An insoluble collector adding device and a jet stirring column type flotation machine

Abstract

The application belongs to the technical field of flotation and particularly relates to an insoluble collector adding device and a jet stirring column type flotation machine. The application comprises a collector box, a barrel cavity of the collector box constitutes a collector cavity for containing intermediate medium, a liquid inlet pipe for inputting the intermediate medium is arranged on a side of the collector cavity, and a controllable opening and closing communication pipe communicating with a negative pressure chamber is arranged at a bottom of the collector cavity; a net barrel-shaped leakage barrel is further arranged in the collector cavity, a pressing plate capable of reciprocating extrusion along an axial direction of the leakage barrel is arranged in a barrel cavity of the leakage barrel, a porous water-absorbing elastic material is arranged on a bottom surface of the pressing plate, a collector flow channel is arranged at the pressing plate so that the collector can seep into the porous water-absorbing elastic material through the collector flow channel, a barrel cavity bottom surface height of the leakage barrel is lower than a liquid surface height of the intermediate medium, and a height of the porous water-absorbing elastic material in an initial high position is higher than the liquid surface height of the intermediate medium. The application can realize sufficient contact between the insoluble collector and the ore pulp and has the advantages of low cost, low energy consumption and simple and compact structure.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flotation, and particularly relates to an insoluble collector adding device and a jet stirring column type flotation machine. BACKGROUND

[0002] In the flotation process, the mined ore is crushed and wet ground to make various different minerals dissociate into single particles and the particle size meet the requirements of the flotation process; then, various flotation reagents with different functions, such as collectors, are added to the ground ore slurry, and the slurry is stirred in a stirring barrel to make the reagents interact with the mineral particles to expand the floatability difference between different mineral particles. The prepared slurry is sent to a flotation device and aerated, at this time, the mineral particles in the slurry contact and collide with the bubbles, and the mineral particles with good floatability are selectively adhered to the bubbles and carried to the surface of the slurry to become a mineralized froth layer, which is mechanically scraped or overflowed from the surface of the slurry, and then dehydrated and dried into a concentrate product; the mineral particles such as gangue that cannot float are discharged from the bottom of the flotation device as a tailings product, and finally the flotation operation is realized.

[0003] The current problems in coal preparation are as follows: 1. The addition of collector in flotation reagent can enhance the hydrophobicity of mineral particles. The current collectors used in coal preparation plant are mostly non-polar oil reagent. These non-polar oil reagents are almost insoluble in water, and the solubility of the collector with heteropolarity in water is also very low. Therefore, the dispersion of the two in water is poor, and it is difficult to achieve good dispersion of the collector in the ore slurry by direct addition or general method. If the collector cannot be uniformly dispersed in the ore slurry, not only a large amount of reagent is wasted, but also the coal slime flotation effect and the subsequent coal slime water treatment process are affected, thereby causing many troubles in actual coal preparation work. 2. The impeller of the flotation machine is a device that is easy to wear in the flotation machine, and needs to be replaced frequently in the production practice of coal preparation plant. This is because in the flotation machine with stirring function, the mixing of ore slurry and flotation reagent, the suspension of ore slurry, the dispersion of bubbles and the like are completed by the strong rotation of the impeller in the ore slurry. Therefore, the impeller is subjected to severe collision with solid particles in the ore slurry, and the wear of the impeller is often large. Since the impeller is enclosed in the body of the flotation machine and cannot be visually observed, the following indirect judgment methods are generally used to determine whether the impeller is worn: 1. The current of the stirrer decreases obviously; 2. The consumption of flotation reagent increases obviously; 3. The slime content of the concentrate increases obviously; 4. The air charge of the flotation machine decreases; 5. Experienced workers estimate by experience; 6. The impeller is observed during the inspection and maintenance of the flotation machine. The above-mentioned methods are either passive monitoring methods, in which the impeller is replaced after a period of continuous operation, and serious flotation problems are caused at this time; or experience judgment methods, in which the operation threshold of workers is high, and the possibility of misjudgment exists. Therefore, whether a kind of active detection device applied to the above-mentioned situation can be developed or not is also a technical problem to be solved in the field in recent years. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide an insoluble collector adding device which can realize sufficient contact between the insoluble collector and the ore slurry, and has the advantages of low cost, low energy consumption and simple and compact structure.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] An insoluble collector adding device, characterized in that: it comprises a collector box, a barrel cavity of the collector box constitutes a collector cavity for containing intermediate medium, a liquid inlet pipe for inputting intermediate medium is arranged on the side of the collector cavity, and a controllable opening and closing communication pipe communicating with a negative pressure chamber is arranged at the bottom of the collector cavity.

[0007] The collecting cavity is also provided with a net barrel-shaped leakage barrel, a pressing plate is arranged in the cylinder cavity of the leakage barrel and can make reciprocating extrusion action along the axial direction of the leakage barrel, the bottom surface of the pressing plate is provided with porous water-absorbing elastic material; the pressing plate is provided with a collector flow channel, so that the collector can seep into the porous water-absorbing elastic material through the collector flow channel; the bottom surface height of the barrel cavity of the leakage barrel is lower than the liquid level height of the intermediate medium, and the height of the porous water-absorbing elastic material in the initial high position is higher than the liquid level height of the intermediate medium.

[0008] Preferably, the pressing plate is a hollow plate, the hollow cavity of the pressing plate constitutes the collector flow channel; a power rod extends coaxially upward on the upper surface of the pressing plate, and the power rod is fixedly connected with the output end of the first power source to drive the pressing plate to make vertical lifting action; the power rod is a hollow rod, the collector descends through the pipe cavity of the power rod into the hollow cavity, and then seeps into the porous water-absorbing elastic material through the dispersion holes penetrating the bottom surface of the hollow cavity.

[0009] Preferably, the porous water-absorbing elastic material is a sponge, and the intermediate medium is water; the liquid inlet pipe is two and symmetrically distributed at both sides of the collecting box, the liquid inlet pipe is provided with a one-way valve which can only allow one-way liquid inlet, and the communication pipe is provided with a valve for realizing controllable opening and closing.

[0010] Preferably, the jet stirring column type flotation machine applies the insoluble collector adding device, characterized in that: the jet stirring column type flotation machine comprises a flotation box with a stirring assembly and a flotation agent input pipe for inputting the mixed flotation reagent into the flotation box, the input end of the flotation agent input pipe is communicated with the outlet of the negative pressure chamber, the reagent inlet of the negative pressure chamber is communicated with the communication pipe, and the slurry inlet of the negative pressure chamber is communicated with a slurry source through a pressure pump.

[0011] Preferably, the stirring assembly comprises a stirring shaft arranged in a vertical line and an impeller located at the bottom end of the stirring shaft, and a wear monitoring assembly for monitoring the state of the impeller is arranged in the flotation cavity below the impeller; the wear monitoring assembly comprises a fixed disc, a first eddy current coil for flaw detection of the entire impeller is arranged on the fixed disc, and the first eddy current coil constitutes a first flaw detection end of an eddy current detector; a guide rail is also arranged on the fixed disc, a slider probe is slidingly fitted on the guide rail, so that the slider probe can make linear reciprocating action along the radial direction of the impeller from the top of the impeller blade to the root of the impeller blade; a second eddy current coil is arranged in the slider probe, the installation positions of the first flaw detection end and the second flaw detection end are away from each other, and the second eddy current coil constitutes a second flaw detection end of the eddy current detector; the eddy current detector can be switched between the first flaw detection end and the second flaw detection end.

[0012] Preferably, the jet stirring column flotation machine further comprises a foaming assembly, the foaming assembly comprising a bubble generating chamber and a lifting piston fitted in the bubble generating chamber, the side of the bubble generating chamber being provided with an air inlet pipe with a one-way valve, the bottom of the bubble generating chamber being provided with air outlets; the air outlets are evenly arranged on the bottom of the bubble generating chamber, and each air outlet is provided with a one-way valve that is closed when the lifting piston moves upwards due to the negative pressure in the bubble generating chamber, so as to realize the one-way air bubble discharge of the air outlet.

[0013] Preferably, the lifting piston generates a predetermined motion through a coaxially upwardly extending driving rod; the top end of the driving rod is fixed to one end of a swing rod, the middle section of the swing rod is pivotally fitted in the bubble generating chamber through a hinge shaft, and the other end of the swing rod is pivotally connected to the sliding block probe through an extension rod, so as to form a driving structure for driving the sliding block probe; a vertical rack is arranged on the driving rod, and the vertical rack is driven by a power gear to make the driving rod generate a predetermined lifting motion.

[0014] Preferably, the jet stirring column flotation machine comprises a power motor, a small belt pulley, a negative pressure fan wheel and a power wheel are coaxially fixed on the power shaft of the power motor in sequence from top to bottom, and a belt transmission is formed between the small belt pulley and a large belt pulley at the top end of the stirring shaft; the negative pressure fan wheel is located at the air suction chamber, and the air outlet of the air suction chamber is connected to the air inlet pipe; the power wheel is in bevel gear cooperation with an intermediate wheel serving as a crank, an eccentrically hinged pull rod is arranged on the intermediate wheel, the other end of the pull rod is hingedly connected to a transverse rack, and the transverse rack constitutes a driving end for driving the power gear.

[0015] Preferably, the jet stirring column flotation machine further comprises a mixing pipe for air and water mixture, a first pipe section of the mixing pipe is connected to a communication pipe at the negative pressure chamber from bottom to top, and a second pipe section of the mixing pipe is horizontally connected to the bubble generating chamber; an exhaust valve for exhausting air to the communication pipe is arranged in the first pipe section, and a one-way valve for preventing backflow of medium in the mixing pipe is arranged in the second pipe section.

[0016] Preferably, a sleeve is coaxially fixed outside the stirring shaft, and a passing cavity for downward diffusion of flotation reagents is formed between the sleeve and the stirring shaft; a diffusion wheel and an impeller are arranged on the stirring shaft in sequence from top to bottom, a jet nozzle is arranged at the output end of a flotation reagent input pipe, and the jet direction of the jet nozzle points to the diffusion wheel; a shunt protrusion is protruded at one end of the shaft body between the diffusion wheel and the impeller, and liquid direction changes occur after the flotation reagents flow downward to the shunt protrusion; a shunt disc is protruded at the sleeve wall in the direction of the liquid direction changes, and shunt holes are arranged on the shunt disc; part of the flotation reagents enter the disc cavity of the shunt disc and are then discharged to the flotation cavity through the shunt holes, and the remaining flotation reagents flow downward to the impeller through the passing cavity.

[0017] The beneficial effects of the present application are as follows:

[0018] 1) The design purpose of the collector adding device of the present application is to ensure that the water-insoluble collector is fully diffused and contacted with the ore pulp; therefore, the basic idea is to drop the collector onto a porous water-absorbing elastic material, which needs to have the properties of strong oil absorption, softness and elasticity, and a porous surface; preferably, the porous material is a common sponge in life, which not only has the above properties but also is cheap. In use, the porous water-absorbing elastic material is fixedly connected with a pressing plate; when the porous water-absorbing elastic material absorbs enough collector, the pressing plate is pressed, and the collector in the porous water-absorbing elastic material is precipitated from the pores of the porous water-absorbing elastic material to form small oil droplets. In order to prevent the small oil droplets squeezed out from merging with each other, an intermediate medium such as water with a specified height of liquid surface is arranged in the collector cavity outside the leakage barrel, so that the small oil droplets diffused in the intermediate medium can be quickly drained and then contacted with the ore pulp through the communication hole.

[0019] So far, the present application can make the collector become many small oil droplets diffused in the intermediate medium, and finally contacted with the ore pulp. Under the condition of using only simple devices and cheap materials, the present application realizes the full contact of the insoluble collector with the ore pulp, which is beneficial to the full mixing of the two, and has the advantages of low cost, low energy consumption and simple and compact structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the working state of the jet stirring column flotation machine of the present application;

[0021] Figure 2 is Figure 1 is a partial enlarged view of I part of

[0022] Figure 3 is Figure 1 is a partial enlarged view of II part of

[0023] Figure 4 is a top view of the fixed disc;

[0024] Figure 5 is a structural schematic diagram of the foaming assembly;

[0025] Figure 6 and Figure 7 is a motion state diagram of one of the embodiments of the one-way valve.

[0026] The actual correspondence between the reference numbers and the component names of the present application is as follows:

[0027] 11-collector box; 12-liquid inlet pipe; 13-communication pipe; 14-leakage barrel; 15-pressing plate; 16-porous water-absorbing elastic material; 17-power rod; 18-valve; 19-floating ball water level monitor;

[0028] 20-negative pressure chamber;

[0029] 30 - flotation tank; 31 - flotation agent input pipe; 32 - pressure pump; 33 - jet nozzle;

[0030] 41 - stirring shaft; 42 - impeller; 43 - diffuser wheel; 44 - flow dividing protrusion;

[0031] 50 - wear monitoring assembly; 51 - base plate; 52 - first eddy current coil; 53 - eddy current detector; 54 - guide rail; 55 - slider probe;

[0032] 60 - foaming assembly; 61 - bubble generating chamber; 62 - lifting piston; 63 - air inlet pipe; 64 - air outlet; 64a - one-way valve; 65 - driving rod; 66 - swing rod; 67 - extension rod; 68 - power gear;

[0033] 71 - power motor; 72 - small pulley; 73 - negative pressure fan; 74 - power wheel; 75 - intermediate wheel; 76 - pull rod; 77 - transverse rack;

[0034] 80 - mixing pipe; 81 - first pipe section; 82 - second pipe section; 83 - exhaust valve;

[0035] 91 - sleeve; 92 - flow dividing disc. DETAILED DESCRIPTION

[0036] For the sake of understanding, the specific structure and working mode of the present application are described as follows: Figures 1-7 The specific structure and working mode of the present application are described as follows:

[0037] The specific embodiment of the present application is constructed as shown in the drawings, and the core point is to provide a jet stirring column type flotation machine with collector adding and wear monitoring function for the impeller 42. Figures 1-7 The advantages are that the wear condition of the impeller 42 can be monitored in real time for convenient replacement, the use of the pump is reduced, and sufficient aeration amount is ensured during the working process of the flotation machine. At the same time, the use of the bubble assembly also ensures the foaming amount of the flotation chamber, and through the linkage with other links, it further ensures that the gas can overcome the pressure of the ore pulp to smoothly enter the flotation chamber. Among them:

[0038] I. Insoluble collector adding device

[0039] The insoluble collector adding device of the present application is as shown in the drawings. Figures 1-2As shown, its design aims to ensure that the water-insoluble collector fully diffuses and comes into full contact with the slurry. Therefore, the basic idea is to drip the collector onto the porous water-absorbing elastic material 16. This material needs to have the following properties: strong oil absorption, softness and elasticity, and a porous surface. Preferably, the porous material is a common sponge, which not only has the above properties but is also inexpensive. In use, the porous water-absorbing elastic material 16 is fixedly connected to the pressure plate 15. After the porous water-absorbing elastic material 16 absorbs enough collector, the pressure plate 15 is pressed down, and the collector in the porous water-absorbing elastic material 16 precipitates out from the pores of the porous water-absorbing elastic material 16, forming small oil droplets. To prevent the squeezed-out small oil droplets from merging, an intermediate medium with a liquid level at a specified height is arranged in the collecting chamber outside the filter 14, so that the small oil droplets diffused in the intermediate medium can be quickly guided until they come into contact with the slurry through the connecting hole.

[0040] For ease of understanding, the working process of the insoluble collector addition device is described below, using porous water-absorbing elastic material 16 as a sponge and water as the intermediate medium:

[0041] The collector is added to the hollow power rod 17, which is integral with the hollow pressure plate 15. For example... Figure 2 As shown, the collector enters the power rod 17 and flows into the collector channel of the pressure plate 15, then drips from the pressure plate 15 into the sponge. A metal funnel 14 is fixed inside the collection chamber of the collection box 10, with its lower part submerged in water and its upper part above the water surface. The sponge and pressure plate 15 are arranged within the funnel 14, initially both at a higher position, i.e., above the water surface. After the sponge absorbs a certain amount of collector, the pressure plate 15 presses down, flattening the sponge between the bottom of the funnel 14 and the pressure plate 15, at which point the sponge is submerged in water; during compression, the collector inside the sponge precipitates from the holes and diffuses into the water. The pressure plate 15 and the valve 18 at the bottom of the collection box 10 can be synchronously switched. When the pressure plate 15 is pressed down, the valve 18 opens synchronously. Water carrying the collector is quickly drawn into the negative pressure chamber 20 through the connecting pipe 13 under the action of negative pressure, and fully mixes with the slurry in the negative pressure chamber 20. Of course, if manually controlled, a slight delay or advance in the opening of the valve 18 is acceptable. After a certain delay, the pressure plate 15 rises with the sponge, the valve 18 closes, and the inlet pipe 12 begins to supply water to replenish the water level. When the water level reaches a certain height, the float level monitor 19 is triggered, the inlet pipe 12 closes, and the next round of chemical dosing begins.

[0042] Thus, it can be seen that the present invention can transform the collector into numerous small oil droplets that diffuse in the intermediate medium and ultimately contact the slurry. Using only simple equipment and inexpensive materials, the present invention achieves sufficient contact between the insoluble collector and the slurry, and has the advantages of low cost, low energy consumption, and simple and compact construction.

[0043] II. Foaming assembly 60

[0044] A specific embodiment of the foaming assembly 60 is shown in Figure 1 , Figure 3 and Figures 5-7 , which has an upper part with a crank linkage mechanism formed by the intermediate wheel 75, the pull rod 76 and the transverse rack 77, and a lifting piston 62 driven by the power gear 68, a left side connected to the second pipe section 82 of the mixing pipe 80 through a one-way valve, a right side connected to the air inlet pipe 63 through a one-way valve, and a lower part arranged with the air outlet 64.

[0045] As shown in Figure 3 , when the crank linkage mechanism drives the power gear 68 to rotate counterclockwise, the power gear 68 can drive the driving rod 65 to produce a vertical action, so as to realize the purpose of moving the lifting piston 62 downward under the action of the power gear 68, so that the gas in the bubble generation chamber 61 is extruded outward. Since the air inlet structures on the left and right sides are connected through one-way valves, the gas can only be extruded out of the air outlet 64 at the lower part. The air outlet 64 is arranged with a one-way valve 64a as shown in Figures 6-7 , which can make the closed air outlet 64 open to discharge gas under the action of pressure.

[0046] As shown in Figure 3 , when the crank linkage mechanism drives the gear to rotate clockwise, the lifting piston 62 moves upward under the action of the power gear 68, the volume of the bubble generation chamber 61 becomes larger, the air pressure becomes smaller, and a negative pressure is generated. The air outlet 64 at the lower part is normally closed, and is closed more tightly under the action of the negative pressure suction force as shown in Figure 6 . The gas in the second pipe section 82 and the air inlet pipe 63 is all absorbed into the bubble generation chamber 61.

[0047] Of course, in actual operation, the one-way valve 64a can not only adopt the structure as shown in Figures 6-7 , but also can adopt four elastic membrane blades closely adhered to each other, each of which is triangular in shape and has elasticity. When the four membrane blades are not completely adhered to each other, there is a large enough gap for the gas to pass through; when the lifting piston 62 moves downward, the gas impacts the membrane blades to make them expand outward, until the pressure compresses the four membrane blades to overcome their elastic force, forming an opening for the gas to escape. Similarly, when the lifting piston 62 moves upward, the membrane blades shrink inward under the action of the negative pressure suction force, so that the membrane blades are subjected to an inward pulling force under the condition of natural closing, so that they are closed more tightly. Of course, other one-way membrane structures are also feasible.

[0048] Through the above structure, the foaming assembly 60 is driven by the rotating motion of the power motor 71 on one hand, without additional power. On the other hand, when the lifting piston 62 moves upward, negative pressure is generated, which can also help the gas in the air inlet pipe 63 quickly enter the bubble generating chamber 61, and the bubble generating chamber 61 is in a closed state when air is inhaled, so there is no pressure of the ore pulp to hinder the gas from entering. Finally, the special design of the foaming assembly 60 of the present application makes it impossible for the gas outlet 64 to be blocked, and even if a small amount of medium such as water enters or blocks the gas outlet 64 during operation, it will also be quickly squeezed out of the gas outlet 64 under high pressure, thereby further avoiding the blocking of the gas outlet 64.

[0049] III. Wear monitoring assembly 50

[0050] The wear monitoring assembly 50 is based on the principle of eddy current testing, and can monitor the wear condition of the impeller 42 of the flotation machine in real time according to requirements.

[0051] When assembling, as shown in Figure 1 and Figures 3-4 , the top of the wear monitoring assembly 50 is a stator 51, and the impeller 42 flings a part of the ore pulp to the periphery, and another part of the ore pulp impacts the stator 51 downward. The stator 51 can be designed to have two parts of hollow and solid, and the ore pulp falling from the hollow part impacts the ore pulp of the solid part to spread to the periphery along the arc, which ensures the full diffusion of the ore pulp. Of course, a stator 51 with a full solid structure and a corresponding eddy current coil can also be used, which does not affect the wear detection effect. Since the present application does not rely on the negative pressure formed between the impeller 42 as the rotor and the stator 51 as the stator to suck air, the spacing requirement between the stator and the rotor is not strict.

[0052] The bottom of the wear monitoring assembly 50 is fixed to the upper end of the foaming assembly 60 by a support, etc., and the inside of the support is connected with a line connecting the first eddy current coil 52 and the second eddy current coil, one pole of the line is connected with the positive pole of the power supply, and the other pole is connected with the eddy current detector 53 and the negative pole of the power supply.

[0053] The stator 51 is made of high-strength rubber material, and the first eddy current coil 52 is embedded inside, and as shown in Figure 4 , a rectangular hollow part constituting a guide rail 54 is arranged, and the rectangular hollow part is the movement area of the slider probe 55, and the slider probe 55 is provided with a second eddy current coil.

[0054] When the jet stirring column flotation machine is not working, only alternating current is input to the first eddy current coil 52, and the first eddy current coil 52 generates an alternating magnetic field under the action of the alternating current, thereby generating eddy currents in the metal impeller 42. The eddy currents generated in the impeller 42 in turn act on the first eddy current coil 52, so that the first eddy current coil 52 generates a reaction current under the action of the eddy currents. If the impeller 42 is severely worn, the eddy currents will change significantly, and the reaction current will also change significantly. By measuring the change of the reaction current, the change of the eddy currents can be measured, and thus the information of the test piece can be obtained. In this way, the wear condition of the impeller 42 of the flotation machine can be judged by the eddy current detector 53 without contacting the impeller 42.

[0055] In the above non-working state, the first eddy current coil 52 can be relied on for overall monitoring. When the present application is in a working state, on-site monitoring can be achieved through the slide block probe 55. That is, when the jet stirring column flotation machine is working, the wear condition of the impeller 42 can be monitored by local monitoring.

[0056] Specifically, one of the probes of the eddy current detector 53 is manufactured into a slide block probe 55, which can only reciprocate left and right within a certain range. The lifting piston 62 of the foaming assembly 60 is connected to the swing rod 66 by extending a certain length upward, and the swing rod 66 can rotate around a fixed point. When the crank connecting rod driving power gear 68 rotates and in turn drives the lifting piston 62 to move up and down, the swing rod 66 will also rotate back and forth within a certain arc. One end of the swing rod 66 is connected to the slide block probe 55 through the extension rod 67 to form a simple driving mechanism, so that the swing rod 66 swings upward and downward, and the slide block probe 55 is also pulled and moves left and right along the guide rail 54 on the fixed disc 51 in a straight line.

[0057] Of course, the slide block probe 55 also has a coil inside, that is, a second eddy current coil, which also generates an alternating magnetic field by inputting alternating current. Unlike overall monitoring, local monitoring can only monitor a small part of the impeller 42 in the stopped state. However, since the slide block probe 55 moves in a straight line and the movement distance is the radius of the impeller 42, local monitoring can be from a point to a line and even from a line to a surface, which is equivalent to the process of filling a hollow circle; after a certain working time, local monitoring can also cover the whole impeller 42, which is suitable for use when the impeller 42 rotates at high speed in a working state.

[0058] At this point, the wear monitoring assembly 50 of the present application realizes the monitoring of the wear of the impeller 42 in the working or shutdown state of the jet stirring column flotation machine, ensuring the function of real-time monitoring. In particular, many coal preparation plants will shut down the production machine for inspection to ensure that the work can be carried out smoothly, and even some coal preparation plants implement a two-shift production and one-shift maintenance mode. Overall measurement during shutdown is necessary to ensure that the production process can proceed smoothly and prevent the replacement of the impeller 42 during the process. The overall measurement during shutdown is compared with the eddy current monitoring conditions of the standard impeller 42 at 1% wear, 2% wear, 3% wear, …, 10% wear, …, 15% wear, and of course the standard impeller comparison group should be established according to the specific requirements. If the monitoring result shows that the wear is greater than 10%, the impeller 42 needs to be replaced; on this basis, some prediction should be added to ensure that the wear of the impeller 42 is less than 10% when the next round of shutdown maintenance is performed, so that the work task can be completed smoothly. Since the impeller 42 does not work during shutdown, the monitoring result is compared with the monitoring conditions of the comparison group, and the reliability is high. However, if the overall measurement is performed during the rotation of the impeller 42, the rotation of the impeller 42 will have some effect on the result, which will increase the difficulty of eddy current wear measurement and ultimately reduce the reliability of the comparison result.

[0059] In view of this, the present application adopts local monitoring during the working process of the impeller 42, because the diameter of the coil inside the slider probe 55 is small, the generated eddy current is large, and it is easier to measure, and to some extent, it can compensate for the influence of the movement of the impeller 42 on the monitoring result. In fact, local monitoring can timely discover the wear condition of a certain part of the surface of the impeller 42, and even more hidden and subtle cracks and scratches, so as to reflect the overall wear condition from the local; local monitoring can also more accurately reflect the overall wear condition through the accumulation of monitoring results, with remarkable effect.

[0060] IV. Work flow

[0061] In actual work, the ore pulp is sucked into the ore pulp agitator by the booster pump 32; after being pressurized by the booster pump 32, the ore pulp quickly enters the negative pressure chamber 20. The negative pressure chamber 20 is connected with the insoluble collector adding device on one side, and uses the negative pressure to quickly absorb the water carrying many small oil droplets in the insoluble collector adding device, so that the small oil droplets and the ore pulp can be fully contacted. On the other hand, the first pipe section 81 of the mixing pipe 80 of the negative pressure chamber 20 is arranged with an exhaust valve 83 in the middle. During work, the air and a small amount of water in the mixing pipe 80 are sucked into the negative pressure chamber 20 under the action of the negative pressure of the negative pressure chamber 20, a part of the air enters the negative pressure chamber 20 through the exhaust valve 83 to contact with the ore pulp and then enters the flotation operation; the other part of the air and a small amount of water enter the air inlet pipe 63 through the one-way valve to enter the bubble generating chamber 61 of the foaming assembly 60.

[0062] For the negative pressure chamber 20, after mixing the slurry with air and water containing small oil droplets, the mixed slurry enters the flotation tank 30 through the flotation agent input pipe 31, and is rapidly impacted by the diffuser wheel 43 by the jet nozzle 33, then enters the sleeve 91, and then flows through the diversion plate 92. Part of the slurry is diverted by the diversion protrusion 44 and enters the diversion plate 92, and is then discharged by the diversion plate 92 and directly enters the flotation area; the other part of the slurry is thrown to the sides by the impeller 42 at the bottom, thus completing the slurry feeding.

[0063] During operation, the rotational power of the stirring shaft 41 comes from the slurry jet impact diffusion wheel 43 and the power motor 71, which are powered by a belt drive mechanism at the small pulley 72. This retains some characteristics of traditional jet agitation flotation machines. For example... Figure 1 As shown, the power shaft of the motor 71 is coaxially connected to a negative pressure impeller 73. The negative pressure impeller 73 draws gas into the suction chamber, and the drawn gas enters the foaming assembly 60 through the intake pipe 63. The power wheel 74, located at the bottom of the power shaft, meshes with the intermediate wheel 75 through a bevel gear. The intermediate wheel 75 then sequentially achieves the joint action of the lifting piston 62 at the foaming assembly 60 and the slider probe 55 at the wear monitoring assembly 50 according to the aforementioned crank-connecting rod mechanism plus gear and rack transmission. Of course, when the machine is stopped, a sufficiently large AC current is input into the first eddy current coil 52 to monitor the impeller 42 as a whole.

[0064] Therefore, the above-described workflow of the present invention has the following characteristics:

[0065] 1. It retains the advantages of traditional jet agitation flotation machines and overcomes the disadvantage of easy clogging of the air outlet 64.

[0066] 2. The gas in the jet-stirred column flotation machine of the present invention has three sources: air carried by the slurry, air drawn into the foaming component 60 through the mixing pipe 80, and air absorbed by the negative pressure impeller 73, which ensures that the flotation machine has sufficient air supply.

[0067] 3. A special insoluble collector addition device is used, which allows even insoluble collectors to fully diffuse in water and come into full contact with the slurry, effectively improving flotation efficiency and flotation quality.

[0068] 4. This invention can autonomously monitor the impeller 42 in real time, whether in operation or shutdown, and can promptly grasp the wear condition of the impeller 42 and replace it, thus ensuring the stability and high efficiency of flotation.

[0069] 5. Only one booster pump 32 and one set of power motors 71 are used, which reduces the number of pumps and motors used and saves production costs.

[0070] 6. The linkage between each structure is strong, and the insoluble collector adding device, negative pressure chamber 20, stirring assembly, air suction chamber where negative pressure wind wheel 73 is located and foaming assembly 60 can act in coordination with each other, further improving the efficiency and high quality of flotation, with remarkable results.

[0071] Of course, the present application is not limited to the details of the above-described exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0072] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0073] The technologies, shapes, and structural parts not described in detail in the present application are well-known technologies.

Claims

1. An insoluble collector addition device, characterized by: The collector tank (11) has a cylindrical cavity for accommodating the intermediate medium, a liquid inlet pipe (12) arranged on the side of the collector cavity for inputting the intermediate medium, and a controllable opening and closing communication pipe (13) arranged at the bottom of the collector cavity and communicating with the negative pressure chamber (20); The collector cavity is further provided with a net barrel-shaped leakage barrel (14), the cylindrical cavity of the leakage barrel (14) is provided with a pressing plate (15) capable of reciprocating extrusion along the axial direction of the leakage barrel (14), the bottom surface of the pressing plate (15) is provided with a porous water-absorbing elastic material (16), the collector agent flow channel is arranged at the pressing plate (15), so that the collector agent can penetrate into the porous water-absorbing elastic material (16) through the collector agent flow channel, the bottom surface height of the barrel cavity of the leakage barrel (14) is lower than the liquid level of the intermediate medium, and the height of the porous water-absorbing elastic material (16) in the initial high position is higher than the liquid level of the intermediate medium.

2. A device for adding an insoluble collector according to claim 1, characterized in that: The pressing plate (15) is a hollow plate, the hollow cavity of the pressing plate (15) forms the collector agent flow channel, a power rod (17) extends coaxially upward on the upper surface of the pressing plate (15), the power rod (17) is fixedly connected with the output end of the first power source to drive the pressing plate (15) to generate a vertical lifting action, the power rod (17) is a hollow rod, the collector agent descends through the pipe cavity of the power rod (17) into the hollow cavity, and then penetrates into the porous water-absorbing elastic material (16) through the dispersion hole penetrating the bottom surface of the hollow cavity.

3. A device for adding an insoluble collector according to claim 1, characterized in that: The porous water-absorbing elastic material (16) is a sponge, the intermediate medium is water, the liquid inlet pipe (12) is two and symmetrically arranged on both sides of the collector tank (11), the liquid inlet pipe (12) is provided with a one-way valve capable of allowing liquid to flow in only one direction, and the communication pipe (13) is provided with a valve (18) for realizing controllable opening and closing.

4. A jet agitated column flotation machine applying an insoluble collector addition device as claimed in claim 1 or 2 or 3, characterized in that: The flotation machine comprises a flotation tank (30) provided with a stirring assembly and a flotation agent input pipe (31) for inputting mixed flotation reagents into the flotation tank (30), the input end of the flotation agent input pipe (31) communicates with the outlet of the negative pressure chamber (20), the reagent inlet of the negative pressure chamber (20) communicates with the communication pipe (13), and the ore pulp inlet of the negative pressure chamber (20) communicates with an ore pulp source through a pressure pump (32).

5. The fluidic agitated column flotation machine of claim 4, characterized in that: The stirring assembly comprises a stirring shaft (41) arranged in a vertical direction and an impeller (42) located at the bottom end of the stirring shaft (41).

6. The fluidic agitated column flotation machine of claim 5, characterized in that: The jet stirring column flotation machine further comprises a foaming assembly (60), the foaming assembly (60) comprises a bubble generating chamber (61) and a lifting piston (62) fitted in the bubble generating chamber (61), the side of the bubble generating chamber (61) is provided with an air inlet pipe (63) provided with a one-way valve, and the bottom of the bubble generating chamber (61) is provided with gas outlets (64) penetratingly arranged; each gas outlet (64) is arranged on the bottom of the bubble generating chamber (61), and each gas outlet (64) is provided with a one-way valve (64a) capable of sealing the membrane surface when the lifting piston (62) ascends due to the negative pressure generated in the bubble generating chamber (61), so as to realize the one-way bubble emission action of the gas outlet (64).

7. The fluidic agitated column flotation machine of claim 6, characterized in that: The lifting piston (62) produces a predetermined action through a coaxially upward extending driving rod (65); a vertical rack is arranged on the driving rod (65) and is driven by a power gear (68) to make the driving rod (65) produce a predetermined lifting action.

8. The fluidic agitated column flotation machine of claim 7, characterized in that: The jet stirring column type flotation machine comprises a power motor (71), a small belt wheel (72), a negative pressure wind wheel (73) and a power wheel (74) are fixed in sequence from top to bottom on a power shaft of the power motor (71), a belt drive is formed between the small belt wheel (72) and a large belt wheel at a top end of a stirring shaft (41); the negative pressure wind wheel (73) is located at an air suction chamber, an air outlet of the air suction chamber is communicated with the air inlet pipe (63); the power wheel (74) is in bevel gear cooperation with an intermediate wheel (75) which acts as a crank, a pull rod (76) is hingedly arranged on the intermediate wheel (75) in an eccentric manner, the other end of the pull rod (76) is hingedly connected with a transverse rack (77), and the transverse rack (77) constitutes a driving end for driving the power gear (68).

9. The hydrojet agitated column flotation machine according to claim 6, characterized in that: A mixing pipe (80) for mixing air and water is further included, a first pipe section (81) of the mixing pipe (80) is communicated to the communicating pipe (13) at the negative pressure chamber (20) from bottom to top, and a second pipe section (82) of the mixing pipe (80) is horizontally communicated with the bubble generating chamber (61); an exhaust valve (83) for exhausting air at the communicating pipe (13) is arranged in the first pipe section (81), and a one-way valve for preventing backflow of medium in the mixing pipe (80) is arranged in the second pipe section (82).

10. The fluidic agitated column flotation machine of claim 5, characterized by: A sleeve (91) is coaxially fixed outside the stirring shaft (41), a passing cavity for downward diffusion of flotation reagents is formed between the sleeve (91) and the stirring shaft (41); a diffusion wheel (43) and an impeller (42) are arranged in sequence from top to bottom at the stirring shaft (41), a jet nozzle (33) is arranged at an output end of the flotation reagent input pipe (31), and a jet direction of the jet nozzle (33) points to the diffusion wheel (43); a shunt protrusion (44) is protruded at one end of a shaft body between the diffusion wheel (43) and the impeller (42), liquid direction change is generated after the flotation reagents downwardly pass through the shunt protrusion (44); a shunt disc (92) is protruded at a sleeve wall of the sleeve (91) in a direction of the liquid direction change, and shunt holes are arranged on the shunt disc (92); part of the flotation reagents enters a disc cavity of the shunt disc (92) and is then discharged to the flotation cavity through the shunt holes, and the rest of the flotation reagents downwardly passes through the passing cavity to the impeller (42).

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