CN113457853B - Unpowered gas stirring type flotation device and flotation method - Google Patents

Abstract

The invention relates to the technical field of mineral processing, in particular to an unpowered gas stirring type flotation device and a flotation method, wherein the unpowered gas stirring type flotation device comprises a columnar barrel body and a stirring sleeve fixedly arranged in the columnar barrel body, and the unpowered gas stirring type flotation device also comprises: the concentrate overflow groove is fixedly arranged on the outer side of the top end of the cylindrical barrel body, and one side of the bottom end of the concentrate overflow groove is communicated with a concentrate discharge groove; the raw ore feeding pipe is arranged in the columnar barrel, one end of the raw ore feeding pipe is fixedly communicated with a stirring mineralization mechanism, and the raw ore feeding pipe is uniformly distributed and communicated with a feeding porous distributor at the bottom of one end of the stirring sleeve; the micropore ceramic tube sector distributor is fixedly arranged in the bottom end of the stirring sleeve and is fixedly communicated with an inflating mechanism; the invention can realize that coarse ore pulp particles with common hydrophobicity undergo secondary collision and adhesion with bubbles through multiple self-generated cycles, thereby improving the capture probability of the coarse particles and further improving the overall recovery rate.

Description

Unpowered gas stirring type flotation device and flotation method

Technical Field

The invention relates to the technical field of mineral processing, in particular to an unpowered gas stirring type flotation device and a flotation method.

Background

Along with the rapid development of economic society of China, mineral resources are exploited in large quantities, and the resources have the characteristics of poverty, fineness and impurity, so that higher requirements are put forward on mineral separation processes and equipment. Taking the field of non-ferrous metal ore separation as an example, research statistics shows that the power consumption of ore grinding accounts for 45% -55% of the total power consumption of a dressing plant, the flotation granularity of minerals is improved, and the power consumption of ore grinding can be greatly reduced. However, the conventional coarse particle mineral flotation equipment has a limited upper limit on the particle size of the processed minerals, and the low dissociation coarse particles have a high probability of falling off in the hydrodynamic environment of the conventional coarse particle flotation equipment.

If the upper limit of the optimal inserted-granularity of ores with coarse mineral-embedded granularity can be improved, so that the ores are floated under the condition of coarse grinding, the power consumption of grinding can be reduced, the metal loss caused by over-crushing of the ores can be prevented, and the dehydration efficiency of the concentrate can be improved.

The analysis and research of domestic and foreign scholars find that the high-speed rotation of an impeller in a mechanical stirring type flotation machine can cause the strong turbulent motion of ore pulp, so that the adhesion of particles and bubbles is hindered, and the bubbles are further fallen off, which is the root cause that the coarse grain flotation is difficult to carry out, but the upper limit of the flotation particle size is difficult to further improve due to the unstable hydraulic environment of the mechanical stirring type flotation.

Therefore, it is necessary to invent an unpowered gas stirring type flotation device and a flotation method.

Disclosure of Invention

Therefore, the invention provides an unpowered gas stirring type flotation device and a flotation method, the mineral slurry descending in a stirring sleeve and the ascending bubbles are subjected to counter-current collision mineralization to enable particles to be adhered to the bubbles and move upwards, mineral particles with general hydrophobicity fall from coarse particle minerals falling from a foam layer, the bubbles and the bubbles adhered to the particles generated by a microporous ceramic tube fan-shaped distributor move upwards, a small-range cavity negative pressure area is formed in an area between the bottom end of a columnar barrel body and the bottom end of the stirring sleeve, the particles entering the cavity negative pressure area enter the stirring sleeve to form slurry circulation, so that the problem that the high-speed rotation of an impeller in a mechanical stirring type flotation device can cause the strong turbulent motion of the slurry, thereby preventing the adhesion of the particles and the bubbles and further causing the falling of the bubbles, namely the root cause that the coarse particle flotation is difficult to be carried out is solved, however, the upper limit of the flotation particle size is difficult to further increase due to the unstable hydraulic environment of the mechanical agitation type flotation.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides an unpowered gas stirring formula flotation device, includes cylindrical barrel body and the stirring sleeve of fixed mounting in the cylindrical barrel body, still includes: the concentrate overflow groove is fixedly arranged on the outer side of the top end of the cylindrical barrel body and used for quickly discharging flotation concentrate particles, the bottom end of the concentrate overflow groove is provided with an inclined surface, and the concentrate overflow groove is communicated with a concentrate discharge groove which is used for discharging flotation concentrate particles in the concentrate overflow groove along the bottom of the inclined surface so as to avoid blockage caused by accumulation of the flotation concentrate particles in the concentrate overflow groove;

the raw ore feeding pipe is arranged in the columnar barrel body and used for conveying pulp ore, one end, far away from the columnar barrel body, of the raw ore feeding pipe is fixedly communicated with a stirring and mineralizing mechanism used for uniformly stirring and mixing the pulp ore and a flotation reagent, one end, far away from the stirring and mineralizing mechanism, of the raw ore feeding pipe is obliquely arranged in the top end of the stirring sleeve, and feeding porous distributors used for downwards discharging the pulp ore are uniformly and communicated with the bottom of one end, far away from the stirring and mineralizing mechanism, of the raw ore feeding pipe; and the micropore ceramic tube fan-shaped distributor is fixedly installed in the bottom end of the stirring sleeve and used for generating a large amount of micro bubbles and uniformly discharging the bubbles upwards so as to realize the countercurrent collision of ore pulp and the bubbles, and the micropore ceramic tube fan-shaped distributor is provided with an inflation mechanism used for inflating the micropore ceramic tube fan-shaped distributor through the fixed communication of the air supply pipe.

Preferably, the angle of the inclined plane at the bottom end of the concentrate overflow groove is set to be 50-75 degrees, the raw ore feeding pipe is arranged to be tightly attached to the inner wall of the cylindrical barrel body, and the inclination angle of one end, away from the stirring and mineralizing mechanism, of the raw ore feeding pipe is set to be 5-8 degrees.

Preferably, the bottom end of the cylindrical barrel body is internally provided with a cone, the angle of the cone at the bottom end of the cylindrical barrel body is set to be 75-80 degrees, the middle part of the bottom end of the cylindrical barrel body is fixedly communicated with a tailing discharging pipe, and a tailing discharging valve is fixedly arranged on the tailing discharging pipe.

Preferably, micron-sized small holes are uniformly distributed and communicated at the top ends of the microporous ceramic tube fan-shaped distributors, the diameters of the micron-sized small holes are 5-200 mu m, and the microporous ceramic tube fan-shaped distributors are in a six-leaf fan shape or a four-leaf fan shape.

Preferably, the inflation mechanism includes the gas holder, the top of gas holder is close to the fixed intercommunication in one side of cylindrical staving and is provided with the third pipe, the one end that the gas holder was kept away from to the third pipe is with the fixed intercommunication in one end that the fan-shaped distributor of micropore ceramic pipe was kept away from to the air feed pipe, the one side bottom that the third pipe was kept away from to the gas holder is provided with the air compressor machine through the fixed intercommunication of second pipe.

Preferably, the second guide pipe is fixedly provided with an air inlet valve, and the third guide pipe is fixedly provided with a pressure gauge, a gas flowmeter and a gas flow regulating valve.

Preferably, the stirring and mineralizing mechanism comprises a stirring barrel body, a stirring shaft is fixedly mounted in the middle of the top end of the stirring barrel body, stirring blades are symmetrically and fixedly mounted on two sides of the bottom end of the stirring shaft, a stirring motor is connected to the top end of the stirring shaft in a transmission manner, the stirring motor is fixedly mounted on the top end of the stirring barrel body, and a suspended medicament adding pipe is fixedly communicated with the top end of one side of the stirring barrel body.

Preferably, a stirring sleeve is slidably sleeved on the stirring shaft, a stirring feeding distributor is fixedly mounted at the bottom end of the stirring sleeve, the top end of the stirring sleeve is fixedly mounted at the top end of the stirring barrel body, one side, far away from the suspended medicament adding pipe, of the top end of the stirring sleeve is fixedly communicated with a stirring barrel feeding pipe, and one end, far away from the stirring sleeve, of the stirring barrel feeding pipe is arranged outside the stirring barrel body; the bottom end of the stirring barrel body is fixedly communicated with a raw ore feeding pipe through a first conduit; and a pulp inlet ball valve is fixedly arranged on the first conduit.

Preferably, the stirring feed distributor is sleeved on the stirring shaft, and the stirring feed distributor is rotatably connected with the stirring shaft.

An unpowered gas stirring type flotation method comprises the following steps:

s1, placing the ore pulp and the flotation reagent into a stirring and mineralizing mechanism, uniformly mixing the ore pulp and the flotation reagent by the stirring and mineralizing mechanism, and conveying the mixture of the ore pulp and the flotation reagent into a feeding porous distributor;

s2, compressing the air by an inflating mechanism and conveying the air into the microporous ceramic tube fan-shaped distributor;

s3, enabling the fan-shaped micropore ceramic tube distributor to generate bubbles flowing upwards, enabling the porous feeding distributor to spray ore pulp downwards, enabling the ore pulp and the bubbles to generate countercurrent collision, enabling an area between the fan-shaped micropore ceramic tube distributor and the bottom end of the cylindrical barrel body to form a negative pressure area, and enabling mineral particles with general hydrophobicity to enter the stirring sleeve through the negative pressure area and adhere to the bubbles again.

The invention has the beneficial effects that:

according to the invention, the descending ore pulp and the ascending bubbles in the stirring sleeve are subjected to countercurrent collision mineralization, so that particles are adhered to the bubbles and move upwards, mineral particles with general hydrophobicity fall off from coarse particle minerals falling from a foam layer, the bubbles and bubbles generated by the microporous ceramic tube fan-shaped distributor are adhered to the particles and move upwards, a cavity negative pressure area is formed in an area between the bottom end of the cylindrical barrel body and the bottom end of the stirring sleeve, the particles entering the cavity negative pressure area enter the stirring sleeve to form ore pulp circulation, so that the coarse particles of the ore pulp with general hydrophobicity falling in the area outside the stirring sleeve are subjected to secondary collision and adhesion with the bubbles through multiple self-generated circulation, the coarse particle capture probability is improved, and the overall recovery rate is improved.

Drawings

FIG. 1 is a schematic view of a partial structure of an unpowered gas stirring type flotation device provided by the invention;

FIG. 2 is a structural diagram of a stirring and mineralizing mechanism provided by the present invention;

FIG. 3 is a top view of a six-bladed fan-shaped distribution disk of a microporous ceramic tube fan-shaped distributor according to the present invention;

fig. 4 is a top view of a four-bladed fan tray of a microporous ceramic tube fan distributor according to the present invention.

In the figure: 1-a first conduit, 2-a slurry inlet ball valve, 3-a stirring mineralization mechanism, 31-a stirring barrel body, 32-a stirring shaft, 33-a stirring feeding distributor, 34-a stirring blade, 35-a stirring motor, 36-a suspending agent adding pipe, 37-a stirring barrel feeding pipe, 38-a stirring sleeve, 4-a columnar barrel body, 5-an aeration mechanism, 51-an air compressor, 52-an air storage tank, 53-a pressure gauge, 54-an air flow meter, 55-an air flow regulating valve, 56-an air inlet valve, 57-a second conduit, 58-a third conduit, 6-a tailing discharging valve, 7-a concentrate overflow trough, 8-an air supply pipe, 9-a feeding porous distributor, 10-a microporous ceramic pipe sector distributor, 11-a raw ore feeding pipe, 12-stirring sleeve, 13-tailing discharging pipe and 14-concentrate discharging groove.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Referring to the attached drawings 1-4, the invention provides an unpowered gas stirring type flotation device, which comprises a cylindrical barrel body 4 and a stirring sleeve 12 fixedly arranged in the cylindrical barrel body 4, and further comprises:

the concentrate overflow groove 7 is fixedly arranged on the outer side of the top end of the cylindrical barrel body 4 and used for quickly discharging flotation concentrate particles, the bottom end of the concentrate overflow groove 7 is provided with an inclined surface, and the concentrate overflow groove 7 is communicated with a concentrate discharge groove 14 which is used for discharging flotation concentrate particles in the concentrate overflow groove 7 so as to avoid blockage caused by accumulation of the flotation concentrate particles in the concentrate overflow groove 7;

the raw ore feeding pipe 11 is arranged in the columnar barrel body 4 and used for conveying pulp ore, one end, far away from the columnar barrel body 4, of the raw ore feeding pipe 11 is fixedly communicated with a stirring and mineralizing mechanism 3 used for uniformly stirring and mixing the pulp and a flotation reagent, one end, far away from the stirring and mineralizing mechanism 3, of the raw ore feeding pipe 11 is obliquely arranged in the top end of a stirring sleeve 12, and feeding porous distributors 9 used for downwards discharging the pulp are uniformly and communicated with the bottom of one end, far away from the stirring and mineralizing mechanism 3, of the raw ore feeding pipe 11; and the micropore ceramic tube fan-shaped distributor 10 is fixedly arranged in the bottom end of the stirring sleeve 12 and used for generating a large amount of micro bubbles and uniformly discharging the bubbles upwards so as to realize the countercurrent collision of ore pulp and the bubbles, and the micropore ceramic tube fan-shaped distributor 10 is fixedly communicated with an inflation mechanism 5 used for inflating the micropore ceramic tube fan-shaped distributor 10 through an air supply pipe 8.

Further, the angle of the inclined plane of the bottom end of the concentrate overflow trough 7 is set to be 50-75 degrees, the raw ore feeding pipe 11 is arranged to be tightly attached to the inner wall of the cylindrical barrel body 4, the inclination angle of one end, far away from the stirring and mineralizing mechanism 3, of the raw ore feeding pipe 11 is set to be 5-8 degrees, and specifically, the inclination angle of the bottom end of the concentrate overflow trough 7 is set to be 50-75 degrees, so that the concentrate particles can better slide into the concentrate discharge trough 14 conveniently.

Further, set up to the toper in the bottom of column staving 4, the conical angle in 4 bottom ends of column staving sets up to 75 degrees ~ 80 degrees, the fixed intercommunication in the bottom middle part of column staving 4 is provided with the tailing and arranges material pipe 13, fixed mounting has tailing blow-off valve 6 on the tailing discharges the material pipe 13, and is concrete, it makes tailing blow-off valve 6 have certain aperture to open tailing blow-off valve 13, and then the height of the interior ore pulp liquid level of control flotation device column staving 4, and the gangue mineral that does not caught by the bubble descends and finally discharges through tailing blow-off pipe 13 and becomes the tailing.

Furthermore, micron-sized small holes are uniformly distributed and communicated at the top end of the microporous ceramic tube fan-shaped distributor 10, the diameter of the micron-sized small holes is 5-200 μm, and the shape of the microporous ceramic tube fan-shaped distributor 10 is a six-leaf fan shape or a four-leaf fan shape.

Further, the inflating mechanism 5 comprises an air storage tank 52, a third guide pipe 58 is fixedly and communicatively arranged on one side, close to the cylindrical barrel body 4, of the top end of the air storage tank 52, one end, far away from the air storage tank 52, of the third guide pipe 58 is fixedly and communicatively connected with one end, far away from the microporous ceramic pipe sector distributor 10, of the air supply pipe 8, and an air compressor 51 is fixedly and communicatively arranged at the bottom end, far away from the third guide pipe 58, of one side of the air storage tank 52 through a second guide pipe 57.

Further, an air inlet valve 56 is fixedly installed on the second conduit 57, a pressure gauge 53, a gas flow meter 54 and a gas flow regulating valve 55 are fixedly installed on the third conduit 58, specifically, the air compressor 51 is started, the air inlet valve 56 is opened, the air storage tank 52 is inflated, the gas flow meter 54 and the gas flow regulating valve 55 on the third conduit 58 are opened, further, the air inlet flow and the pressure of the third conduit 58 are controlled, and compressed air enters the microporous ceramic tube sector distributor 10 through the third conduits 58 and 8.

Further, stirring mineralize mechanism 3 includes stirring barrel body 31, stirring barrel body 31's top middle part fixed mounting has (mixing) shaft 32, stirring shaft 32's bottom bilateral symmetry fixed mounting has stirring paddle leaf 34, stirring shaft 32's top transmission is connected with agitator motor 35, agitator motor 35 fixed mounting is on stirring barrel body 31's top, the fixed intercommunication in one side top of stirring barrel body 31 is provided with suspension medicament interpolation pipe 36, concretely, start agitator motor 35, agitator motor 35 rotates and is (mixing) shaft 32 and stirring paddle leaf 34 rotate promptly, stirring paddle leaf 34 rotates and can make ore pulp and medicament fully mixing, the stirring paddle rotational speed can be adjusted to certain rotational speed according to the concentration of ore pulp and can make each component misce bene of coarse coal slime through the stirring.

Further, a stirring sleeve 38 is slidably sleeved on the stirring shaft 32, a stirring feeding distributor 33 is fixedly installed at the bottom end of the stirring sleeve 38, the top end of the stirring sleeve 38 is fixedly installed at the top end of the stirring barrel body 31, a stirring barrel feeding pipe 37 is fixedly communicated with one side, away from the suspended chemical adding pipe 36, of the top end of the stirring sleeve 38, and one end, away from the stirring sleeve 38, of the stirring barrel feeding pipe 37 is arranged outside the stirring barrel body 31; the bottom end of the stirring barrel body 31 is fixedly communicated with a raw ore feeding pipe 11 through a first conduit 1; the first conduit 1 is fixedly provided with a pulp inlet ball valve 2.

Further, the stirring feed distributor 33 is sleeved on the stirring shaft 32, and the stirring feed distributor 33 is rotatably connected with the stirring shaft 32.

The using process of the invention is as follows: ore pulp enters the stirring barrel body 31 through the stirring barrel feeding pipe 37, the stirring sleeve 38 and the stirring feeding distributor 33 in sequence, a certain amount and proportion of flotation reagents are added through the suspension reagent adding pipe 36, the stirring motor 35 is started, the stirring motor 35 rotates, namely the stirring shaft 32 and the stirring blades 34 rotate, the stirring blades 34 rotate to enable the ore pulp and the reagents to be fully mixed, the rotating speed of the stirring blades can be adjusted to a certain rotating speed according to the concentration of the ore pulp, all components of coarse coal slime are uniformly mixed through stirring, the stirring sleeve 12 is closed, the tailing discharging pipe 13 is opened, mineralized and uniformly mixed ore pulp enters the raw ore feeding pipe 11 from the first conduit 1, the mineralized and uniformly mixed ore pulp is sprayed into the cylindrical barrel body 4 through the feeding porous distributor 9 and then enters the raw ore feeding pipe, the air compressor 51 is started, the air inlet valve 56 is opened, air is inflated into the air storage tank 52, the air flow meter 54 and the air flow regulating valve 55 on the third conduit 58 are opened, further controlling the air inlet flow and pressure of the third conduit 58, the compressed air enters the microporous ceramic tube fan-shaped distributor 10 through the third conduit 58 and the air supply pipe 8, a large amount of micro bubbles are generated through micron-sized pores in the microporous ceramic tube fan-shaped distributor 10, the descending ore pulp in the ore pulp tank 4 and the ascending bubbles generate countercurrent collision, the mineral particles and the bubbles are mineralized for the first time, the mineral particles adhered to the bubbles continue to ascend in the stirring sleeve 12, the ore pulp gradually fills the whole cylindrical barrel body 4 along with the time, the target mineral particles in the area above the upper edge of the stirring sleeve 12 are divided into two conditions, the mineral particles with general hydrophobicity and a small amount of coarse-particle minerals falling from the foam layer are easy to fall off from the bubbles due to large particle size, and the other part of the mineral particles with good hydrophobicity continue to ascend, enter the concentrate overflow groove 7 and are discharged from the concentrate discharge groove 14 to form a concentrate, because the bubbles and bubble adhesion particles generated by the microporous ceramic tube fan-shaped distributor 10 move upwards, a small-range cavity negative pressure is formed at the position, when coarse-particle minerals falling off from the outside of the stirring sleeve 12 move to the area between the bottom end of the cylindrical barrel body 4 and the bottom end of the stirring sleeve 12, the coarse-particle minerals enter the stirring sleeve 12 due to the action of the negative pressure to form ore pulp circulation, the tailing discharge valve 6 is opened to enable the tailing discharge pipe 13 to have a certain opening degree, and then the height of the liquid level of the ore pulp in the cylindrical barrel body 4 of the flotation device is controlled, and gangue minerals which are not captured by the bubbles fall in the cylindrical barrel body 4 and are finally discharged through the tailing discharge pipe 13 to form tailings.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides an unpowered gas stirring formula flotation device, includes cylindrical barrel body (4) and fixed mounting stirring sleeve (12) in cylindrical barrel body (4), its characterized in that still includes:

the concentrate overflow groove (7) is fixedly arranged on the outer side of the top end of the cylindrical barrel body (4) and used for quickly discharging flotation concentrate particles, the bottom end of the concentrate overflow groove (7) is provided with an inclined surface, and the concentrate overflow groove (7) is communicated with a concentrate discharge groove (14) which is used for discharging flotation concentrate particles in the concentrate overflow groove (7) along the bottom of the inclined surface so as to avoid blockage caused by accumulation of the flotation concentrate particles in the concentrate overflow groove (7);

the raw ore feeding pipe (11) is arranged in the columnar barrel body (4) and used for conveying pulp ore, the fixed communication of one end of the raw ore feeding pipe (11) far away from the columnar barrel body (4) is provided with a stirring mineralization mechanism (3) used for uniformly stirring and mixing the pulp and the flotation agent, the stirring mineralization mechanism (3) comprises a stirring barrel body (31), the middle of the top end of the stirring barrel body (31) is fixedly provided with a stirring shaft (32), the two symmetrical sides of the bottom end of the stirring shaft (32) are fixedly provided with stirring blades (34), the top end of the stirring shaft (32) is connected with a stirring motor (35) in a transmission manner, the stirring motor (35) is fixedly arranged on the top end of the stirring barrel body (31), the top end of one side of the stirring barrel body (31) is fixedly communicated with a suspension agent adding pipe (36), and a stirring sleeve (38) is sleeved on the stirring shaft (32) in a sliding manner, a stirring feeding distributor (33) is fixedly installed at the bottom end of the stirring sleeve (38), the top end of the stirring sleeve (38) is fixedly installed at the top end of the stirring barrel body (31), a stirring barrel feeding pipe (37) is fixedly communicated with one side, far away from the suspended medicament adding pipe (36), of the top end of the stirring sleeve (38), and one end, far away from the stirring sleeve (38), of the stirring barrel feeding pipe (37) is arranged outside the stirring barrel body (31); the bottom end of the stirring barrel body (31) is fixedly communicated with a raw ore feeding pipe (11) through a first conduit (1); the pulp inlet ball valve (2) is fixedly arranged on the first guide pipe (1), one end, far away from the stirring and mineralizing mechanism (3), of the raw ore feeding pipe (11) is obliquely arranged in the top end of the stirring sleeve (12), and the raw ore feeding pipe (11) is uniformly distributed and communicated with a feeding porous distributor (9) used for discharging ore pulp downwards, and is arranged at the bottom of one end of the stirring sleeve (12); and

fixed mounting is used for producing a large amount of micro-bubbles and evenly upwards discharges the bubble in order to realize that ore pulp and bubble take place against the current fan-shaped distributor of micropore ceramic pipe (10) of collision in order to realize in stirring sleeve (12) bottom, fan-shaped distributor of micropore ceramic pipe (10) are provided with through giving trachea (8) fixed intercommunication and are used for aerifing mechanism (5) in fan-shaped distributor of micropore ceramic pipe (10), because bubble and bubble that fan-shaped distributor of micropore ceramic pipe produced adhere the granule upward movement, the region between the bottom of column staving and the stirring sleeve bottom can form the hole negative pressure region, and the granule that gets into the hole negative pressure region can get into the inside ore pulp circulation that forms of stirring sleeve.

2. An unpowered gas agitation flotation device as set forth in claim 1 wherein: the novel mine tailing discharging device is characterized in that a conical shape is arranged in the bottom end of the columnar barrel body (4), the conical angle of the bottom end of the columnar barrel body (4) is set to be 75-80 degrees, a tailing discharging pipe (13) is fixedly communicated with the middle of the bottom end of the columnar barrel body (4), and a tailing discharging valve (6) is fixedly mounted on the tailing discharging pipe (13).

3. An unpowered gas agitation flotation device according to claim 1 wherein: micron-sized small holes are uniformly distributed and communicated at the top end of the microporous ceramic tube fan-shaped distributor (10), the diameter of each micron-sized small hole is 5-200 mu m, and the shape of the microporous ceramic tube fan-shaped distributor (10) is a six-leaf fan shape or a four-leaf fan shape.

4. An unpowered gas agitation flotation device as set forth in claim 1 wherein: aerify mechanism (5) and include gas holder (52), the top of gas holder (52) is close to the fixed intercommunication in one side of cylindrical staving (4) and is provided with third pipe (58), the fixed intercommunication in one end that microporous ceramic pipe fan-shaped distributor (10) were kept away from in one end that gas holder (52) were kept away from in third pipe (58) and for trachea (8), one side bottom that third pipe (58) were kept away from in gas holder (52) is provided with air compressor machine (51) through second pipe (57) fixed intercommunication.

5. An unpowered gas agitation flotation device according to claim 4 wherein: the angle of the inclined plane at the bottom end of the concentrate overflow groove (7) is set to be 50-75 degrees, the raw ore feeding pipe (11) is tightly attached to the inner wall of the cylindrical barrel body (4), and the inclination angle of one end, far away from the stirring and mineralizing mechanism (3), of the raw ore feeding pipe (11) is set to be 5-8 degrees.

6. An unpowered gas agitation flotation device according to claim 4 wherein: an air inlet valve (56) is fixedly mounted on the second guide pipe (57), and a pressure gauge (53), a gas flowmeter (54) and a gas flow regulating valve (55) are fixedly mounted on the third guide pipe (58).

7. An unpowered gas agitation flotation device according to claim 6 wherein: stirring feed distributor (33) cover is established on (mixing) shaft (32), stirring feed distributor (33) rotates with (mixing) shaft (32) and is connected.

8. A flotation method based on the unpowered gas stirring type flotation device as set forth in any one of claims 1 to 7, characterized in that: the method comprises the following steps:

s1, placing the ore pulp and the flotation reagent into a stirring and mineralizing mechanism, uniformly mixing the ore pulp and the flotation reagent by the stirring and mineralizing mechanism, and conveying the mixture of the ore pulp and the flotation reagent into a feeding porous distributor;

s2, compressing the air through an inflating mechanism and conveying the air into the microporous ceramic tube fan-shaped distributor;

s3, enabling the fan-shaped micropore ceramic tube distributor to generate bubbles flowing upwards, enabling the porous feeding distributor to spray ore pulp downwards, enabling the ore pulp and the bubbles to generate countercurrent collision, enabling an area between the fan-shaped micropore ceramic tube distributor and the bottom end of the cylindrical barrel body to form a negative pressure area, and enabling mineral particles with general hydrophobicity to enter the stirring sleeve through the negative pressure area and adhere to the bubbles again.

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