CN215235028U

CN215235028U - Electromagnetic gravity separator

Info

Publication number: CN215235028U
Application number: CN202022649670.XU
Authority: CN
Inventors: 吴亚坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-12-21
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses an electromagnetic gravity separator, relating to the field of fine iron powder screening; the ore-feeding device comprises an ore-feeding hopper, a blanking pipe, a separation barrel, a concentrate conical barrel, an excitation coil bracket and an excitation coil bracket, wherein the bottom of the ore-feeding hopper is connected with the blanking pipe, the excitation coil bracket is welded in the separation barrel, excitation coils are uniformly arranged on the excitation coil bracket from top to bottom, and a product-lifting disc is welded at the lower part of the separation barrel; the material feeding pipe is obliquely connected with the inner wall of the product lifting disc, the tangential direction of the outer wall of the product lifting disc is connected with the water adding valve, clear water is injected into the product lifting disc through the water adding valve, and circular water is fed tangentially from the bottom, so that slime, monomer gangue, intergrowth and impurities can be efficiently separated, magnetic ores are elutriated and cleaned, the iron grade of magnetite concentrate is greatly improved, the quality improvement and impurity reduction are practically realized, the energy is saved, the yield is increased, and greater economic benefits are created for enterprises.

Description

Electromagnetic gravity separator

Technical Field

The utility model relates to a fine iron powder screening field specifically is an electromagnetism reselects machine.

Background

The fine processing of the iron ore is a process of separating iron-containing components in the ore through crushing, grinding, magnetic separation, flotation or gravity separation and other ore separation treatments, removing useless impurities and improving the grade of the ore. The iron ore of higher grade obtained after processing is generally called iron concentrate.

The column type magnetic and gravity separation equipment is widely applied to magnetic mineral separation by virtue of excellent performance. At present, most magnet concentration plants generally adopt conventional permanent magnet drum magnetic separators, magnetic agglomeration neutral separators, magnetic separation columns and other equipment to remove impurities and extract products from concentrates. The conventional permanent magnet drum magnetic separator is easy to have the phenomenon of magnetic agglomeration in the selection process, and the product extraction amplitude is limited; the magnetic field of the magnetic agglomeration gravity separator is generated by permanent magnetic substances in the separation cylinder, the magnetic field is fixed and is not easy to adjust, and the separation effect is not ideal.

The magnetic field of the magnetic separation column is generated by an outer coil of the separation cylinder, the alternating change period of the magnetic field and the magnetic field intensity can be adjusted, the separation effect is ideal, only part of the magnetic field enters the separation cylinder, the utilization rate of the magnetic field is low, the separation cylinder is made of non-magnetic-conductive stainless steel materials, the manufacturing cost is high, more electricity is consumed, the ore separation cost is high, a non-magnetic area exists in an upper overflow area of the separation cylinder, the grade of magnetic iron in overflow tailings is high, and the recovery rate of concentrate is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetism reselects machine to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an electromagnetic gravity separator comprises a separation cylinder, an ore feeding hopper, a blanking pipe, a water adding valve and a product lifting disc. The ore feeding hopper and the blanking pipe are arranged on the upper portion of the excitation coil support, the tailing overflow device is arranged at the top of the separation barrel, the tailing overflow density sensing device is further arranged at the joint of the separation barrel and the tailing overflow device, and the separation barrel is made of a 3 mm-thick iron material, so that the manufacturing cost is effectively reduced. The sorting cylinder is characterized in that a concentrate conical cylinder is arranged at the bottom of the sorting cylinder, a concentrate density sensing device is arranged between the concentrate conical cylinder and a concentrate discharge valve, a water adding valve is arranged along the tangential direction of the outer wall of the product lifting disc, clear water is injected into the product lifting disc through the water adding valve, and circulating water is fed in from the bottom through a material feeding pipe in the tangential direction.

The separation cylinder is internally provided with an excitation coil and an excitation coil bracket, the excitation coil is supported by the excitation coil bracket and is uniformly sleeved from top to bottom, the separation cylinder is provided with a double-layer protective layer, the protective layer is protected by a jacket made of materials such as BOPP (biaxially-oriented polypropylene), hemp and the like, and the separation cylinder has waterproof and wear-resistant effects; the excitation coils are 9 groups in total, the excitation coil on the uppermost layer is used for supplying constant direct current, the rest excitation coils are used for being respectively and sequentially conducted, and the conduction time and the current magnitude are automatically or manually adjusted according to the overflow density and the sorting condition.

The excitation coil adopts a discontinuous direct current pulse power supply mode, so that the magnetic field of the excitation coil is occasionally absent, a magnetic field which moves down in sequence is formed, the washing dispersion effect of ascending water flow is enhanced, the excitation coil can be supplied with power by a control transformer and is reduced to safe voltage, an isolation effect is achieved, the control circuit controls the excitation coil, the safety is obviously improved, the utilization rate of the magnetic field of the excitation coil is greatly improved, the phenomenon of pattern turning and black running is greatly reduced, the equipment cost is effectively reduced, and the energy-saving purpose is realized.

The lower part of the separation cylinder is provided with a product lifting disc, the product lifting disc is welded with the concentrate conical cylinder, the separation cylinder, the water adding valve and the excitation coil support, cylindrical buffer columns and 8 material conveying pipes which are uniformly distributed are arranged in the product lifting disc, and the material conveying pipes are obliquely connected with the inner wall of the product lifting disc.

As a further aspect of the present invention: the blanking pipe is provided with 8 blanking pipes, and 8 blanking pipes are uniformly distributed at the bottom of the ore feeding hopper to form a circumferential shape, so that uniform distribution is realized.

As a further aspect of the present invention: the tailing overflow device is in an open inclined-cutting column shape.

As a further aspect of the present invention: the concentrate cone is formed by welding 4 same trapezoidal iron plates, the whole concentrate cone is at a concentrate ore removal angle of 45 degrees, and the concentrate ore removal effect is good.

As a further aspect of the present invention: the concentrate density sensing device is of an integrated structure, mainly made of stainless steel and arranged between the concentrate conical barrel at the bottom of the separation barrel and the concentrate discharge valve.

As a further aspect of the present invention: the ore concentrate discharge valve is arranged below the ore concentrate density sensing device, and the ore pulp data are monitored in real time through the ore concentrate density sensing device so as to be linked with the ore concentrate discharge valve.

As a further aspect of the present invention: the tailing overflow density sensing device adopts an integrated structure, mainly adopts stainless steel materials and is arranged at the top of the separation barrel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has 8 blanking pipes arranged on the blanking pipe of the ore feeding bucket, which are evenly distributed on the ore feeding bucket in a round shape, thus realizing even distribution; the sorting cylinder is made of iron materials with the thickness of 3mm, so that the manufacturing cost is effectively reduced; the excitation coil is provided with a double-layer protective layer, and the protective layer is protected by a jacket made of materials such as BOPP (biaxially-oriented polypropylene), hemp and the like, so that the excitation coil has waterproof and wear-resistant effects; the intermittent direct current pulse power supply mode is adopted, so that the magnetic field of the magnet exciting coil is sometimes absent, a magnetic field moving downwards in sequence is formed, the washing and dispersing effects of ascending water flow are enhanced, and the obvious effect of improving the concentrate grade is achieved; the material feeding pipe is obliquely connected with the inner wall of the product lifting disc, the tangential direction of the outer wall of the product lifting disc is connected with the water adding valve, clear water is injected into the product lifting disc through the water adding valve, and circular water is fed tangentially from the bottom, so that slime, monomer gangue, intergrowth and impurities can be efficiently separated, magnetic ores are elutriated and cleaned, the iron grade of magnetite concentrate is greatly improved, the quality improvement and impurity reduction are practically realized, the energy is saved, the yield is increased, and greater economic benefits are created for enterprises.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the ore hopper and the blanking pipe;

fig. 3 is a schematic view of the structure of the lifting plate.

Notations for reference numerals: the device comprises an ore feeding hopper and discharging pipe 1, a tailing overflow device 2, a separation cylinder 3, an excitation coil 4, an excitation coil support 5, a product lifting disc 6, a concentrate conical cylinder 7, a concentrate density sensing device 8, a concentrate discharge valve 9, a water adding valve 10 and a tailing overflow density sensing device 11.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the drawings or description, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practical applications. The embodiments of the present invention are provided only for illustration, and not for limiting the scope of the present invention. Any obvious and obvious modifications or alterations to the present invention can be made without departing from the spirit and scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, an electromagnetic gravity separator includes an ore feeding hopper 1, a blanking pipe 12, a separation cylinder 3, a concentrate cone cylinder 7, an excitation coil 4, and an excitation coil support 5, wherein the bottom of the ore feeding hopper 1 is connected to the blanking pipe 12, the excitation coil support 5 is welded in the separation cylinder 3, the excitation coil 4 is uniformly arranged on the excitation coil support 5 from top to bottom, a product lifting disc 6 is welded on the lower portion of the separation cylinder 3, the bottom of the ore feeding hopper 1 is connected to 8 blanking pipes 12, the excitation coil 4 is provided with 9 groups, the excitation coil 4 on the uppermost layer is used for supplying constant direct current, the rest is used for sequentially conducting in groups, the conduction time and the current magnitude are adjusted according to overflow density and separation conditions, the excitation coil 4 adopts a discontinuous direct current pulse power supply mode, the concentrate cone cylinder 7 is welded on the lower portion of the product lifting disc 6, and a water adding valve 10 is welded on the outer side of the lifting plate 6.

In this embodiment, the electromagnetic coil 4 is supplied by the DC electric control cabinet through the electromagnetic concentration concentrator, a pulse excitation magnetic field moving downwards in sequence is formed in the separation chamber of the electromagnetic concentration concentrator, and low-speed water flow is injected from the lower extraction disc 6. The treated slurry is injected from the upper hopper 1 and the blanking pipe 12. Under the action of the self gravity of the ore pulp and a magnetic field, magnetic ore particles are purified and purified through repeated magnetic polymerization and dispersion, ferromagnetic minerals in the ore pulp move downwards to produce high-grade magnetite concentrate and flow out from the lower part, circulating water is fed tangentially from the bottom, monomer gangue, slime, intergrowth and the like flow upwards along with water flow and flow out from a tailing overflow device 2, and therefore the purpose of separating the beneficiated tailings of ore dressing is achieved.

In this embodiment, a tailing overflow device 2 and a tailing overflow density sensing device 11 are respectively installed on the upper portion of a separation barrel 3, 9 groups of excitation coils 4 with double-layer BOPP and a linen protective layer are uniformly arranged in the separation barrel 3 from top to bottom through an excitation coil support 5, the protective layer has waterproof and wear-resistant effects, the excitation coil 4 on the uppermost layer is used for supplying constant direct current, iron concentrate powder is prevented from overflowing along with the tailing, the rest excitation coils are used for being grouped and sequentially conducted, the conducting time and the current magnitude are adjusted according to the overflow density and the separation condition, a discontinuous direct current pulse power supply mode is adopted, the magnetic field of the excitation coil 4 is enabled to be intermittent, a magnetic field which sequentially moves downwards is formed, the washing dispersion effect of ascending water flow is enhanced, and the effect of improving the concentrate grade is obvious. The upper part of the separation barrel 3 is respectively provided with an ore feeding hopper 1 and a discharging pipe 12, the ore feeding hopper 1 and the discharging pipe 12 are connected with the excitation coil bracket 5 in a welding way, the ore feeding hopper 1 is connected with 8 discharging pipes 12, and the discharging pipes 12 are uniformly distributed at the bottom of the ore feeding hopper 1 to form a circumference shape so as to realize uniform distribution.

Referring to fig. 1, in another embodiment of the present invention, the bottom of the separation cylinder 3 is respectively provided with a concentrate cone 7, a product lifting disc 6 and a water adding valve 10, the product lifting disc 6 is internally provided with cylindrical buffer columns and 8 material feeding pipes which are uniformly distributed, and the material feeding pipes are connected with the inner wall of the product lifting disc 6 in an inclined manner.

In this embodiment, the product extracting disc 6 is connected with the water adding valve 10 in the tangential direction of the outer wall of the product extracting disc, clear water is injected into the product extracting disc 6 through the water adding valve 10, and circular water is fed tangentially from the bottom, so that slime, monomer gangue, intergrowth and impurities can be efficiently separated, and the iron grade of the magnetite concentrate is greatly improved.

Referring to fig. 1, in another embodiment of the present invention, a concentrate density sensing device 8 is installed between the concentrate cone 7 at the bottom of the separation cylinder 3 and the concentrate discharge valve 9, and the concentrate density sensing device 8 is mainly used for real-time monitoring of the overflow density of the tailings and the concentrate density, and is made of an integrated stainless steel material, so that the maintenance is convenient and fast, and the device is sturdy and durable.

In this embodiment, a concentrate discharge valve 9 is arranged below the concentrate density sensing device 8, and the opening degree of the concentrate discharge valve 9 can be adjusted according to the concentrate density and the separation condition.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An electromagnetic gravity separator comprises an ore feeding hopper (1), a blanking pipe (12), a separation cylinder (3), a concentrate cone cylinder (7), an excitation coil (4) and an excitation coil support (5), wherein the bottom of the ore feeding hopper (1) is connected with the blanking pipe (12), the excitation coil support (5) is welded in the separation cylinder (3), the excitation coil (4) is uniformly arranged on the excitation coil support (5) from top to bottom, and a product lifting disc (6) is welded at the lower part of the separation cylinder (3); the ore feeding device is characterized in that 8 blanking pipes (12) are connected to the bottom of the ore feeding hopper (1), 9 groups of excitation coils (4) are arranged, the excitation coils (4) on the uppermost layer are used for supplying constant direct current, the rest of the excitation coils are used for being grouped and sequentially conducted, the conducting time and the current size are adjusted according to the overflow density and the sorting condition, the excitation coils (4) adopt a discontinuous direct current pulse power supply mode, a concentrate conical barrel (7) is welded on the lower portion of an article lifting disc (6), and a water adding valve (10) is welded on the outer side of the article lifting disc (6).

2. The electromagnetic gravity separator according to claim 1, wherein the concentrate cone (7) is formed by welding 4 identical trapezoidal iron plates and has a concentrate ore removal angle of 45 degrees.

3. The electromagnetic gravity separator according to claim 1, wherein a cylindrical buffer column and 8 feeding pipes are uniformly distributed in the article lifting disc (6).

4. The electromagnetic gravity separator according to claim 1, wherein the upper part of the separation cylinder (3) is connected with a tailings overflow device (2), the tailings overflow device (2) is in an open type oblique cutting column shape, and a tailings overflow density sensing device (11) is further arranged at the upper part of the separation cylinder (3).

5. The electromagnetic gravity separator according to claim 1, wherein a concentrate discharge valve (9) is connected to the lower portion of the concentrate cone (7), and a concentrate density sensing device (8) is arranged between the concentrate cone (7) and the concentrate discharge valve (9).