CN210230258U - Mineral sorting equipment based on composite magnetic field - Google Patents

Mineral sorting equipment based on composite magnetic field Download PDF

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Publication number
CN210230258U
CN210230258U CN201921024275.3U CN201921024275U CN210230258U CN 210230258 U CN210230258 U CN 210230258U CN 201921024275 U CN201921024275 U CN 201921024275U CN 210230258 U CN210230258 U CN 210230258U
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spiral chute
magnetic field
mineral separation
spiral
magnetic
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Chuanbing Yu
于传兵
Mingyang Sun
孙铭阳
Chuanlong Wang
王传龙
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China ENFI Engineering Corp
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China ENFI Engineering Corp
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Abstract

The utility model relates to a material sorting technology field provides a mineral separation equipment based on complex magnetic field, including spiral chute and magnetism system, the below of the part that at least part of magnetism system is located spiral chute, and the magnetism system acts on the magnetic field intensity of spiral chute and weakens gradually to the outside of spiral chute by the inboard of spiral chute. This open mineral separation equipment based on combined magnetic field is through being applied to the magnetic system in the spiral chute, when waiting to sort the material and remove the separation along the extending direction of spiral chute, the magnetic field force that the magnetic system produced acts on being located the material of waiting to sort in the spiral chute, when waiting to sort the material and pass through the magnetic field region that the magnetic system formed, magnetism or weak magnetism granule receive the inside magnetic force of totality for the distribution region of magnetism or weak magnetism granule is close to the inboard of spiral chute more, thereby strengthened magnetism or weak magnetism granule and the zonation distribution trend of gangue granule along the groove face of spiral chute, improved the rate of recovery of magnetism or weak magnetism fine grain in the concentrate.

Description

Mineral sorting equipment based on composite magnetic field
Technical Field
The utility model relates to a material sorting technology field especially relates to a mineral sorting facilities based on complex magnetic field.
Background
The spiral chute is a kind of flowing film sorting equipment, and is commonly used in ore dressing plant to sort fine metal ore. The flow field of the cross section of the spiral chute has a circulating flow with an outward upper layer and an inward bottom layer, and the fine particles of the selected metal ore are mainly acted by gravity, buoyancy, centrifugal force, friction force, fluid resistance and equipment wall surface supporting force in the flow field in the equipment. Generally, the feeding particles are firstly longitudinally layered, in the process, coarse and heavy particles tend to be distributed in a lower layer, and light and fine particles are mainly distributed in an upper layer; in the process of doing spiral motion downwards along the groove surface, the friction force between the light fine particles and the groove surface is small, and the light fine particles are brought to the inner side of the cross section of the spiral chute by the fluid flowing inwards; the friction between the coarse and heavy particles and the groove surface is large and mainly distributed on the outer side, so that all the fed particles are gradually distributed in a belt manner in the process of flowing along the groove surface of the spiral chute.
Ideally, the order of zonal distribution of different feeding particles on the groove surface is (from inside to outside): high density fine, high density coarse, low density fine, low density coarse, the outermost being fine mud. However, in actual separation, the main problem of spiral chute separation is that high-density fine particles are easily mixed into middling and tailings, which results in the loss of fine-fraction concentrate, and low-density coarse particles are easily mixed into concentrate, which results in the larger overall particle size and the lower grade of the concentrate product.
SUMMERY OF THE UTILITY MODEL
One of the main objects of the present disclosure is to overcome the above-mentioned problem of poor separation effect of the spiral chute in the prior art, and to provide a mineral separation device based on a composite magnetic field.
The utility model provides a mineral sorting facilities based on combined magnetic field, include:
a spiral chute;
and at least part of the magnetic system is positioned below part of the spiral chute, and the magnetic field intensity of the magnetic system acting on the spiral chute is gradually weakened from the inner side of the spiral chute to the outer side of the spiral chute.
In one embodiment of the invention, the direction of extension of at least part of the magnetic system coincides with the direction of extension of the inner side of the spiral chute to the outer side of the spiral chute.
In one embodiment of the present invention, the inner surface of the spiral chute comprises a bottom surface of the spiral chute, and a spiral chute inner side surface and a spiral chute outer side surface connected to both ends of the bottom surface of the spiral chute;
the projection of the part of the inner side surface of the spiral chute on the magnetic system positioned below the spiral chute is positioned in the magnetic system.
In one embodiment of the invention, the projection of the part of the outer side of the spiral chute on the magnetic system located below it is located inside the magnetic system.
In an embodiment of the present invention, the magnetic system is an electromagnet, and the electromagnet includes:
an iron core;
the coil is wound on the iron core and used for receiving current;
the width of one end of the iron core, which is close to the inner side of the spiral chute, is smaller than the width of the other end of the iron core, which is close to the outer side of the spiral chute, so that the magnetic field intensity of the electromagnet acting on the spiral chute is gradually weakened from the inner side of the spiral chute to the outer side of the spiral chute.
In one embodiment of the present invention, the width of the core is gradually expanded from one end near the inner side of the spiral chute to the other end near the outer side of the spiral chute.
In an embodiment of the present invention, the iron core includes:
a main body section located below a portion of the spiral chute, the coil being wound on the main body section;
the first bending section is connected with one end of the main body section and is positioned on the inner side of the spiral chute.
In an embodiment of the present invention, the first bending section is a first L-shaped section body, and a first U-shaped cavity is provided between the first bending section and the main body section;
wherein, the tip of first bending segment sets up with spiral chute is relative.
In an embodiment of the present invention, the iron core further includes:
the second bending section is connected with the other end of the main body section, which is far away from the first bending section, and the second bending section is positioned on the outer side of the spiral chute;
the width of one end of the main body section connected with the first bending section is smaller than that of the other end of the main body section connected with the second bending section.
In an embodiment of the present invention, the first bending section and the second bending section are disposed opposite to each other, the second bending section is a second L-shaped section, and a second U-shaped cavity is disposed between the second bending section and the main body section;
wherein, the tip of second bending segment sets up with spiral chute is relative.
In an embodiment of the present invention, a predetermined included angle is formed between the magnetic force line of the magnetic system and the groove surface of the spiral chute, the predetermined included angle is an acute angle, and the magnetic force line is inclined upward relative to the groove surface of the spiral chute.
In an embodiment of the utility model, the magnetism is a plurality of, and mineral separation equipment based on compound magnetic field still includes:
the spiral chute is arranged around the supporting rod;
wherein, a plurality of magnetic systems are arranged on the supporting rod at intervals.
In an embodiment of the present invention, the mineral separation apparatus based on the composite magnetic field further includes:
the stopping part is arranged in the spiral chute and is used for being in contact with the materials to be sorted moving along the spiral chute.
In an embodiment of the present invention, the inner surface of the spiral chute includes a spiral chute bottom surface and a spiral chute inner side surface and a spiral chute outer side surface connected to both ends of the spiral chute bottom surface, and the stopper portion is a bar-shaped rod connected to the spiral chute inner side surface and the spiral chute outer side surface.
In an embodiment of the present invention, the stopping portion is plural, and the plural stopping portions are disposed along an extending direction of the spiral chute.
In an embodiment of the present invention, the mineral separation apparatus based on the composite magnetic field further includes:
and the flushing pipe is arranged on the spiral chute and used for feeding the materials to be sorted on the spiral chute into water flow.
In an embodiment of the present invention, the inner surface of the spiral chute includes a spiral chute bottom surface and a spiral chute inner side surface and a spiral chute outer side surface connected to both ends of the spiral chute bottom surface, the water outlet of the flushing pipe is located on the spiral chute inner side surface, and the central line of the water outlet is inclined downward to be disposed at the spiral chute bottom surface.
In an embodiment of the present invention, the number of the flushing pipes is plural, and the plural flushing pipes are disposed along the extending direction of the spiral chute.
The utility model discloses a mineral sorting equipment based on complex magnetic field is through being applied to the spiral chute with magnetism system in, when waiting to sort the material and remove the sorting along the extending direction of spiral chute promptly, magnetism system produces magnetic field force act on the material of waiting to sort that is located the spiral chute, and magnetism system acts on the magnetic field intensity of spiral chute weakens gradually by the inboard outside to the spiral chute of spiral chute, promptly when waiting to sort the material when the magnetic field region that forms is through magnetism system, magnetism or weak magnetism granule receive the inside magnetic force of totality, make magnetism or weak magnetism granule's distribution region be close to the inboard of spiral chute more, thereby magnetism or weak magnetism granule and the branch area distribution trend of gangue granule along the cell face of spiral chute have been strengthened, the rate of recovery of magnetism or weak magnetism fine grain in the concentrate has been improved.
Drawings
Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic diagram of a composite magnetic field based mineral separation plant according to an exemplary embodiment;
FIG. 2 is a schematic diagram of a magnetic system configuration of a complex magnetic field based mineral separation plant according to an exemplary first embodiment;
fig. 3 is a schematic diagram of a magnetic system configuration of a composite magnetic field based mineral separation plant according to an exemplary second embodiment.
The reference numerals are explained below:
10. a spiral chute; 11. the bottom surface of the spiral chute; 12. the inner side surface of the spiral chute; 13. the outer side surface of the spiral chute; 14. a feed inlet; 15. a discharge port; 20. a magnetic system; 21. an iron core; 211. a main body section; 212. a first bending section; 213. a second bending section; 22. a coil; 30. a support; 31. a support frame; 32. a support bar; 40. a stopper portion; 50. a flush pipe; 60. an image acquisition unit; 61. a material cutter; 611. a material pipe; 62. a light supplement lamp; 70. a control system; 71. a control end; 72. an excitation current controller; 80. a feeding system; 81. a feed pump; 82. a frequency converter; 83. a feeding assembly; 84. a feeder; 85. a feeding pipe; 86. a flow meter; 90. a feed tank.
Detailed Description
Exemplary embodiments that embody features and advantages of the present disclosure are described in detail below in the specification. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration various exemplary structures in which aspects of the disclosure may be practiced. Other specific arrangements of systems and steps, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over", "between", "within", and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the drawings. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure.
An embodiment of the present invention provides a mineral separation device based on a composite magnetic field, please refer to fig. 1 to 3, the mineral separation device based on the composite magnetic field includes: a spiral chute 10; and the magnetic system 20, at least part of the magnetic system 20 is positioned below part of the spiral chute 10, and the magnetic field intensity of the magnetic system 20 acting on the spiral chute 10 is gradually weakened from the inner side of the spiral chute 10 to the outer side of the spiral chute 10.
The mineral separation apparatus based on the complex magnetic field according to one embodiment of the present invention applies the magnetic system 20 to the inside of the spiral chute 10, that is, when the material to be sorted moves along the extending direction of the spiral chute 10 for sorting, the magnetic force generated by the magnetic system 20 acts on the material to be sorted in the spiral chute 10, and the magnetic field intensity of the magnetic system 20 acting on the spiral chute 10 gradually weakens from the inner side of the spiral chute 10 to the outer side of the spiral chute 10, i.e. when the material to be sorted passes through the region of the magnetic field formed by the magnetic system 20, the magnetic or weakly magnetic particles are subjected to a generally inward magnetic force, so that the distribution region of the magnetic or weakly magnetic particles is closer to the inner side of the spiral chute 10, thereby strengthening the zonal distribution trend of the magnetic or weak magnetic particles and the gangue particles along the groove surface of the spiral chute 10, improving the recovery rate of the magnetic or weak magnetic fine particles in the concentrate, and solving the problem of poor sorting effect of the spiral chute in the prior art.
In one embodiment, the portion of the spiral chute 10 represents a partial trough section of the spiral chute 10, i.e., considering that the spiral chute 10 extends in a generally spiral manner, a magnetic system 20 may be located below a section of the spiral chute 10, i.e., it may be understood that the magnetic system 20 is located between two ends of the spiral chute 10.
In one embodiment, the spiral chute 10 includes a feed inlet 14 for feeding and a discharge outlet 15 for discharging, i.e., a magnetic system 20 is located between the feed inlet 14 and the discharge outlet 15 that forms a magnetic field region between the feed inlet 14 and the discharge outlet 15.
Regarding the positional relationship between the spiral chute 10 and the magnetic system 20, the extending direction of at least a part of the magnetic system 20 coincides with the extending direction of the inner side of the spiral chute 10 to the outer side of the spiral chute 10. The magnetic system 20 is located across the width direction of the spiral chute 10, that is, the extending direction is consistent with the width direction of the spiral chute 10, the inner side of the spiral chute 10 and the outer side of the spiral chute 10 are mainly relative to the surrounding central position of the spiral chute 10, the inner side of the spiral chute 10 is close to the surrounding central position of the spiral chute 10, and the outer side of the spiral chute 10 is far away from the surrounding central position of the spiral chute 10.
Regarding the surface composition of the spiral chute 10, as shown in fig. 2 and 3, the inner surface of the spiral chute 10 includes a spiral chute bottom surface 11, and a spiral chute inner side surface 12 and a spiral chute outer side surface 13 connected to both ends of the spiral chute bottom surface 11; the projection of the part of the inner side surface 12 of the spiral chute on the magnetic system 20 positioned below the inner side surface is positioned in the magnetic system 20.
In one embodiment, the trough surface of the spiral trough 10, i.e. the inner surface of the spiral trough 10, is composed of a spiral trough bottom surface 11 and a spiral trough inner side surface 12 and a spiral trough outer side surface 13 connected to both ends of the spiral trough bottom surface 11, wherein the spiral trough inner side surface 12 is the side surface close to the inner side of the spiral trough 10, and the spiral trough outer side surface 13 is the side surface close to the outer side of the spiral trough 10. In order to ensure that the spiral chute inner side surface 12 is located in the magnetic field region, therefore, the projection of the portion of the spiral chute inner side surface 12 on the magnetic system 20 located therebelow is located inside the magnetic system 20, that is, the extending direction of one end of the magnetic system 20 crosses the spiral chute inner side surface 12, which can be interpreted as that one end of the magnetic system 20 is closer to the central position surrounded by the spiral chute 10 than the spiral chute inner side surface 12 is to the central position surrounded by the spiral chute 10.
In one embodiment, since the magnetic system 20 is only arranged opposite to a part of the spiral chute 10, the projection of the part of the spiral chute inner side surface 12 on the magnetic system 20 located therebelow is located inside the magnetic system 20. If viewed from the overall structure, the position of one magnetic system 20 may be located below a certain section of the spiral chute 10, relative to another section may be above, and only the bottom surface of the spiral chute 10 acting between the magnetic systems 20 is considered here.
Optionally, the projection of the part of the spiral chute outer side surface 13 on the magnetic system 20 located therebelow is located inside the magnetic system 20. Along a certain linear direction, when two ends of the magnetic system 20 are respectively positioned at the outer sides of the inner side surface 12 and the outer side surface 13 of the spiral chute, a certain section of the chute surface of the spiral chute 10 is positioned in a magnetic field area formed by the magnetic system 20, so that magnetic or weakly magnetic particles are subjected to overall inward magnetic force, and the distribution area of the magnetic or weakly magnetic particles is closer to the inner side of the spiral chute 10.
As shown in fig. 2 and 3, the magnetic system 20 is an electromagnet, and the electromagnet includes: an iron core 21; a coil 22, the coil 22 being wound on the core 21 for receiving current; the width of one end of the iron core 21 close to the inner side of the spiral chute 10 is smaller than the width of the other end of the iron core 21 close to the outer side of the spiral chute 10, so that the magnetic field intensity of the electromagnet acting on the spiral chute 10 is gradually weakened from the inner side of the spiral chute 10 to the outer side of the spiral chute 10.
In one embodiment, the magnetic system 20 is an electromagnet, that is, the magnetic force generated by the magnetic system 20 is controlled by an external current, in order to gradually weaken the magnetic field intensity of the electromagnet on the spiral chute 10 from the inner side of the spiral chute 10 to the outer side of the spiral chute 10, so that the width of one end of the iron core 21 close to the inner side of the spiral chute 10 is smaller than the width of the other end of the iron core 21 close to the outer side of the spiral chute 10, and the magnetic field density of one end of the iron core 21 close to the inner side of the spiral chute 10 is relatively large, so that the magnetic or weakly magnetic particles are subjected to a generally inward magnetic force.
In one embodiment, the width of the core 21 gradually expands from one end near the inside of the spiral chute 10 to the other end near the outside of the spiral chute 10. The projection of the core 21 on the horizontal plane forms a plane resembling a sector, i.e. the width of the two end faces is not uniform.
As for a specific structural form of the iron core 21, as shown in fig. 1 and 2, the iron core 21 includes: a main body section 211, the main body section 211 being located below a portion of the spiral chute 10, the coil 22 being wound on the main body section 211; a first bending section 212, the first bending section 212 is connected to one end of the main body section 211, and the first bending section 212 is located inside the spiral chute 10.
In one embodiment, the iron core 21 is composed of a main body section 211 and a first bending section 212, the main body section 211 is used for winding the coil 22 and is located below a portion of the spiral chute 10, and the first bending section 212 is located inside the spiral chute 10, i.e. is located opposite to the side of the spiral chute 10, when one side of the iron core 21 is bent in one direction.
In one embodiment, the first bending section 212 is a first L-shaped section body, and a first U-shaped cavity is formed between the first bending section 212 and the main body section 211; wherein the end of the first bending section 212 is arranged opposite to the spiral chute 10.
Further, as shown in fig. 2, the core 21 further includes: a second bending section 213, the second bending section 213 is connected to the other end of the main body section 211 far away from the first bending section 212, and the second bending section 213 is located outside the spiral chute 10; the width of the end of the main body segment 211 connected to the first bending segment 212 is smaller than the width of the other end of the main body segment 211 connected to the second bending segment 213.
In one embodiment, the core 21 is composed of a first bending section 212, a main body section 211 and a second bending section 213, and the first bending section 212 and the second bending section 213 are respectively located at two ends of the main body section 211.
In one embodiment, the first bending section 212 is disposed opposite to the second bending section 213, the second bending section 213 is a second L-shaped section, and a second U-shaped cavity is disposed between the second bending section 213 and the main body section 211; wherein the end of the second bending section 213 is arranged opposite the spiral chute 10.
In the first embodiment of the core 21, as shown in fig. 2, the top view of the core 21 is a sector, both the left and right ends of the core 21 are bent upward, the left end is narrow, the right end is wide, the magnetic induction lines are directed from the left end to the right end (or the right end is directed to the left end, depending on the coil winding direction), and the magnetic induction line density near the groove surface of the spiral chute 10 near the left end is greater than the magnetic induction line density near the groove surface of the spiral chute 10 near the right end. In the process that the magnetic particles flow downwards along the groove surface of the spiral chute, the magnetic particles are subjected to the action of a leftward magnetic field force, so that the magnetic particles tend to be distributed on the inner side of the spiral chute 10 more easily, and are separated from the nonmagnetic particles.
For the second embodiment of the iron core 21, as shown in fig. 3, only the left end of the iron core 21 is bent upward, and the top view is also in a sector shape, the left end of the cross section of the iron core is small, and the right end is large, which generates magnetic induction lines and affects the movement of magnetic particles similarly to the electromagnet shown in fig. 2.
The force applied to the magnetic particles in the magnetic field can be calculated according to the following formula:
fm=μ0VKHgradH
μ0vacuum magnetic permeability, H/m; v is the particle volume, m3(ii) a K is the particle susceptibility; h is the background magnetic field intensity of the particles, A/m; grad H is the spatial magnetic field gradient.
In one embodiment, the magnetic force lines of the magnetic system 20 and the groove surface of the spiral chute 10 form a predetermined included angle, the predetermined included angle is an acute angle, and the magnetic force lines are inclined upward relative to the groove surface of the spiral chute 10. The magnetic system 20 forms an upward magnetic field force relative to the groove surface of the spiral chute 10, that is, the magnetic system can provide an upward force for the material to be sorted, so that the friction force between the material to be sorted and the groove surface of the spiral chute 10 can be reduced, the sorting effect is improved to a certain extent, and the range of the preset included angle can be selected to be 0-25 degrees.
In one embodiment, the magnetic system 20 is plural, and the mineral sorting apparatus based on the composite magnetic field further comprises: the spiral chute 10 comprises a bracket 30, wherein the bracket 30 comprises a support frame 31 and a support rod 32 arranged in the middle of the support frame 31, and the spiral chute 10 is arranged around the support rod 32; wherein, a plurality of magnetic systems 20 are arranged on the support bar 32 at intervals. By arranging a plurality of magnetic systems 20 at intervals on the support bar 32, i.e. a plurality of magnetic systems 20 can generate magnetic field regions at different positions, the whole sorting process can be optimized.
In one embodiment, the position of the support rod 32 can be understood as the central position of the spiral chute 10, and the magnetic system 20 is disposed on the support rod 32, and the magnetic field lines generated by the magnetic system 20 can be regarded as a circular radial line in a certain space.
In one embodiment, the composite magnetic field based mineral sorting apparatus further comprises: a stop 40, the stop 40 being disposed inside the spiral chute 10 for contact with material to be sorted moving along the spiral chute 10. When the material to be sorted runs against the stopping part 40 along the groove surface of the spiral chute 10, magnetic aggregates formed by the action of the magnetic field in the material to be sorted are loosened under the action of turbulent eddies formed by the stopping part 40 and falling from the surface of the stopping part 40 to the groove surface, gangue particles contained in the material to be sorted are released and move along the groove surface again, so that zonal distribution is realized, and the pollution of gangue impurities in the magnetic aggregates to concentrate is reduced.
In one embodiment, the inner surface of the spiral chute 10 comprises a spiral chute bottom surface 11 and a spiral chute inner side surface 12 and a spiral chute outer side surface 13 connected to both ends of the spiral chute bottom surface 11, and the stopper 40 is a bar-shaped rod connected to the spiral chute inner side surface 12 and the spiral chute outer side surface 13. The stop 40 is located on the spiral chute bottom 11 and is connected to both the spiral chute inner side 12 and the spiral chute outer side 13, i.e. it divides the chute surface of the spiral chute 10, but it does not affect the normal movement of the material to be sorted.
In one embodiment, the bar may be an angular bar, i.e. enclosed by three surfaces, the first surface contacting the material to be sorted being the upstream surface, one of which is attached to the bottom 11 of the spiral chute, the opposite side of the upstream surface being at an angle of (0, 90) to the bottom 11 of the spiral chute, the other side being perpendicular to the bottom 11 of the spiral chute.
Optionally, the stopper 40 is multiple, and the multiple stoppers 40 are arranged along the extending direction of the spiral chute 10. Two stops 40 may be arranged adjacent to each other, and may form a 3-degree angle with the spiral chute 10.
In one embodiment, as shown in fig. 1, the composite magnetic field based mineral sorting apparatus further comprises: and the flushing pipe 50 is arranged on the spiral chute 10 and used for feeding the material to be sorted on the spiral chute 10 into water flow. The arrangement of the flushing pipe 50 can flush the fine mud moving to the inner side of the spiral chute 10 during the sorting process to the outer side, so as to reduce the content of the fine mud in the concentrate.
Optionally, the inner surface of the spiral chute 10 comprises a spiral chute bottom surface 11, and a spiral chute inner side surface 12 and a spiral chute outer side surface 13 connected to both ends of the spiral chute bottom surface 11, the water outlet of the flushing pipe 50 is located on the spiral chute inner side surface 12, and the center line of the water outlet is arranged to be inclined downward to the spiral chute bottom surface 11.
Optionally, the flush pipe 50 is plural, and the plural flush pipes 50 are arranged along the extending direction of the spiral chute 10.
In one embodiment, the intensity of the magnetic field applied to the spiral chute 10 by the magnetic system 20 is adjustable, and the mineral sorting device based on the composite magnetic field further comprises an image acquisition part 60, wherein the image acquisition part 60 is used for acquiring the distribution image information of the material belt of the discharge hole 15.
In an embodiment, the distribution of the materials to be sorted when reaching the discharge port 15 can be determined by acquiring the material belt distribution image information of the discharge port 15 through the image acquisition portion 60, so that the distribution can be analyzed, and then the sorting effect can be determined according to the sorting result, and the magnetic field intensity of the magnetic system 20 acting on the spiral chute 10 directly affects the sorting effect, so that the magnetic field intensity of the magnetic system 20 acting on the spiral chute 10 can be correspondingly adjusted according to the material belt distribution image information, thereby ensuring that the sorting effect reaches the optimal state, and reasonably utilizing the magnetic field intensity, and avoiding wasting electric power. The utility model discloses a mineral sorting equipment based on combined magnetic field can improve separation quality through setting up of magnetism system 20, and the setting of image acquisition portion 60 can also be adjusted the magnetic field intensity size of magnetism system 20.
For the specific selection of magnetic system 20, magnetic system 20 is the electro-magnet, and the electro-magnet includes iron core 21 and winding coil 22 on iron core 21, and mineral separation equipment based on compound magnetic field still includes: and the control system 70, the control system 70 is connected with both the image acquisition part 60 and the coil 22 to receive the tape distribution image information acquired by the image acquisition part 60 and adjust the current input into the coil 22 according to the tape distribution image information.
In one embodiment, by connecting the control system 70 to both the image acquisition part 60 and the coil 22, the control system 70 has the function of receiving the image information of the distribution of the analyzed tapes, and can also adjust the current input to the coil 22 according to the specific analysis result.
With respect to the specific composition of the control system 70, as shown in fig. 1, the control system 70 includes: the control end 71, the control end 71 is connected with the image acquisition part 60 to receive and analyze the material belt distribution image information; an excitation current controller 72, wherein the control end 71 is connected with the excitation current controller 72, and the excitation current controller 72 is connected with the coil 22; the control end 71 analyzes the tape distribution image information to send an action signal, and the excitation current controller 72 receives the action signal and adjusts the current magnitude of the input coil 22 according to the action signal.
In one embodiment, the control system 70 is composed of a control terminal 71 and an excitation current controller 72, the control system 70 is configured to receive and analyze the tape distribution image information, and then transmit the analyzed result to the excitation current controller 72, and the excitation current controller 72 can adjust the current input to the coil 22 according to the analyzed result. If the separation portion is complete, the current may be increased, and the separation effect may be preferably decreased, so as to reduce the amount of electricity used.
In view of the practical application of the composite magnetic field based mineral separation device, as shown in fig. 1, the composite magnetic field based mineral separation device further includes a feeding system 80, and the feeding system 80 includes: a feeding pump 81, wherein the feeding pump 81 is used for being communicated with the feeding pool 90; a frequency converter 82, wherein the frequency converter 82 is connected with the feeding pump 81; one end of the feeding component 83 is communicated with the feeding pump 81, and the other end of the feeding component 83 is communicated with the feeding hole 14, so that the feeding pump 81 feeds the materials to be sorted in the feeding pool 90 into the spiral chute 10 through the feeding component 83; wherein the control system 70 is connected to a frequency converter 82.
In one embodiment, the feeding rate of the feeding system 80 also affects the sorting effect, and the feeding rate of the feeding system 80 is adjusted accordingly according to the direction result obtained by the strip distribution image information by connecting the control system 70 with the frequency converter 82 of the feeding system 80.
In one embodiment, the frequency converter 82 directly controls the efficiency of the feed pump 81 drawing material to be sorted from the feed basin 90 and the amount of material fed to the spiral chute 10, so that it is necessary to adjust the frequency converter 82 via the control system 70 to achieve an adjustable control of the feed rate.
With respect to the specific structure of the feeding assembly 83, as shown in fig. 1, the feeding assembly 83 includes: a feeder 84, the feeding end of the feeder 84 being located above the feed port 14; a feeding pipe 85, wherein one end of the feeding pipe 85 is communicated with the feeding pump 81, and the other end of the feeding pipe 85 is communicated with the feeder 84; wherein, a flow meter 86 is arranged on the feeding pipe 85, and the flow meter 86 is connected with the control system 70 to transmit flow information to the control system 70.
In one embodiment, the feed assembly 83 is comprised of a feeder 84 and a feed tube 85, the feed tube 85 being used to feed the material to be sorted from the feed pump 81 to the feeder 84 and then through the feeder 84 to the spiral chute 10.
In one embodiment, the flow meter 86 is coupled to the control system 70 primarily to allow the controller to obtain the feed rate in real time and then adjust the magnetic field strength and feed rate after the image information is distributed across the strip to ensure optimal sorting.
In one embodiment, the composite magnetic field based mineral sorting apparatus further comprises: the material interceptor 61 is connected with the discharge port 15, the material interceptor 61 is provided with a plurality of material pipes 611, and the plurality of material pipes 611 and the discharge port 15 can be arranged in a switching manner; the light supplement lamp 62, at least part of the light supplement lamp 62 is located above the discharging hole 15, so as to provide a light source for the discharging hole 15. The material cutter 61 is mainly used for feeding the sorted different material strips to a specific receiving position, and the light supplement lamp 62 mainly ensures that the image acquisition part 60 has enough light sources when acquiring images.
In one embodiment, the number of the material pipes 611 is 3, the concentrate pipe, the middling pipe and the tailing pipe are sequentially arranged along the inner side of the spiral chute 10 to the outer side of the spiral chute 10, after the distribution of the separated strips along the groove surface is completed, the material to be separated is discharged from the discharge hole 15 at the tail end of the spiral chute 10, and different ore strips are respectively discharged from the concentrate pipe, the middling pipe and the tailing pipe 4 by adjusting the ore separating valve in the material cutter 61.
In one embodiment, the image capturing unit 60 can be a camera, the control terminal 71 is a control PC, the solid line in fig. 1 is a material line, the dotted line is a monitoring signal line, and the feeding pump 81 is a feeding screw pump.
To the utility model discloses a mineral separation equipment's based on composite magnetic field a concrete embodiment, as shown in fig. 1 to 3:
the utility model discloses a mineral sorting facilities based on compound magnetic field is a fine grain metal mine sorting facilities based on compound force field, this equipment has realized the gravity field, the sorting of fine grain mineral under centrifugal force field and the magnetic field, high density fine grain rate of recovery has been improved, through introducing check (backstop portion 40) design at the tank face, greatly reduced mixing with of gangue granule in the magnetic grouping body, the concentrate taste has been improved, add multistage moisturizing pipe (wash pipe 50) through the chute medial surface, the pollution of fine mud to the concentrate has been reduced, the desliming effect has been improved. In addition, the sorting equipment is also provided with a set of control system, and the system can intelligently control the feeding speed, the current of the electromagnetic coil and other operation parameters according to the distribution condition of the groove surface ore belt based on the image analysis technology of machine vision.
In this embodiment, the control system includes: an electromagnet, a fill light 62, a camera (image acquisition part 60), a feed flow meter (flow meter 86), a feed screw pump frequency converter (frequency converter 82), a control PC (control end 71) and an excitation current controller 72.
In this embodiment, the excitation current controller 72 can respectively control the excitation currents in different electromagnets, and the control range of the excitation current is 0A-20A; the cross section of the lattice bar is provided with three edges, one edge is attached to the groove surface, the included angle range between the corresponding edge of the incident flow surface and the groove surface is (0, 90), and the other edge is vertical to the groove surface; the water flushing pipe has several sections, each of which can be designed into different values according to the requirement, and the water flushing pipe is attached to the inner side of the spiral chute, and the water outlet angle is downward.
In this embodiment, the interceptor (interceptor 61) has a dividing valve therein, and the dividing valve can control the interception positions of the concentrate, middling and tailings on the trough surface.
In this embodiment, the sorting process of the sorting apparatus is as follows: the material to be sorted enters a feeder 84 through a feeding pipe 85, and the feeder 84 feeds the material to be sorted to the groove surface of the spiral chute. The feeding material moves along the groove surface and is longitudinally layered at first, in the process, coarse and heavy particles tend to be distributed on the lower layer, and light and fine particles are mainly distributed on the upper layer; in the process of continuously doing downward spiral motion along the groove surface, the friction force between the light fine particles and the groove surface is small, and the light fine particles are brought to the inner side of the cross section of the spiral chute by the fluid flowing inwards; the friction between the coarse and heavy particles and the groove surface is large and mainly distributed on the outer side. When the magnetic field area formed by the electromagnet is passed, the magnetic or weak magnetic particles are subjected to the overall inward magnetic force, so that the distribution area of the magnetic or weak magnetic particles is closer to the inner side of the spiral chute, the zonal distribution tendency of the magnetic or weak magnetic particles and gangue particles along the chute surface is strengthened, and the recovery rate of the magnetic or weak magnetic fine particles in the concentrate is improved; when the material meets the lattice bars in the process of moving along the groove surface of the spiral chute, magnetic agglomerates formed by the action of a magnetic field in the material are loosened under the action of turbulence vortexes formed by the lattice bars and falling from the surface of the lattice bars to the groove surface, gangue particles mixed with the magnetic agglomerates are released and move along the groove surface again, and the zonal distribution is realized, so that the pollution of gangue impurities in the magnetic agglomerates to concentrate is reduced.
The inner side of the spiral chute is provided with a flushing pipe, so that fine mud moving to the inner side of the spiral chute in the sorting process can be flushed to the outer side, and the content of the fine mud in the concentrate is reduced; after the zonal distribution is finished along the groove surface, the materials are discharged from the tail end of the spiral chute, and different ore zones are respectively discharged from the concentrate pipe, the middling pipe and the tailing pipe by adjusting the ore separating valve inside the ore cutter.
During normal separation, the distribution positions of the concentrate, the middlings and the tailings on the groove surface are in a reasonable range, the reasonable range is used as a set value for controlling the ore belt on the groove surface, and if the distribution positions deviate from the range, relevant operation parameters are adjusted; in the sorting process, the camera transmits the ore belt distribution picture of the chute surface to the control PC in real time, the control PC performs quantitative analysis on the transmitted ore belt distribution image to obtain the accurate positions of the chute surfaces of the concentrate, the middlings and the tailings, the accurate positions are compared with the set range of ore belt distribution, and if the ore belt position is within the set range, the control PC does not send a control signal; otherwise, the control PC sends an action signal to the frequency converter of the feeding screw pump and the exciting current controller 72 to adjust the feeding speed and the magnetic field intensity, thereby changing the distribution condition of the ore belt on the groove surface.
In the embodiment, the excitation current controller 72 is adjusted so that the excitation currents entering the four electromagnetic coils in fig. 1 are respectively 5A, 3A and 5A, when the fed material passes through the magnetic field area formed by the electromagnets, the magnetic or weakly magnetic particles are subjected to the overall inward magnetic force, so that the distribution area of the magnetic or weakly magnetic particles is closer to the inner side of the spiral chute, thereby strengthening the zonal distribution tendency of the magnetic or weakly magnetic particles and gangue particles along the chute surface, and improving the recovery rate of the magnetic or weakly magnetic fine particles in the concentrate. The height of the middle lattice bar is 10mm, when the material meets the lattice bar in the moving process of the groove surface of the spiral chute, magnetic clusters formed in the lattice bar material under the action of a magnetic field are loosened under the action of turbulence vortexes formed by the lattice bar and falling from the surface of the lattice bar to the groove surface, and gangue particles mixed in the magnetic clusters are released and move along the groove surface again to realize zonal distribution.
In this embodiment, the washing pipe has been arranged to spiral chute inboard, can wash the outside with the inboard fine mud that moves the spiral chute among the sorting process, reduces fine mud content in the concentrate, and the washing pipe water yield is 0.5m3H; after the belt distribution along the groove surface is finished, the material is discharged from the tail end of the spiral chute.
In this embodiment, a plurality of groups of electromagnetic coils (magnetic system 20) are arranged along the spiral direction of the spiral chute 10, an iron core 21 of the electromagnetic coils is C-shaped, the iron core 21 crosses the bottom and the side of the spiral chute, two ends of the iron core 21 respectively correspond to the inner side and the outer side of the spiral chute, the iron core is fan-shaped when viewed from a top view, one end close to the inner side of the spiral chute is obviously narrower than one end close to the outer side of the spiral chute, so that a magnetic field formed near the groove surface of the spiral chute has the characteristic of large gradient of the magnetic field close to the inner side of the spiral chute, and the.
In this embodiment, the solenoid may be arranged such that the magnetic field lines formed by the solenoid are not parallel to the spiral chute surface, but are at an angle.
In this embodiment, the inclined plane of the lattice bars is the incident surface, the lattice bars are arranged on the groove surface at a certain distance behind the electromagnetic coil, and the number and the spacing can be designed as required.
The mineral separation equipment based on the composite magnetic field provides the electromagnet for the magnetic field, the size of the exciting current and the number of the opening coils can be conveniently adjusted, and automatic or intelligent control is conveniently realized; the grid strips are arranged on the groove surface, the grid strips are arranged on the groove surface at a certain distance behind the electromagnetic coil, the number and the spacing can be designed according to the needs, and the design of the grid strips enables magnetic clusters generated by a magnetic field to be loosened, so that the inclusion of the magnetic clusters on gangue particles is eliminated, and the taste of the concentrate is improved; the intelligent control system based on machine vision is provided, and automatic regulation and control of the feeding speed, the magnetic field intensity and the arrangement position (realized by determining which electromagnetic coil or coils are electrified) are realized. The multistage flushing pipe is arranged along the inner side of the spiral chute, the flushing pipe is attached to the inner side of the spiral chute, and the flushing port is inclined downwards, so that the pollution of fine mud to concentrate can be reduced.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (18)

1. A mineral separation apparatus based on a composite magnetic field, comprising:
a spiral chute (10);
a magnetic system (20), at least part of the magnetic system (20) is positioned below part of the spiral chute (10), and the magnetic field intensity of the magnetic system (20) acting on the spiral chute (10) is gradually weakened from the inner side of the spiral chute (10) to the outer side of the spiral chute (10).
2. A mineral separation plant based on a composite magnetic field according to claim 1, characterized in that the extension direction of at least part of the magnetic system (20) coincides with the extension direction of the inside of the spiral chute (10) to the outside of the spiral chute (10).
3. The composite magnetic field based mineral separation plant according to claim 2, characterized in that the inner surface of the spiral chute (10) comprises a spiral chute bottom (11) and a spiral chute inner side (12) and a spiral chute outer side (13) connected to both ends of the spiral chute bottom (11);
wherein the projection of the part of the inner side surface (12) of the spiral chute on the magnetic system (20) positioned below the part is positioned in the magnetic system (20).
4. A mineral separation plant based on a composite magnetic field according to claim 3, characterized in that the projection of the part of the spiral chute outer side (13) onto the magnetic system (20) located therebelow is located inside the magnetic system (20).
5. The composite magnetic field based mineral separation apparatus of claim 2, wherein the magnetic system (20) is an electromagnet comprising:
an iron core (21);
a coil (22), the coil (22) being wound around the core (21) for receiving an electric current;
the width of one end, close to the inner side of the spiral chute (10), of the iron core (21) is smaller than the width of the other end, close to the outer side of the spiral chute (10), of the iron core (21), so that the magnetic field intensity of the electromagnet acting on the spiral chute (10) is gradually weakened from the inner side of the spiral chute (10) to the outer side of the spiral chute (10).
6. The composite magnetic field based mineral separation apparatus according to claim 5, wherein the width of the iron core (21) is gradually expanded from one end near the inner side of the spiral chute (10) to the other end near the outer side of the spiral chute (10).
7. The composite magnetic field based mineral separation apparatus of claim 5, wherein the iron core (21) comprises:
a body segment (211), the body segment (211) being located below a portion of the spiral trough (10), the coil (22) being wound on the body segment (211);
a first bending section (212), wherein the first bending section (212) is connected with one end of the main body section (211), and the first bending section (212) is positioned at the inner side of the spiral chute (10).
8. The composite magnetic field based mineral separation apparatus of claim 7, wherein the first bend section (212) is a first L-shaped section body, and a first U-shaped cavity is formed between the first bend section (212) and the main body section (211);
wherein the end of the first bending section (212) is arranged opposite to the spiral chute (10).
9. The composite magnetic field based mineral separation apparatus of claim 7, wherein the iron core (21) further comprises:
a second bending section (213), wherein the second bending section (213) is connected with the other end of the main body section (211) far away from the first bending section (212), and the second bending section (213) is positioned at the outer side of the spiral chute (10);
wherein the width of one end of the main body segment (211) connected with the first bending segment (212) is smaller than the width of the other end of the main body segment (211) connected with the second bending segment (213).
10. The composite magnetic field based mineral separation apparatus of claim 9, wherein the first bending section (212) is opposite to the second bending section (213), the second bending section (213) is a second L-shaped section body, and a second U-shaped cavity is arranged between the second bending section (213) and the main body section (211);
wherein the end of the second bending section (213) is arranged opposite to the spiral chute (10).
11. The composite magnetic field based mineral separation apparatus according to any one of claims 1 to 10, wherein the magnetic lines of force of the magnetic system (20) and the groove surface of the spiral chute (10) have a predetermined included angle therebetween, the predetermined included angle is an acute angle, and the magnetic lines of force are inclined upward with respect to the groove surface of the spiral chute (10).
12. The composite magnetic field based mineral separation apparatus according to any one of claims 1 to 10, wherein the magnetic system (20) is plural, the composite magnetic field based mineral separation apparatus further comprising:
the spiral chute comprises a bracket (30), wherein the bracket (30) comprises a supporting frame (31) and a supporting rod (32) arranged in the middle of the supporting frame (31), and the spiral chute (10) is arranged around the supporting rod (32);
wherein a plurality of the magnetic systems (20) are arranged on the support rod (32) at intervals.
13. The composite magnetic field based mineral separation apparatus of any one of claims 1 to 10, further comprising:
a stop (40), the stop (40) being arranged inside the spiral chute (10) for contacting material to be sorted moving along the spiral chute (10).
14. The composite magnetic field based mineral separation apparatus according to claim 13, wherein the inner surface of the spiral chute (10) comprises a spiral chute bottom surface (11) and a spiral chute inner side surface (12) and a spiral chute outer side surface (13) connected to both ends of the spiral chute bottom surface (11), and the stopper portion (40) is a bar-shaped rod connected to the spiral chute inner side surface (12) and the spiral chute outer side surface (13).
15. The composite magnetic field based mineral separation apparatus of claim 13, wherein the stopper (40) is plural, and the plural stoppers (40) are provided along the extending direction of the spiral chute (10).
16. The composite magnetic field based mineral separation apparatus of any one of claims 1 to 10, further comprising:
the water flushing pipe (50) is arranged on the spiral chute (10) and used for feeding the materials to be sorted on the spiral chute (10) into water flow.
17. The composite magnetic field based mineral separation apparatus according to claim 16, wherein the inner surface of the spiral chute (10) includes a spiral chute bottom surface (11) and a spiral chute inner side surface (12) and a spiral chute outer side surface (13) connected to both ends of the spiral chute bottom surface (11), the water outlet of the flush pipe (50) is located on the spiral chute inner side surface (12), and the center line of the water outlet is disposed to be inclined downward to the spiral chute bottom surface (11).
18. The complex magnetic field-based mineral separation apparatus according to claim 16, wherein the flush pipe (50) is plural, and the plural flush pipes (50) are arranged along an extending direction of the spiral chute (10).
CN201921024275.3U 2019-07-03 2019-07-03 Mineral sorting equipment based on composite magnetic field Active CN210230258U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252506A (en) * 2019-07-03 2019-09-20 中国恩菲工程技术有限公司 Sorting mineral equipment based on resultant field

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110252506A (en) * 2019-07-03 2019-09-20 中国恩菲工程技术有限公司 Sorting mineral equipment based on resultant field
CN110252506B (en) * 2019-07-03 2024-01-26 中国恩菲工程技术有限公司 Mineral separation equipment based on composite magnetic field

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