NL2027476B1 - Multi-field composite fine particle grading device - Google Patents

Multi-field composite fine particle grading device Download PDF

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Publication number
NL2027476B1
NL2027476B1 NL2027476A NL2027476A NL2027476B1 NL 2027476 B1 NL2027476 B1 NL 2027476B1 NL 2027476 A NL2027476 A NL 2027476A NL 2027476 A NL2027476 A NL 2027476A NL 2027476 B1 NL2027476 B1 NL 2027476B1
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Prior art keywords
cylinder
electromagnetic
grading
classification
fine particle
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NL2027476A
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Dutch (nl)
Inventor
Zheng Gangfeng
Liu Haizeng
Wang Chuanzhen
Lu Wenbao
Shen Zhizhu
Wang Chao
Min Fanfei
Shen Liang
Zheng Yan
Qiu Yibing
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Univ Anhui Sci & Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/081—Shapes or dimensions
    • 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
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
    • B03B5/34—Applications of hydrocyclones
    • 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
    • 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
    • B03C7/00—Separating solids from solids by electrostatic effect
    • B03C7/02—Separators
    • B03C7/06—Separators with cylindrical material carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0335—Component parts; Auxiliary operations characterised by the magnetic circuit using coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/001—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with means for electrostatic separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/004—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal filters, in the cyclone chamber or in the vortex finder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/007—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with internal rotors, e.g. impeller, ventilator, fan, blower, pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • B04C2009/008—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with injection or suction of gas or liquid into the cyclone

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Fluid Mechanics (AREA)
  • Cyclones (AREA)

Abstract

The present invention discloses a multi—field composite fine particle grading device, including a feed flow guide cylinder, a swirling flow—sieving cylindrical sieve, an electromagnetic grading cylinder, a centrifugal grading conical—frustum, and a vortex 5 detection cylinder. An upper end surface of the electromagnetic grading cylinder is connected to the feed flow guide cylinder, a lower end surface thereof is connected to the centrifugal grading conical—frustum, and the swirling flow—sieving cylindrical sieve is disposed inside the electromagnetic grading cylinder. The vortex detection cylinder is inserted from a top portion of the feed flow guide cylinder and extends to the swirling 10 flow—sieving cylindrical sieve. The feed flow guide cylinder is provided with a tangential material feed port. The electromagnetic grading cylinder, a cyclone grading cone, and the vortex detection cylinder are respectively provided with a minus sieve fine particle product discharge port, an underflow coarse particle product discharge port, and an overflow fine particle product discharge port. According to the present invention, high— 15 efficient grading under the multi—field composite action of gravity, a centrifugal force, an electromagnetic force, and the like may be implemented, so that fine particle grading efficiency and a processing capability can be effectively improved, technical disadvantages of existing hydraulic grading devices can be overcome, and requirements of an operation of accurate grading of particles of 0 mm to 1 mm in a plurality of 20 industrial fields, such as mining, chemical industry, and environment, can be satisfied.

Description

MULTI-FIELD COMPOSITE FINE PARTICLE GRADING DEVICE
BACKGROUND Technical Field The present invention belongs to the field of grading device technologies, and in particular, to a multi-field composite fine particle grading device applicable to heterogeneous phase separation, solid-liquid multiphase separation, and grading. Related Art Currently, a grading hydrocyclone is a common device for grading of fine particles of from O mm to 1 mm, and mainly includes a tangential feed port, a cylinder, a cone, an underflow port, an overflow pipe, an overflow port, and the like. The tangential feed port is disposed at an upper portion of the cylinder section and enters the cylinder along a tangential direction. A top portion of the cylinder section is connected to the overflow port. A bottom portion of the cylinder section is connected to a big end of the cone. A small end of the cone 1s connected to the underflow port. The overflow pipe runs through and extends into the cylinder from a top portion of the cylinder. After being fed into the grading hydrocyclone along the tangential feed port at a specific pressure, the pulp rotates at a high speed and moves downward under the action of gravity in the cylinder. When the pulp reaches the cone, because the circulation area is gradually reduced, a part of the fluid keeps moving downward to pass through the cone section, and is discharged from the underflow port, to form an underflow product. However, a part of the fluid moves up after being squeezed to pass through the overflow pipe, and is discharged from the overflow port, to form an overflow product. At present, after years of unremitting development, the hydrocyclone has advantages such as a simple structure, a large processing capacity, and low operating costs, but still faces a practical problem that a grading effect needs to be improved in terms of grading accuracy. Moreover, particles in the hydrocyclone settle along a radial direction under the action of a centrifugal force, and the rotation radius of coarse particles is significantly larger than that of fine particles. However, due to the phenomenon of equal settling, some fine particles with high density enter the coarse particles, and on the contrary, some coarse particles with low density enter the fine particles, resulting in reduced grading efficiency. In addition, a short-circuit flow under a cover existing in the grading hydrocyclone makes a part of the material directly discharged from the overflow port without being separated, and a boundary layer flow carrying fine particles is discharged from the underflow port. For the problems existing in the hydrocyclone, the invention patent with the publication No. CN268493Y discloses a hydrocyclone with a filter sieve. A main feature of the invention is that a filter sieve is disposed between a feed pipe and an overflow pipe, and the diameter and the shape of the filter sieve are consistent with those of an axial zero-rate enveloping surface of the cyclone.
A lower portion of the sieve is uncovered, and an upper portion is connected to a top portion of a feed cavity.
Therefore, the problem of coarse particles in overflow is resolved to some extent, but the problem of fine particles in underflow is still not resolved.
The invention patent with the publication No.
CN101844115A discloses a three-product cyclone grading sieve.
A main feature of the invention is that a lower port of a flow guide cylinder of a cyclone cylinder is connected to a cylindrical sieve, the cylindrical sieve is sheathed inside the cyclone cylinder, a conical sieve is sheathed inside a cone, the cone is equipped with water replenishment, and a flow guide plate is disposed between a center pipe and a conical sieve.
A pressure difference of an outer swirling flow on a lower side wall of the strong centrifugal force field enables sieve-passing sieving of fine particles.
The problem of coarse particles in circulation near a side wall and a top cover of the cyclone is eliminated, but the "backflow" phenomenon and the relatively poor effect of grading in the cone section still exist in a sieve at a lower portion of the cylinder section, and the phenomenon of fine particles in underflow is still serious.
The Chinese patent with the application No. 201910159412.2 discloses a three-product radial magnetic-field magnetic cyclone for magnetite separation and grading.
A main feature of the invention is that a magnetic field is built in a bottom portion of a cylinder section, to separate a coarse particle intergrowth body from the magnetite.
The invention is mainly used for magnetite grading, and applicability to grading of other minerals is not mentioned.
The Chinese patent with the application No. 201910159334.6 discloses a three-product axial magnetic-field magnetic cyclone for magnetite separation and grading.
A main feature of the invention is that a magnetic field is built in a lower portion of a device, to separate a coarse particle intergrowth body from the magnetite.
The invention is mainly used for magnetite grading, and poor applicability to other minerals is not mentioned The present invention relates to a multi-field composite fine particle grading device.
The device integrates a gravity field, a centrifugal force field, and an electromagnetic field.
According to the present invention, efficient separation of fine particles under the combined action of cyclone grading, the sieving grading, and the electromagnetic grading is implemented, which helps to improve the grading efficiency, can overcome the technical disadvantage that a convention grading hydrocyclone has a poor grading effect, and 1s more suitable for promotion and application.
SUMMARY An objective of the present invention is to provide a multi-field composite fine particle grading device for disadvantages in the related art, where the precision of a grading hydrocyclone can be improved, requirements on fine particle grading precision in industrial production processes can be better satisfied, and the disadvantages in the related art can be overcome.
The technical problem to be resolved by the present invention is resolved by the following technical solutions.
A multi-field composite fine particle grading device is provided, including an electromagnetic grading cylinder; a feed flow guide cylinder disposed at an upper portion of the electromagnetic grading cylinder; a centrifugal grading conical-frustum disposed at a lower portion of the electromagnetic grading cylinder; a swirling flow-sieving cylindrical sieve disposed inside the electromagnetic grading cylinder; a vortex detection cylinder inserting from a top portion of the feed flow guide cylinder and extending to an electromagnetic grading cylinder region; a tangential material feed port entering the feed flow guide cylinder along a tangential direction; a minus sieve fine particle product discharge port provided on a side surface of the electromagnetic grading cylinder; an overflow fine particle product discharge port provided at a top portion of the vortex detection cylinder; and an underflow coarse particle product discharge port disposed at a bottom portion of the centrifugal grading conical-frustum, where the tangential material feed ports are symmetrically disposed on two sides of the feed flow guide cylinder; a bottom portion of the electromagnetic grading cylinder is fixedly connected to a top portion of a static outer shell of the centrifugal grading conical-frustum through a flange plate, and a rotary inner shell of the centrifugal grading conical-frustum is driven by a rotation apparatus; the swirling flow-sieving cylindrical sieve is disposed inside the electromagnetic grading cylinder, and a height-adjustable curved baffle is disposed on an outer side of the swirling flow-sieving cylindrical sieve; an electromagnetic generation apparatus is disposed inside a hollow outer shell of the electromagnetic grading cylinder; the vortex detection cylinder is inserted from the top portion of the feed flow guide cylinder from top to bottom and extends to the electromagnetic grading cylinder region; the minus sieve fine particle product discharge ports are symmetrically disposed on two sides of the electromagnetic grading cylinder; the overflow fine particle product discharge port is provided on a side surface of the vortex detection cylinder; and the underflow coarse particle product discharge port is disposed at the bottom portion of the centrifugal grading conical-frustum.
The multi-filed composition mainly includes a gravity field, a centrifugal force field, and an electromagnetic field.
An inner diameter of the feed flow guide cylinder, an inner diameter of the swirling flow-sieving cylindrical sieve, and an inner diameter of a big end of the centrifugal grading conical-frustum are kept the same.
A cylinder section height of the swirling flow-sieving cylindrical sieve and a cylinder section height of the electromagnetic grading cylinder are kept the same. Sieve bars of the swirling flow-sieving cylindrical sieve are arranged longitudinally. A size of sieve gaps of the swirling flow-sieving cylindrical sieve is 0.045 mm, 0.074 mm, 0.125 mm, 0.250 mm, or 0.500 mm.
A height of the single curved baffle is 1/10 to 1/8 of a height of the swirling flow- sieving cylindrical sieve, and a radian is 7/2. A joint surface between the curved baffle and the swirling flow-sieving cylindrical sieve is smooth.
The electromagnetic generation apparatus is disposed inside the hollow outer shell of the electromagnetic grading cylinder, and a range and electromagnetic field intensity of a generated electromagnetic field are adjustable.
The rotary inner shell of the centrifugal grading conical-frustum is driven by the rotation apparatus, and a rotation speed ranges from 500 revolutions/minute to 1000 revolutions/minute and is adjustable.
A quantity of tangential material feed ports is 2, and a quantity of minus sieve fine particle product discharge ports ranges from 2 to 4. During use, grading of particles under the combined action of the centrifugal force field, the gravity field, and the electromagnetic field may be implemented by disposing the swirling flow-sieving cylindrical sieve, the electromagnetic grading cylinder, and the centrifugal grading conical-frustum. After being fed into the feed flow guide cylinder from the tangential material feed port at a specific pressure, the material performs a downward spiral centrifugal motion under the action of the gravity field. When the material moves to the electromagnetic grading cylinder section, on the one hand, due to existence of the swirling flow-sieving cylindrical sieve, a large quantity of minus sieve fine particles pass through the sieve. On the other hand, under the action of the electromagnetic generation apparatus disposed in the hollow outer shell of the electromagnetic grading cylinder, sieve passing of magnetic fine particles is effectively promoted, and the material after passing through the sieve is discharged from the minus sieve fine particle product discharge port. The material that does not pass through the sieve continues moving downward spirally, and when the material moves to the centrifugal grading conical-frustum that rotates at a high speed, under the action of the centrifugal force field with specific intensity, the coarse particle material moves downward along a radial direction toward a side wall direction of the centrifugal grading conical-frustum, and is discharged from the underflow coarse particle product discharge port. A coarser particle indicates a higher speed of 5 moving toward the side wall direction of the centrifugal grading conical-frustum. Because the circulation area of the material in the centrifugal grading conical-frustum is continuously reduced as an axial depth of the centrifugal grading conical-frustum increases, a part of the fine particle material does not move downward spirally, and instead moves upward spirally, passes through the vortex detection cylinder, and is discharged from the overflow fine particle product discharge port.
A beneficial effect of the present invention is that: compared with the existing grading hydrocyclone technology, the present invention has the following advantages: (1) An electromagnetic generation apparatus with adjustable magnetic field intensity 1s disposed in the hollow outer shell of the electromagnetic grading cylinder, to effectively accelerate sieve passing of the magnetic fine particles, thereby improving the particle-sieving grading efficiency.
(2) A curved baffle 1s disposed at bottom portion of the swirling flow-sieving cylindrical sieve, to adjust a sieve-passing region of the swirling flow-sieving cylindrical sieve, and to eliminate the disadvantage of material backflow at the bottom portion of the swirling flow-sieving cylindrical sieve, thereby reducing a content of fine particles in the underflow and improving the grading efficiency.
(3) A centrifugal grading conical-frustum with an adjustable rotation speed is disposed, to flexibly adjust the centrifugal intensity of the material in the centrifugal grading conical-frustum region, promote coarse particles to enter the outer swirling flow and the fine particles to enter the inner swirling flow, thereby improving the grading efficiency and the grading precision.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an overall structure of the present invention.
DETAILED DESCRIPTION To make the implemented technical means, inventive features, and achieved objectives and effects of the present invention comprehensible, the present invention is further described with reference to the specific embodiments and accompanying drawings.
As shown in FIG. 1, multi-field composite fine particle grading device is provided, including an electromagnetic grading cylinder (2); a feed flow guide cylinder (1) disposed at an upper portion of the electromagnetic grading cylinder (2); a centrifugal grading conical-frustum (3) disposed at a lower portion of the electromagnetic grading cylinder (2); a swirling flow-sieving cylindrical sieve (2-1) disposed inside the electromagnetic grading cylinder (2); a vortex detection cylinder (4) inserting from a top portion of the feed flow guide cylinder (1) and extending to an electromagnetic grading cylinder (2) region; a tangential material feed port (1-1) entering the feed flow guide cylinder (1) along a tangential direction; a minus sieve fine particle product discharge port (2-3) provided on a side surface of the electromagnetic grading cylinder (2); an overflow fine particle product discharge port (4-1) provided at a top portion of the vortex detection cylinder (4); and an underflow coarse particle product discharge port (3-4) disposed at a bottom portion of the centrifugal grading conical-frustum (3), where the tangential material feed ports (1-1) are symmetrically disposed on two sides of the feed flow guide cylinder (1); a bottom portion of the electromagnetic grading cylinder (2) is fixedly connected to a top portion of a static outer shell (3-1) of the centrifugal grading conical- frustum (3) through a flange plate (2-5), and a rotary inner shell (3-2) of the centrifugal grading conical-frustum (3) is driven by a rotation apparatus (3-3); the swirling flow- sieving cylindrical sieve (2-1) is disposed inside the electromagnetic grading cylinder (2), and a height-adjustable curved baffle (2-4) is disposed on an outer side of the swirling flow-sieving cylindrical sieve (2-1); an electromagnetic generation apparatus (2-6) is disposed inside a hollow outer shell (2-2) of the electromagnetic grading cylinder (2); the vortex detection cylinder (4) 1s inserted from the top portion of the feed flow guide cylinder (1) from top to bottom and extends to the electromagnetic grading cylinder (2) region; the minus sieve fine particle product discharge ports (2-3) are symmetrically disposed on two sides of the electromagnetic grading cylinder (2); the overflow fine particle product discharge port (4-1) 1s provided on a side surface of the vortex detection cylinder (4); and the underflow coarse particle product discharge port (3-4) is disposed at the bottom portion of the centrifugal grading conical-frustum (3).
The multi-filed composition mainly includes a gravity field, a centrifugal force field, and an electromagnetic field.
An inner diameter of the feed flow guide cylinder (1), an inner diameter of the swirling flow-sieving cylindrical sieve (2-1), and an inner diameter of a big end of the centrifugal grading conical-frustum (3) are kept the same.
A cylinder section height of the swirling flow-sieving cylindrical sieve (2-1) and a cylinder section height of the electromagnetic grading cylinder (2) are kept the same. Sieve bars of the swirling flow-sieving cylindrical sieve (2-1) are arranged longitudinally. A size of sieve gaps of the swirling flow-sieving cylindrical sieve (2-1) 1s 0.045 mm,
0.074 mm, 0.125 mm, 0.250 mm, or 0.500 mm.
A height of the single curved baffle (2-4) is 1/10 of a height of the swirling flow- sieving cylindrical sieve (2-1), and a radian is t/2. A joint surface between the curved baftle (2-4) and the swirling flow-sieving cylindrical sieve (2-1) is smooth.
The electromagnetic generation apparatus (2-6) is disposed inside the hollow outer shell (2-2) of the electromagnetic grading cylinder (2), and a range and electromagnetic field intensity of a generated electromagnetic field are adjustable. The rotary inner shell (3-2) of the centrifugal grading conical-frustum (3) is driven by the rotation apparatus (3-3), and a rotation speed ranges from 500 revolutions/minute to 1000 revolutions/minute and is adjustable. A quantity of tangential material feed ports (1-1) is 2, and a quantity of minus sieve fine particle product discharge ports (2-3) ranges from 2 to 4. During use, grading of particles under the combined action of the centrifugal force field, the gravity field, and the electromagnetic field may be implemented by disposing the swirling flow-sieving cylindrical sieve (2-1), the electromagnetic grading cylinder (2), and the centrifugal grading conical-frustum (3). After being fed into the feed flow guide cylinder (1) from the tangential material feed port (1-1) at a specific pressure, the material performs a downward spiral centrifugal motion under the action of the gravity field. When the material moves to the electromagnetic grading cylinder (2) section, on the one hand, due to existence of the swirling flow-sieving cylindrical sieve (2-1), a large quantity of minus sieve fine particles pass through the sieve. On the other hand, under the action of the electromagnetic generation apparatus (2-6) disposed in the hollow outer shell (2-2) of the electromagnetic grading cylinder (2), sieve passing of magnetic fine particles is effectively promoted, and the material after passing through the sieve is discharged from the minus sieve fine particle product discharge port (2-3). The material that does not pass through the sieve continues moving downward spirally, and when the material moves to the centrifugal grading conical-frustum (3) that rotates at a high speed, under the action of the centrifugal force field with specific intensity, the coarse particle material moves downward along a radial direction toward a side wall direction of the centrifugal grading conical-frustum (3), and is discharged from the underflow coarse particle product discharge port (3-4). A coarser particle indicates a higher speed of moving toward the side wall direction of the centrifugal grading conical-frustum (3). Because the circulation area of the material in the centrifugal grading conical-frustum (3) is continuously reduced as an axial depth of the centrifugal grading conical-frustum (3) increases, a part of the fine particle material does not move downward spirally, and instead moves upward spirally, passes through the vortex detection cylinder (4), and is discharged from the overflow fine particle product discharge port (4-1).
In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "upper", "lower", "top", "bottom", "inner", and "outer" are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease and brevity of illustration and description of the present invention, rather than indicating or implying that the mentioned apparatus or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of the present invention.
The basic principles, main features, and advantages of the present invention are shown and described above. A person skilled in the art should understand that the present invention is not limited by the foregoing embodiments, descriptions in the foregoing embodiments and the specification merely describe the principles of the present invention, various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall all fall within the protection scope of the present invention. The protection scope of the present invention is subject to the appended claims and the equivalent.

Claims (6)

CONCLUSIESCONCLUSIONS 1. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes, omvattende een elektromagnetische classificatiecilinder (2), een toevoeromleidingscilinder (1) aangebracht op het bovenste deel van de elektromagnetische classificatiecilinder (2), een centrifugale classificatieconus (3) aangebracht op de onderste deel van de elektromagnetische classificatiecilinder (2), een cilindrisch scherm voor cycloonafscherming (2-1) dat is aangebracht in de elektromagnetische classificatiecilinder (2), een werveldetectiecilinder (4) die wordt ingebracht vanaf de bovenkant van de toevoeromleidingscilinder (1) en zich uitstrekt naar het gebied van de elektromagnetische classificatiecilinder (2), een tangentiële grondstofinlaat (1-1) die de toevoeromleidingscilinder (1) binnenkomt langs de tangentiéle richting, een onderzeefproductuitlaat voor fijne deeltjes (2-3) aangebracht aan de zijkant van de elektromagnetische classificatiecilinder (2), een overstroomproductuitlaat voor fijne deeltjes (4-1) aangebracht op de bovenkant van de vortexdetectiecilinder (4) en een onderstroomproductuitlaat voor grove deeltjes (3-4) aangebracht aan de onderkant van de centrifugale classificatieconus (3), met het kenmerk, dat de tangentiële grondstofinlaten (1-1) symmetrisch zijn gerangschikt aan beide zijden van de toevoeromleidingscilinder (1), en de onderkant van de elektromagnetische classificatiecilinder (2) vast is verbonden met de bovenkant van de stationaire schaal (3-1) van de centrifugale classificatieconus (3) via een flens (2-5), en de roterende binnenschaal (3-2) van de centrifugale classificatieconus (3) door het roterende apparaat (3-3) wordt aangedreven, en met een cilindrisch scherm voor cycloonafscherming (2-1) binnen de elektromagnetische classificatiecilinder (2) is uitgerust, en met een in hoogte verstelbare boogschot (2-4) buiten het cilindrisch scherm voor cycloonafscherming (2-1) is uitgerust, en de holle schaal (2-2) van de elektromagnetische classificatiecilinder (2) met een elektromagnetische generator (2-6) is uitgerust, en de vortexdetectiecilinder (4) die vanaf de bovenkant van de voeromleidingscilinder (1) vanaf boven naar beneden wordt ingebracht en zich uitstrekt tot het gebied van de elektromagnetische classificatiecilinder (2), en de onderzeefproductuitlaten voor fijne deeltjes (2-3) symmetrisch zijn gerangschikt aan beide zijden van de elektromagnetische classificatiecilinder (2), en de overstroom fijne deeltjes productuitlaat (4-1) aan de zijkant van de vortexdetectiecilinder (4) is aangebracht, en de onderstroomproductuitlaat voor grove deeltjes (3-4) bevindt zich aan de onderkant van de centrifugale classificatieconus (3).1. Multiple-field composite fine particle classification equipment, comprising an electromagnetic classification cylinder (2), a feed bypass cylinder (1) mounted on the upper part of the electromagnetic classification cylinder (2), a centrifugal classification cone (3) mounted on the lower part of the electromagnetic classification cylinder (2), a cylindrical screen for cyclone shielding (2-1) arranged in the electromagnetic classification cylinder (2), a vortex detecting cylinder (4) inserted from the top of the feed bypass cylinder (1) and extending to the area of the electromagnetic classification cylinder (2), a tangential raw material inlet (1-1) entering the feed bypass cylinder (1) along the tangential direction, a fine particle subscreen product outlet (2-3) arranged on the side of the electromagnetic classification cylinder (2), an overflow product outlet for fine particles (4- 1) arranged on the top of the vortex detection cylinder (4) and an underflow product outlet for coarse particles (3-4) arranged on the bottom of the centrifugal classification cone (3), characterized in that the tangential raw material inlets (1-1) are symmetrical arranged on both sides of the feed bypass cylinder (1), and the bottom of the electromagnetic classification cylinder (2) is fixedly connected to the top of the stationary shell (3-1) of the centrifugal classification cone (3) through a flange (2-5 ), and the rotary inner shell (3-2) of the centrifugal classification cone (3) is driven by the rotary device (3-3), and with a cylindrical screen for cyclone shield (2-1) inside the electromagnetic classification cylinder (2) is equipped, and equipped with a height-adjustable bow baffle (2-4) outside the cylindrical screen for cyclone shielding (2-1), and the hollow shell (2-2) of the electromagnetic classification cylinder (2) equipped with an electromagnetic generator (2-6), and the vortex detecting cylinder (4) introduced from the top of the feed bypass cylinder (1) from top to bottom and extending to the area of the electromagnetic classification cylinder (2), and the fine particle undersieve product outlets (2-3) are arranged symmetrically on both sides of the electromagnetic classification cylinder (2), and the overflow fine particle product outlet (4-1) is arranged on the side of the vortex detection cylinder (4), and the underflow product outlet for coarse particles (3-4) is located at the bottom of the centrifugal classification cone (3). 2. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes volgens conclusie 1, met het kenmerk dat het cilindrisch scherm voor cycloonafscherming (2-1), de toevoeromleidingscilinder (1) en het brede uiteinde van de centrifugale classificatieconus (3) dezelfde binnendiameter behouden, en de elektromagnetische classificatiecilinder (2) en het cilindrische scherm voor cycloonafscherming (2-1) dezelfde kolomhoogte behouden, en de binnendiameter van de elektromagnetische classificatiecilinder (2) 1,2-1,4 maal is van het cilindrisch scherm voor cycloonafschermig (2-1), en de binnendiameter van de vortexdetectiecilinder (4) 0,1-0,2 maal is van het cilindrisch scherm voor cycloonafscherming (2-1).The multiple-field composite fine particle classification apparatus according to claim 1, characterized in that the cylindrical cyclone shielding screen (2-1), the feed bypass cylinder (1) and the wide end of the centrifugal classification cone (3) keep the same inner diameter, and the electromagnetic classification cylinder (2) and the cylindrical screen for cyclone shield (2-1) keep the same column height, and the inner diameter of the electromagnetic classification cylinder (2) is 1.2-1.4 times of the cylindrical screen for cyclone shield (2-1 ), and the inner diameter of the vortex detection cylinder (4) is 0.1-0.2 times that of the cylindrical screen for cyclone shield (2-1). 3. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes volgens conclusie 1, met het kenmerk dat het cilindrisch scherm voor cycloonafscherming (2-1) longitudinaal is aangebracht, en het boogschot (2-4) zich buiten het cilindrisch scherm voor cycloonafscherming (2-1) bevindt, de radiaal van het enkele boogschot (2-4) 7/2 is, en de hoogte van het enkele boogschot (2-4) 1/10 van de hoogte van het cilindrisch scherm voor cycloonafscherming (2-1) is, en de installatiehoeveelheid en installatiehoogte van het boogschot (2-4) volgens de behoeften worden bepaald.The multi-field composite fine particle classification apparatus according to claim 1, characterized in that the cylindrical cyclone shielding screen (2-1) is arranged longitudinally, and the arc baffle (2-4) is outside the cylindrical cyclone shielding screen (2- 1), the radian of the single bow baffle (2-4) is 7/2, and the height of the single bow baffle (2-4) is 1/10 of the height of the cylindrical screen for cyclone shield (2-1) , and the installation quantity and installation height of the bow baffle (2-4) are determined according to the needs. 4. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes volgens conclusie 1, met het kenmerk dat de elektromagnetische generator (2-6) de holle schaal (2- 2) van de elektromagnetische classificatiecilinder (2) van boven naar beneden omgeeft, en het bereik en de intensiteit van het elektromagnetische veld dat wordt gegenereerd door de elektromagnetische generator (2-6) instelbaar zijn.The multiple-field composite fine particle classification apparatus according to claim 1, characterized in that the electromagnetic generator (2-6) surrounds the hollow shell (2-2) of the electromagnetic classification cylinder (2) from top to bottom, and the range and the intensity of the electromagnetic field generated by the electromagnetic generator (2-6) is adjustable. 5. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes volgens conclusie 1, met het kenmerk dat de roterende binnenschaal (3- 2) van de centrifugale classificatieconus (3) door het roterende apparaat (3-3) wordt aangedreven, en de rotatiesnelheid van de roterende binnenschaal (3-2) 500-1000 tpm is.The multi-field composite fine particle classification apparatus according to claim 1, characterized in that the rotating inner shell (3-2) of the centrifugal classification cone (3) is driven by the rotating apparatus (3-3), and the rotational speed of the rotating inner shell (3-2) is 500-1000 rpm. 6. Meerdere-veld composiet classificatieapparatuur voor fijne deeltjes volgens conclusie 1, met het kenmerk dat het aantal tangentiële grondstofinlaten (1-1) van de toevoeromleidingscilinder (1) 2 is, en het aantal onderzeefproductuitlaten voor fijne deeltjes (2-3) 2-4 1s.The multi-field composite fine particle classification equipment according to claim 1, characterized in that the number of tangential raw material inlets (1-1) of the feed bypass cylinder (1) is 2, and the number of fine particle subscreen product outlets (2-3) is 2- 4 1s. -0-0-0-0-0--0-0-0-0-0-
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