Magnetic flotation column with tailing elutriation function

Abstract

The invention relates to the technical field of magnetic flotation columns, and discloses a magnetic flotation column with a tailing elutriation function, the magnetic flotation column comprises an inner cylinder, and the periphery of the inner cylinder is fixedly connected with an electromagnetic coil; an outer cylinder is arranged on the periphery of the electromagnetic coil; the bottom of the inner cylinder is fixedly connected with a conical concentrator. When feed ore is elutriated and sorted, a spirally rising flow field is formed in an overflow area, ore pulp in the overflow area is pushed to spirally rise, flotation froth and tailings rising to the overflow area are wrapped to overflow in an accelerated mode, and the problem that the flow speed of the flow field is high in the center and low in the periphery due to resistance of a peripheral barrel and a bubble generation device is solved; and the tailing water can be directly returned to the interlayer cavity through the conveying pipe, so that the tailing water is recycled, and the purpose of saving water is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic flotation columns, in particular to a magnetic flotation column with a tailings washing function. Background Art

[0002] Ore dressing is the process of removing a large amount of gangue and harmful elements contained in the ore, enriching useful minerals, or separating various useful minerals from each other to obtain one or several useful mineral concentrate products. Iron ore dressing processes mainly include magnetic separation, flotation, gravity separation, and the continuously developing combined beneficiation process. In recent years, the flotation-magnetic separation or magnetic-flotation separation process has developed rapidly in the field of iron ore dressing technology. Composite force field separation has become an important way to improve separation efficiency. The elutriation magnetic flotation machine developed by using the elutriation magnetic separator to increase the flotation function has made progress. At present, iron ore generally uses flotation columns or elutriation magnetic separators as concentrating equipment, but the particle size range of these two equipment is limited. Among them, the flotation column is mainly used for the separation of hydrophilic and hydrophobic minerals. The separation index of over-fine and coarse-grained minerals is low, and the operation and management are difficult. In addition, single flotation has problems such as long process, high flotation cost, complex reagent addition, easy scaling of pipelines, and difficulty in filtering. At present, only a few iron ore dressing plants are using it in China. The washing magnetic separator is mainly used to separate magnetic and non-magnetic minerals, and is suitable for the selection of minerals with uniform particle size. After large-scale and intelligent improvements, the washing magnetic separator has been widely used in large and small mines at home and abroad. However, when used in single magnetic separation of hematite, pyrrhotite and titanomagnetite, the effect of mineral separation is poor when the magnetic properties and density differences of mineral particles are not big, and harmful impurities cannot be effectively removed.

[0003] Since the elutriation magnetic flotation machine needs to use compressed gas to generate bubbles that combine with flotation agents to adhere to hydrophobic particles to achieve mineral separation, the process is limited and a large amount of flushing water cannot be used to meet the requirements of washing tailings of the elutriation magnetic separator. The main reason is that the use of flushing water to enter the washing cylinder will dilute the concentration of flotation agents and affect the flotation effect. Not using flushing water will result in low flow field velocity, small kinetic energy of mineral particles, and low mineral processing efficiency. Especially when the cross-sectional diameter of the overflow weir of the washing cylinder of a large magnetic flotation machine is large, the flow field velocity is "strong in the center and weak around" and the phenomenon is obvious, causing the coarse particles adhering to the bubbles to fall off and settle down under the influence of gravity before reaching the overflow weir, and cannot float up, affecting the mineral processing indicators.

[0004] The washing magnetic flotation machine needs to maintain a stable upper flow field to achieve static sorting. The washing cylinder of this type of equipment is usually connected from top to bottom. In order to enhance the mineral dispersion and mineralization effect, the slurry mixed with reagents is fed into the middle of the washing cylinder and dispersed. The lower slurry is formed into a strong turbulent zone by adding water or gas or mechanical stirring. The force field in the middle and lower sorting areas will inevitably move up and expand, destroying the sorting environment of the upper overflow area. Therefore, how to improve the sorting environment of the upper overflow area of ​​the existing magnetic flotation machine, that is, to solve the problem of coarse tailings falling off and sinking and unable to overflow, and to ensure that the resolved fine magnetite particles are excessively impacted by turbulence and "running away" is a very urgent task. Summary of the invention

[0005] The object of the present invention is to provide a magnetic flotation column with tailings washing function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A magnetic flotation column with tailings washing function, comprising an inner cylinder 1001, wherein an electromagnetic coil 200 is fixedly connected to the periphery of the inner cylinder 1001;

[0007] An outer cylinder 100 is disposed outside the electromagnetic coil 200 ; a conical concentrator 10013 is fixedly connected to the bottom of the inner cylinder 1001 .

[0008] Furthermore, it also includes an overflow area, which includes: the top of the inner tube 1001 is fixedly connected to an overflow tube 10011, the top of the overflow tube 10011 is fixedly connected to an overflow column 10014, the top of the overflow column 10014 is fixedly connected to an overflow weir 100115, the periphery of the overflow column 10014 is fixedly connected to an overflow trough 400, the bottom of the overflow trough 400 is inclined, and an overflow port 4002 is opened on the lower side; the side wall of the overflow tube 10011 forms an inverted frustum structure, and the cross-section gradually increases from bottom to top; or, the side wall of the overflow tube 10011 forms a cylindrical structure; the feeder 3007 is fixed at the upper part of the axis of the overflow trough 400.

[0009] Furthermore, the side wall of the overflow tube 10011 and / or the overflow column 10014 has a sandwich cavity 100111 structure; the sandwich cavity 100111 is provided with a water inlet for communicating with an external water inlet pipe 100112, and the water inlet pipe 100112 is provided with a regulating valve 100113; a plurality of sandwich water outlet holes 1001111 are provided on the side wall of the sandwich cavity 100111 close to the axis of the inner tube 1001; the water inlet pipe 100112 can be connected with an external water source or air source; a plurality of the sandwich water outlet holes 1001111 are arranged in a direction at an acute angle to the horizontal or in a horizontally symmetrical direction to generate a flushing water flow or flushing air flow that spirals up along the wall.

[0010] Further, the interlayer water outlet hole 1001111 is provided with a guide plate 100114 and / or a guide tube 100116; the interlayer water outlet hole 1001111 is an orifice matched with the guide tube 100116 or a slit matched with the guide plate 100114; the root of the guide plate 100114 or the guide tube 100116 is provided with a locking device 1001141 for adjusting the jet angle;

[0011] The pressurized water flow or air flow is introduced into the interlayer cavity 100111 through the water inlet pipe 100112 and the regulating valve 100113, and the upward impulse and centrifugal force generated in the top overflow area by the guide plate 100114 and / or the guide pipe 100116 form a spiral upward slurry flow, which helps the coarse particle impurities and flotation foam in the slurry to cross the overflow weir 100115 and enter the overflow tank 400.

[0012] Further, the sandwich cavity 100111 is a spiral cavity structure that spirally rises along the side wall of the overflow tube 10011 and / or the overflow column 10014, or is a completely hollow structure;

[0013] When the interlayer cavity 100111 is a spiral cavity structure, a blocking weir 1001113 corresponding to the interlayer water outlet hole 1001111 is provided on the side wall of the interlayer cavity 100111 close to the axis of the inner tube 1001.

[0014] Furthermore, a mid-ore discharge mechanism is connected to the low point of the blocking weir 1001113, and the mid-ore discharge mechanism includes: a mid-ore outlet pipe and a mid-ore valve pump fixedly connected in sequence; the mid-ore valve pump is connected to the interlayer cavity 100111; the mid-ore valve pump is a solenoid valve, or an electric regulating valve, or a mid-ore pump.

[0015] Furthermore, a feeder 3007 is provided at the upper part of the axis of the inner cylinder 1001; the top of the feeder 3007 is not lower than the overflow trough 400 or the overflow weir 100115; the bulk material port at the bottom of the feeder 3007 is placed inside the inner cylinder 1001 and higher than the top of the balance column (10012); one side of the feeder 3007 is connected to the feeding mechanism 300; the feeding mechanism 300 includes: a storage box 3002, a discharge pipe 3006 and a feeder 3007; the discharge pipe 3006 is an L-shaped structure, the upper opening of which is fixedly connected to the lower opening of the storage box 3002, and the side opening of which is fixedly connected to the side opening of the feeder 3007.

[0016] Furthermore, the storage box 3002 includes: a support leg 3001, the bottom of the support leg 3001 is fixedly connected to the top of the overflow tank 400, and the top of the support leg 3001 is fixedly connected to the storage box 3002; a support frame 3003 is fixedly connected to one side of the storage box 3002, a servo motor 3004 is fixedly connected to the top of the support frame 3003, and a power output shaft 3005 is fixedly connected to the bottom of the servo motor 3004; the power output shaft 3005 rotates through the top of the support frame 3003 and the top plate of the storage box 3002, and is rotatably connected to the inner side of the bottom plate of the storage box 3002; the power output shaft 3005 is located at the top of the support frame 3003 and the storage box 3002. The first gear 3008 is fixedly connected to the part between the top plates; the first agitator 3009 is provided on the part of the power output shaft 3005 located in the storage box 3002; the first gear 3008 is meshed with the second gear 30092 on one side, the second gear 30092 is fixedly connected to the rotating rod 30093, and the part of the rotating rod 30093 located in the storage box 3002 is provided with a second agitator 30094; the part of the rotating rod 30093 located above the second gear 30092 is fixedly connected to the cam 30091; a feeding port is provided on one side of the storage box 3002; a positioning rod 30098 is fixedly connected to the middle of one side of the storage box 3002;

[0017] The feeding tube 3006 comprises: a fixing frame 30095 is fixedly connected to the front and rear sides of the feeding tube 3006, a sliding rod 300991 is fixedly connected inside the fixing frame 30095, a sealing plate 30097 is slidably connected to one end of the sliding rod 300991, a sliding groove is provided inside the feeding tube 3006, the sealing plate 30097 is slidably connected to the sliding groove, a spring 300992 is sleeved on the outer periphery of the sliding rod 300991, a connecting frame 30096 is fixedly connected to one end of the sealing plate 30097, the connecting frame 30096 is provided with a positioning hole 300981 which is slidably connected with the positioning rod 30098, and a sliding push plate 30099 is fixedly connected to the top of the connecting frame 30096; one side of the spring 300992 is connected to the sealing plate 30097, and the other side of the spring 300992 is connected to the fixing frame 30095;

[0018] Among them, the cam 30091 and the sliding plate 30099 are arranged in the same plane and can produce horizontal reciprocating linkage: when the protruding side of the cam 30091 rotates and contacts the sliding plate 30099, it can gradually push the sliding plate 30099 to move toward the outside of the lower material tube 3006, drive the sealing plate 30097 to move toward the outside of the lower material tube 3006, so that the lower material tube 3006 gradually changes into a conductive state; when the protruding side of the cam 30091 rotates and gradually moves away from the sliding plate 30099, the spring 300992 can push the sealing plate 30097 to move toward the inside of the lower material tube 3006, so that the lower material tube 3006 gradually changes into a cut-off state.

[0019] Furthermore, a concentrate regulating valve 500 is fixedly connected to the bottom of the conical concentrator 10013; an air supply mechanism 600 is arranged on the periphery of the conical concentrator 10013; a water supply pipe 700 is fixedly connected to the side wall of the outer cylinder 100; the water supply pipe 700 is connected to the inner cylinder 1001; a water supply valve 701 is fixedly connected to one end of the outer side of the water supply pipe 700, and the water supply valve 701 controls the water supply pipe 700 to inject water into the inner cylinder 1001.

[0020] Furthermore, the conical concentrator 10013 is provided with an air supply mechanism 600; the air supply mechanism 600 includes a bubble generating device 601, an air supply pipe 602, an air supply valve 604 and a high-pressure air source 603;

[0021] The bubble generating device 601 is inserted and connected to the side wall of the conical concentrator 10013, and the air outlet at one end is placed inside the conical concentrator 10013 and / or at the lower part of the inner cylinder (1001), and the other end is fixedly connected to the air supply pipe 602 outside the conical concentrator 10013, and the depth of the bubble generating device 601 inserted into the conical concentrator 10013 can be adjusted;

[0022] One side of the air supply pipe 602 is fixedly connected to one end of the air supply valve 604, and the other end of the air supply valve 604 is connected to the high-pressure air source 603;

[0023] The bubble generating devices 601 are provided in plurality, and are respectively inserted and connected to the side wall of the conical concentrator 10013;

[0024] The air outlet of the bubble generating device 601 extends deep into the bottom area of ​​the inner cylinder 1001;

[0025] The length of each of the bubble generating devices 601 is determined according to the position of the air outlet hole into the bottom area inside the inner cylinder 1001 .

[0026] Furthermore, it also includes a tailings pipeline, a slurry separator and a slurry pump which are connected in sequence; the tailings slurry discharged from the overflow port 4002 flows through the tailings pipeline through the slurry separator to form tailings water, which is pumped into the water inlet pipe 100112 by the slurry pump and returns to the interlayer cavity 100111;

[0027] The magnetic field generated by the electromagnetic coil 200 acts in the opposite direction to the buoyancy, guiding the strong magnetic minerals to settle downward and the weak magnetic or non-magnetic minerals to overflow upward;

[0028] The electromagnetic coils 200 are multiple groups, and the multiple groups of electromagnetic coils 200 are powered on and off according to a certain rule to generate a pulsating magnetic field in a downward direction.

[0029] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0030] 1. The present invention provides a feeding mechanism. When the ore is washed and sorted, the slurry is put into the storage box through the top of the storage box. Under the action of the power output shaft, the rotating rod, the first gear, the second gear, the first stirring and the second stirring device, the slurry can not only be stirred to make the slurry mixed more evenly, but also when the rotating rod rotates, the push plate will be squeezed by the cam, so that the push plate drives the connecting frame and the sealing plate to move, and the connecting frame slides along the axial direction of the positioning rod, and the sealing plate slides inside the discharge pipe. During the movement of the sealing plate, it moves along the axial direction of the sliding rod and squeezes the spring, so that the slurry in the storage box can be evenly passed through the discharge pipe into the feeder, and enters the inner cylinder for washing and sorting. The fluidity of the slurry can be enhanced by stirring, the bubbles can be better dispersed in the slurry, the contact opportunity between the bubbles and the ore particles is increased, the ore particles and the bubbles are fully mixed in the slurry, and the flotation efficiency is improved.

[0031] 2. The present invention washes the tailings by setting a special overflow area at the top of the outer cylinder. The water inlet pipe can be connected to an external water source or gas source. The interlayer cavity is used to discharge water or gas, which can ensure that the pressure of each water outlet is consistent. A guide plate or guide pipe is set at the orifice or slit outlet to change the outflow direction of the flushing water or air flow, ensuring that the water or gas outlet is stable, evenly distributed, and the direction is controllable. The slit outlet further ensures that the flushing water or air flow is distributed in a planar shape, which is conducive to forming a stable vortex. The water outlet is set at a certain angle to generate a flushing water flow that spirally rises along the wall of the overflow cylinder and drives the slurry in the central area to rotate, forming a spirally rising flow field in the overflow area, pushing the slurry in the overflow area to spirally rise, and entraining the flotation foam and tailings that rise to the overflow area to accelerate the overflow, solving the problem of "strong center and weak surrounding" in the flow field velocity caused by the surrounding cylinder resistance and the bubble generating device. It is conducive to the coarse-grained tailings floating and crossing the overflow weir into the overflow tank as soon as possible, enhancing the ability to process coarse-grained minerals. The area where the rotating water flow is generated is limited to the periphery of the partial area where the cross-section is enlarged. Even if the bubbles burst at this time, the tailings particles will rotate upward along the inner side of the overflow weir under the action of centrifugal force and will not sink back. Furthermore, adding a blocking weir on the side of the interlayer cavity close to the axis of the cylinder can effectively block the sinking and return path of the coarse tailings particles, and the coarse tailings particles are regularly discharged by periodically switching the intermediate ore pump or the intermediate ore electric valve. Part of the slurry in the overflow area will return to the lower part of the inner cylinder for re-selection, and part of it will overflow to become tailings. "Having the tailings washing function" means that the present invention can help the coarse particles in the "overflow area slurry" that should overflow but did not overflow due to sedimentation to overflow or be collected as intermediate ore.

[0032] 3. The present invention provides a gas supply mechanism, and the high-pressure gas source provides stable high-pressure gas, which is transported to the bubble generating device through the gas supply pipe. The bubble generating device disperses the gas into a large number of tiny bubbles and releases them into the ore pulp containing flotation agents to generate mineralized bubbles. The gas supply valve is used to control the flow and pressure of the gas to ensure that the bubble generating device can obtain an appropriate amount of gas. Through these steps and working principles, the magnetic flotation column can achieve effective separation and recovery of mineral particles.

[0033] 4. The mineralized bubbles and tailings particle aggregates of the present invention enter the overflow area and can be immediately flushed by the surrounding oblique upward spiral water flow or air flow, and quickly pass through the overflow weir to become tailings. Furthermore, unlike the present invention, the upper and lower diameters of the cylindrical inner cylinder of column-type mineral processing equipment such as traditional magnetic separation columns and flotation columns are consistent. If flushing water is introduced into the top overflow area, the slurry and reagents will be diluted, causing the mineralized bubbles to rupture, and the mineral particles adhered to the bubbles will directly settle down along the inner cylinder, affecting the flotation operation. The overflow area at the top of the inner cylinder of the present invention is designed as an inverted truncated cone structure with a gradually increasing cross-section. The flushing water flow introduced mainly acts on the peripheral area of ​​the overflow cylinder 10011 where the diameter is enlarged, and directly overflows along the spiral rise of the cylinder wall, and will not enter the magnetic flotation operation area in the middle and lower parts of the inner cylinder to dilute the flotation reagents and affect the flotation index. The present invention adds a relay effect of an oblique upward spiral water flow or air flow in the overflow area, which can quickly overflow the rising tailings and foam, and also allows the amount of air or water added in the lower part of the inner tube to be appropriately reduced, thereby avoiding overflow and black leakage of fine-grained magnetic concentrate and improving the recovery rate.

[0034] 5. The present invention can directly use the tailings discharged from the overflow tank to replace the external water source. One end of the slurry separator is connected to the tailings pipeline, and the slurry pump directly returns the tailings water to the interlayer cavity through the delivery pipe, so as to realize the recycling of tailings water and achieve the purpose of water saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 A schematic diagram of the structure of a magnetic flotation column with tailings washing function provided in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a cross-sectional structure of a magnetic flotation column with a tailings washing function provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of another magnetic flotation column with tailings washing function provided in an embodiment of the present invention;

[0039] Figure 4 A partial side cross-sectional schematic diagram of a type 1 structure of an overflow area with a guide plate provided in an embodiment of the present invention;

[0040] Figure 5 A schematic top view of a type 1 structure provided in an embodiment of the present invention;

[0041] Figure 6 A schematic cross-sectional view of a type 1 structure in direction A provided in an embodiment of the present invention;

[0042] Figure 7 A partial enlarged schematic diagram of a type 1 structure at position B provided in an embodiment of the present invention;

[0043] Figure 8 A schematic diagram of a partial cross-sectional structure of a type 1 structure guide plate provided in an embodiment of the present invention;

[0044] Fig. 9 A partial side cross-sectional schematic diagram of a type 2 structure of an overflow area with a guide plate provided in an embodiment of the present invention;

[0045] Fig.10 A schematic top view of a type 2 structure provided in an embodiment of the present invention;

[0046] Fig.11 A schematic cross-sectional view of a type 2 structure in the C direction provided in an embodiment of the present invention;

[0047] Fig.12 A partial enlarged schematic diagram of a type 2 structure at position D provided in an embodiment of the present invention;

[0048] Fig.13 A partial side cross-sectional schematic diagram of a type 3 structure of an overflow area with a guide pipe provided in an embodiment of the present invention;

[0049] Fig.14 A schematic top view of a type 3 structure provided in an embodiment of the present invention;

[0050] Fig.15 A partial schematic diagram of a side section structure of a type 3 structure at a guide tube provided in an embodiment of the present invention;

[0051] Fig.16 A partial side cross-sectional schematic diagram of a 4-type structure in which the sandwich cavity is a spiral cavity provided in an embodiment of the present invention;

[0052] Fig.17 A schematic top view of a type 4 structure provided in an embodiment of the present invention;

[0053] Fig.18 A partial enlarged schematic diagram of a type 4 structure at position F provided in an embodiment of the present invention;

[0054] Fig.19 A schematic diagram of the structure of a feeding mechanism provided in an embodiment of the present invention;

[0055] Fig. 20 A schematic cross-sectional structure diagram of a material storage box provided in an embodiment of the present invention;

[0056] Fig.21 A schematic diagram of a local structure of a feed pipe provided in an embodiment of the present invention;

[0057] Fig. 22 A schematic diagram of a partial structure of a sealing plate provided in an embodiment of the present invention;

[0058] Fig.23 The present invention provides a schematic diagram of the structure of an air supply mechanism according to an embodiment of the present invention.

[0059] In the figure: 100, outer cylinder; 1001, inner cylinder; 200, electromagnetic coil; 300, feeding mechanism; 3001, supporting leg; 3002, storage box; 3003, supporting frame; 3004, servo motor; 3005, power output shaft; 3006, feeding pipe; 3007, feeder; 3008, first gear; 3009, first stirrer; 30091, cam; 30092, second gear; 30093, rotating rod; 30094, second stirrer; 30095, fixing frame; 30096, connecting frame; 30097, sealing plate; 30098, positioning rod; 300981, positioning hole; 30099, sliding plate; 300991, sliding rod; 300992 , spring; 400, overflow trough; 4002, overflow port; 500, concentrate regulating valve; 600, air supply mechanism; 601, bubble generating device; 602, air supply pipe; 603, high-pressure air source; 604, air supply valve; 700, water supply pipe; 701, water supply valve; 10011, overflow cylinder; 10012, balance column; 10013, conical concentrator; 10014, overflow column; 100111, interlayer cavity; 100112, water inlet pipe; 100113, regulating valve; 100114, guide plate; 1001141, locking device; 100115, overflow weir; 100116, guide pipe; 1001111, interlayer water outlet; 1001113, blocking weir. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] The following are embodiments of the present invention.

[0062] Combination Figure 1 to Figure 2 As shown, a magnetic flotation column with tailings washing function includes an inner cylinder 1001, an electromagnetic coil 200 is fixedly connected to the periphery of the inner cylinder 1001; an outer cylinder 100 is arranged on the periphery of the electromagnetic coil 200; a conical concentrator 10013 is fixedly connected to the bottom of the inner cylinder 1001; and an air supply mechanism 600 is arranged on one side of the conical concentrator 10013.

[0063] Furthermore, an overflow area is included, and the overflow area includes:

[0064] The top of the inner cylinder 1001 is fixedly connected to an overflow cylinder 10011, the top of the overflow cylinder 10011 is fixedly connected to an overflow column 10014, the top of the overflow column 10014 is fixedly connected to an overflow weir 100115, the periphery of the overflow column 10014 is fixedly connected to an overflow trough 400, the bottom of the overflow trough 400 is inclined, and an overflow port 4002 is opened on one side of the lower part;

[0065] Optionally, the side wall of the overflow tube 10011 is formed into an inverted frustum structure, and the cross section gradually increases from bottom to top.

[0066] Optionally, the side wall of the overflow tube 10011 forms a cylindrical structure.

[0067] Furthermore, if Figures 4 to 18 As shown, the side wall of the overflow tube 10011 and / or the overflow column 10014 has a sandwich cavity 100111 structure.

[0068] The interlayer cavity 100111 is provided with a water inlet for communicating with an external water inlet pipe 100112, and a regulating valve 100113 is provided on the water inlet pipe 100112; a plurality of interlayer water outlet holes 1001111 are provided on the side wall of the interlayer cavity 100111 close to the axis of the inner tube 1001; the water inlet pipe 100112 can be connected with an external water source or gas source.

[0069] Preferably, a plurality of interlayer water outlet holes 1001111 are arranged in a direction forming an acute angle with the horizontal or in a horizontally symmetrical direction, so as to generate a flushing water flow or a flushing air flow that rises in a spiral along the wall.

[0070] Preferably, the interlayer water outlet hole 1001111 is provided with a guide plate 100114 and / or a guide tube 100116 ; the interlayer water outlet hole 1001111 is a hole cooperating with the guide tube 100116 or a slit cooperating with the guide plate 100114 .

[0071] like Figure 4 , 8 , 12, 15 are partial side sectional schematic diagrams of several different structures of overflow areas with guide plates or guide pipes, such as type 1, type 2, type 3, type 4, etc., given in embodiments of the present invention.

[0072] Preferably, the symmetry axis of the guide plate 100114 or the guide tube 100116 has a tangential angle of 0 to 15 degrees with the circular cross section of the overflow weir 100115 and an angle of 0 to 15 degrees with the circular cross section of the overflow weir 100115; and is used to generate an upwardly inclined water flow or air flow to rotate the overflow surface;

[0073] Preferably, a locking device 1001141 is provided at the root of the guide plate 100114 or the guide tube 100116 for adjusting the jet angle.

[0074] The pressurized water flow or air flow is introduced into the interlayer cavity 100111 through the water inlet pipe 100112 and the regulating valve 100113, and the upward impulse and centrifugal force generated in the top overflow area by the guide plate 100114 and / or the guide pipe 100116 form a spiral upward slurry flow, which helps the coarse particle impurities and flotation foam in the slurry to cross the overflow weir 100115 and enter the overflow tank 400.

[0075] Further, the interlayer cavity 100111 is a spiral cavity structure that spirally ascends along the side wall of the overflow tube 10011 and / or the overflow column 10014, or is a completely hollow structure;

[0076] When the interlayer cavity 100111 is a spiral cavity structure, a blocking weir 1001113 corresponding to the interlayer water outlet hole 1001111 is provided on the side wall of the interlayer cavity 100111 close to the axis of the inner tube 1001.

[0077] The retaining weir 1001113 facilitates the collection of coarse tailings and medium ore that settle before overflow for centralized recovery.

[0078] Furthermore, a medium ore discharge mechanism is connected to the low point of the blocking weir 1001113.

[0079] Furthermore, the intermediate ore discharge mechanism comprises: an intermediate ore outlet pipe and an intermediate ore valve pump which are fixedly connected in sequence; the intermediate ore valve pump is connected to the interlayer cavity 100111;

[0080] The intermediate mining valve pump is a solenoid valve, or an electric regulating valve, or an intermediate mining pump.

[0081] Adding a blocking weir on the side of the interlayer cavity close to the axis of the cylinder can effectively block the sinking return path of the coarse ore particles in the tailings, and the coarse ore particles in the tailings can be regularly discharged by periodically switching the valve pump in the tailings.

[0082] Furthermore, if Figures 1 to 3 As shown, a feeder 3007 is provided in the upper part of the axis of the inner cylinder 1001; the feeder 3007 is fixed in the upper part of the axis of the overflow trough 400; the top of the feeder 3007 is not lower than the overflow trough 400 or the overflow weir 100115; the bulk material opening at the bottom of the feeder 3007 is placed inside the inner cylinder 1001 higher than the top of the balance column (10012); one side of the feeder 3007 is connected to the feeding mechanism 300.

[0083] The function of the balance column is to occupy the lower axial area of ​​the inner drum feeder, where there are "magnetic voids" and water vortices, which improve the mineral processing indicators.

[0084] Furthermore, if Figures 19 to 22 As shown, the feeding mechanism 300 includes: a storage box 3002, a feed pipe 3006 and a feeder 3007; the feed pipe 3006 is an L-shaped structure, whose upper opening is fixedly connected to the lower opening of the storage box 3002, and whose side opening is fixedly connected to the side opening of the feeder 3007.

[0085] Furthermore, the storage box 3002 includes: a support leg 3001, the bottom of the support leg 3001 is fixedly connected to the top of the overflow trough 400, and the top of the support leg 3001 is fixedly connected to the storage box 3002; a support frame 3003 is fixedly connected to one side of the storage box 3002, a servo motor 3004 is fixedly connected to the top of the support frame 3003, and a power output shaft 3005 is fixedly connected to the bottom of the servo motor 3004; the power output shaft 3005 rotates through the top of the support frame 3003 and the top plate of the storage box 3002, and is rotatably connected to the inner side of the bottom plate of the storage box 3002; the power output shaft 3005 is located at the top of the support frame 3003 and the top of the storage box 3002 The part between the plates is fixedly connected with the first gear 3008; the part of the power output shaft 3005 located in the storage box 3002 is provided with a first agitator 3009; one side of the first gear 3008 is meshedly connected with the second gear 30092, the second gear 30092 is fixedly connected with a rotating rod 30093, and the part of the rotating rod 30093 located in the storage box 3002 is provided with a second agitator 30094; the part of the rotating rod 30093 located above the second gear 30092 is fixedly connected with a cam 30091; a feed port is provided on one side of the storage box 3002; a positioning rod 30098 is fixedly connected to the middle part of one side of the storage box 3002.

[0086] Furthermore, the feeding tube 3006 includes: a fixed frame 30095 is fixedly connected to the front and rear sides of the feeding tube 3006, a sliding rod 300991 is fixedly connected inside the fixed frame 30095, a sealing plate 30097 is slidably connected to one end of the sliding rod 300991, a sliding groove is provided inside the feeding tube 3006, the sealing plate 30097 is slidably connected to the sliding groove, a spring 300992 is sleeved on the outer periphery of the sliding rod 300991, a connecting frame 30096 is fixedly connected to one end of the sealing plate 30097, the connecting frame 30096 is provided with a positioning hole 300981 which is slidably connected to the positioning rod 30098, and a sliding push plate 30099 is fixedly connected to the top of the connecting frame 30096; one side of the spring 300992 is connected to the sealing plate 30097, and the other side of the spring 300992 is connected to the fixed frame 30095.

[0087] Furthermore, the cam 30091 and the push plate 30099 are arranged in the same plane and can produce horizontal reciprocating linkage: when the protruding side of the cam 30091 rotates and contacts the push plate 30099, it can gradually push the push plate 30099 to move toward the outside of the lower material tube 3006, driving the sealing plate 30097 to move toward the outside of the lower material tube 3006, so that the lower material tube 3006 gradually changes to a conductive state; when the protruding side of the cam 30091 rotates and gradually moves away from the push plate 30099, the spring 300992 can push the sealing plate 30097 to move toward the inside of the lower material tube 3006, so that the lower material tube 3006 gradually changes to a cut-off state.

[0088] like Figures 1 to 3 As shown, a concentrate regulating valve 500 is fixedly connected to the bottom of the conical concentrator 10013; an air supply mechanism 600 is arranged on the periphery of the conical concentrator 10013; a water supply pipe 700 is fixedly connected to the side wall of the outer cylinder 100, the water supply pipe 700 is connected to the inner cylinder 1001, and a water supply valve 701 is fixedly connected to one end of the outer side of the water supply pipe 700, and the water supply valve 701 controls the water supply pipe 700 to inject water into the inner cylinder 1001.

[0089] Preferably, if Figures 1 to 3 , Fig.23 As shown, the gas supply mechanism 600 includes a bubble generating device 601 , a gas supply pipe 602 , a gas supply valve 604 and a high-pressure gas source 603 .

[0090] The bubble generating device 601 is inserted and connected to the side wall of the conical concentrator 10013, and the air outlet at one end is placed inside the conical concentrator 10013 and / or the lower part of the inner cylinder (1001), and the other end is fixedly connected to the air supply pipe 602 outside the conical concentrator 10013, and the depth of the bubble generating device 601 inserted into the conical concentrator 10013 can be adjusted; one side of the air supply pipe 602 is fixedly connected to one end of the air supply valve 604, and the other end of the air supply valve 604 is connected to the high-pressure air source 603.

[0091] Preferably, a plurality of bubble generating devices 601 are provided, which are respectively inserted and connected to the side walls of the conical concentrator 10013 .

[0092] Preferably, the air outlet of the bubble generating device 601 extends deep into the bottom area inside the inner cylinder 1001 .

[0093] Preferably, the length of each bubble generating device 601 is determined according to the position of the air outlet hole penetrating into the bottom area inside the inner cylinder 1001 .

[0094] Furthermore, the present invention also includes a tailings pipeline, a slurry separator and a slurry pump connected in sequence; the tailings slurry discharged from the overflow port 4002 flows through the tailings pipeline through the slurry separator to form tailings water, which is pumped into the water inlet pipe 100112 by the slurry pump and returns to the interlayer cavity 100111, thereby realizing the recycling of tailings water.

[0095] Furthermore, the magnetic field generated by the electromagnetic coil 200 acts in the opposite direction to the buoyancy, guiding the strong magnetic minerals to settle downward and the weak magnetic or non-magnetic minerals to overflow upward;

[0096] Preferably, the electromagnetic coils 200 are multiple groups, and the multiple groups of electromagnetic coils 200 are powered on and off according to a certain rule to generate a pulsating magnetic field in a downward direction.

[0097] In actual operation, when this device is used, first, the slurry is put into the storage box 3002 through the feed port set on one side of the storage box 3002, and the servo motor 3004 drives the first gear 3008 and the first agitator 3009 fixedly connected to the power output shaft 3005 to rotate. When the first gear 3008 rotates, the second gear 30092 drives the rotating rod 30093 and the second agitator 30094 to rotate, and the slurry can be stirred under the action of the first agitator 3009 and the second agitator 30094. The stirring can enhance the fluidity of the slurry, make the bubbles in the slurry better dispersed, increase the contact opportunity between the bubbles and the mineral particles, help the mineral particles and the bubbles in the slurry to be fully mixed, and improve the flotation efficiency.

[0098] The rotating rod 30093 rotates while driving the cam 30091 to rotate, and the cam 30091 squeezes the push plate 30099. When the push plate 30099 is squeezed, it slides axially along the positioning rod 30098 and drives the sealing plate 30097 to move. When the sealing plate 30097 moves, it slides axially along the sliding rod 300991 and squeezes the spring 300992. The final ore pulp is evenly transported to the feeder 3007 through the feeder pipe 3006, and the mineral to be selected is fed into the inner cylinder 1001 of the washing cylinder through the feeder 3007. When the cam 30091 releases the squeeze on the push plate 30099, the sealing plate 30097 can be driven to move axially along the slide rod 300991 toward the inner side of the feeder pipe 3006 under the elastic action of the spring 300992, and the sealing plate 30097 drives the connecting frame 30096 to move.

[0099] Under the action of gravity and feeder 3007, the ore pulp falls into the inner cylinder 1001 and begins to be dispersed and mixed initially. During the downward flow of the minerals in the inner cylinder 1001, they are affected by the magnetic field generated by the electromagnetic coil 200. The strongly magnetic minerals move downward under the action of the magnetic force, thus achieving preliminary magnetic separation.

[0100] The conical concentrator 10013 at the bottom of the inner tube 1001 is connected to a bubble generating device 601, which is connected to an external gas source such as a high-pressure gas source 603 through an air supply pipe 602 and an air supply valve 604. When the high-pressure gas enters the bubble generating device 601 through the air supply pipe 602 and the air supply valve 604, the bubble generating device 601 will generate a large number of tiny bubbles, which rise in the ore pulp and adhere to the hydrophobic ore particles to form flotation foam.

[0101] During the rising process of flotation foam, due to the combined effect of the magnetic field and the buoyancy of bubbles, the upward movement of strongly magnetic mineral particles entrained and adhered by bubbles is suppressed, the detached bubbles are adsorbed back to the bottom to become concentrate, and the remaining mineral particles overflow with the bubbles, and the pulp particles are further separated. The cross-section of the overflow cylinder 10011 structure at the top of the inner cylinder 1001 gradually increases upward to form an inverted truncated cone shape. The interior of the truncated cone structure is designed as an interlayer cavity 100111, which is connected to the external water source through the water supply pipe 700 and the water supply valve 701. When the pressurized water flows into the interlayer cavity 100111 through the water supply pipe 700 and the water supply valve 701, they will spiral up along the cylinder wall of the truncated cone structure. The spirally rising flushing water or airflow forms a strong rotating flow field in the overflow area at the top of the washing cylinder. The upward impulse and centrifugal force generated by the rotating flow field help the coarse particle impurities and flotation foam in the slurry to cross the overflow weir 100115 and enter the overflow tank 400. In this process, the tailings are effectively washed and the flotation foam is also effectively separated.

[0102] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0103] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic flotation column with tailings washing function, comprising an inner cylinder (1001), characterized in that: An electromagnetic coil (200) is fixedly connected to the periphery of the inner cylinder (1001); An outer cylinder (100) is disposed on the periphery of the electromagnetic coil (200); A conical concentrator (10013) is fixedly connected to the bottom of the inner cylinder (1001).

2. The magnetic flotation column with tailings washing function according to claim 1, characterized in that: Also included is an overflow area, the overflow area comprising: The top of the inner cylinder (1001) is fixedly connected to an overflow cylinder (10011), the top of the overflow cylinder (10011) is fixedly connected to an overflow column (10014), the top of the overflow column (10014) is fixedly connected to an overflow weir (100115), the periphery of the overflow column (10014) is fixedly connected to an overflow trough (400), the bottom of the overflow trough (400) is inclined, and an overflow port (4002) is opened on one side of the lower part; The side wall of the overflow tube (10011) forms an inverted frustum structure, and the cross section gradually increases from bottom to top; or, the side wall of the overflow tube (10011) forms a cylindrical structure.

3. The magnetic flotation column with tailings washing function according to claim 2, characterized in that: The side wall of the overflow tube (10011) and / or the overflow column (10014) has a sandwich cavity (100111) structure; The interlayer cavity (100111) is provided with a water inlet for communicating with an external water inlet pipe (100112), and a regulating valve (100113) is provided on the water inlet pipe (100112); A plurality of interlayer water outlet holes (1001111) are arranged on the side wall of the interlayer cavity (100111) close to the axis of the inner tube (1001); The water inlet pipe (100112) can be connected to an external water source or gas source; The plurality of interlayer water outlet holes (1001111) are arranged in a direction forming an acute angle with the horizontal or in a horizontally symmetrical direction, so as to generate a flushing water flow or flushing air flow that rises in a spiral along the wall.

4. The magnetic flotation column with tailings washing function according to claim 3, characterized in that: The interlayer water outlet hole (1001111) is provided with a guide plate (100114) and / or a guide pipe (100116); The interlayer water outlet hole (1001111) is an orifice matched with the guide tube (100116) or a slit matched with the guide plate (100114); The root of the guide plate (100114) or the guide tube (100116) is provided with a locking device (1001141) for adjusting the jet angle; A pressurized water flow or air flow is introduced into the interlayer cavity (100111) through the water inlet pipe (100112) and the regulating valve (100113), and the upward impulse and centrifugal force generated in the top overflow area by the guide plate (100114) and / or the guide pipe (100116) form a spirally rising slurry flow, which helps the coarse particle impurities and flotation foam in the slurry to cross the overflow weir (100115) and enter the overflow tank (400).

5. The magnetic flotation column with tailings washing function according to claim 4, characterized in that: The interlayer cavity (100111) is a spiral cavity structure that rises in a spiral along the side wall of the overflow tube (10011) and / or the overflow column (10014), or is a completely hollow structure; When the interlayer cavity (100111) is a spiral cavity structure, a blocking weir (1001113) corresponding to the interlayer water outlet hole (1001111) is provided on the side wall of the interlayer cavity (100111) close to the axis of the inner cylinder (1001); A medium ore discharge mechanism is provided at the low point of the blocking weir (1001113), and the medium ore discharge mechanism comprises: a medium ore outlet pipe and a medium ore valve pump which are fixedly connected in sequence; the medium ore valve pump is in communication with the interlayer cavity (100111); The intermediate mining valve pump is a solenoid valve, or an electric regulating valve, or an intermediate mining pump.

6. The magnetic flotation column with tailings washing function according to claim 2, characterized in that: A feeder (3007) is provided at the upper part of the axis of the inner cylinder (1001); The feeder (3007) is fixed to the upper part of the axis of the overflow trough (400); the top of the feeder (3007) is not lower than the overflow trough (400) or the overflow weir (100115); the bulking port at the bottom of the feeder (3007) is placed inside the inner tube (1001) and higher than the top of the balance column (10012); One side of the feeder (3007) is connected to the feeding mechanism (300); The feeding mechanism (300) comprises: a storage box (3002), a feeding pipe (3006) and a feeder (3007); The feed pipe (3006) is an L-shaped structure, the upper opening of which is fixedly connected to the lower opening of the storage box (3002), and the side opening of which is fixedly connected to the side opening of the feeder (3007).

7. The magnetic flotation column with tailings washing function according to claim 6, characterized in that: The material storage box (3002) comprises: a support leg (3001), the bottom of the support leg (3001) is fixedly connected to the top of the overflow trough (400), and the top of the support leg (3001) is fixedly connected to the material storage box (3002); a support frame (3003) is fixedly connected to one side of the material storage box (3002), a servo motor (3004) is fixedly connected to the top of the support frame (3003), and a power output shaft (3005) is fixedly connected to the bottom of the servo motor (3004); the power output shaft (3005) rotates through the top of the support frame (3003) and the top plate of the material storage box (3002), and is rotatably connected to the inner side of the bottom plate of the material storage box (3002); the power output shaft (3005) is located between the top of the support frame (3003) and the material storage box (3002). ) is fixedly connected to a first gear (3008) at a portion between the top plates; a first agitator (3009) is provided at a portion of the power output shaft (3005) located inside the material storage box (3002); a second gear (30092) is meshedly connected to one side of the first gear (3008), a rotating rod (30093) is fixedly connected to the second gear (30092), and a second agitator (30094) is provided at a portion of the rotating rod (30093) located inside the material storage box (3002); a cam (30091) is fixedly connected to a portion of the rotating rod (30093) located above the second gear (30092); a feed port is provided at one side of the material storage box (3002); a positioning rod (30098) is fixedly connected to a middle portion of a side surface of the material storage box (3002); The feeding tube (3006) comprises: a fixing frame (30095) fixedly connected to the front and rear sides of the feeding tube (3006); a sliding rod (300991) fixedly connected inside the fixing frame (30095); a sealing plate (30097) slidably connected to one end of the sliding rod (300991); a sliding groove is provided inside the feeding tube (3006); the sealing plate (30097) is slidably connected to the sliding groove; a spring (30099) is sleeved on the outer periphery of the sliding rod (300991); 2), one end of the sealing plate (30097) is fixedly connected to a connecting frame (30096), the connecting frame (30096) is provided with a positioning hole (300981) that is slidably connected to the positioning rod (30098), and the top of the connecting frame (30096) is fixedly connected to a sliding plate (30099); one side of the spring (300992) is connected to the sealing plate (30097), and the other side of the spring (300992) is connected to the inside of the fixing frame (30095); The cam (30091) and the push plate (30099) are arranged in the same plane and can generate horizontal reciprocating linkage: when the protruding side of the cam (30091) rotates and contacts the push plate (30099), it can gradually push the push plate (30099) to move toward the outside of the lower material tube (3006), drive the sealing plate (30097) to move toward the outside of the lower material tube (3006), so that the lower material tube (3006) gradually changes to a conducting state; when the protruding side of the cam (30091) rotates and gradually moves away from the push plate (30099), the spring (300992) can push the sealing plate (30097) to move toward the inside of the lower material tube (3006), so that the lower material tube (3006) gradually changes to a cut-off state.

8. The magnetic flotation column with tailings washing function according to claim 1, characterized in that: A concentrate regulating valve (500) is fixedly connected to the bottom of the conical concentrator (10013); an air supply mechanism (600) is arranged on the periphery of the conical concentrator (10013); a water supply pipe (700) is fixedly connected to the side wall of the outer cylinder (100); the water supply pipe (700) is connected to the inner cylinder (1001); a water supply valve (701) is fixedly connected to one end of the outer side of the water supply pipe (700), and the water supply valve (701) controls the water supply pipe (700) to inject water into the inner cylinder (1001).

9. The magnetic flotation column with tailings washing function according to claim 8, characterized in that: The conical concentrator (10013) is provided with an air supply mechanism (600); The air supply mechanism (600) comprises a bubble generating device (601), an air supply pipe (602), an air supply valve (604) and a high-pressure air source (603); The bubble generating device (601) is inserted and connected to the side wall of the conical concentrator (10013), the air outlet at one end is placed inside the conical concentrator (10013) and / or at the lower part of the inner cylinder (1001), and the other end is fixedly connected to the air supply pipe (602) outside the conical concentrator (10013), and the depth of the bubble generating device (601) inserted into the conical concentrator (10013) can be adjusted; One side of the air supply pipe (602) is fixedly connected to one end of the air supply valve (604), and the other end of the air supply valve (604) is connected to the high-pressure air source (603); The bubble generating devices (601) are provided in plurality and are respectively inserted and connected to the side wall of the conical concentrator (10013); The air outlet of the bubble generating device (601) extends deep into the bottom area inside the inner cylinder (1001); The length of each of the bubble generating devices (601) is determined according to the position of the air outlet hole deep into the bottom area inside the inner cylinder (1001).

10. The magnetic flotation column with tailings washing function according to claim 3, characterized in that: It also includes a tailings pipeline, a slurry separator and a slurry pump which are connected in sequence; the tailings slurry discharged from the overflow port (4002) flows through the tailings pipeline through the slurry separator to form tailings water, which is pumped into the water inlet pipe (100112) through the slurry pump and returns to the interlayer cavity (100111); The magnetic field generated by the electromagnetic coil (200) acts in the opposite direction to the buoyancy, guiding the strong magnetic minerals to settle downward and the weak magnetic or non-magnetic minerals to overflow upward; The electromagnetic coils (200) are multiple groups, and the multiple groups of electromagnetic coils (200) are powered on and off according to a certain rule to generate a pulsating magnetic field with a downward direction.

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