valve; 14. an air compressor; 15. a pulp stirring barrel; 16. a slurry inlet ball valve; 17. a variable frequency slurry pump; 18. a pulp flow meter; 19. and (4) jetting a mineralization pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and 2, a flotation device for reinforcing recovery of coarse particle minerals comprises a cylindrical barrel 4, a stirring sleeve 5, a three-phase ore pulp disperser 6 and a three-phase mixed mineralizer, wherein the inside of the cylindrical barrel 4 is divided into a tailing underflow groove area 401, an ore pulp circulation area 402 and a foam layer area 403 which are sequentially communicated from bottom to top, the top of the cylindrical barrel 4 is provided with a concentrate overflow groove 2, the concentrate overflow groove 2 is provided with a concentrate discharge pipe 3, the stirring sleeve 5 is arranged in the ore pulp circulation area 402 of the cylindrical barrel 4, and the ore pulp circulation area 402 is divided into two ore pulp flow areas with opposite flow directions through the stirring sleeve 5 which is communicated up and down; wherein, 6 tops of three-phase ore pulp deconcentrator are equipped with ore pulp jet orifice 603, the jet direction of ore pulp jet orifice 603 is parallel with the axis of mixing sleeve 5, mixing sleeve 5's inner zone is as first ore pulp flow zone, the region between mixing sleeve 5 and the column barrel 4 is second ore pulp flow zone, three-phase ore pulp deconcentrator 6 sets up in mixing sleeve 5's bottom, the three-phase mixed mineralizer passes through ore pulp feeder pipe 1 and three-phase ore pulp deconcentrator 6 intercommunication, ore pulp after the mineralize mineralization jets in the ore pulp jet orifice 603 on the three-phase ore pulp deconcentrator 6 jets into mixing sleeve 5, and form here and suck back the coarse grain mineral bottom the second ore pulp flow zone to mixing sleeve 5 and form the circulating efflux negative pressure of ore pulp.
Referring to fig. 1 and 2, the process of flotation of minerals using the flotation device of the above embodiment is as follows:
mineralizing the mixed ore pulp by a three-phase mixed mineralizing device to form gas-solid-liquid three-phase jet ore pulp;
the jet flow ore pulp descends to a three-phase ore pulp disperser 6 through an ore pulp feeding pipe 1, when the three-phase ore pulp disperser 6 is filled with the jet flow ore pulp, the jet flow ore pulp changes the movement direction, and is shot into the stirring sleeve 5 in parallel from an ore pulp jet hole 603 at the top of the three-phase ore pulp disperser 6, and jet flow negative pressure is formed at the position;
mineral particles adhered to the bubbles continuously move upwards in the stirring sleeve 5, the whole cylindrical barrel 4 is gradually filled with ore pulp along with the progress of time, target mineral particles at the position above the upper edge of the stirring sleeve 5 are divided into two conditions, and the mineral particles with general hydrophobicity and a small amount of coarse-particle mineral falling from the foam layer are easy to fall off from the bubbles due to large particle size; and another part of mineral particles with better hydrophobicity continuously go upwards to enter the foam layer area 403 of the cylindrical barrel 4 for secondary enrichment, and enter the concentrate overflow trough 2 to be discharged from the concentrate overflow pipe to become concentrate.
Gangue minerals which are not captured by the bubbles sink in the cylindrical barrel 4 and finally enter a tailing underflow groove area 401 at the bottom of the cylindrical barrel 4 to become tailings;
one part of the fallen coarse-particle minerals enter a second pulp flowing area (annular gap) between the cylindrical barrel 4 and the stirring sleeve 5, and the other part of the fallen coarse-particle minerals enter the stirring sleeve 5; wherein, the coarse particle mineral entering into the second slurry flowing area flows back to the stirring sleeve 5 from the bottom of the stirring sleeve 5 under the action of negative pressure of jet flow to form slurry circulation, and the coarse particle mineral entering into the stirring sleeve 5 is subjected to counter-current collision with the air bubbles to perform secondary adhesion, and finally rises with the air bubbles to enter into the foam layer area 403.
In the embodiment, the pulp jet and unpowered stirring circulation technology is introduced into the separation link of the flotation device, so that coarse particle minerals falling from bubbles in the flotation process and entering between the stirring sleeve 5 and the cylindrical barrel 4 are subjected to repeated self-generated circulation and collide and adhere with the bubbles again to improve the coarse particle capture probability, and the overall recovery rate is improved; coarse particle minerals falling in the stirring sleeve 5 directly generate countercurrent collision with the bubbles and are brought into the foam layer by virtue of the rising bubbles, so that the desorption probability between the coarse particles and the bubbles is reduced, even if the coarse particles fall off, the coarse particles can be secondarily adhered by virtue of the rising bubbles in the countercurrent collision area and rise along with the bubbles, and the problem of 'coarse particle running' existing in the traditional flotation equipment and the process thereof is powerfully solved.
In addition, this embodiment is carried the coarse grain mineral that drops in the second ore pulp flow area to the stirring sleeve 5 in with the help of the injection negative pressure that the ore pulp sprays to form, realizes the ore pulp circulation, need not additionally to increase pumping equipment and can realize the circulation flow of coarse grain mineral, and this has reduced the flotation cost undoubtedly, and whole flotation device simple structure, flotation process are also uncomplicated moreover.
Referring to figure 1, in other embodiments the flow direction of slurry in the slurry feeder pipe 1 is opposite to the flow direction of slurry in the slurry injection holes 603. The advantages of such a design are as follows: 1) the ore pulp passing through the ore pulp feeding pipe 1 has high speed, and the ore pulp changes the flow direction through the three-phase ore pulp disperser 6, so that the ore pulp inevitably has high energy consumption, thereby playing a role of stabilizing the flow and being beneficial to the flotation of coarse-particle minerals; 2) a part of kinetic energy of dissipated energy is converted into energy of particle-bubble collision, interaction between particles and bubbles is strengthened, hydrophobic particles are favorably adhered to the bubbles, and secondary mineralization of ore pulp is realized.
Specifically, ore pulp feed pipe 1 is given from 4 top centers of column barrel, and the centre passes behind concentrate overflow launder 2, inserts in the churning sleeve 5 and is connected with three-phase ore pulp deconcentrator 6 is perpendicular, and churning sleeve 5 sets up in the middle of ore pulp feed pipe 1 and column barrel 4 to be parallel with column barrel 4, churning sleeve 5 upper edge is higher than column barrel 4 middle part a little.
Referring to fig. 2, it should be explained that, in practical application, the three-phase slurry disperser 6 comprises a central disk body 601 and a plurality of slurry distributing pipes 602 which are uniformly arranged on the outer peripheral wall of the central disk body 601 at intervals; the number of slurry distribution pipes 602 may be three, four or other numbers, for example, six slurry distribution pipes 602 in this embodiment.
One end of each ore pulp distribution pipe 602 is sealed, the other end of each ore pulp distribution pipe 602 is communicated with the inner cavity of the central disc body 601, the top wall of each ore pulp distribution pipe 602 is uniformly provided with ore pulp injection holes 603, the ore pulp feeding pipes 1 are communicated with the inner cavity of the central disc body 601, and jet ore pulp can uniformly enter each ore pulp distribution pipe 602 after entering the inner cavity of the central disc body 601 through the ore pulp feeding pipes 1 and is finally ejected from the ore pulp injection holes 603.
In three-phase ore pulp deconcentrator 6 of above-mentioned structure can guarantee that the ore pulp homodisperse is to mixing sleeve 5, the clearance that exists between every ore pulp distribution pipe 602 simultaneously can guarantee that the coarse grain mineral that drops in the second ore pulp flow zone can evenly get into mixing sleeve 5 through above-mentioned clearance in for three-phase ore pulp deconcentrator 6's setting can not hinder the circulation flow of coarse grain mineral.
Referring to fig. 1, in other embodiments, the tailings underflow groove area 401 is an inverted cone, and the bottom end of the agitation sleeve 5 extends to the tailings underflow groove area 401, that is, the bottom end of the second slurry flow area gradually gets closer to the agitation sleeve 5, so as to facilitate the coarse-grained minerals to be sucked into the agitation sleeve 5 under the negative pressure of the jet.
Specifically, the included angle of the conical surface of the tailing underflow groove area 401 can be controlled to be 75-80 degrees, a tailing discharging pipe 7 is arranged at the bottom of the tailing underflow groove area 401, the bottom of the tailing discharging pipe 7 is connected with a tailing discharging valve 8 to control the underflow flow rate, and the tailing discharging pipe 7 is used for discharging tailings.
Referring to fig. 1, in other embodiments, the bottom plate of the concentrate overflow launder 2 is inclined at an angle of 50-75 ° to the longitudinal centre line of the cylindrical column, and the concentrate discharge pipe 3 is arranged at the lowest end of the bottom plate. The advantage of above-mentioned design lies in, can discharge the flotation concentrate granule fast, avoids the flotation concentrate granule to pile up in the concentrate overflow launder 2 and leads to blockking up, has guaranteed coarse grain flotation device's job stabilization nature. Along with the continuous flotation, bubbles in the cylindrical barrel 4 carry coarse-grained minerals to continuously float upwards and are gathered to form a foam layer area 403, and when the height of the foam layer in the foam layer area 403 exceeds the upper end surface of the cylindrical barrel 4, flotation concentrate in the foam layer overflows out of the cylindrical barrel 4 and flows out of the concentrate discharge pipe 3 through the concentrate overflow groove 2.
Referring to fig. 1, in other embodiments, the three-phase mixing mineralization device includes a slurry stirring and conveying assembly, a gas supply assembly and a jet mineralization pipe 19, the slurry stirring and conveying assembly includes a slurry stirring barrel 15, a slurry inlet ball valve 16, a variable frequency slurry pump 17 and a slurry flowmeter 18 which are sequentially connected through a slurry pipe, the gas supply assembly includes an air compressor 14, an air inlet valve 13, a gas storage tank 12, a gas flow control valve 11, a gas flowmeter 10 and a pressure gauge 9 which are sequentially connected through a gas pipe, and the slurry pipe and the gas pipe are both communicated with the jet mineralization pipe 19.
In this embodiment, the ore slurry mixing tank 15 is added with coarse-grained minerals and a flotation reagent, and is stirred and mixed uniformly to generate an ore slurry mixture, the ore slurry mixture is fed into the jet mineralization pipe 19 under the action of the variable-frequency slurry pump 17, the area is suddenly reduced when the ore slurry passes through the jet mineralization pipe 19, the flow rate is rapidly increased, the ore slurry mixture sucks in compressed air under the negative pressure generated under the jet action of the jet mineralization pipe 19, and the compressed air is crushed and mixed into the ore slurry mixture to form jet ore slurry. Wherein, can control the frequency of opening of frequency conversion sediment stuff pump 17 according to the numerical value size that ore pulp flowmeter 18 shows, and then adjust the entering thick liquid flow of efflux mineralization pipe 19, be equipped with mineral feed inlet and flotation reagent feed inlet on the ore pulp agitator 15, come the aperture size of control gas flow governing valve 11 according to the numerical value size that gas flowmeter 10 and manometer 9 show, and then can adjust the inlet flow and the pressure size of efflux mineralization pipe 19.
Referring to fig. 1 and 2, the flotation device provided in the above embodiment works as follows:
a: firstly, closing a tailing discharge valve 8, starting an air compressor 14, opening an air inlet valve 13, inflating air into an air storage tank 12, adding coarse particle minerals and flotation reagents into an ore pulp stirring barrel 15, stirring and mixing uniformly to generate an ore pulp mixture.
b: opening a slurry inlet ball valve 16, starting a variable frequency slurry pump 17, pumping the slurry mixture into a jet mineralization pipe 19 through the variable frequency slurry pump 17, simultaneously adjusting a slurry flow meter 18 on a pipeline between the variable frequency slurry pump 17 and the jet mineralization pipe 19, adjusting the slurry inlet flow of the jet mineralization pipe 19, opening a gas flow adjusting valve 11 and a gas flow meter 10 on a pipeline between a gas storage tank 12 and the gas inlet end of the jet mineralization pipe 19, and further controlling the amount of gas entering the jet mineralization pipe 19.
c: when the ore pulp mixture with certain pressure passes through the jet mineralization pipe 19, the area is suddenly reduced, the flow rate is rapidly increased, the ore pulp mixture sucks compressed air under the negative pressure generated under the jet action of the jet mineralization pipe 19, and the compressed air is crushed and mixed into the ore pulp mixture to form gas-solid-liquid three-phase jet ore pulp after efficient collision and adhesion between particles and bubbles.
d: the jet pulp continuously descends to the three-phase mixed mineralizer through the pulp feeding pipe, and because the three-phase jet pulp has certain speed and pressure, when the three-phase mixed mineralizer is filled with the three-phase mixed mineralizer, the gas-liquid-solid three-phase jet pulp changes the movement direction, changes from vertical downward to vertical upward, and is sprayed from the pulp spraying holes 603 on the pulp distribution pipe 602.
e: mineral particles adhered to the bubbles continuously move upwards in the stirring sleeve 5, the whole cylindrical barrel 4 is gradually filled with ore pulp along with the progress of time, target mineral particles at the position above the upper edge of the stirring sleeve 5 are divided into two conditions, and the mineral particles with general hydrophobicity and a small amount of coarse-particle mineral falling from the foam layer are easy to fall off from the bubbles on the bubbles due to large particle size; and another part of mineral particles with better hydrophobicity continuously go upwards to enter the concentrate overflow trough 2 and are discharged from the concentrate overflow pipe to become concentrate.
f, because the flow velocity of the ore pulp on the three-phase mixing mineralization device is high, a small-range negative pressure is formed at the position, and when coarse-particle minerals falling from the outside of the stirring sleeve 5 move to the area between the cylindrical barrel 4 and the stirring sleeve 5, the coarse-particle minerals enter the stirring sleeve 5 under the action of the negative pressure to form ore pulp circulation.
And g, opening the tailing discharge valve 8 by a certain opening degree, and further controlling the height of the ore pulp liquid level in the cylindrical barrel 4. While gangue minerals not trapped by the air bubbles sink within the column and are ultimately discharged from the tailings discharge conduit 7 as tailings via the tailings underflow channel zone 401.
Application example 1
The test material was a copper sulphide ore. The ore is ground by a ball mill and then enters a cyclone for classification, and the obtained ore pulp with the particle size of about 150-800 mu m is used as an experimental ore feeding raw material, wherein the copper grade is 0.53%, and the proportion of the particle size fraction under 500 mu m is about 88%. Adding a pH regulator into the ore pulp to adjust the pH value of the ore pulp to 9.0, then adding collecting agents including butyl xanthate and butyl ammonium black, stirring and mixing the mixture, adding No. 2 oil foaming agents, fully mixing the mixture, feeding coarse particle flotation equipment with swirl and damping coupled fluidization from a raw ore feeding pipe for flotation, wherein overflow products are coarse concentrates, bottom flow is discharged through a tailing discharge pipe to form tailings, and the tailings are directly used as final tailings. The adding amount of the collecting agent relative to the raw ore is 200g/t of butyl xanthate, 100g/t of butyl ammonium melanophore, 20g/t of No. 2 oil, the pH regulator is sodium carbonate, and the flotation temperature is 20 ℃. The test results in 1.39% of the Cu grade of the rough concentrate, 91.27% of recovery rate, 0.07% of the Cu grade of the tailings, 65.20% of yield and only 8.73% of copper loss of the tailing part (see table 1).
Application example 2
The test material was some molybdenite. After being ground by a ball mill, the ore enters a cyclone for classification, and the obtained ore pulp with the particle size of about 150-1000 mu m is used as an experimental ore feeding raw material, wherein the molybdenum grade is 0.198%, and the proportion of the particle size fraction under 600 mu m is about 91%. Adding pH regulator into the ore pulp to regulate the pH value of the ore pulp to 8.0, adding kerosene as collecting agent, stirring and mixing, adding a pine oil foaming agent, fully mixing, feeding coarse particle flotation equipment with swirl and damping coupled fluidization from a raw ore feeding pipe for flotation, wherein overflow products are coarse concentrates, bottom flow is discharged through a tailing discharging pipe to form tailings, and the tailings are directly used as final tailings. The adding amount of the collecting agent relative to the raw ore is 60g/t, the foaming agent of the pine oil is 20g/t, the pH regulator is sodium carbonate, and the flotation temperature is 20 ℃. The test results show that the coarse concentrate Mo grade is 0.458%, the recovery rate is 93.91%, the tailing Mo grade is 0.020%, the yield is 59.40%, and the molybdenum loss of the tailing part is only 6.09% (see table 2).
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Claims (10)
1. A flotation device for enhanced recovery of coarse mineral particles, comprising:
the device comprises a columnar cylinder (4), wherein the interior of the columnar cylinder is divided into a tailing underflow groove area (401), an ore pulp circulation area (402) and a foam layer area (403) which are communicated in sequence from bottom to top, and a concentrate overflow groove (2) is arranged at the top of the columnar cylinder (4);
the stirring sleeve (5) is arranged in a pulp circulation zone (402) of the columnar cylinder (4), and the pulp circulation zone (402) is divided into two pulp flowing zones with opposite flowing directions through the stirring sleeve (5) which is penetrated up and down;
wherein the inner area of the stirring sleeve (5) is used as a first pulp flowing area, and the area between the stirring sleeve (5) and the cylindrical barrel (4) is used as a second pulp flowing area;
the three-phase ore pulp disperser (6) is arranged in the bottom of the stirring sleeve (5);
the three-phase mixed mineralization device is communicated with the three-phase ore pulp disperser (6) through an ore pulp feeding pipe (1);
the mineralized ore pulp is injected into the stirring sleeve (5) from an ore pulp injection hole (603) at the top of the three-phase ore pulp disperser (6), and a jet negative pressure for sucking the coarse-particle minerals at the bottom of the second ore pulp flowing area back to the stirring sleeve (5) to form ore pulp circulation is formed;
the spraying direction of the ore pulp spraying hole (603) is parallel to the axis of the stirring sleeve (5).
2. The flotation device of claim 1, wherein: the flow direction of the ore pulp in the ore pulp feeding pipe (1) is opposite to the flow direction of the ore pulp in the ore pulp jet hole (603).
3. The flotation device of claim 2, wherein: three-phase ore pulp deconcentrator (6) are in including center disk body (601) and even interval arrangement a plurality of ore pulp distributing pipes (602) on the periphery wall of center disk body (601), ore pulp distributing pipe (602) one end seals the setting, the other end with the inner chamber intercommunication of center disk body (601), every evenly distributed has on the roof of ore pulp distributing pipe (602) ore pulp jet orifice (603), ore pulp feeding pipe (1) with the inner chamber intercommunication of center disk body (601).
4. A flotation device according to claim 3, wherein: the ore pulp feeding pipe (1) is fed from the center of the top of the columnar cylinder (4), penetrates through the concentrate overflow trough (2), is inserted into the stirring sleeve (5) and is connected with the three-phase ore pulp disperser (6), and the axes of the stirring sleeve (5), the ore pulp feeding pipe (1) and the columnar cylinder (4) are overlapped.
5. A flotation device according to any one of claims 1 to 3, characterized in that: and a tailing discharge valve (8) is arranged at the bottom of the tailing underflow groove area (401).
6. The flotation device of claim 5, wherein: the tailing underflow groove area (401) is in an inverted cone shape, and the bottom end of the stirring sleeve (5) extends to the tailing underflow groove area (401).
7. A flotation device according to any one of claims 1 to 3, characterized in that: and a concentrate discharge pipe (3) is arranged on the concentrate overflow groove (2).
8. The flotation device of claim 7, wherein: the inner bottom surface of the concentrate overflow groove (2) is an inclined surface, and the concentrate discharge pipe (3) is arranged at the lowest end of the inclined surface.
9. A flotation device according to any one of claims 1 to 3, characterized in that: the three-phase mixing mineralizing device comprises an ore pulp stirring and conveying assembly, an air supply assembly and a jet mineralizing pipe (19);
the ore pulp stirring and conveying assembly comprises an ore pulp stirring barrel (15), an ore pulp inlet ball valve (16), a variable-frequency slurry pump (17) and an ore pulp flowmeter (18) which are sequentially connected through an ore pulp pipe, wherein a mineral feeding port and a flotation agent feeding port are formed in the ore pulp stirring barrel (15);
the gas supply assembly comprises an air compressor (14), an air inlet valve (13), a gas storage tank (12), a gas flow regulating valve (11), a gas flowmeter (10) and a pressure gauge (9) which are sequentially connected through a gas pipe, and the ore pulp pipe and the gas pipe are communicated with the jet mineralization pipe (19).
10. A flotation process for enhanced recovery of coarse minerals comprising:
mineralizing the mixed ore pulp by a three-phase mixed mineralizing device to form gas-solid-liquid three-phase jet ore pulp;
the jet flow ore pulp descends to a three-phase ore pulp disperser (6) through an ore pulp feeding pipe (1), when the three-phase ore pulp disperser (6) is filled with the jet flow ore pulp, the jet flow ore pulp changes the movement direction, and is injected into a stirring sleeve (5) from an ore pulp injection hole (603) at the top of the three-phase ore pulp disperser (6) to form jet flow negative pressure, and the injection direction of the ore pulp injection hole (603) is parallel to the axis of the stirring sleeve (5);
mineral particles adhered to the bubbles continuously go upwards in the stirring sleeve (5), enter a foam layer area (403) of the columnar cylinder body (4) for secondary enrichment, and enter the concentrate overflow trough (2) to become concentrate;
gangue minerals which are not captured by the bubbles sink in the cylindrical barrel (4) and finally enter a tailing underflow groove area (401) at the bottom of the cylindrical barrel (4) to become tailings;
in the flotation process, one part of coarse-grained minerals falling off from the bubbles enter an annular gap between the cylindrical barrel (4) and the stirring sleeve (5), and the other part of coarse-grained minerals enter the stirring sleeve (5); wherein the content of the first and second substances,
the coarse particle mineral entering the annular gap flows back to the stirring sleeve (5) from the bottom of the stirring sleeve (5) under the action of jet negative pressure to form ore pulp circulation, the coarse particle mineral entering the stirring sleeve (5) is subjected to countercurrent collision with the air bubbles to be secondarily adhered, and finally rises along with the air bubbles to enter a foam layer area (403).
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| CN202110537143.6A CN113198620B (en) | 2021-05-18 | 2021-05-18 | Flotation device and flotation method for enhancing recovery of coarse particle minerals |
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| CN113198620B (en) | 2022-07-19 |
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