CN112808466B

CN112808466B - Coarse particle high-concentration flotation column

Info

Publication number: CN112808466B
Application number: CN202110204031.9A
Authority: CN
Inventors: 张跃军; 吴峰; 韩登峰; 罗世瑶; 高轩; 张明
Original assignee: BGRIMM Machinery and Automation Technology Co Ltd
Current assignee: BGRIMM Machinery and Automation Technology Co Ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2022-09-27
Anticipated expiration: 2041-02-24
Also published as: CN112808466A

Abstract

The invention provides a coarse particle high-concentration flotation column, which comprises: the device comprises a cyclone group, a water replenishing system, a column body, an aerator and a liquid level control valve; the cyclone group is connected with the column, and the water replenishing system is arranged in the column and is arranged below an outlet of the cyclone group; the aerator is connected with the bottom of the column; the liquid level control valve is arranged on one side of the bottom of the column body. The invention can play the advantages of energy saving, consumption reduction, high enrichment ratio and small occupied area of the flotation column aiming at the flotation process of coarse particle minerals under the condition of high-concentration ore pulp.

Description

Coarse particle high-concentration flotation column

Technical Field

The invention relates to the technical field of flotation equipment, in particular to a coarse particle high-concentration flotation column.

Background

The improvement of the feeding granularity and the flotation concentration has important significance for improving the ore treatment capacity, saving energy and reducing consumption, but for conventional flotation equipment, the suitable feeding granularity is 10-100 um, the mass concentration of the ore pulp suitable for flotation is 25-35%, and if the ore pulp with larger specific gravity is treated, the concentration can be improved to a certain extent, but generally is not more than 45%; limited by the structure of conventional flotation equipment, too high flotation concentration and too coarse granularity lead to poor air dispersion effect and mineral suspension performance, reduce the collision probability of bubbles and particles, increase the falling probability of the particles from the bubbles and further deteriorate the flotation index.

In view of the limitations of flotation columns in terms of mineral particle size and pulp concentration, researchers have introduced the fluidization separation technique into flotation columns, and HydroFloat separators and Nova cell flotation columns have emerged.

The HydroFloat separator combines flotation and gravity separation, creates a staticized separation environment suitable for coarse particles, improves the recovery rate of coarse particle minerals, and mainly comprises an ore feeder, a foam tank, a cylindrical tank body and a conical tank body, an air-water mixed flow aerator and a liquid level control device. Ore pulp is fed from the upper part of the Hydrofloat, coarse-grained minerals are quickly concentrated into a fluidized bed layer in a conical column body section, a water-gas mixer is arranged at the middle upper part of the conical body, generated bubbles are dispersed through the fluidized layer and then rise, and target minerals collide with the rising bubbles in a column-shaped area and are brought to an overflow weir by the bubbles and then are discharged from a foam tank.

The Nova cell flotation column consists of a flotation column body, an ore gas mixed flow bubble generator, an ore feeder, a middling circulating pump line and an ore pulp pump. Part of middlings and fresh ore pulp are combined and then fed into the middling pipe, air is pressed into the top of the middlings to form bubbles, an ore air mixture flows upwards through the bottom of the flotation column, coarse-particle minerals form a fluidized layer, bottom flow is discharged from the middle lower portion of the flotation column, and foams are discharged from the upper foam tank.

The flotation equipment is pre-mixed with water or ore pulp (an ore pulp circulating pump needs to be arranged) through air, the air dispersion and the mineral suspension are enhanced to increase the collision chance of bubbles and particles, the control of the aeration quantity is limited by the water quantity and the ore pulp quantity pre-mixed with the air, the operation is not easy, the equipment structure is complex, the energy consumption is high, and the abrasion is large. Meanwhile, the requirement on feeding of the system is high, the pipeline is easy to block, and the process adaptability is relatively poor.

Disclosure of Invention

The invention aims to exert the advantages of energy conservation, consumption reduction and small occupied area of the flotation column, so that the flotation column is suitable for the flotation process of coarse-particle high-concentration ore pulp.

The invention provides a coarse particle high-concentration flotation column, which comprises: the device comprises a cyclone group, a water replenishing system, a column body and an aerator; the cyclone group is connected with the column, and the water replenishing system is arranged in the column and is arranged below an outlet of the cyclone group; the aerator is connected with the bottom of the column; the liquid level control valve is arranged on one side of the bottom of the column body; the column includes: the device comprises an outer cylinder, an inner cylinder and a foam collecting tank which are concentric, wherein an annular space between the outer cylinder and the inner cylinder is a flotation dynamic area, and the bottom of the outer cylinder is provided with an interface of an aerator and a liquid level control valve; the inner part of the inner cylinder is provided with an installation channel of the feeding pipe and the overflow pipe of the cyclone unit; the swirler is arranged in an annular space between the outer barrel and the inner barrel; the foam collecting tank is arranged at the top of the outer barrel.

Further, the bottom of the column body is provided with a support.

Further, the bottom of the column body is inclined to form an inclined bottom, and the liquid level control valve is arranged at the tail end of the inclined bottom.

Furthermore, the cyclone group comprises a plurality of cyclones which are uniformly distributed along the circumference of the cylinder.

Furthermore, a dispersion cone is arranged at a bottom flow port of the cyclone, and the dispersion cone is welded and fixed with an outlet of the cyclone by utilizing a steel plate.

Further, the water replenishing system comprises: the water supply device comprises a water supply pipe and a plurality of water supply pipes, wherein the water supply pipes are uniformly arranged on the water supply pipe, and the water supply pipes correspond to the cyclones one to one.

Furthermore, the moisturizing pipe is the annular, just moisturizing pipe mounted position is higher than the cylinder is followed on.

Further, the water feed pipe includes: the water replenishing pipe comprises a vertical section and an oblique bending section, wherein one end of the vertical section is communicated with the water replenishing pipe, and the other end of the vertical section is communicated with the oblique bending section.

Furthermore, the outlet of the inclined bending section is retracted, and the diameter of the outlet end is smaller than that of other parts.

Compared with the prior art, the invention has the beneficial effects that: the ore is fed by the height difference of the cyclone group, an ore pulp circulating pump of an equipment body is not required to be additionally arranged, and the device has the advantages of simple structure, low energy consumption and small occupied area; the concentration of the ore pulp is adjusted by the water replenishing system, mineral particles are dispersed, the mineral particles are not interfered with the aeration quantity provided by the aerator, and the control is easy. The invention can play the advantages of energy saving, consumption reduction, high enrichment ratio and small occupied area of the flotation column aiming at the flotation process of coarse particle minerals under the condition of high-concentration ore pulp.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a coarse particle high concentration flotation machine according to the present invention;

FIG. 2 is a top view of a coarse particle high concentration flotation machine according to the present invention;

FIG. 3 is a schematic view of a dispersion cone installation of the present invention;

FIG. 4 is a schematic view of a water replenishing assembly according to the present invention;

FIG. 5 is a front view of the column construction of the present invention;

FIG. 6 is a top view of a pillar structure according to the present invention;

fig. 7 is a schematic diagram of the working principle of a coarse particle high-concentration flotation column of the invention.

Description of reference numerals:

1: a cyclone group; 2: supplementing a water system; 3: a cylinder; 4: an inflator; 5: a liquid level control valve; 6: a dispersion cone; 7: a steel plate; 8: an annular tube; 9: a vertical section; 10: a skew bending section; 11: a foam collection tank; 12: an outer cylinder; 13: an inner barrel; 14: and (5) sloping the bottom.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present 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, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "coupled" are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 7, the present invention provides a coarse particle high concentration flotation column including: the device comprises a cyclone group 1, a water replenishing system 2, a column 3, an aerator 4 and a liquid level control valve 5. The cyclone group 1 is connected with the column body 3, the water replenishing system 2 is arranged in the column body 3 and is arranged below an outlet of the cyclone group 1, the aerator 4 is connected with the bottom of the column body 3, and the liquid level control valve 5 is arranged on one side of the bottom of the column body 3. The bottom of the column body 3 is provided with a support. The aerator 4 is only filled with high-pressure air, and the air supply pressure is 400 kPa and 600 kPa. The liquid level control valve 5 is arranged at a low position, and a pipe clamp valve or a cone valve is suggested to be adopted. The bottom of the column body 3 is inclined to form an inclined bottom 14, and the liquid level control valve 5 is arranged at the tail end of the inclined bottom 14.

As shown in fig. 2 and 3, the cyclone group 1 includes a plurality of cyclones uniformly distributed along the circumference of the cylindrical body 3. In this embodiment, preferably 4 cyclones are provided. The underflow port of each cyclone is provided with a dispersion cone 6, and the dispersion cones 6 are welded and fixed with the outlet of the cyclone by steel plates 7. The coarse particle high-concentration ore pulp forms rotational flow in the cyclone, and better disperses and flows out from the underflow port under the action of the dispersing cone 6.

As shown in fig. 6, the column 3 includes: concentric outer and

inner cylinders

12, 13 and a foam collection tank 11. A foam collecting tank 11 is provided on the top of the outer tub 12 for collecting the foam product. The annular space between the outer cylinder 12 and the inner cylinder 13 is the flotation kinetic zone. The bottom of the outer cylinder 12 is provided with an aerator 4 and a connector of a liquid level control valve. The inner part of the inner cylinder 13 is provided with a mounting channel of a feeding pipe and an overflow pipe of the cyclone group. The cyclone is arranged in the annular space between the outer and

inner barrels

12, 13.

As shown in fig. 4 and 5, the makeup water system 2 includes: water supply pipe 8 and a plurality of feed pipe, a plurality of feed pipe evenly set up on water supply pipe 8, and feed pipe and swirler one-to-one. The water replenishing pipe 8 is annular, and the installation position of the water replenishing pipe 8 is higher than the upper edge of the column body 3. The position of the annular water replenishing pipe 8 is higher than the upper edge of the cylinder 3, so that the phenomenon of blockage caused by entering of coarse particles can be effectively avoided. The feed pipe includes: vertical section 9 and oblique curved section 10, the one end and the moisturizing pipe 8 intercommunication of vertical section 9, the other end and oblique curved section 10 intercommunication. The outlet of the oblique bending section 10 is retracted, and the diameter of the outlet end is smaller than that of other parts. The outlet of the inclined bending section 10 is in a necking form so as to increase the outflow speed of the supplemented water and promote the dispersion of the supplemented water at the bottom of a dispersion cone 6 arranged at the bottom flow port of the cyclone unit 1.

The working principle of the invention is as follows: as shown in figure 7, the coarse particle (-200 meshes account for less than 10%) high concentration ore pulp (mass concentration is more than 50%) flows out from the underflow outlet of the cyclone group 1, and is dispersed in the annular area between the outer cylinder 12 and the inner cylinder 13 under the action of the cyclone and the dispersion cone 6 and then flows downwards, and when the clear water enters from the inlet of the water supplementing system 2 and flows upwards, the clear water is dispersed under the reflection action of the dispersion cone 6 at the outlet of the cyclone and meets the high concentration ore pulp from the underflow outlet of the cyclone, and the clear water and the high concentration ore pulp are fully mixed with each other, so that the coarse particle minerals are uniformly dispersed in the cross section. Meanwhile, high-pressure air is sprayed into the flotation column at high speed through a nozzle of the aerator 4 and then is cut into small bubbles, the small bubbles are in efficient countercurrent collision with descending mineral particles in the ascending process of the area formed by the outer cylinder 12 and the inner cylinder 13 to form mineralized bubbles, the mineralized bubbles are collected by the foam tank 11 to form foam products, and the particles which are not collided with the bubbles and attached to the mineralized bubbles are continuously discharged downwards through the liquid level control valve 5.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coarse particle high concentration flotation column comprising: the device comprises a cyclone set (1), a water replenishing system (2), a column body (3), an aerator (4) and a liquid level control valve (5); the cyclone group (1) is connected with the column body (3), and the water replenishing system (2) is arranged in the column body (3) and is arranged below an outlet of the cyclone group (1); the aerator (4) is connected with the bottom of the column body (3); the liquid level control valve (5) is arranged on one side of the bottom of the column body (3);

the column (3) comprises: the device comprises an outer cylinder (12), an inner cylinder (13) and a foam collecting tank (11), wherein the outer cylinder (12) and the inner cylinder (13) are concentric, an annular space between the outer cylinder (12) and the inner cylinder (13) is a flotation dynamic area, and the bottom of the outer cylinder (12) is provided with an interface of the aerator (4) and the liquid level control valve; the inner part of the inner cylinder (13) is provided with an installation channel of a feeding pipe and an overflow pipe of the cyclone unit (1); the swirler is arranged in an annular space between the outer barrel (12) and the inner barrel (13); the foam collecting tank is arranged at the top of the outer cylinder (12).

2. A flotation column for high concentration of coarse particles according to claim 1, characterized in that the bottom of the column body (3) is provided with a support.

3. A high concentration flotation column for coarse particles according to claim 1, characterized in that the bottom of the column (3) is inclined to form an inclined bottom (14), and the level control valve (5) is arranged at the end of the inclined bottom (14).

4. A high-concentration flotation column for coarse particles according to claim 1, characterized in that the cyclone group (1) comprises a plurality of cyclones distributed uniformly along the circumference of the column body (3).

5. The coarse particle high-concentration flotation column according to claim 4, characterized in that a dispersion cone (6) is arranged at the underflow opening of the cyclone, and the dispersion cone (6) is welded and fixed with the outlet of the cyclone by a steel plate (7).

6. A coarse particle high concentration flotation column according to claim 1, characterized in that the make-up water system (2) comprises: water supply pipe (8) and a plurality of feed pipe, a plurality of the feed pipe evenly sets up on water supply pipe (8), just the feed pipe with swirler one-to-one.

7. The flotation column for high concentration of coarse particles according to claim 6, wherein the water replenishing pipe (8) is annular, and the water replenishing pipe (8) is installed at a position higher than the upper edge of the column body (3).

8. The coarse particle high concentration flotation column according to claim 6, wherein the water feed pipe comprises: vertical section (9) and oblique curved section (10), the one end of vertical section (9) with moisturizing pipe (8) intercommunication, the other end with oblique curved section (10) intercommunication.

9. A flotation column for high concentration of coarse particles according to claim 8, characterized in that the outlet of the inclined curved section (10) is recessed and the diameter of the outlet end is smaller than the diameter of the rest of the section.