CN108745640B - Gradient magnetic gravity centrifugal screening chute, equipment and method for magnetic minerals - Google Patents
Gradient magnetic gravity centrifugal screening chute, equipment and method for magnetic minerals Download PDFInfo
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- CN108745640B CN108745640B CN201810613266.1A CN201810613266A CN108745640B CN 108745640 B CN108745640 B CN 108745640B CN 201810613266 A CN201810613266 A CN 201810613266A CN 108745640 B CN108745640 B CN 108745640B
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- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 136
- 239000011707 mineral Substances 0.000 title claims abstract description 136
- 238000012216 screening Methods 0.000 title claims abstract description 119
- 230000005484 gravity Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000009471 action Effects 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 11
- 239000011362 coarse particle Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/626—Helical separators
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- Manufacture And Refinement Of Metals (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention belongs to the technical field of magnetic mineral separation. A gradient magnetic gravity centrifugal screening chute, equipment and a method for magnetic minerals comprise a screening magnetic system and a spiral chute, wherein the screening magnetic system comprises a plurality of groups of magnetic units which are arranged along the surface of a cylinder in a homopolar manner; the spiral chute is coaxially arranged at the outer side of the screening magnetic system, and in the radial direction of the spiral chute, the magnetic field intensity of the screening magnetic system acting on the spiral chute diverges and weakens from inside to outside to form a radial magnetic field gradient; taking the intersection line of the spiral chute groove surface and the coaxial cylindrical surface alpha as a space spiral line beta, wherein the magnetic field intensity of each point on at least one lead H is the same in the space spiral line beta. The invention ensures that the screening efficiency of the magnetic minerals is higher, and the screening quality of the magnetic minerals is effectively ensured, thereby not only avoiding the inclusion of non-magnetic minerals with coarse particle sizes in the magnetic minerals, but also avoiding the loss of fine-particle-grade magnetic minerals, and further improving the screening quality and yield.
Description
Technical Field
The invention belongs to the technical field of magnetic mineral separation, and particularly relates to a gradient magnetic gravity centrifugal screening chute, equipment and a method for magnetic minerals.
Background
In the process that ore pulp flows along the groove surface of a spiral chute of conventional gravity separation equipment, heavy minerals move along the inner side of the groove surface under the action of centrifugal force and gravity, and light minerals move along the outer side of the groove surface, but for magnetic mineral separation, coarse-particle low-grade intergrowth minerals are more easily moved along the inner side of the groove surface due to the fact that the gravity influence of coarse particle size is greater than the action of the centrifugal force in the process of sliding down along the groove surface, and finally are mixed with the magnetic minerals to enter concentrate products so as to reduce the grade index of the concentrate; and for the fine-fraction magnetic minerals, the fine-fraction magnetic minerals are finer, so that the fine-fraction magnetic minerals can move along the outer side of the trough surface more easily, and finally are mixed with fine-fraction mineral mud on the outer side of the trough surface to enter the tailing product, so that the loss of the magnetic minerals is caused, and the recovery rate of the magnetic minerals of the concentrate product is reduced.
Fig. 1 is a schematic structural view of a conventional spiral chute apparatus, and fig. 2 is a schematic plan view of a conventional spiral chute. In the conventional spiral chute gravity separation process, heavy minerals gradually accelerate to settle along the inner side of the chute surface under the action of gravity, light minerals gradually move to the outer side of the chute surface along with water flow under the action of centrifugal force in the process of settling movement along with water flow to the lower part of the chute, and finally mineral strips are formed on the chute surface, namely heavy mineral strips close to the inner side of the chute surface, light mineral strips close to the outer side of the chute surface and intermediate mineral strips in the middle are formed, as shown in fig. 3.
For magnetite separation, the viscous resistance between the coarse-grained non-magnetic minerals and the fluid is far smaller than the gravity, so that the movement of the coarse-grained non-magnetic minerals gradually tends to be along the inner side of the chute groove surface and finally is mixed in the magnetic product to enter the concentrate product, thereby reducing the quality of the concentrate; the magnetic mineral of fine particles tends to move along with water flow to the outer side of the chute groove surface due to the fact that the viscous resistance of fluid is greater than the influence of gravity of the magnetic mineral, and finally the magnetic mineral and the non-magnetic mineral mud are mixed with each other and enter a tailing product, so that the loss of the magnetic mineral is caused; part of coarse-grained intergrowth minerals are mixed in the concentrate product, part of non-magnetic substances are mixed in the intermediate mineral belt, and a separation schematic diagram of the whole magnetic mineral chute gravity separation minerals is shown in fig. 4.
Based on the problems that the fine fraction magnetic minerals are mixed into the non-magnetic mineral slurry and the coarse fraction non-magnetic matters are mixed into the concentrate in the magnetic mineral screening process, the application performs targeted magnetic system design and further innovation of equipment structure, and the separation efficiency and quality of the magnetic minerals are improved.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides a gradient magnetic gravity centrifugal screening chute, equipment and a method for magnetic minerals, which are reasonable in magnetic system layout, and further designed for structure, so that the magnetic minerals are efficiently separated, and the screening quality of the magnetic minerals is improved.
In order to achieve the above purpose, the technical scheme adopted is as follows:
a gradient magnetogravity centrifugal screening chute for magnetic minerals, comprising: screening a magnetic system, wherein the magnetic system comprises a plurality of groups of magnetic units which are arranged along the surface of a cylinder in a homopolar manner; the spiral chute is coaxially arranged at the outer side of the screening magnetic system, and in the radial direction of the spiral chute, the magnetic field intensity of the screening magnetic system acting on the spiral chute is weakened from inside to outside in a divergent manner, so that a radial magnetic field gradient is formed; taking the intersection line of the spiral chute groove surface and the coaxial cylindrical surface alpha as a space spiral line beta, wherein the magnetic field intensity of each point on at least one lead H is the same in the space spiral line beta.
The device also comprises a parallel screening groove; the parallel screening grooves are correspondingly arranged at the lower part of the spiral chute, and the width of the groove surface of each parallel screening groove is smaller than that of the spiral chute; and sieve holes are formed in the groove surfaces of the spiral chute corresponding to the parallel screening grooves.
In the radial direction of the spiral chute, the outer end of the chute surface of the spiral chute is higher than the inner end of the chute surface.
The included angle between the magnetic force lines of the screening magnetic system and the groove surface of the spiral chute is 0-30 degrees.
The screening magnetic system further comprises a cylindrical matrix; the magnetic units are uniformly distributed on the cylindrical matrix; or the magnetic units are spirally arranged on the cylindrical substrate and correspond to the spiral chute.
The magnetic unit is a permanent magnet or an electromagnet.
A gradient magnetic gravity centrifugal screening device for magnetic minerals, comprising: a frame; the gradient magnetic gravity centrifugal screening chute of the magnetic mineral is arranged on the frame; the ore feeding groove is arranged at the top of the frame and corresponds to the top end of the spiral chute; and a plurality of ore discharge hoppers arranged at the lower part of the frame, wherein each ore discharge hopper corresponds to a corresponding position of the groove surface of the spiral chute.
The upper part of the frame is provided with a spiral diversion trench, and the spiral diversion trench comprises a primary section and a carefully selected section; the lower part of the spiral chute positioned in the fine selection section is provided with a parallel screening groove; the width of the groove surface of the parallel screening groove is smaller than that of the spiral chute, and the groove surface of the spiral chute corresponding to the parallel screening groove is provided with a sieve pore.
The gradient magnetic gravity centrifugal screening method for the magnetic minerals is a screening method for the magnetic minerals by utilizing the gradient magnetic gravity centrifugal screening equipment for the magnetic minerals, and specifically comprises the following steps:
a. according to the class of the screened magnetic minerals, adjusting the magnetic field intensity of the screened magnetic system in a segmented manner or adjusting the magnetic field intensity of the screened magnetic system as a whole;
b. feeding ore pulp through a mineral feeding groove, gradually forming a magnetic linkage body by magnetic minerals under the action of a screening magnetic system, and moving to the inner side of a spiral chute under the action of a radial magnetic field gradient; the fine fraction non-magnetic minerals move to the outer side of the spiral chute under the centrifugal action to realize layering;
c. the sorting and collecting of the minerals of different grades are carried out through the ore discharge hopper.
In the step b, through arranging parallel screening grooves and screening holes in the lower half section of the spiral chute, coarse-grain-diameter nonmagnetic minerals and weak-magnetism lean continuous biological minerals penetrate through the screening holes, and the concentration of the magnetic minerals is realized.
By adopting the technical scheme, the beneficial effects are that:
the magnetic mineral screening device is reasonable in overall structural design, and the magnetic mineral screening efficiency is higher by means of the arrangement of the screening magnetic system and the improvement of the structure of the spiral chute, and the screening quality of the magnetic mineral is effectively guaranteed, so that the non-magnetic mineral with coarse particle size is prevented from being mixed in the magnetic mineral, the loss of the fine-particle-level magnetic mineral is prevented, and the screening quality and the screening yield are improved.
The design of the screening magnetic system of this application, it can form radial magnetic field gradient on spiral chute, has ensured the quick reunion of magnetic mineral and has formed the toper magnetic linkage body to inward movement makes the mineral area on the spiral chute divide more clear and highly efficient, in addition, the screening magnetic system of this application, its magnetic field strength can realize regional adjustment, also can realize the uniformity adjustment of whole magnetic field strength, can realize the further exploration of screening technology.
The structural design of the spiral chute of the utility model provides a, it is through setting up parallel screening groove for the screening of the non-magnetic mineral of coarse grain footpath that original can't solve and the screening of the even living mineral of weak magnetism can solve, its and the synergism of screening magnetic system, thereby ensured multiple promotion of mineral screening quality, efficiency and output.
Drawings
Fig. 1 is a schematic structural view of a conventional spiral chute apparatus.
Fig. 2 is a schematic diagram of a trough surface of a conventional spiral trough.
Fig. 3 is a schematic diagram of a conventional spiral chute mineral sort flow regime.
Fig. 4 is a schematic diagram of a conventional spiral chute sorted mineral distribution.
FIG. 5 is a schematic diagram showing the distribution of magnetic fields of the screening magnet system according to the present invention.
Fig. 6 is a schematic diagram showing the motion state of the magnetic mineral under the action of a magnetic field.
FIG. 7 is a schematic diagram showing the structure of the magnetic system units in the spiral distribution in the screening magnetic system of the present invention.
Fig. 8 is a schematic diagram of the structure of a spatial spiral β coaxial with the screening magnet.
FIG. 9 is a schematic diagram showing the distribution of the sorted minerals in the spiral chute under the action of the magnetic field in the present invention.
Fig. 10 is a schematic diagram of the structure of a spiral chute and a parallel screening trough.
Fig. 11 is a schematic view of the distribution structure of the sorted minerals in the tank of fig. 10.
FIG. 12 is a schematic diagram of the structure of a gradient magnetic gravity centrifugal screening apparatus for magnetic minerals according to the present invention.
Number in the figure: 100 is a frame, 200 is a spiral chute, 201 is a spiral diversion trench, 202 is a primary section, 203 is a fine section, 300 is a ore feeding tank, 400 is a ore discharge hopper, 500 is a screening magnetic system, 501 is a cylindrical substrate, 502 is a magnetic unit, 503 is a parallel screening tank, 504 is a sieve mesh, 601 is a heavy mineral belt, 602 is an intermediate mineral belt, 603 is a light mineral belt, 604 is a magnet mineral, 605 is a gangue mineral, and 606 is a intergrowth mineral.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings.
Referring to fig. 5-12, the gradient magnetic gravity centrifugal screening chute for magnetic minerals comprises a screening magnetic system 500 and a spiral chute 200, wherein the screening magnetic system 500 comprises a plurality of groups of magnetic units 502 which are arranged along the cylindrical surface in the same polarity, and the magnetic units 502 are electromagnets or permanent magnets; the spiral chute 200 is coaxially arranged at the outer side of the screening magnetic system, and in the radial direction of the spiral chute 200, the magnetic field intensity of the screening magnetic system 500 acting on the spiral chute 200 diverges and weakens from inside to outside to form a radial magnetic field gradient; and taking the intersection line of the spiral chute groove surface and the coaxial cylindrical surface alpha as a space spiral line beta, wherein the magnetic field intensity of each point on at least one lead H is the same in the space spiral line beta.
The following description of several arrangements of the screening magnet system is made in this embodiment with respect to the screening magnet system, and the first form of the screening magnet system is: the permanent magnets are uniformly distributed along a cylindrical matrix in a homopolar manner, so that the axial line of the cylindrical matrix is taken as the center, the magnetic field intensity of any point on the cylindrical surface of the coaxial line of the cylindrical matrix in space is the same, the magnetic field gradually diverges outwards and attenuates along the radial direction of the cylindrical matrix, namely, the magnetic field intensity on the same cylindrical surface in space is the same, the magnetic field gradient is zero, and the magnetic field intensities on different cylindrical surfaces are gradually enhanced along with the reduction of the radial diameter of the cylindrical surface, so that the radial magnetic field gradient is formed.
The second form is: because the effective space of the screening magnetic system is based on minerals carried by the spiral chute, the corresponding magnetic field of the screening magnetic system can be formed only in the area corresponding to the spiral chute, namely, the permanent magnets can be uniformly distributed on the surface of the cylindrical matrix, the permanent magnets on the cylindrical matrix can be distributed along the spiral, and the spiral chute corresponds to the cylindrical matrix.
The third form is: the groove surfaces of the spiral chute are not necessarily horizontally arranged in the radial direction, so that certain inadaptability exists in the first form of 'same magnetic field intensity on the same cylindrical surface', and the magnetic field direction of the screening magnetic system is optimally selected in parallel with the groove surfaces; when the included angle between the magnetic field direction and the groove surface is within 30 degrees, the separation efficiency and the separation effect can be improved compared with the prior art; that is, the intersection line of the spiral chute groove surface and the coaxial cylindrical surface alpha is taken as a space spiral line beta, the magnetic system is screened to act on the magnetic field in the spiral chute, the magnetic field intensity of any point in the space spiral line beta is the same, or the space spiral line beta is arranged in a segmented mode, the magnetic field intensity of each point on at least one lead H is the same, and the screening process is adjusted and optimized through the arrangement of the magnetic systems with the same polarity but different magnetic field intensities in different sections.
With the structural design of the screening magnetic system, the magnetic force lines gradually diverge from the inner side to the outer side of the chute in the direction parallel to the chute groove surface, namely, the magnetic field is attenuated in a certain gradient in the direction parallel to the chute groove surface, the magnetic field intensity near the inner side of the chute groove surface is weak, and the magnetic field intensity near the outer side of the chute is weak, as shown in fig. 5 and 6. Therefore, under the action of the gradient magnetic field, the magnetic minerals (including the interlinked minerals) gradually move to the inner side of the chute groove surface under the action of the magnetic force; the device can realize agglomeration of fine fraction magnetic minerals and form a conical flux linkage body and move towards the inner side of the groove surface, so that the loss of the fine fraction magnetic minerals mixed into slurry is avoided.
However, as shown in fig. 9, L is the width of the chute surface, L2 is the width of the magnetic mineral distributing belt L1, which is the width of heavy mineral distribution, and in the range of the magnetic material distributing belt, there is still some non-magnetic material inclusion, and in the range of the heavy mineral belt, a large amount of intergrowth mineral is distributed, which directly reduces the quality of the magnetic material concentrate.
Therefore, by arranging the parallel screening grooves 503, the parallel screening grooves 503 are correspondingly arranged at the lower part of the spiral chute 200, and the width of the groove surface of the parallel screening grooves 503 is smaller than that of the spiral chute; the spiral chute groove surface corresponding to the parallel screening groove is provided with a sieve mesh 504, and the two sides of the parallel screening groove are connected with the bottom of the spiral chute groove to form a sealed screening space.
In the screening process, the magnetic mineral forms a magnetic aggregate on the screen surface of the spiral chute, the size of the magnetic aggregate is far larger than the size of the screen hole, so that the magnetic aggregate can not be formed by the non-magnetic matters continuously rolling down along the screen surface, and the screen is continuously penetrated in the process of sliding down along the screen, so that the inclusion of the non-magnetic matters in the magnetic product is greatly reduced, and the quality of the magnetic product is improved.
In order to avoid the phenomenon that the magnetic minerals are influenced by centrifugal force to move to the outer side of the spiral chute, the division of mineral strips is not clear, and the groove surface of the spiral chute is obliquely arranged, namely, the outer end of the groove surface of the spiral chute is higher than the inner end of the groove surface in the radial direction of the spiral chute. At this time, the included angle between the magnetic force lines of the screening magnetic system corresponding to the spiral chute and the groove surface of the spiral chute is 0-30 degrees.
The application also discloses a magnetic mineral gradient magnetic gravity centrifugal screening device, which comprises a frame 100, a magnetic mineral gradient magnetic gravity centrifugal screening chute, a feeding trough 300 and a plurality of ore discharge hoppers 400 arranged at the lower part of the frame in the embodiment, wherein the magnetic mineral gradient magnetic gravity centrifugal screening chute is arranged on the frame, and the feeding trough is arranged at the top of the frame and corresponds to the top end of the spiral chute; each ore discharge hopper corresponds to the corresponding position of the groove surface of the spiral chute.
According to the actual screening situation, the spiral chute is designed in a sectional mode, the spiral diversion trench is arranged at the upper part of the frame and can be a part of the spiral chute, but the middle part of the spiral chute is not provided with a magnetic field, and the spiral diversion trench can be independently arranged; the spiral chute is divided into a primary section and a fine section, the lower part of the spiral chute of the primary section is not provided with a parallel screening groove, and the spiral chute is only used for realizing agglomeration and inward movement of fine fraction magnetic minerals, and the lower part of the spiral chute positioned in the fine section is provided with a parallel screening groove; the width of the groove surface of the parallel screening groove is smaller than that of the spiral chute, and the groove surface of the spiral chute corresponding to the parallel screening groove is provided with a sieve pore, so that the screening of nonmagnetic minerals and conjoined minerals on the inner side of the spiral chute is realized, and the quality of the screened magnetic minerals is improved.
After ore pulp is fed from a feeding groove at the top of the equipment, in the screening process of the spiral diversion groove, the ore pulp is preliminarily layered and zoned under the action of a composite force field such as gravity, centrifugal force, viscous resistance, inclined plane pressure and the like; when ore pulp passes through the primary section, fine fraction magnetic minerals moving to the outer edge of the chute along with water flow gradually move to the inner edge of the chute surface under the action of a magnetic field, and an agglomerated flux linkage body is formed; in the process of ore pulp passing through the fine selection section, under the action of the composite fields such as a magnetic field, a screening field, a flow field and the like, fine-particle non-magnetic minerals are continuously thrown to the outer edge of the spiral chute, and coarse-particle non-magnetic minerals and weak-magnetic lean continuous biological minerals are continuously screened through, so that the quality of magnetic products is continuously improved.
The embodiment also discloses a gradient magnetic gravity centrifugal screening method of the magnetic mineral, which is a screening method of the magnetic mineral by utilizing the gradient magnetic gravity centrifugal screening equipment of the magnetic mineral, and specifically comprises the following steps:
a. according to the class of the screened magnetic minerals, adjusting the magnetic field intensity of the screened magnetic system in a segmented manner or adjusting the magnetic field intensity of the screened magnetic system as a whole;
b. feeding ore pulp through a mineral feeding groove, gradually forming a magnetic linkage body by magnetic minerals under the action of a screening magnetic system, and moving to the inner side of a spiral chute under the action of a radial magnetic field gradient; the fine fraction non-magnetic minerals move to the outer side of the spiral chute under the centrifugal action to realize layering;
c. the sorting and collecting of the minerals of different grades are carried out through the ore discharge hopper.
In the step b, through arranging parallel screening grooves and screening holes in the lower half section of the spiral chute, coarse-grain-diameter nonmagnetic minerals and weak-magnetism lean continuous biological minerals penetrate through the screening holes, and the concentration of the magnetic minerals is realized.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A gradient magnetic gravity centrifugal screening chute for magnetic minerals, comprising:
screening a magnetic system, wherein the magnetic system comprises a plurality of groups of magnetic units which are arranged along the surface of a cylinder in a homopolar manner;
the spiral chute is coaxially arranged at the outer side of the screening magnetic system, and in the radial direction of the spiral chute, the magnetic field intensity of the screening magnetic system acting on the spiral chute is weakened from inside to outside in a divergent manner, so that a radial magnetic field gradient is formed;
taking the intersection line of the spiral chute groove surface and the coaxial cylindrical surface alpha as a space spiral line beta, wherein the magnetic field intensity of each point on at least one lead H is the same in the space spiral line beta;
the device also comprises a parallel screening groove;
the parallel screening grooves are correspondingly arranged at the lower part of the spiral chute, and the width of the groove surface of each parallel screening groove is smaller than that of the spiral chute;
the inner side groove surface of the spiral chute corresponding to the parallel screening groove is provided with a sieve pore;
in the radial direction of the spiral chute, the outer end of the chute surface of the spiral chute is higher than the inner end of the chute surface;
the included angle between the magnetic force lines of the screening magnetic system and the groove surface of the spiral chute is 0-30 degrees.
2. The gradient magnetogravity centrifugal screen chute of magnetic minerals of claim 1, wherein the screen magnet system further comprises a cylindrical matrix;
the magnetic units are uniformly distributed on the cylindrical matrix;
or the magnetic units are spirally arranged on the cylindrical substrate and correspond to the spiral chute.
3. The gradient magnetic gravity centrifugal screening chute of magnetic minerals according to claim 1, wherein the magnetic unit is a permanent magnet or an electromagnet.
4. A gradient magnetic gravity centrifugal screening device for magnetic minerals, comprising:
a frame;
a gradient magnetogravity centrifugal screen chute for magnetic minerals according to any one of claims 1 to 3, which is provided on said frame;
the ore feeding groove is arranged at the top of the frame and corresponds to the top end of the spiral chute;
and a plurality of ore discharge hoppers arranged at the lower part of the frame, wherein each ore discharge hopper corresponds to a corresponding position of the groove surface of the spiral chute.
5. The gradient magnetic gravity centrifugal screening device for magnetic minerals according to claim 4, wherein a spiral diversion trench is arranged at the upper part of the frame, and the spiral diversion trench comprises a primary section and a fine section;
the lower part of the spiral chute positioned in the fine selection section is provided with a parallel screening groove;
the width of the groove surface of the parallel screening groove is smaller than that of the spiral chute, and the groove surface of the spiral chute corresponding to the parallel screening groove is provided with a sieve pore.
6. A method for magnetic mineral gradient magnetic gravity centrifugal screening, characterized in that the method for magnetic mineral screening by using the magnetic mineral gradient magnetic gravity centrifugal screening device according to claim 4 or 5 specifically comprises the following steps:
a. according to the class of the screened magnetic minerals, adjusting the magnetic field intensity of the screened magnetic system in a segmented manner or adjusting the magnetic field intensity of the screened magnetic system as a whole;
b. feeding ore pulp through a mineral feeding groove, gradually forming a magnetic linkage body by magnetic minerals under the action of a screening magnetic system, and moving to the inner side of a spiral chute under the action of a radial magnetic field gradient; the fine fraction non-magnetic minerals move to the outer side of the spiral chute under the centrifugal action to realize layering;
c. the sorting and collecting of the minerals of different grades are carried out through the ore discharge hopper.
7. The gradient magnetic gravity centrifugal screening method of magnetic minerals according to claim 6, wherein in the step b, by arranging parallel screening grooves and screening holes in the lower half section of the spiral chute, coarse-grain non-magnetic minerals and weak-magnetic lean-continuous biological minerals penetrate through the screening holes, and the concentration of the magnetic minerals is realized.
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| CN201810613266.1A CN108745640B (en) | 2018-06-14 | 2018-06-14 | Gradient magnetic gravity centrifugal screening chute, equipment and method for magnetic minerals |
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| CN201810613266.1A CN108745640B (en) | 2018-06-14 | 2018-06-14 | Gradient magnetic gravity centrifugal screening chute, equipment and method for magnetic minerals |
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| 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 |
| CN110302890B (en) * | 2019-07-03 | 2023-08-22 | 中国恩菲工程技术有限公司 | Chute sorting machine and method based on image acquisition, storage medium and electronic equipment |
| CN110871138A (en) * | 2019-12-11 | 2020-03-10 | 成都市宏智达科技有限公司 | A choice device for fine grain weak magnetism magnetic mineral |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299744A (en) * | 1992-08-21 | 1994-04-05 | Garmater Robert A | Granulating, separating and classifying rubber tire materials |
| JPH07155639A (en) * | 1993-12-10 | 1995-06-20 | Kobe Steel Ltd | Method and device for magnetic concentration |
| EP0729789A1 (en) * | 1995-02-28 | 1996-09-04 | IFE Industrie-Einrichtungen Fertigungs-Aktiengesellschaft | Magnetic separator |
| RU2138337C1 (en) * | 1995-11-21 | 1999-09-27 | Ковалев Александр Александрович | Vibrating concentrator |
| KR20030037724A (en) * | 2001-11-05 | 2003-05-16 | 주식회사 포스코 | A rotary-type circular screen apparatus |
| KR20030052174A (en) * | 2001-12-20 | 2003-06-26 | 주식회사 포스코 | Apparatus for removing a piece of steel from the load in the belt conveyor |
| KR20040017057A (en) * | 2002-08-20 | 2004-02-26 | 대평산업 주식회사 | sludge exclusion apparatus for reclamed sands manufacturing system |
| JP2005324170A (en) * | 2004-05-17 | 2005-11-24 | Kissei Pharmaceut Co Ltd | Vibrating screen apparatus and method for operating the same |
| DE102006013627A1 (en) * | 2006-03-22 | 2007-10-04 | Bernhard Brameier | Screening device for screening of sand or water mixture, has feeding device comprising multiple feeding slides arranged one above other for feeding mixture on different positions of screen |
| CN102228866A (en) * | 2011-04-18 | 2011-11-02 | 昆明理工大学 | Compound classification method and equipment for ground ore product |
| CN104394993A (en) * | 2013-02-01 | 2015-03-04 | 河北联合大学 | method for pre-treating ilmenite tailings after iron-beneficiation |
| CN104923381A (en) * | 2015-06-30 | 2015-09-23 | 辽宁科技大学 | Complex force field spiral chute for ore dressing |
| CN205087543U (en) * | 2015-11-02 | 2016-03-16 | 安徽理工大学 | Take high position of spiral chute to cut coal chute device |
| CN205462691U (en) * | 2016-01-28 | 2016-08-17 | 清远市金盛锆钛资源有限公司 | Ore dressing is with compound field of force spiral chute |
| CN205701001U (en) * | 2016-06-08 | 2016-11-23 | 安徽开发矿业有限公司 | A kind of spiral chute uniformly divides ore deposit every slag mine-feeding equipment |
| CN107051897A (en) * | 2017-04-21 | 2017-08-18 | 王现明 | A kind of color sorting dust removal device |
| CN107199115A (en) * | 2017-07-04 | 2017-09-26 | 鞍钢集团矿业有限公司 | A kind of Treatment of Middling technique |
| CN207308084U (en) * | 2017-10-30 | 2018-05-04 | 江西石城县永盛选矿设备制造有限公司 | A kind of efficient separation spiral chute |
| CN207430503U (en) * | 2017-10-30 | 2018-06-01 | 江西石城县永盛选矿设备制造有限公司 | A kind of fine ore dressing spiral chute |
| CN208098370U (en) * | 2018-06-14 | 2018-11-16 | 中国地质科学院郑州矿产综合利用研究所 | Gradient magnetic gravity centrifugal screening chute and equipment for magnetic minerals |
-
2018
- 2018-06-14 CN CN201810613266.1A patent/CN108745640B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299744A (en) * | 1992-08-21 | 1994-04-05 | Garmater Robert A | Granulating, separating and classifying rubber tire materials |
| JPH07155639A (en) * | 1993-12-10 | 1995-06-20 | Kobe Steel Ltd | Method and device for magnetic concentration |
| EP0729789A1 (en) * | 1995-02-28 | 1996-09-04 | IFE Industrie-Einrichtungen Fertigungs-Aktiengesellschaft | Magnetic separator |
| RU2138337C1 (en) * | 1995-11-21 | 1999-09-27 | Ковалев Александр Александрович | Vibrating concentrator |
| KR20030037724A (en) * | 2001-11-05 | 2003-05-16 | 주식회사 포스코 | A rotary-type circular screen apparatus |
| KR20030052174A (en) * | 2001-12-20 | 2003-06-26 | 주식회사 포스코 | Apparatus for removing a piece of steel from the load in the belt conveyor |
| KR20040017057A (en) * | 2002-08-20 | 2004-02-26 | 대평산업 주식회사 | sludge exclusion apparatus for reclamed sands manufacturing system |
| JP2005324170A (en) * | 2004-05-17 | 2005-11-24 | Kissei Pharmaceut Co Ltd | Vibrating screen apparatus and method for operating the same |
| DE102006013627A1 (en) * | 2006-03-22 | 2007-10-04 | Bernhard Brameier | Screening device for screening of sand or water mixture, has feeding device comprising multiple feeding slides arranged one above other for feeding mixture on different positions of screen |
| CN102228866A (en) * | 2011-04-18 | 2011-11-02 | 昆明理工大学 | Compound classification method and equipment for ground ore product |
| CN104394993A (en) * | 2013-02-01 | 2015-03-04 | 河北联合大学 | method for pre-treating ilmenite tailings after iron-beneficiation |
| CN104923381A (en) * | 2015-06-30 | 2015-09-23 | 辽宁科技大学 | Complex force field spiral chute for ore dressing |
| CN205087543U (en) * | 2015-11-02 | 2016-03-16 | 安徽理工大学 | Take high position of spiral chute to cut coal chute device |
| CN205462691U (en) * | 2016-01-28 | 2016-08-17 | 清远市金盛锆钛资源有限公司 | Ore dressing is with compound field of force spiral chute |
| CN205701001U (en) * | 2016-06-08 | 2016-11-23 | 安徽开发矿业有限公司 | A kind of spiral chute uniformly divides ore deposit every slag mine-feeding equipment |
| CN107051897A (en) * | 2017-04-21 | 2017-08-18 | 王现明 | A kind of color sorting dust removal device |
| CN107199115A (en) * | 2017-07-04 | 2017-09-26 | 鞍钢集团矿业有限公司 | A kind of Treatment of Middling technique |
| CN207308084U (en) * | 2017-10-30 | 2018-05-04 | 江西石城县永盛选矿设备制造有限公司 | A kind of efficient separation spiral chute |
| CN207430503U (en) * | 2017-10-30 | 2018-06-01 | 江西石城县永盛选矿设备制造有限公司 | A kind of fine ore dressing spiral chute |
| CN208098370U (en) * | 2018-06-14 | 2018-11-16 | 中国地质科学院郑州矿产综合利用研究所 | Gradient magnetic gravity centrifugal screening chute and equipment for magnetic minerals |
Non-Patent Citations (1)
| Title |
|---|
| 沿沟矿选煤系统二次筛选改造;胡志鹏等;江西煤炭科技(第3期);第115-116页 * |
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