WO2013113253A1 - Energy-saving axial-flow microbubble flotation cell - Google Patents

Description

 Energy-saving axial flow microbubble flotation cell

Technical field

The energy-saving axial flow microbubble flotation tank belongs to the field of mineral processing flotation technology, and is used for the flotation separation process of metal minerals and non-metal minerals, and can also be used for the flotation separation process of coal selection.

Background technique

Flotation technology is one of the most commonly used techniques in mineral processing technology and is widely used in global mineral processing technology. Flotation technology is based on the difference in surface properties between mineral particles and gangue particles. After hydrophobic treatment of the surface of gangue or mineral particles, use The buoyancy of the bubbles floats the particles of the mineral or gangue to separate the gangue from the mineral. Flotation tanks have been the focus of research on flotation processes and have been the focus of research by global mineral processing technicians.

There are three types of flotation equipment. The first one is mechanical agitation or suction flotation tank, which is the traditional flotation tank. This flotation tank is the mainstream of flotation equipment, and 90% of the world's concentrators still use it. This type of flotation cell is due to the flotation cell In the flotation cell used in series, the operation is easy to grasp after the process is set, and the equipment manufacturers are relatively inexpensive. Although there are many patents for this type of equipment, the mainstream structure is still based on the technology of the Beijing Research Institute of Mining and Metallurgy, Beijing Research Institute of Mining and Metallurgy. The patents CN87102140, CN87103290, 93118179.8, 94100667.0, and 94218361.4 on the traditional flotation cell basically represent the technical level of the traditional flotation cell, which requires the power device to drive the rotor to operate, mixing the slurry with the three-phase of the bubble. The slurry is sucked in, and then sheared and mixed with the filled air bubbles to complete the mineral mineralization process. The conversion rate of the kinetic energy of the slurry structure is very low, resulting in high power consumption of the equipment, and the charged air bubbles are cut by the rotor. Cut and diffuse, the bubbles are difficult to disperse well, waste a lot of compressed air, and also bring about an increase in energy consumption; the second is an inflatable flotation column, which converts the flotation function from horizontal to upper Placement, greatly shortening the beneficiation process, but because the flotation column is a tank to complete the entire beneficiation process, it can only be applied to the simple flotation process such as slime selection, not suitable for the flotation of complex metal minerals. , Flotation column technology mainly to China University of Mining and Technology 97236893.0 The double-swirl static microbubble flotation column and the Central South University 01145542.X are technical representatives; the third is the short column microbubble flotation cell. The technical prototype of this flotation cell is derived from the venturi invented by Australian professor James in 1984. Pipeline inhalation mineralization flotation tank, Tianzhuang Coal Washing Plant 00207259.5, 02234471.3 patent developed this technology into microbubble rapid flotation technology, which improved the efficiency of the use of such flotation tank, Sun Xiaoyu 201020167495.4 Microbubble fast flotation integration mechanism, 201020108249.1 A fast flotation integrated system develops the technology into an integrated technology, broadening the application field of the technology, Ren Yi 201020177313.1 Efficient self-circulating flotation cell, 201020167521.3 tube bundle micropore bubble mixer, comprehensively improve the efficiency of mineral mineralization, making the short column microbubble flotation technology more and more perfect.

The above three flotation technologies each have their own advantages. The first conventional mechanically agitated and inflated flotation cell has the advantage of a series process, which is relatively easy to operate. The disadvantage is that the power consumption is too high; the advantage of the second flotation column is that Simple equipment investment, the disadvantage is limited adaptability The third short-column microbubble flotation cell has the advantages of high efficiency and low power consumption. The disadvantage is that the current technical recognition of the industry is not enough, and the difficulty of technology promotion is relatively large. The energy-saving axial flow microbubble flotation tank provided by the invention combines the characteristics of the mineralization mineralization technology of the short column microbubble flotation tank with high efficiency, rapidity and energy saving, and the traditional flotation tank technology, and can cooperate with most of the current flotation processes. The combination of the patent technology is widely used; the invention adopts the slurry axial circulation technology to maximize the efficiency of the pump, obtain the ideal slurry circulation volume with the minimum electric energy, and the same volume of the groove type and the traditional flotation tank. Compared with electricity consumption, it can save more than 80%; the mineralization process of minerals uses microbubble mineralization and rapid flotation technology, which enables fine bubbles to fully combine with mineral particles, greatly improving the efficiency of flotation, and the same volume of groove type Compared with the traditional flotation tank, the efficiency is more than doubled; the trough type of the invention is completely suitable for the traditional mechanical stirring flotation tank, and can be energy-saving technical transformation of a large number of high-energy conventional flotation tanks, which is a traditional flotation tank. Update technology.

Summary of the invention

The energy-saving axial flow microbubble flotation tank of the invention is invented for the energy-saving reformation of the conventional flotation tank, and the invention is fully applicable to the conventional flotation tank technology which is currently used in large quantities. The invention adopts the slurry axial circulation technology, which can maximize the efficiency of the pump and use the most The small electric energy obtains the ideal slurry circulation volume, and the same volume of the trough type can save more than 80% of the electricity consumption compared with the traditional flotation trough; the mineral mineralization process uses the microbubble mineralization fast flotation technology, so that the fine bubbles can Fully combined with mineral particles, greatly improving the efficiency of flotation, the tank volume of the same volume is more than doubled compared with the traditional flotation tank; the trough type of the invention is completely suitable for the traditional mechanical stirring flotation tank, and can be There are a large number of high-energy conventional flotation cells for energy-saving technical transformation, which is a new generation technology of traditional flotation cells.

 The object of the invention is achieved by the following technical solutions:

The energy-saving axial flow microbubble flotation tank of the invention is composed of a tank body, a power device, a transmission shaft, an axial flow pump, an intake pipe, an intake branch pipe, a foam outlet, and a plurality of mineralizer groups; the mineralizer group is fed The pipe, the mineralizer, the mineralized pipe and the release head are composed; the feed pipe of each mineralizer group is connected with the discharge port of the axial flow pump, the intake pipe is connected with the intake branch pipe, the intake branch pipe and the mineralization The mineralizers in the group are connected, the feed tubes, mineralizers, mineralization tubes and release heads in the group of mineralizers are connected in series; wherein the mineralizer is tube bundle micro A bubble mixer; a bubble prevention plate is installed between the tank body and the axial flow pump; and a feed screen is installed at the inlet of the axial flow pump.

The slurry in the energy-saving axial flow microbubble flotation tank body of the invention enters the axial flow pump through the inlet of the axial flow pump, and the axial flow pump is driven by the power device and the transmission shaft, and the slurry is pressurized by the axial flow pump and then enters multiple parallel connections. The connected mineralizer group enters the mineralizer through the feed pipe in the mineralizer group, and the compressed air is introduced into the mineralizer through the intake pipe and the intake branch pipe, and the pressure of the compressed air is greater than the axis The slurry pressure at the outlet of the flow pump, the compressed air and the slurry are evenly mixed in the mineralizer, and the slurry mixed with the compressed air is mineralized in the mineralization tube and released into the bottom of the flotation tank through the release head to produce the ore. The foam continues to rise and eventually exits the tank through the foam outlet. The unmineralized slurry is filtered through the feed screen and re-entered into the axial pump for circulation; a bubble arrester is installed between the tank and the axial pump. In order to prevent the mineralized foam from entering the axial flow pump, the operating efficiency of the axial flow pump is affected.

 The energy-saving axial flow microbubble flotation tank of the invention has the following beneficial effects compared with the conventional mechanically agitated inflatable flotation tank:

1. The energy-saving axial flow microbubble flotation tank of the invention adopts the slurry axial circulation technology, which can maximize the efficiency of the pump, obtain the ideal slurry circulation volume with the minimum electric energy, and the same volume of the trough type and the traditional flotation trough phase. It can save more than 80% of electricity consumption.

2. The mineralization process of minerals adopts microbubble mineralization and rapid flotation technology, which enables fine bubbles to fully combine with mineral particles, greatly improving the efficiency of flotation, and improving the efficiency of the same volume of troughs compared with conventional flotation cells. More than doubled.

DRAWINGS

 1 is a schematic cross-sectional view of the energy-saving axial flow microbubble flotation cell of the present invention when the mineralizer is horizontally installed;

 Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

 3 is a schematic cross-sectional view of the energy-saving axial flow microbubble flotation cell of the present invention when the mineralizer is vertically installed.

As shown in FIG. 1 and FIG. 2, the energy-saving axial flow microbubble flotation tank of the present invention is composed of a tank body 1, a power unit 2, a transmission shaft 3, an axial flow pump 4, an intake pipe 9, an intake manifold 10, and a foam outlet 13. , a plurality of mineralizer groups 11; the mineralizer group 11 is composed of a feed pipe 6, a mineralizer 7 The mineralization pipe 8 and the release head 12 are composed; the feed pipe 6 of each mineralizer group 11 is connected with the discharge port of the axial flow pump 4, and the intake pipe 9 is connected with the intake branch pipe 10, and the intake branch pipe 10 Connected to the mineralizer 7 in the group of mineralizers 11, the feed pipe 6, the mineralizer 7, the mineralization pipe 8, and the release head 12 in the group of mineralizers 11 are connected in series; wherein the mineralizer 7 is a bundle of tubes A micropore bubble mixer; a bubble prevention plate 14 is installed between the tank body 1 and the axial flow pump 4; and a feed screen 5 is installed at the inlet of the axial flow pump 4.

The slurry in the energy-saving axial flow microbubble flotation tank body 1 of the invention enters the axial flow pump 4 through the inlet of the axial flow pump 4, and the axial flow pump 4 is driven by the power device 2 and the transmission shaft 3, and the slurry passes through the axial flow pump 4 After pressurization, it enters a plurality of parallel connected mineralizer groups 11 in the mineralizer group 11 The feed pipe 6 enters the mineralizer 7, and the mineralizer 7 is filled with compressed air that is introduced through the intake pipe 9 and the intake branch pipe 10. The pressure of the compressed air is greater than the pressure of the slurry at the outlet of the axial flow pump, and the compression is performed. The air and the slurry are uniformly mixed in the mineralizer 7, and the slurry mixed with the compressed air is mineralized in the mineralization pipe 8, and released into the bottom of the flotation tank 1 through the release head 12, and the generated mineralized foam rises continuously. Finally, the tank is discharged through the foam outlet 13 , and the unmineralized slurry is filtered through the feed screen 5 , and then re-entered into the axial flow pump 4 for circulation; a bubble block is installed between the tank body 1 and the axial flow pump 4 . 14. In order to prevent the mineralized foam from entering the axial flow pump 4, the operating efficiency of the axial flow pump 4 is affected.

detailed description

Specific embodiment 1

The energy-saving axial flow microbubble flotation tank has a volume of 40m3, the tank body 1 has a square bottom with a traditional semicircular shape, the power unit 2 is installed at the top of the tank, the power unit power is 7.5KW, the transmission shaft 3, the axial flow pump 4, Intake pipe 9, intake branch pipe 10, foam outlet 13, mine The chemical group 11 is installed as shown in Fig. 1, and the mineralizer group 11 can be selected and mixed, and the mineralizer group 11 is composed of a feeding tube 6, a mineralizer 7, a mineralizing tube 8, and a releasing head 12. Installed as shown in Fig. 1; the feed pipe 6 of each mineralizer group 11 is connected to the discharge port of the axial flow pump 4, the intake pipe 9 is connected to the intake branch pipe 10, and the intake branch pipe 10 and the mineralizer group are connected. The mineralizer 7 in 11 is connected; wherein the mineralizer 7 is a tube bundle type microporous bubble mixer; a bubble prevention plate 14 is installed between the tank body 1 and the axial flow pump 4; and the inlet of the axial flow pump 4 is installed with a feed Screen 5 . The flotation tank has stable operation, low noise, uniform foam loading, and the foam layer can be stabilized between 800mm and 1000mm.

Specific embodiment 2

The energy-saving axial flow microbubble flotation tank has a volume of 20m3, the tank body 1 has a square bottom with a traditional semicircular shape, the power unit 2 is installed at the top of the tank, the power unit power is 4.5KW, the transmission shaft 3, and the axial flow pump 4 Intake pipe 9, intake branch pipe 10, foam outlet 13, mine The chemical group 11 is installed as shown in FIG. 1, and the mineralizer group 11 can be selected and mixed, and the mineralizer group 11 is composed of a feeding tube 6, a mineralizer 7, a mineralizing tube 8, and a releasing head 12. Installed as shown in Fig. 1; the feed pipe 6 of each mineralizer group 11 is connected to the discharge port of the axial flow pump 4, the intake pipe 9 is connected to the intake branch pipe 10, and the intake branch pipe 10 and the mineralizer group are connected. The mineralizer 7 in 11 is connected; wherein the mineralizer 7 is a tube bundle type microporous bubble mixer; a bubble prevention plate 14 is installed between the tank body 1 and the axial flow pump 4; and the inlet of the axial flow pump 4 is installed with a feed Screen 5 . The flotation tank has stable operation, low noise, uniform foam loading, and the foam layer can be stabilized between 400mm and 600mm.

Specific embodiment 3

The designed energy-saving axial flow microbubble flotation tank has a volume of 8m3, the tank body 1 has a square bottom with a traditional semicircular shape, the power unit 2 is installed at the top of the tank, the power unit power is 3.0KW, the transmission shaft 3, the axial flow pump 4, Intake pipe 9, intake branch pipe 10, foam outlet 13, mine The chemical group 11 is installed as shown in FIG. 3, and the mineralizer group 11 can be used in four, mixed and distributed; the mineralizer group 11 is composed of a feeding tube 6, a mineralizer 7, a mineralizing tube 8, and a release head 12. Installed as shown in Fig. 3; the feed pipe 6 of each mineralizer group 11 is connected to the discharge port of the axial flow pump 4, the intake pipe 9 is connected to the intake branch pipe 10, the intake branch pipe 10 and the mineralizer group The mineralizer 7 in 11 is connected; wherein the mineralizer 7 is a tube bundle type microporous bubble mixer; a bubble prevention plate 14 is installed between the tank body 1 and the axial flow pump 4; and the inlet of the axial flow pump 4 is installed with a feed Screen 5 . The flotation tank runs stably, the noise is small, the foam has a uniform loading capacity, and the foam layer can be stabilized between 300 mm and 400 mm.

Specific embodiment 4

The designed energy-saving axial flow microbubble flotation tank has a volume of 4m3, the tank body 1 has a square bottom with a traditional semicircular shape, the power unit 2 is installed at the top of the tank, the power unit power is 3.0KW, the transmission shaft 3, the axial flow pump 4, Intake pipe 9, intake branch pipe 10, foam outlet 13, mine The chemical group 11 is installed as shown in FIG. 3, and the mineralizer group 11 can be used in four, mixed and distributed; the mineralizer group 11 is composed of a feeding tube 6, a mineralizer 7, a mineralizing tube 8, and a release head 12. Installed as shown in Figure 3; the feed tube 6 of each of the group of mineralizers 11 is connected to the discharge port of the axial flow pump 4, The intake pipe 9 is connected to the intake branch pipe 10, and the intake branch pipe 10 is connected to the mineralizer 7 in the mineralizer group 11; wherein the mineralizer 7 is a tube bundle type microporous bubble mixer; the tank body 1 and the axial flow A bubble prevention plate 14 is installed between the pumps 4; a feed screen 5 is installed at the inlet of the axial flow pump 4. The flotation tank runs stably, the noise is small, the foam has a uniform loading capacity, and the foam layer can be stabilized between 200 mm and 300 mm.

Claims (4)

The energy-saving axial flow microbubble flotation tank is characterized in that the energy-saving axial flow microbubble flotation tank is composed of a tank body (1), a power device (2), a transmission shaft (3), an axial flow pump (4), and an intake pipe. (9), an intake branch pipe (10), a foam outlet (13), and a plurality of mineralizer groups (11); the mineralizer group (11) consists of a feed pipe (6), a mineralizer (7), The mineralization pipe (8) and the release head (12) are composed; the feed pipe (6) of each mineralizer group (11) is connected with the discharge port of the axial flow pump (4), and the intake pipe (9) is The intake branch pipe (10) is connected, the intake branch pipe (10) is connected to the mineralizer (7) in the mineralizer group (11), and the feed pipe (6) in the mineralizer group (11), The mineralizer (7), the mineralization tube (8), and the release head (12) are connected in series. The energy-saving axial flow microbubble flotation cell of claim 1 wherein the mineralizer (7) is a tube bundle type micropore bubble mixer. The energy-saving axial flow microbubble flotation cell according to claim 1, wherein a bubble prevention plate (14) is installed between the tank body (1) and the axial flow pump (4). The energy-saving axial flow microbubble flotation cell according to claim 1, characterized in that the inlet of the axial flow pump (4) is provided with a feed screen (5).

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