A secondary enrichment device for flotation foam and a flotation column structure

Abstract

The present invention discloses a secondary enrichment device for flotation foam and a flotation column structure, which includes a fixed net structure, a sliding net structure and a driving mechanism; the fixed net structure includes a fixed frame and a fixed net; the sliding net structure includes a sliding frame and a sliding net; the sliding net structure is located in the fixed frame, and the sliding net is above the fixed net; the driving mechanism is connected to the sliding frame; when the sliding net structure slides relative to the fixed net structure, the sliding net and the fixed net act together to cut the foam layer. The fixed net structure and the sliding net structure are located in the foam layer at the top of the flotation column. Under the action of the driving mechanism, the sliding net structure can slide relative to the fixed net structure, and the sliding net and the fixed net act together to cut the foam layer. By cutting, the bubbles in the same layer can be uniformly broken, so that the water film becomes thinner, with good controllability and improved secondary enrichment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral flotation, and particularly relates to a device for secondary enrichment of flotation foam and a flotation column structure. Background Art

[0002] Secondary enrichment in flotation is an effective method for mineral separation and purification. In the mineralized foam, there are often some particles of associated minerals and gangue. Since the water flows downward in the foam layer, most of the entrained ore can be washed and fall back into the pulp. When the bubbles merge in the foam layer, the gas-liquid interfacial area decreases, and the ore particles originally loaded on the bubbles are rearranged, so that the strongly hydrophobic ones still adhere to the bubbles, and the weakly hydrophobic ones are carried into the pulp by the flowing water, thus improving the concentrate quality.

[0003] During the flotation process, hydrophobic particles adhere to the bubbles, forming particle-air aggregates. The aggregates are lighter than water and move upward to the surface of the pulp to form flotation foam. The properties of the flotation bubbles will affect the quality of the concentrate product.

[0004] Generally, it is required that the flotation bubbles have the characteristics of uniform distribution, appropriate size, appropriate toughness and low viscosity. If the bubbles are brittle and non-sticky, the secondary enrichment effect of the mineralized bubbles is too strong, which easily causes a decrease in the flotation recovery rate. If the bubbles have strong toughness and high viscosity, the secondary enrichment effect of the mineralized bubbles is poor, which easily causes serious entrainment in the foam product and a decrease in the concentrate quality; at the same time, it will also cause situations such as foam overflowing from the tank and being difficult to transport.

[0005] Currently, the method of spraying at the top of the foam layer is often used to break the top foam to improve the enrichment effect. However, the method of spraying at the top of the foam layer can only break the foam at the top that can be sprayed by the spraying water. If the spraying water cannot be evenly sprayed, the foam at the top is also difficult to break evenly, the water film cannot be thinned, the controllability is poor, and the secondary enrichment effect is not good. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a device for secondary enrichment of flotation foam and a flotation column structure, which can make the bubbles in the same layer break evenly by cutting, make the water film thinner, have good controllability, and improve the secondary enrichment effect.

[0007] The technical solution of the present invention provides a device for secondary enrichment of flotation foam, including a fixed net structure for installing on a flotation column, a sliding net structure disposed on the fixed net structure and capable of sliding relative to the fixed net structure, and a driving mechanism for driving the sliding net structure to slide;

[0008] The fixed net structure includes a fixed frame and a fixed net installed in the fixed frame;

[0009] The sliding net structure includes a sliding frame and a sliding net installed at the bottom of the sliding frame;

[0010] The sliding net structure is located within the fixed frame, and the sliding net is above the fixed net;

[0011] The driving mechanism is connected to the sliding frame;

[0012] When the sliding net structure slides relative to the fixed net structure, the sliding net and the fixed net cooperate to cut the foam layer.

[0013] In one alternative technical solution, the sliding net is in contact with the fixed net.

[0014] In one alternative technical solution, the mesh holes of the sliding net and the mesh holes of the fixed net are arranged staggeredly.

[0015] In one alternative technical solution, the fixed frame is provided with a guide rod extending horizontally, and the sliding frame is slidably connected to the guide rod.

[0016] In one alternative technical solution, two relatively arranged sliding net structures are configured in the fixed frame;

[0017] A tension member for pulling the two sliding net structures to move towards the middle is configured between the two sliding net structures;

[0018] Each sliding frame is connected to a set of the driving mechanisms, and the two sets of driving mechanisms are used to drive the two sliding net structures to move apart;

[0019] The driving mechanism has an actuated state and a non-actuated state, and can be switched between the actuated state and the non-actuated state;

[0020] When the driving mechanism is in the actuated state, the two sliding net structures overcome the action of the tension member, and the two sliding net structures move apart from each other;

[0021] When the driving mechanism is in the non-actuated state, under the action of the tension member, the two sliding net structures move closer to each other.

[0022] In one alternative technical solution, the driving mechanism includes an adsorption magnet installed in the sliding frame, an electromagnet installed in the fixed frame, a circuit supply mechanism for supplying power to the electromagnet, and a control mechanism for controlling the switch of the circuit supply mechanism;

[0023] The circuit supply mechanism is signal-connected to the control mechanism;

[0024] When the electromagnet is in the energized state, the adsorption magnet and the electromagnet attract each other.

[0025] In one of the alternative technical solutions, each of the sliding frames has a frame opening toward the middle side of the fixed frame.

[0026] In one of the alternative technical solutions, a plurality of the tension members are connected between the two sliding mesh structures.

[0027] In one of the alternative technical solutions, the tension member is a tension spring.

[0028] The technical solution of the present invention provides a flotation column structure, including a flotation column and the flotation foam secondary enrichment device described in any one of the foregoing technical solutions;

[0029] The flotation column has a channel for the slurry to flow, the flotation foam secondary enrichment device is installed at the top of the channel, and the fixed frame is fixedly connected to the channel wall of the channel.

[0030] Adopting the above technical solution, the following beneficial effects are achieved:

[0031] The flotation foam secondary enrichment device and the flotation column structure provided by the present invention have the fixed mesh structure and the sliding mesh structure in the foam layer at the top of the flotation column. Under the action of the driving mechanism, the sliding mesh structure can slide relative to the fixed mesh structure. The sliding mesh and the fixed mesh cooperate to cut the foam layer. By cutting, the bubbles in the same layer can be uniformly broken, so that the water film becomes thinner, with good controllability, and the secondary enrichment effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Referring to the drawings, the disclosure of the present invention will become more understandable. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0033] Figure 1 is a top view of the flotation foam secondary enrichment device provided by an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of a sliding frame configured with an adsorption magnet and a fixed frame configured with an electromagnet;

[0035] Figure 3 is a partial side sectional view of the flotation foam secondary enrichment device;

[0036] Figure 4 is a schematic diagram of the electrical connection of the control mechanism, the circuit supply mechanism, and the electromagnet;

[0037] Figure 5 is a schematic diagram of the flotation column structure provided by an embodiment of the present invention. Detailed implementation manners

[0038] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0039] As Figure 1-2 shown, a secondary enrichment device for flotation foam provided in an embodiment of the present invention includes a fixed mesh structure 1 for being installed on a flotation column 5, a sliding mesh structure 2 disposed on the fixed mesh structure 1 and capable of sliding relative to the fixed mesh structure 1, and a driving mechanism 4 for driving the sliding mesh structure 2 to slide.

[0040] The fixed mesh structure 1 includes a fixed frame 11 and a fixed mesh 12 installed in the fixed frame 11.

[0041] The sliding mesh structure 2 includes a sliding frame 21 and a sliding mesh 22 installed at the bottom of the sliding frame 21.

[0042] The sliding mesh structure 2 is located in the fixed frame 11, and the sliding mesh 22 is above the fixed mesh 12.

[0043] The driving mechanism 4 is connected to the sliding frame 21.

[0044] When the sliding mesh structure 2 slides relative to the fixed mesh structure 1, the sliding mesh 22 and the fixed mesh cooperate to cut the foam layer 7.

[0045] The secondary enrichment device for flotation foam provided by the present invention is used to be installed at Figure 5 the top of the channel 51 of the flotation column 5 as shown, so as to cut the foam layer 7 to form a thinner water film.

[0046] The secondary enrichment device for flotation foam provided by the present invention includes a fixed mesh structure 1, a sliding mesh structure 2 and a driving mechanism 4.

[0047] The fixed mesh structure 1 is fixedly installed in the channel 51, and it includes a fixed frame 11 and a fixed mesh 12. The fixed mesh 12 is installed in the fixed frame 11. The fixed frame 11 can be connected to the channel wall of the channel 51 through fasteners.

[0048] The sliding mesh structure 2 is disposed in the fixed frame 11 and can slide relative to the fixed mesh structure 1. The sliding mesh structure 2 includes a sliding frame 21 and a sliding mesh 22. The sliding mesh 22 is installed at the bottom of the sliding frame 21 to be close to the fixed mesh 12.

[0049] The driving mechanism 4 is connected to the sliding frame 21 and is used to drive the sliding mesh structure 2 to slide relative to the fixed mesh structure 1. The driving mechanism 4 can be selected from a piston driving mechanism, a motor screw driving mechanism, an electromagnetic driving mechanism, etc. that can reciprocally drive.

[0050] If the piston driving mechanism is selected for the driving mechanism 4, the main body part of the piston driving mechanism can be selected to be installed on the flotation column 5, and the piston rod of the piston driving mechanism is connected to the sliding frame 21 to drive the sliding mesh structure 2 to reciprocate.

[0051] If the motor screw driving mechanism is selected for the driving mechanism 4, the main body part of the motor screw driving mechanism can be selected to be installed on the flotation column 5, and a nut with internal threads is configured on the sliding frame 21. The screw passes through the nut, and the screw meshes with the nut for transmission to drive the sliding mesh structure 2 to reciprocate.

[0052] If the electromagnetic driving mechanism is selected for the driving mechanism 4, a permanent magnet with a constant magnetic property is configured at one end of the fixed frame 11 / sliding frame 21, and an electromagnet capable of changing the magnetic property is correspondingly configured at one end of the sliding frame 21 / fixed frame 11. The electromagnet is connected to an external control circuit, and the control circuit can change the direction of the current supplied to the electromagnet, thereby changing the magnetic pole of the electromagnet. For example, the permanent magnet is an N pole. When the control circuit supplies power to the electromagnet from one end, the electromagnet is an N pole, then the permanent magnet and the electromagnet repel each other, causing the sliding frame 21 to move forward, and the distance between the permanent magnet and the electromagnet increases; when the control circuit supplies power to the electromagnet from the other end, the electromagnet is an S pole, then the permanent magnet and the electromagnet attract each other, causing the sliding frame 21 to move backward, and the distance between the permanent magnet and the electromagnet decreases, so as to drive the sliding mesh structure 2 to reciprocate.

[0053] In order to show the specific structure, the dimensions of the fixed frame 11 and the sliding frame 21 are drawn relatively large in the drawings of the present invention. In practice, the fixed frame 11 and the sliding frame 21 are relatively thin, slightly thicker than the mesh, as long as they can fix the internal mesh. In this way, it basically does not affect the effect of cutting the foam layer 7 and is also beneficial to reducing the structural weight.

[0054] The fixed mesh 12 and the sliding mesh 22 can be selected from metal meshes, nylon meshes, etc. The fixed frame 11 and the sliding frame 21 are correspondingly selected from metal frames, plastic frames, etc.

[0055] A bubble generator will be configured in the channel 51, and a bubble layer 7 will be generated at the top of the slurry 6 in the channel 51. This is the prior art and will not be elaborated here.

[0056] The flotation foam secondary enrichment device is selected to be installed at the position where the bubble layer 7 is generated, and the flotation foam secondary enrichment device will be immersed in the bubble layer 7.

[0057] During flotation, the drive mechanism 4 actuates, and the sliding mesh structure 2 reciprocates relative to the fixed mesh structure 1. The sliding mesh 22 and the fixed mesh cooperate to cut the foam layer 7. By cutting, the bubbles in the same layer can be uniformly broken, thereby thinning the water film, having good controllability, and improving the secondary enrichment effect.

[0058] Taking flotation clean coal as an example, during the process of thinning the water film, bubble rupture and coalescence are likely to occur. The clean coal particles with strong hydrophobicity will be adhered by the bubbles below, and the coal ash with weak hydrophobicity will be carried away by the water flow generated when the bubbles break and flow into the slurry 6 below, thereby improving the secondary enrichment effect.

[0059] In the present invention, only by controlling the actuation frequency of the drive mechanism 4, the effect of cutting the foam layer 7 can be controlled, and the controllability is good. The actuation frequency of the sliding mesh structure 2 can be selected according to actual needs.

[0060] Preferably, the sliding mesh structure 2 reciprocates at a frequency of 30 to 300 times per second.

[0061] In one embodiment, as Figure 3 shown, the sliding mesh 22 is in contact with the fixed mesh 12 to better cut the foam layer 7 and generate a thinner water film.

[0062] In one embodiment, as Figure 2 shown, the mesh holes of the sliding mesh 22 and the fixed mesh 12 are arranged in a staggered manner, which improves the mesh density of the sliding mesh 22 and the fixed mesh 12 and is beneficial to improving the effect of cutting the foam layer 7.

[0063] For the convenience of description, the wire in the sliding direction of the sliding mesh 22 is called the warp wire, and the wire perpendicular to the sliding direction is called the weft wire.

[0064] The warp wires of the sliding mesh 22 and the warp wires of the fixed mesh 12 are arranged in a staggered manner. There is at least one warp wire of the fixed mesh 12 below the adjacent two warp wires of the sliding mesh 22, and there is at least one warp wire of the sliding mesh 22 above the adjacent two warp wires of the fixed mesh 12.

[0065] In one embodiment, as Figure 3 shown, a laterally extending guide rod 13 is provided on the fixed frame 11, and the sliding frame 21 is slidably connected to the guide rod 13.

[0066] In this embodiment, a guide rod 13 is configured on the fixed frame 11. The guide rod 13 extends towards the center of the fixed frame 11, and the end of the guide rod 13 has a limit block. The sliding frame 21 has a guide hole, and the guide rod 13 passes through the guide hole with a clearance to provide a guiding effect for the reciprocating sliding of the sliding frame 21.

[0067] In one embodiment, asFigure 1-2 As shown, two relatively arranged sliding net structures 2 are configured in the fixed frame 11.

[0068] A tension member 3 for pulling the two sliding net structures 2 to move towards the middle is configured between the two sliding net structures 2.

[0069] Each sliding frame 21 is connected to a set of driving mechanisms 4, and the two sets of driving mechanisms 4 are used to drive the two sliding net structures 2 to move apart.

[0070] The driving mechanism 4 has an actuated state and a non-actuated state, and can be switched between the actuated state and the non-actuated state.

[0071] When the driving mechanism 4 is in the actuated state, the two sliding net structures 2 overcome the action of the tension member 3, and the two sliding net structures 2 move apart from each other.

[0072] When the driving mechanism 4 is in the non-actuated state, under the action of the tension member 3, the two sliding net structures 2 move closer to each other.

[0073] In this embodiment, two sliding net structures 2 are configured to reduce the stroke of each sliding net structure 2, improve the actuation frequency of each sliding net structure 2, reduce the time for the foam to adhere to the net, quickly form a relatively thin water film, and improve the effect of cutting the foam layer 7.

[0074] Specifically, the two sliding net structures 2 are relatively arranged in the fixed frame 11, and a tension member 3 is configured between the two sliding net structures 2. The tension member 3 is used to pull the two sliding net structures 2 to move towards the middle. The tension member 3 can be connected between the two sliding frames 21 and / or the sliding net 22. The tension member 3 can be an elastic member.

[0075] Each sliding frame 21 is connected to a set of driving mechanisms 4, and the two sets of driving mechanisms 4 actuate or stop acting simultaneously. When the two sets of driving mechanisms 4 actuate simultaneously, they will drive the two sliding net structures 2 to move apart.

[0076] During flotation, when the two sets of driving mechanisms 4 are both in the actuated state, the two sliding net structures 2 overcome the action of the tension member 3, and the two sliding net structures 2 move apart from each other, that is, one sliding net structure 2 moves towards one side of the fixed frame 11, and the other sliding net structure 2 moves towards the other side of the fixed frame 11. When the two sets of driving mechanisms 4 are both in the non-actuated state, under the action of the tension member 3, the two sliding net structures 2 move closer to each other, that is, the two sliding net structures 2 both move towards the middle of the fixed frame 11.

[0077] In one of the embodiments, as Figure 1-4As shown, the driving mechanism 4 includes an adsorption magnet 41 installed in the sliding frame 21, an electromagnet 42 installed in the fixed frame 11, a circuit supply mechanism 43 for supplying power to the electromagnet 42, and a control mechanism 44 for controlling the switch of the circuit supply mechanism 43.

[0078] The circuit supply mechanism 43 is signal-connected to the control mechanism 44.

[0079] When the electromagnet 42 is in the energized state, the adsorption magnet 41 and the electromagnet 42 attract each other.

[0080] In this embodiment, the driving mechanism 4 adopts a form of electromagnetic driving mechanism, which includes an adsorption magnet 41, an electromagnet 42, a circuit supply mechanism 43 and a control mechanism 44.

[0081] The adsorption magnet 41 can be a permanent magnet, which is installed in the sliding frame 21. The sliding frame 21 can be a magnetic-conductive metal frame, such as an iron frame. The sliding mesh 22 can be a non-magnetic-conductive metal mesh, such as a copper wire mesh; of course, the sliding mesh 22 can also be a non-magnetic-conductive nylon mesh.

[0082] The electromagnet 42 is selected to be installed in the fixed frame 11. When the electromagnet 42 is conductive, the electromagnet 42 and the adsorption magnet 41 attract each other. The advantage of arranging the electromagnet 42 in the fixed frame 11 is that it is convenient to connect the wires. The fixed frame 11 can be a magnetic-conductive metal frame, such as an iron frame. The fixed mesh 12 can be a non-magnetic-conductive metal mesh, such as a copper wire mesh; of course, the fixed mesh 12 can also be a non-magnetic-conductive nylon mesh. A magnetic-conductive insulating coating is applied to the electromagnet 42, the circuit and the corresponding installation positions to avoid electric leakage. The magnetic-conductive insulating layer is an existing material, which can be made of manganese-zinc ferrite, nickel-zinc ferrite, copper-zinc ferrite, iron-silicon-aluminum or carbonyl iron materials.

[0083] The circuit supply mechanism 43 is composed of a circuit board, wires, a power supply, etc., and is used to supply power to the electromagnet 42.

[0084] The control mechanism 44 is a controller, a computer, etc., and is used to control the circuit board, the power supply, etc. to realize automatic power supply and power-off.

[0085] When the control mechanism 44 controls the circuit supply mechanism 43 to supply power to the electromagnet 42, the electromagnet 42 has magnetism, and the adsorption magnet 41 and the electromagnet 42 attract each other, and the two sliding mesh structures 2 move away from each other. When the control mechanism 44 controls the circuit supply mechanism 43 to cut off the power supply to the electromagnet 42, the electromagnet 42 has no magnetism, and under the action of the tension member 3, the two sliding mesh structures 2 move closer to each other.

[0086] In one of the embodiments, as Figure 1-2As shown, each sliding frame 21 has a frame opening 211 on the middle side facing the fixed frame 11, such that the side of the sliding frame 21 facing the middle has no border, and the edge of the sliding net 22 is located in the frame opening 211, increasing the area of the sliding net 22.

[0087] In one embodiment, as Figure 1 shown, a plurality of tension members 3 are connected between two sliding net structures 2, increasing the acting force when the two sliding net structures 2 approach each other.

[0088] In one embodiment, the tension member 3 is a tension spring, which has good elastic effect and is convenient for installation.

[0089] As Figure 5 shown, an embodiment of the present invention provides a flotation column structure, including a flotation column 5 and the flotation foam secondary enrichment device described in any of the foregoing embodiments.

[0090] The flotation column 5 has a channel 51 for the flow of the slurry 6, the flotation foam secondary enrichment device is installed at the top of the channel 51, and the fixed frame 11 is fixedly connected to the channel wall of the channel 51.

[0091] The flotation column structure provided by the present invention includes a flotation column 5 and a flotation foam secondary enrichment device.

[0092] Regarding the structure, configuration and working principle of the flotation foam secondary enrichment device, please refer to the description part of the flotation foam secondary enrichment device above, and will not be elaborated here.

[0093] A groove may be opened at the top of the channel 51 of the flotation column 5 to install the fixed frame 11, minimizing the occupation of the channel 51 and increasing the area of the fixed net 12 in the channel 51.

[0094] According to needs, the above technical solutions can be combined to achieve the best technical effect.

[0095] The above are only the principles and preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, based on the principles of the present invention, several other variations can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A secondary enrichment device for flotation foam, characterized in that, It includes a fixed net structure for installation on a flotation column, a sliding net structure disposed on the fixed net structure and capable of sliding relative to the fixed net structure, and a driving mechanism for driving the sliding net structure to slide; The fixed net structure includes a fixed frame and a fixed net installed in the fixed frame; The sliding net structure includes a sliding frame and a sliding net installed at the bottom of the sliding frame; The sliding net structure is located in the fixed frame, and the sliding net is above the fixed net; The driving mechanism is connected to the sliding frame; When the sliding net structure slides relative to the fixed net structure, the sliding net and the fixed net cooperate to cut the foam layer; Two relatively arranged sliding net structures are configured in the fixed frame; A tension member for pulling the two sliding net structures to move towards the middle is arranged between the two sliding net structures; Each sliding frame is connected to a set of the driving mechanisms, and the two sets of driving mechanisms are used to drive the two sliding net structures to move apart; The driving mechanism has an actuated state and a non-actuated state and can be switched between the actuated state and the non-actuated state; When the driving mechanism is in the actuated state, the two sliding net structures overcome the action of the tension member and move apart from each other; When the driving mechanism is in the non-actuated state, under the action of the tension member, the two sliding net structures move closer to each other.

2. The secondary enrichment device for flotation foam according to claim 1, wherein The sliding net is in contact with the fixed net.

3. The secondary enrichment device for flotation foam according to claim 1, wherein, The mesh holes of the sliding net and the mesh holes of the fixed net are arranged in a staggered manner.

4. The secondary enrichment device for flotation foam according to claim 1, characterized in that, A laterally extending guide rod is arranged on the fixed frame, and the sliding frame is slidably connected to the guide rod.

5. The flotation foam secondary enrichment device according to claim 1, wherein The driving mechanism includes an adsorption magnet installed in the sliding frame, an electromagnet installed in the fixed frame, a circuit supply mechanism for supplying power to the electromagnet, and a control mechanism for controlling the switch of the circuit supply mechanism; The circuit supply mechanism is signal-connected to the control mechanism; When the electromagnet is in the energized state, the adsorption magnet and the electromagnet attract each other.

6. The flotation foam secondary enrichment device according to claim 1, wherein Each sliding frame has a frame opening on the middle side facing the fixed frame.

7. The flotation foam secondary enrichment device according to claim 1, wherein A plurality of the tension members are connected between the two sliding net structures.

8. The secondary enrichment device for flotation foam according to claim 1, characterized in that, The tension member is a tension spring.

9. A flotation column structure, characterized in that, It includes a flotation column and the flotation foam secondary enrichment device according to any one of claims 1-8; A channel for slurry flow is provided in the flotation column, the flotation foam secondary enrichment device is installed at the top of the channel, and the fixed frame is fixedly connected to the channel wall of the channel.

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