CN109746117B - Low-frequency ac electromagnetic elutriation machine - Google Patents
Low-frequency ac electromagnetic elutriation machine Download PDFInfo
- Publication number
- CN109746117B CN109746117B CN201910198699.XA CN201910198699A CN109746117B CN 109746117 B CN109746117 B CN 109746117B CN 201910198699 A CN201910198699 A CN 201910198699A CN 109746117 B CN109746117 B CN 109746117B
- Authority
- CN
- China
- Prior art keywords
- ore
- magnetic field
- washing
- field coil
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a low-frequency alternating current electromagnetic elutriation machine, which comprises: the magnetic separation device comprises a collecting magnetic field coil sleeved at the top of the periphery of the washing and separating cylinder, and a plurality of traveling wave magnetic field coils positioned below the collecting magnetic field coil, wherein the collecting magnetic field coil is fed with single-phase low-frequency alternating current, the traveling wave magnetic field coil is fed with three-phase low-frequency alternating current, the wiring mode of the traveling wave magnetic field coil is Y-shaped or delta-shaped, and the frequency of the low-frequency alternating current is lower than 50Hz; an induction magnetic ring is arranged in the washing and selecting cylinder at a position corresponding to the ore gathering magnetic field coil; the overflow inner cylinder has the same diameter as the washing cylinder; the ore outlet of the ore feeding device is arranged in the middle between the first travelling wave magnetic field coil and the second travelling wave magnetic field coil, and the distance between the inner wall of the washing cylinder and the outer wall of the ore feeding tube is arranged in the middle; the water supply device is arranged on the concentrate cone below the washing and separating cylinder. The low-frequency alternating current electromagnetic elutriator has the advantages of high concentrate grade, good separation effect and wide application range.
Description
Technical Field
The invention relates to the technical field of magnetic separation equipment, in particular to a low-frequency alternating current electromagnetic elutriation machine which is high in quality and efficiency, energy-saving and environment-friendly.
Background
At present, magnetic separation equipment such as a cylinder type magnetic separator, a magnetic desliming groove and the like is commonly adopted in domestic magnetic separation factories. The equipment has higher magnetic field intensity and magnetic field force, and has strong magnetic agglomeration on the separation of magnetite. Therefore, the prior disadvantages of 'magnetic inclusion' and 'non-magnetic inclusion' exist, so that the concentrate contains more gangue and the grade of the concentrate is seriously influenced. In addition, the magnetic separation equipment has long and complex process flow, excessive circulation quantity of middling, high water resource consumption and high beneficiation cost. The method is contrary to the current environment-friendly mine concept of improving quality, enhancing efficiency, saving energy and reducing consumption. In order to solve the magnetic and non-magnetic impurities of the conventional magnetic separation equipment, an economic and effective ore dressing means is adopted to obtain high-grade magnetite concentrate or ultrapure magnetite concentrate, therefore, various development units do a great deal of work, such as increasing the pole number of a barrel type magnetic separator, improving the rolling times of concentrate powder, properly reducing the magnetic field intensity of a concentrate end, adding flushing water in a weak magnetic area of an ore discharging end, adding a vibration device, a pulsating magnetic field, a rotating magnetic field magnetic separator and the like, but the various methods have little effect on improving the concentrate grade, so that the development of the magnetic separation equipment with the characteristics of quality improvement, efficiency enhancement, energy conservation and environmental protection becomes the current primary task.
Currently, the traditional electromagnetic elutriation machine generally adopts an overflow weir with the diameter larger than that of a washing barrel, when the concentrate amount in tailings is reduced, the overflow weir with the diameter increased is large in caliber and low in flow speed, non-magnetic minerals are extremely easy to hover or sink, so that non-magnetic tailings are not smoothly discharged, the washing environment in the barrel is continuously deteriorated, the concentrate grade is seriously influenced, the water flow is increased, the water flow speed in the washing barrel is extremely easy to be increased, a considerable part of micro-fine concentrate rises to the joint of the washing barrel and the overflow weir along with the water flow, the concentrate with a slightly larger granularity hovers from the joint, and when the ore feeding or water feeding fluctuation is larger, the concentrate in a suspension area is discharged into the tailings, the ore leakage is serious, and the resource waste is caused. When ore feeding or water feeding fluctuation is small, the non-magnetic tailings in the suspension area sink into the washing and selecting cylinder, so that the washing environment in the cylinder is destroyed, the concentrate grade is unstable, and the product quality is influenced; the overflow weir with reduced diameter only improves the water flow speed at the position of the overflow port, so that the pressure difference of the area in the washing and selecting cylinder below the joint of the overflow port and the cylinder body is small, the speed of the rising water flow is slowed down, the concentrate and the non-magnetic ore are not thoroughly separated, and the ideal selecting effect cannot be achieved.
In addition, the traditional electromagnetic elutriation machine generally adopts an overlong ore feeding pipe, so that an ore outlet is positioned at the center of a barrel body with the third pulsating exciting coil and the fourth pulsating exciting coil being leveled, the first coil and the second coil at the upper part cannot play a role, and the overlong ore feeding pipe shortens the sedimentation distance of ore pulp, reduces rolling times and reduces concentrate grade. In order to improve the concentrate grade, increase the water consumption, improve the water velocity, the concentrate grade is improved to some extent and the ore run is serious, and a large amount of water resources are wasted. Even if a coil of constant magnetic field is installed at the upper part of the first pulsating magnetic field coil, only concentrate near the cylinder wall is adsorbed due to the limitation of the constant magnetic field characteristic of the coil. This constant magnetic field coil, owing to the attribute problem of direct current power supply, only possess the adsorption function, after concentrate powder is adsorbed, do not possess the ability of rolling, consequently, inside mingle can't be extruded, when adsorbed mineral powder reaches a certain amount, partial mineral powder breaks away from the magnetic field constraint, falls into the washing section of thick bamboo, owing to do not possess and roll, rub with hands washing function, the inside non-magnetism of iron powder mingle falls into in the washing section of thick bamboo together too, causes the destruction to the stable selection environment in the section of thick bamboo, leads to the unstable concentrate grade of output. Meanwhile, the magnetic field gradually decreases from the cylinder wall to the center position in the cylinder, so that the partial area in the cylinder becomes a non-magnetic area and a weak magnetic area, and for the area, when the water flow is larger, the micro-fine ore concentrate rising along with the water flow cannot be adsorbed by the magnetic field, therefore, the constant magnetic field coil has very little effect in a stable separation environment, and when the fluctuation of the water flow or ore pulp is larger, the decisive ore control effect is not achieved, and ore leakage is caused. The lower end of the ore feeding pipe is uniformly distributed with ore distribution openings along the circumferential direction, the ore distribution mode is to feed ore in a mode of coinciding with the axis of the washing and selecting cylinder, when ore pulp reaches the bottom of the ore feeding pipe, the ore distribution openings uniformly distributed in the direction perpendicular to the axis flow into ascending water flow, the ore distribution openings are far away from the inner cylinder wall, the constraint force of a magnetic field on the ore pulp is weak, a magnetic linkage is basically not formed in the area, a magnetic rolling effect is not generated, and the unreasonable ore distribution position, mode and overlong ore feeding pipe cause too short sedimentation distance are one of key factors influencing the quality of ore concentrate.
Secondly, the water inlets of the traditional electromagnetic elutriation machine are uniformly distributed on the horizontal circumference of the lower part of the washing barrel, holes are directly formed in the horizontal circumference, so that water flow entering the barrel is in a disordered state, concentrate which is settled to the moment is disturbed and scattered again, and extremely large damage is caused to enriched concentrate, even if the lower part of the water inlets is provided with an enriched ore gathering coil with a constant magnetic field, the enriched ore gathering coil is difficult to adsorb concentrate powder in the center of the washing barrel, and good enrichment is not achieved. Therefore, the water inlet is arranged at the position and the mode of arranging the water inlet is not suitable; the water supply mouth is arranged in the horizontal area of the fourth coil and the fifth coil, a water pipe is connected to the position, perpendicular to the axis of the washing and selecting cylinder, of the washing and selecting cylinder from the outside of the washing and selecting cylinder, then a water inlet pipe which is overlapped with the axis of the washing and selecting cylinder is connected to the horizontal area of the fourth coil and the fifth coil, the top of the water inlet pipe is blocked, water diversion pipes are horizontally and uniformly distributed on the circumference of the upper part of the water inlet pipe, a plurality of water outlets are uniformly and uniformly distributed on the horizontal plane of the same side of each water diversion pipe, so that water flow is in a rising spiral state, and as the grade reaches an ideal state when concentrate enters the area, the key stage of enriching ore is that the primary enriched concentrate powder is scattered again due to the disturbance of the rising spiral water flow, and the primary enriched concentrate powder is unfavorable for gathering ore. In addition, the rule of gradually improving the water quality condition from top to bottom in the water distribution destruction cylinder in the area shows that the water quality in the water supply area is optimal, the lower area is inferior, and the top area is worst, so that the treated concentrate is polluted again.
In addition, the power supply of the traditional electromagnetic elutriator adopts direct current excitation, and alternating pulsating magnetic fields are generated among coils through alternating energization of a silicon controlled rectifier, for example, when 1, 3 and 5 coils are energized simultaneously, concentrate powder located at the coils forms flux linkages, concentrate powder located in a fixed magnetic field only forms flux linkages, concentrate particles are relatively motionless, non-magnetic inclusions in the concentrate cannot be rubbed and separated out, when the power supply is off, the flux linkages disappear, the concentrate powder continuously sinks, and a part of the fine concentrate powder is discharged into tailings along with ascending water flow and non-magnetic matters of middle and fine particle grades under the condition of no magnetic field adsorption. 2. When the coils 4 and 6 are electrified, concentrate particles rotate 180 degrees from the state in the previous magnetic field period, a magnetic chain is formed again, the electrified intervals of the two groups of coils are different in interval time due to different sorting environments, the approximate range is 1-6 seconds, the magnetic rolling effect is realized repeatedly, and meanwhile, a large amount of fine particle concentrate powder is thrown to tailings in the interval non-magnetic empty window period, so that a large amount of resources are wasted.
In addition, since the properties of ores are different due to the difference between the earth surface and the underground region, there are differences between easy ore dressing and difficult ore dressing. The emphasis of each concentrating mill is also different for differences in ore properties. On the premise of the set concentrate grade, the tail is controlled as much as possible, and the ore run is controlled. And the most possible refining is difficult to concentrate. Because of the difference of ore properties, the emphasis points of ore dressing are different, and the emphasis points are different, so that the elutriator must have a large magnetic field adjusting range and the number of times of rolling and scrubbing functions matched with the large magnetic field adjusting range, however, the magnetic field adjusting range of the traditional direct current electromagnetic elutriator is narrow, the traditional direct current electromagnetic elutriator does not have the scrubbing function, the ore dressing requirement with huge difference cannot be met, and the ore dressing index cannot meet the customer requirement.
Disclosure of Invention
In view of this, the technical problems to be solved by the present invention are: the low-frequency alternating current electromagnetic elutriator has the advantages of high concentrate grade and good separation effect.
In order to solve the technical problems, the technical scheme of the invention is as follows: a low frequency ac electromagnetic elutriator comprising: the washing and selecting cylinder is characterized in that a concentrate cone cylinder is arranged at the bottom of the washing and selecting cylinder, an overflow device is arranged at the top of the washing and selecting cylinder, a mineral feeding device extending into the washing and selecting cylinder is arranged on the overflow device, a water supply device for supplying water to the inside of the washing and selecting cylinder is arranged outside the washing and selecting cylinder, a magnetic separation device is arranged on the periphery of the washing and selecting cylinder, and the magnetic separation device comprises a plurality of magnetic field coils which are sleeved on the periphery of the washing and selecting cylinder and are arranged along the axial direction of the washing and selecting cylinder at intervals, and the magnetic field coils are electrified with low-frequency alternating current.
The following are a number of further improvements of the low frequency ac electromagnetic elutriator of the present invention:
the magnetic field coils comprise a mine gathering magnetic field coil positioned at the top and a plurality of traveling wave magnetic field coils positioned below the mine gathering magnetic field coil.
The ore gathering magnetic field coils are connected with single-phase low-frequency alternating current, and the traveling wave magnetic field coils are connected with three-phase low-frequency alternating current.
Wherein the frequency of the three-phase low-frequency alternating current is lower than 50Hz, and the frequency of the single-phase low-frequency alternating current is lower than 50Hz.
Wherein, further, the frequency range of the three-phase low-frequency alternating current is 0.1-20Hz, and the frequency range of the single-phase low-frequency alternating current is 0.1-20Hz.
The wiring mode of the traveling wave magnetic field coils is Y-shaped connection or delta-shaped connection.
Wherein, the magnetic separation device still includes: the induction magnetic ring is arranged inside the washing cylinder and corresponds to the position of the ore gathering magnetic field coil.
Wherein, the induction magnetic ring includes: the magnetic ring comprises a plurality of metal rings which are sleeved together and concentrically arranged, wherein a space is reserved between every two adjacent metal rings, reinforcing ribs which are fixedly connected with the adjacent metal rings are arranged at the space, and the adjacent metal rings and the reinforcing ribs jointly enclose a magnetic ring channel.
Wherein the metal ring of the innermost layer is fixed with the ore feeding device.
The axial section of the induction magnetic ring is fusiform.
The induction magnetic ring is made of high magnetic conduction materials.
The overflow device comprises an overflow sleeve and an overflow inner cylinder arranged in the overflow sleeve, wherein the lower end of the overflow inner cylinder is fixedly connected with the top of the washing and selecting cylinder, and the overflow inner cylinder and the washing and selecting cylinder have the same diameter.
Wherein, the ore feeding device includes: the ore feeding pipe, the upper end periphery of ore feeding pipe is fixed with the support arm, the outer end of support arm with overflow arrangement's top is fixed, the bottom of ore feeding pipe seals, the lower extreme periphery of ore feeding pipe is fixed with a plurality of ore distribution pipes that are linked together rather than the inner chamber, the ore outlet of ore distribution pipe is located wash the inside axial position of selecting a section of thick bamboo and from last down the middle part position unanimity between the second, the third magnetic field coil.
The ore outlet of the ore distribution pipe is positioned in the middle of the distance between the inner wall of the washing and selecting cylinder and the outer wall of the ore feeding pipe.
Wherein, a plurality of ore outlet of ore distribution pipe is arranged along tangential direction.
The ore distribution pipe comprises a radial section and a tangential section connected with the outer end of the radial section, the other end of the tangential section is an ore outlet, and the inner end of the radial section is fixedly connected with the periphery of the lower end of the ore feeding pipe and is communicated with an inner cavity of the ore feeding pipe.
Wherein the radial section of the ore distribution pipe is arranged obliquely downwards relative to the ore feeding pipe.
Wherein, the periphery of the upper end of the ore feeding pipe is fixed with an ore feeding pipe communicated with the inner cavity of the ore feeding pipe.
Wherein the top of the ore feeding pipe is open.
Wherein, the water supply device includes: the water jacket is annularly arranged at the upper end of the outer wall of the concentrate cone, and a plurality of jet pipes communicated with the inner cavity of the water jacket are arranged at the upper end of the inner wall of the concentrate cone.
The water outlet direction of the jet pipe is tangentially arranged and is consistent with the ore outlet direction of the ore feeding device.
Wherein, the jet pipe is provided with one layer, or two layers or more than two layers are arranged up and down, each layer comprises a plurality of jet pipes; the jet pipe positions of adjacent layers are staggered.
After the technical scheme is adopted, the beneficial effects of the invention are as follows:
because the magnetic field coil of the low-frequency alternating current electromagnetic elutriator is electrified with low-frequency alternating current, when the magnetic field coil is electrified, concentrate powder in an alternating magnetic field not only forms magnetic links, but also can move relatively among concentrate particles, and has the functions of overturning and scrubbing, so that non-magnetic inclusions in the concentrate are separated out, the grade of the concentrate is improved, and the separation effect is good; meanwhile, compared with a direct current alternating current power supply mode, the low-frequency alternating current power supply mode is adopted for excitation, a non-magnetic empty window period does not exist, a large amount of fine particle concentrate powder is prevented from being thrown to tailings, and resource waste is avoided.
Because the induction magnetic ring is arranged at the position corresponding to the ore gathering magnetic field coil in the washing and selecting cylinder, after the ore gathering magnetic field coil is electrified, the magnetic field is induced on the induction magnetic ring in the washing and selecting cylinder, so that the magnetic field force around the outer wall of the ore feeding device is improved, and the problem of ore leakage along the outer wall of the ore feeding device due to the fact that water flow or ore pulp fluctuation is large is solved. Meanwhile, periodic low-frequency alternating current is introduced into the ore collecting magnetic field coil, so that the concentrate powder adsorbed on the induction magnetic ring is adsorbed by the induction magnetic ring and also has periodic geomagnetic rolling, and the concentrate powder is rubbed and rubbed with each other to continuously extrude the non-magnetic ore mixed in the concentrate powder and is carried out by ascending water flow, so that the concentrate powder adsorbed on the induction magnetic ring is more and more absorbed along with stable water supply and ore feeding, when a certain amount of concentrate powder is reached, part of the concentrate powder is re-immersed in the washing and selecting cylinder, and the concentrate powder adsorbed on the induction magnetic ring has magnetic rolling, rubbing and scrubbing functions due to the relation of the low-frequency alternating current excitation magnetic field characteristics, so that the mineral powder falling into the washing and selecting cylinder loses the condition of non-magnetic inclusion, and therefore, the stable sorting environment in the cylinder is not damaged, and the concentrate grade is more stable.
The axial cross section of the induction magnetic ring is fusiform, the height of the metal ring is higher from the outer ring to the inner ring, the area is larger, the outer ring metal ring close to the washing cylinder wall can reach a magnetic saturation state more easily, the inner ring metal ring cannot be blocked by a magnetic field, the structure is favorable for uniformly distributing the magnetic field, the magnetic field forms a magnetic curtain in the area of the induction magnetic ring, and the phenomenon that middle-and-rich living bodies with magnetism and monomer concentrate escape from a weak magnetic area to tailings to cause ore leakage is avoided.
Because the frequency of the low-frequency alternating current is lower than the frequency of the power frequency alternating current by 50Hz, in the magnetic separation process, concentrate grains have enough time to swing to enough swing in a certain overturning state, and favorable conditions are created for thoroughly separating out the internal nonmagnetic inclusions. For different ore properties, the desired rolling times and scrubbing times can be achieved through frequency modulation, so that the concentrate grade and concentrate yield can be effectively and controllably improved.
The wiring mode of the travelling wave magnetic field coil is Y-shaped connection or delta-shaped connection; the Y-shaped connection method can lead the travelling wave magnetic field coil to obtain high exciting current and high magnetic field strength, thereby meeting the requirements of medium and high magnetic field mineral separation; the delta-shaped connection method can enable the traveling wave magnetic field coil to obtain low exciting current and low magnetic field strength, and meets the requirements of weak magnetic field mineral separation; flexible application, wide application range and capability of meeting the ore sorting requirements with huge difference.
The overflow inner cylinder and the washing and selecting cylinder have the same diameter, so that the flow velocity in the washing and selecting cylinder and the flow velocity in the overflow inner cylinder are consistent, and the problem of ore run or nest ore is solved.
Because the axial positions of the ore outlets of the plurality of ore distribution pipes at the periphery of the lower end of the ore feeding pipe are consistent with the middle positions among the second magnetic field coils and the third magnetic field coils from top to bottom, compared with the prior art, the sedimentation distance and the magnetic separation path of mineral powder are prolonged, the magnetic separation time is prolonged, and the concentrate grade is improved. Because the ore outlet of the ore distribution pipe is positioned at the middle part of the distance between the inner wall of the ore washing and selecting cylinder and the outer wall of the ore feeding pipe, the distance is close to the inner wall of the ore washing and selecting cylinder, the travelling wave magnetic field can more effectively interfere the ore dressing, the ore concentrate and lean and weak continuous organisms and the monomer non-magnetic ore are fast carried out in opposite directions, the separation is accelerated, and the ore concentrate grade is improved. Because the ore outlet of a plurality of ore distribution pipes is arranged along the tangential direction and is synchronous with ascending rotary water flow, sinking concentrate powder and ascending water flow are mutually resistant, the sinking speed of the concentrate powder is prevented from being too high, the magnetic separation time is prolonged, and the concentrate grade is improved.
Because concentrate cone inner wall upper end is provided with a plurality of jet pipes that are linked together with the water jacket inner chamber of concentrate cone outer wall upper end, compare in prior art, water supply installation sets up in the concentrate cone of a washing section of thick bamboo below, has reduced water supply installation's position, avoids getting into the rivers in the washing section of thick bamboo and is unordered state to can not disturb and break up and subside the concentrate to washing section of thick bamboo lower part, avoid causing the destructive effect to enriched concentrate, ensure that concentrate enriches smoothly to concentrate cone. Because the water outlet direction of jet pipes is tangential arrangement and is consistent with the ore outlet direction of the ore distributing pipes, when water is introduced, water flow injected into the concentrate cone forms rotary water flow in the cone, the concentrate powder which rolls along with pulsation continuously enters the rotary water flow in the concentrate cone, the concentrate powder is subjected to larger centrifugal force due to the density difference of the water and the concentrate powder, the concentrate powder continuously moves towards the inner wall of the concentrate cone along with the water flow, and finally the concentrate powder slides into the concentrate valve along the inner wall of the concentrate cone positioned at the back of the jet pipes and is discharged into a concentrate pool.
In summary, in the low-frequency alternating current electromagnetic elutriation machine, the plurality of magnetic field coils of the magnetic separation device are electrified with low-frequency alternating current, the travelling wave magnetic field coils adopt a Y-shaped connection method or a delta-shaped connection method, and induction magnetic rings are arranged in the elutriation cylinder corresponding to the positions of the ore gathering magnetic field coils; the periphery of the lower end of a mineral feeding pipe of the mineral feeding device is provided with a plurality of mineral distribution pipes, the axial positions of mineral outlet ports of the mineral distribution pipes are consistent with the middle positions among the second magnetic field coils and the third magnetic field coils from top to bottom, and the radial positions of the mineral outlet ports are arranged at the middle part of the distance between the inner wall of the washing and selecting cylinder and the outer wall of the mineral feeding pipe; the overflow inner cylinder of the overflow device has the same diameter with the washing cylinder; the water supply device is arranged on the concentrate cone below the washing drum; the low-frequency alternating current electromagnetic elutriator provided by the invention realizes the sedimentation, chain connection, rolling, friction and scrubbing impurity removal of concentrate powder under the action of low-frequency alternating current introduced by rising water flow and a magnetic field coil, and finally realizes high-grade ore dressing through enrichment and concentration of rotating water flow, and the ore dressing application range is wide.
Drawings
FIG. 1 is a front cross-sectional view of a low frequency alternating current electromagnetic elutriator in accordance with an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a top view of the inductive magnetic loop of FIG. 1;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a front view of the feeder of FIG. 1;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
FIG. 7 is a front cross-sectional view of the concentrate cone of FIG. 1;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a wiring diagram of the travelling wave magnetic field coil "Y" of FIG. 1;
FIG. 10 is a schematic circuit diagram of FIG. 9;
FIG. 11 is a wiring diagram of the traveling wave magnetic field coil "delta" of FIG. 1;
FIG. 12 is a schematic circuit diagram of FIG. 11;
in the figure: 1-washing and selecting a cylinder; 2-overflow means; 21-overflow inner cylinder; 22-overflow sleeve; 23-a circular bottom plate; 24-tailing mouth; 3-a feeding device; 31-a feeding pipe; 32-a support arm; 33-a mineral inlet pipe; 34-ore distribution pipe; 341-radial segment; 342-tangential segment; 4-inducing a magnetic ring; 41-metal ring; 42-reinforcing ribs; 5-concentrate cone; 51-ore concentrate mouth; 52-valve; 6-jet pipe; 7-water jacket; 71-upper circular plate; 72-lower circular plate; 73-vertical plates; 74-water inlet pipe; 8-an insulating plate; 9-a travelling wave magnetic field coil; 9 A-A first traveling wave magnetic field coil; 9 b-a second travelling wave magnetic field coil; 9 c-a third travelling wave magnetic field coil; 9 d-a fourth traveling wave magnetic field coil; 9 e-fifth line wave magnetic field coils; 9 f-a sixth traveling wave magnetic field coil; 10-mica paper; 11-a mine-gathering magnetic field coil; 12-a non-magnetic conductive metal plate; 13-a protective cover; 14-junction box; 15-fastening bolts.
Detailed Description
The invention is described in further detail below, without limitation, in connection with the figures and examples.
As shown in fig. 1 and 2, the low-frequency ac electromagnetic elutriator of the present invention includes: the ore dressing cylinder 1, the bottom of the ore dressing cylinder 1 is welded and fixed with a concentrate cone cylinder 5, the lower end of the concentrate cone cylinder 5 is provided with a concentrate port 51, and a valve 52 for adjusting the discharge of the ore is arranged at the concentrate port 51; the top of the washing and selecting cylinder 1 is provided with an overflow device 2; the overflow device 2 is provided with a feeding device 3 which extends into the washing barrel 1; a water supply device for supplying water to the inside of the washing and selecting cylinder 1 is arranged outside the washing and selecting cylinder 1; the periphery of a washing and selecting cylinder 1 is provided with a magnetic separation device, the magnetic separation device comprises a plurality of magnetic field coils which are sleeved on the periphery of the washing and selecting cylinder 1 and are arranged at intervals along the axial direction of the washing and selecting cylinder 1 through insulating plates 8, the magnetic field coils are in a circular ring shape, the inner ring of each magnetic field coil is close to the outer wall area of the washing and selecting cylinder 1, a cylindrical mica paper 10 is used as an insulator, each magnetic field coil comprises a collecting magnetic field coil 11 positioned at the top and a traveling wave magnetic field coil 9 positioned below the collecting magnetic field coil 11, the upper part of the collecting magnetic field coil 11 is provided with the insulating plates 8, the upper part of the insulating plates 8 is provided with a non-magnetic conductive metal plate 12 for compressing coils, the outer circle of the non-magnetic conductive metal plate 12 is identical with the outer circle of an upper circular plate 71 of a water jacket 7, a cylindrical protective cover 13 is sleeved between the non-magnetic conductive metal plate 12 and the upper circular plate 71 for avoiding damage to the traveling wave magnetic field coil 9 and the collecting magnetic field coil 11 caused by ore pulp and water, a junction box 14 is fixed outside the protective cover 13, and the junction box 14 is connected with the junction box 14, and low-frequency alternating current is connected.
As shown in fig. 9 to 12, the traveling wave magnetic field coils 9 include a plurality of coils uniformly distributed at equal intervals, and are identified as a first traveling wave magnetic field coil 9a, a second traveling wave magnetic field coil 9b, a third traveling wave magnetic field coil 9c, a fourth traveling wave magnetic field coil 9d, a fifth traveling wave magnetic field coil 9e, and a sixth traveling wave magnetic field coil 9f in order from top to bottom.
Wherein, the travelling wave magnetic field coil 9 is electrified with three-phase low-frequency alternating current, and the ore gathering magnetic field coil 11 is electrified with single-phase low-frequency alternating current. And the frequency of the three-phase low-frequency alternating current is lower than 50Hz, and the frequency of the single-phase low-frequency alternating current is lower than 50Hz, namely, the frequencies of the single-phase low-frequency alternating current are all lower than the frequency of the power frequency alternating current. Preferably, the frequency range of the three-phase low-frequency alternating current is 0.1-20Hz, and the frequency range of the single-phase low-frequency alternating current is 0.1-20Hz.
As shown in fig. 9 and 10, the connection mode of the traveling wave magnetic field coils is a "Y" connection method, namely: the first traveling wave magnetic field coil 9a is connected in series with the fourth traveling wave magnetic field coil 9d, one end of the first traveling wave magnetic field coil is connected with the phase line U, and the other end of the first traveling wave magnetic field coil is connected with a common node; the second traveling wave magnetic field coil 9b is connected with the fifth traveling wave magnetic field coil 9e in series, one end of the second traveling wave magnetic field coil is connected with the phase line V, and the other end of the second traveling wave magnetic field coil is connected with the public node; the third traveling wave magnetic field coil 9c is connected in series with the sixth traveling wave magnetic field coil 9f, one end is connected with the phase line W, and the other end is connected to the common node. The Y-shaped connection method can lead the traveling wave magnetic field coil to obtain high exciting current and high magnetic field intensity, thereby meeting the requirements of medium and high magnetic field mineral separation.
As shown in fig. 11 and 12, the connection mode of the traveling wave magnetic field coils may also adopt a delta connection method, that is: the first traveling-wave magnetic field coil 9a, the second traveling-wave magnetic field coil 9b, the third traveling-wave magnetic field coil 9c, the fourth traveling-wave magnetic field coil 9d, the fifth traveling-wave magnetic field coil 9e and the sixth traveling-wave magnetic field coil 9f are connected in the first place, the node of the first traveling-wave magnetic field coil 9a and the sixth traveling-wave magnetic field coil 9f is connected with the phase line W, the node of the second traveling-wave magnetic field coil 9b and the third traveling-wave magnetic field coil 9c is connected with the phase line U, and the node of the fourth traveling-wave magnetic field coil 9d and the fifth traveling-wave magnetic field coil 9e is connected with the phase line V. By adopting the delta connection method, the traveling wave magnetic field coil can obtain low exciting current and low magnetic field strength, and the requirements of weak magnetic field mineral separation are met.
As shown in fig. 1, wherein the magnetic separation device further includes: the induction magnetic ring 4, such as electrician pure iron or Q235A material, is arranged inside the washing drum 1 and made of high magnetic conductive material, and the induction magnetic ring 4 is sleeved on the ore feeding pipe 31 of the ore feeding device 3, and corresponds to the position of the ore collecting magnetic field coil 11. Preferably, the horizontal axis of the induction magnetic ring 4 coincides with the horizontal axis of the ore-gathering magnetic field coil 11.
As shown in fig. 3 and 4, the induction magnet ring 4 includes: the plurality of metal rings 41 are sleeved together and concentrically arranged, gaps are reserved between the adjacent metal rings 41, reinforcing ribs 42 welded and connected with the adjacent metal rings 41 are arranged at the gaps, and magnetic ring channels are formed between the adjacent metal rings 41 and the adjacent reinforcing ribs 42 in a surrounding mode. Wherein the innermost metal ring 41 is fixed to the feeder tube 31.
The axial cross section of the induction magnetic ring 4 is in a fusiform shape, the height of the metal ring 41 is higher from the outer ring to the inner ring, the area is larger, the outer ring metal ring close to the washing cylinder wall can reach a magnetic saturation state more easily, the inner ring metal ring cannot be blocked by a magnetic field, the magnetic field is favorably distributed, a magnetic curtain is formed in the area of the induction magnetic ring 4 by the magnetic field, and the phenomenon that middle-concentration and rich-concentration organisms with magnetism and monomer concentrate escape from a weak magnetic area to tailings to cause ore leakage is avoided.
As shown in fig. 1, the overflow device 2 comprises an overflow sleeve 22 and an overflow inner cylinder 21 arranged in the overflow sleeve 22, the lower end of the overflow inner cylinder 21 is in fastening sealing connection with the top of the washing cylinder 1 through a flange and a fastening bolt 15, and the overflow inner cylinder 21 has the same diameter as the washing cylinder 1. The overflow inner cylinder 21 is sleeved with a circular bottom plate 23 which is obliquely arranged, the overflow sleeve 22 is vertically arranged along the outer eave of the circular bottom plate 23, a tailing port 24 which is vertical to the overflow sleeve 22 is arranged at the lower end position of the circular bottom plate 23, the upper plane of the overflow sleeve 22 is in a horizontal state and is 50-200 mm higher than the upper plane of the overflow inner cylinder 21, and the two planes are in parallel relation. The overflow inner cylinder 21 has the same diameter as the washing cylinder 1, so that the flow velocity in the washing cylinder 1 is consistent with that in the overflow inner cylinder 21, and the problem of ore run or nest is solved.
As shown in fig. 1, 5 and 6, wherein the ore feeding apparatus 3 includes: the ore feeding pipe 31, the upper end periphery of the ore feeding pipe 31 is fixed with a support arm 32, the outer end of the support arm 32 is welded and fixed with the top of the overflow sleeve 22 of the overflow device 2, the bottom of the ore feeding pipe 31 is sealed, the lower end periphery of the ore feeding pipe 31 is fixed with a plurality of ore distribution pipes 34 communicated with the inner cavity of the ore distribution pipes 31, and the axial position of the ore outlet of the ore distribution pipes 34 in the washing and selecting cylinder 1 is consistent with the middle position between the first traveling wave magnetic field coil 9a and the second traveling wave magnetic field coil 9 b. Wherein the outlet of the ore distribution pipe 34 is positioned at the radial position inside the washing drum 1 at the middle of the distance between the inner wall of the washing drum 1 and the outer wall of the ore feeding pipe 31.
Wherein the ore outlet of the plurality of ore distribution pipes 34 is arranged in a tangential direction. The ore distributing pipe 34 comprises a radial section 341 and a tangential section 342 connected with the outer end of the radial section 341, the other end of the tangential section 342 is an ore outlet, and the inner end of the radial section 341 is fixedly connected with the periphery of the lower end of the ore feeding pipe 31 and is communicated with the inner cavity of the ore feeding pipe.
The radial section 341 of the ore distributing pipe 34 is disposed obliquely downward relative to the ore feeding pipe 31, and this arrangement ensures that the component force in the gravity direction is present, and the ore is smoothly discharged.
Wherein, the top of the feeding pipe 31 is open, which is convenient for maintaining and cleaning ore, and ore can be fed through the top opening. A feeding pipe 33 communicating with the inner cavity of the feeding pipe 31 may be fixedly provided on the outer periphery of the upper end of the feeding pipe 31, and side feeding of the feeding pipe 31 may be achieved by the feeding pipe 33.
As shown in fig. 1, 7 and 8, wherein the water supply device includes: the water jacket 7 is annularly arranged at the upper end of the outer wall of the concentrate cone 5, the water jacket 7 is formed by sealing and welding an upper circular plate 71, a lower circular plate 72 and a middle cylindrical vertical plate 73, and a water inlet pipe 74 is horizontally arranged along the tangential direction of the inner wall of the vertical plate 73; an insulating plate 8 with the outer circle slightly smaller than the upper circular plate 71 is arranged between the upper circular plate 71 and the travelling wave magnetic field coil at the bottommost part; the upper end of the inner wall of the concentrate cone 5 is provided with a plurality of evenly distributed jet pipes 6 communicated with the inner cavity of the water jacket 7, and the jet pipes 6 are close to the bottom of the washing and separating cylinder 1.
Wherein, the water outlet direction of the jet pipe 6 is tangentially arranged and is consistent with the ore outlet direction of the ore distributing pipe 34 of the ore feeding device 3.
Wherein, the jet pipe 6 can be provided with one layer or two or more layers up and down according to the water supply requirement, and each layer comprises a plurality of jet pipes 6; the jet pipes 6 of adjacent layers are preferably staggered, so that uniform water supply is ensured.
The invention relates to a low-frequency alternating current electromagnetic elutriation machine, wherein a plurality of magnetic field coils of a magnetic separation device are electrified with low-frequency alternating current, a travelling wave magnetic field coil 9 adopts a Y-shaped connection method or a delta-shaped connection method, and an induction magnetic ring 4 is arranged in a washing barrel 1 corresponding to a mineral collecting magnetic field coil 11; the periphery of the lower end of the ore feeding pipe 31 of the ore feeding device 3 is provided with a plurality of ore distributing pipes 34, the axial positions of ore outlets of the ore distributing pipes 34 are consistent with the middle positions between the first traveling wave magnetic field coil 9a and the second traveling wave magnetic field coil 9b, the radial positions of the ore outlets are arranged at the middle part of the distance between the inner wall of the washing and selecting cylinder 1 and the outer wall of the ore feeding pipe 31, and the ore distributing positions and ore distributing modes are reasonable; the overflow inner cylinder 21 of the overflow device 2 has the same diameter as the washing cylinder 1, so that the problem of ore run or nest is solved; the water supply device is arranged on the concentrate cone 5 below the washing barrel 1, so that the position of the water supply device is reduced, concentrate which is settled to the lower part of the washing barrel 1 is not disturbed, and the concentrate is ensured to be smoothly enriched to the concentrate cone 5; the low-frequency alternating current electromagnetic elutriator provided by the invention realizes the sedimentation, chain connection, rolling, friction and scrubbing impurity removal of concentrate powder under the action of low-frequency alternating current introduced by rising water flow and a magnetic field coil, and finally realizes high-grade ore dressing through enrichment and concentration of rotating water flow, and the ore dressing application range is wide.
Claims (7)
1. A low frequency ac electromagnetic elutriator comprising: the washing and selecting cylinder is characterized in that the magnetic separation device comprises a plurality of magnetic field coils sleeved on the periphery of the washing and selecting cylinder and arranged at intervals along the axial direction of the washing and selecting cylinder, and the magnetic field coils are fed with low-frequency alternating current;
the magnetic field coils comprise a mine gathering magnetic field coil positioned at the top and a plurality of traveling wave magnetic field coils positioned below the mine gathering magnetic field coil; the ore gathering magnetic field coils are filled with single-phase low-frequency alternating current, and a plurality of traveling wave magnetic field coils are filled with three-phase low-frequency alternating current; the wiring mode of the traveling wave magnetic field coils is Y-shaped connection or delta-shaped connection;
the magnetic separation device further comprises: the induction magnetic ring is arranged inside the washing cylinder and corresponds to the position of the ore gathering magnetic field coil;
the induction magnetic ring comprises: a plurality of metal rings sleeved together and concentrically arranged, wherein a space is reserved between adjacent metal rings, reinforcing ribs fixedly connected with the adjacent metal rings are arranged at the space, and the adjacent metal rings and the reinforcing ribs jointly enclose a magnetic ring channel; the metal ring at the innermost layer is fixed with the ore feeding device;
the axial section of the induction magnetic ring is fusiform;
the induction magnetic ring is made of high magnetic conduction materials.
2. The low frequency ac electromagnetic panning machine of claim 1 wherein the frequency of the three phase low frequency ac is below 50Hz and the frequency of the single phase low frequency ac is below 50Hz.
3. The low frequency ac electromagnetic elutriator of claim 2, wherein the frequency of the three phase low frequency ac is in the range of 0.1-20Hz and the frequency of the single phase low frequency ac is in the range of 0.1-20Hz.
4. The low-frequency alternating current electromagnetic elutriation machine according to claim 1, wherein the overflow device comprises an overflow sleeve and an overflow inner cylinder arranged in the overflow sleeve, the lower end of the overflow inner cylinder is fixedly connected with the top of the washing and selecting cylinder, and the overflow inner cylinder has the same diameter as the washing and selecting cylinder.
5. The low frequency ac electromagnetic elutriator of claim 1, wherein the feeding apparatus comprises: the outer periphery of the upper end of the ore feeding pipe is fixedly provided with a supporting arm, the outer end of the supporting arm is fixed with the top of the overflow device, the bottom of the ore feeding pipe is sealed, the outer periphery of the lower end of the ore feeding pipe is fixedly provided with a plurality of ore distribution pipes communicated with the inner cavity of the ore distribution pipes, and the ore outlet of the ore distribution pipes is positioned in the axial position inside the washing and selecting cylinder and is consistent with the middle position between the second magnetic field coil and the third magnetic field coil from top to bottom;
the ore outlet of the ore distribution pipe is positioned in the middle of the distance between the inner wall of the washing and selecting cylinder and the outer wall of the ore feeding pipe at the radial position inside the washing and selecting cylinder;
the ore outlet of the plurality of ore distribution pipes is arranged along the tangential direction.
6. The low-frequency alternating current electromagnetic elutriation machine according to claim 5, wherein the ore distribution pipe comprises a radial section and a tangential section connected with the outer end of the radial section, the other end of the tangential section is the ore outlet, and the inner end of the radial section is fixedly connected with the periphery of the lower end of the ore feeding pipe and is communicated with the inner cavity of the ore feeding pipe; the radial section of the ore distribution pipe is obliquely arranged downwards relative to the ore feeding pipe;
the periphery of the upper end of the ore feeding pipe is fixedly provided with an ore feeding pipe communicated with the inner cavity of the ore feeding pipe; the top of the ore feeding pipe is open.
7. The low frequency ac electromagnetic elutriation machine of claim 1, wherein the water supply means comprises: the water jacket is annularly arranged at the upper end of the outer wall of the concentrate cone, and a plurality of jet pipes communicated with the inner cavity of the water jacket are arranged at the upper end of the inner wall of the concentrate cone;
the water outlet direction of the jet pipe is tangentially arranged and is consistent with the ore outlet direction of the ore feeding device; the jet pipe is provided with one layer, or two layers or more than two layers are arranged up and down, and each layer comprises a plurality of jet pipes; the jet pipe positions of adjacent layers are staggered.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910198699.XA CN109746117B (en) | 2019-03-15 | 2019-03-15 | Low-frequency ac electromagnetic elutriation machine |
| AU2019436089A AU2019436089B2 (en) | 2019-03-15 | 2019-04-25 | Low-frequency alternating-current electromagnetic elutriating machine |
| PCT/CN2019/084166 WO2020186596A1 (en) | 2019-03-15 | 2019-04-25 | Low-frequency alternating-current electromagnetic elutriating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910198699.XA CN109746117B (en) | 2019-03-15 | 2019-03-15 | Low-frequency ac electromagnetic elutriation machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109746117A CN109746117A (en) | 2019-05-14 |
| CN109746117B true CN109746117B (en) | 2023-10-10 |
Family
ID=66408774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910198699.XA Active CN109746117B (en) | 2019-03-15 | 2019-03-15 | Low-frequency ac electromagnetic elutriation machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109746117B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091301A (en) * | 1995-06-07 | 1997-01-07 | J Mulcahy Enterp A Division Of Inverpower Controls Ltd | Method and equipment of agitation control in continuous casting of metal |
| CN103240180A (en) * | 2013-05-07 | 2013-08-14 | 杨明忠 | Intelligent iron ore concentrator |
| CN104772211A (en) * | 2015-04-30 | 2015-07-15 | 山东华特磁电科技股份有限公司 | Electromagnetic elutriation fine separation machine |
| AU2015100935A4 (en) * | 2015-07-15 | 2015-08-27 | Austech Supplies Pty Ltd | Water-saving electromagnetic panning mineral separating system |
| CN105289842A (en) * | 2015-11-26 | 2016-02-03 | 辽宁科技大学 | Large column type magnetic separator of internal magnetic system |
| CN205518185U (en) * | 2016-03-28 | 2016-08-31 | 山东华特磁电科技股份有限公司 | Preparator is eluriated to split formula electromagnetism |
| CN206334753U (en) * | 2016-12-23 | 2017-07-18 | 山东科技大学 | Ferromagnetic mineral gradation retracting device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020157992A1 (en) * | 1996-09-03 | 2002-10-31 | Mcgaa John R. | Alternating current magnetic separator |
| CN1261225C (en) * | 2002-12-05 | 2006-06-28 | 广州有色金属研究院 | Vertable pulse vibration magnetic field magnetic separator |
| DE102011004958A1 (en) * | 2011-03-02 | 2012-09-06 | Siemens Aktiengesellschaft | Separator for separating magnetic or magnetizable particles contained in a suspension |
| CN209663493U (en) * | 2019-03-15 | 2019-11-22 | 山东华特磁电科技股份有限公司 | Low-frequency ac electromagnetism wash mill |
-
2019
- 2019-03-15 CN CN201910198699.XA patent/CN109746117B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091301A (en) * | 1995-06-07 | 1997-01-07 | J Mulcahy Enterp A Division Of Inverpower Controls Ltd | Method and equipment of agitation control in continuous casting of metal |
| CN103240180A (en) * | 2013-05-07 | 2013-08-14 | 杨明忠 | Intelligent iron ore concentrator |
| CN104772211A (en) * | 2015-04-30 | 2015-07-15 | 山东华特磁电科技股份有限公司 | Electromagnetic elutriation fine separation machine |
| AU2015100935A4 (en) * | 2015-07-15 | 2015-08-27 | Austech Supplies Pty Ltd | Water-saving electromagnetic panning mineral separating system |
| CN105289842A (en) * | 2015-11-26 | 2016-02-03 | 辽宁科技大学 | Large column type magnetic separator of internal magnetic system |
| CN205518185U (en) * | 2016-03-28 | 2016-08-31 | 山东华特磁电科技股份有限公司 | Preparator is eluriated to split formula electromagnetism |
| CN206334753U (en) * | 2016-12-23 | 2017-07-18 | 山东科技大学 | Ferromagnetic mineral gradation retracting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109746117A (en) | 2019-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019436089B2 (en) | Low-frequency alternating-current electromagnetic elutriating machine | |
| CN105921271A (en) | Intelligent elutriation magnetic separator and magnetic separation method | |
| US9333511B2 (en) | Apparatus and method for drilling fluid density separator using magnets | |
| CN103056028B (en) | Magnetic ore separation equipment and method | |
| AU588660B2 (en) | Magnetic separators | |
| CN109201354A (en) | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted | |
| CN109794353B (en) | Three-product radial magnetic field magnetic cyclone for magnetite separation and classification | |
| CN203155359U (en) | Multipolar-inversion magnetic separator | |
| US3966590A (en) | Magnetic ore separator | |
| CN201073617Y (en) | Permanent magnetism rotational flow dewatering channel | |
| CN109746117B (en) | Low-frequency ac electromagnetic elutriation machine | |
| CN109794352A (en) | A kind of three product axial magnetic field magnetic force cyclones for magnetic iron ore sorting classifying | |
| CN204320465U (en) | A kind of centrifugal separation device | |
| CN207342909U (en) | A kind of hydraulic classiciation pre-selection/picking equipment | |
| CN209663493U (en) | Low-frequency ac electromagnetism wash mill | |
| CN209156147U (en) | The MAGNETIC HYDROCYCLONES selected for weak magnetic mineral and magnetic reconnection close separation system | |
| CN209663491U (en) | Electromagnetism wash mill water supply device | |
| CN207430511U (en) | Composite force field spiral chute | |
| SU1143467A1 (en) | Magnetic separator | |
| CN2928248Y (en) | Magnetic oriented flow guide ore washing and ore dressing machine | |
| US4316542A (en) | Electromagnetic separator | |
| CN215235028U (en) | Electromagnetic gravity separator | |
| CN2135398Y (en) | Rotating flow magnetic force dewatering tank | |
| CN217341794U (en) | Uniform pressure stabilizing feeding device of magnetic separator | |
| CN209663492U (en) | Electromagnetism wash mill concentration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |