CN211099535U

CN211099535U - Device for recovering clean coal from middlings and waste rocks

Info

Publication number: CN211099535U
Application number: CN201921913114.XU
Authority: CN
Inventors: 范吉井
Original assignee: Inner Mongolia Guanglilong Energy Co Ltd
Current assignee: Inner Mongolia Guanglilong Energy Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-07-28
Anticipated expiration: 2029-11-07

Abstract

The utility model relates to the technical field of clean coal recovery, and discloses a device for recovering clean coal from medium coal and gangue, which comprises a bracket, a crushing cavity, a feed inlet, a dense medium cyclone and a fine grinding box; broken chamber, the inside in broken chamber is rotated and is had broken wheel, the bottom in broken chamber communicates the unloading passageway that has a set of bending right, the bottom of unloading passageway communicates heavy-medium cyclone's left side wall middle part, heavy-medium cyclone sets up to the state that barrel construction and low right height in a left side, the downward intercommunication in bottom left side of heavy-medium cyclone has the waste rock passageway, the downward intercommunication in bottom right side has the clean coal passageway, the bottom of clean coal passageway communicates right there is the microgrinding case, the inside roll of microgrinding case is provided with a set of horizontal grinding roller, the filtration pore has been seted up to the bottom of microgrinding case, the downside of microgrinding case has the flocculating agent groove. The utility model has the advantages that: the middlings are recycled by multiple groups of processes, the middlings are fully recycled, and the clean coal obtained by separation has high purity and quality.

Description

Device for recovering clean coal from middlings and waste rocks

Technical Field

The utility model relates to a clean coal retrieves technical field, specifically is a retrieve device of clean coal from middlings and waste rock.

Background

In the existing coal washing process technology, a bucket elevator generally conveys mixed middlings and gangue to a belt conveyor and then discharges the middlings and the gangue, but part of clean coal in the middlings is mixed and is not recycled and directly discharged, so that the waste of the clean coal is caused.

Chinese patent (publication No. CN 206969777U, publication No. 2018.02.06) discloses a device for recovering clean coal from medium coal and gangue, which comprises a bucket elevator, a jigger, an output device, a coal storage bin and a recovery coal chute pipeline; the lower extreme of bucket elevator left side is equipped with the entrance point, and bucket elevator right side upper end is equipped with the exit end, and the exit end is located directly over the jigger entry end, and the exit end of jigger upper portion right side is located directly over the output device entry end, is equipped with another exit end in jigger lower part bottom, and the exit end is through retrieving the coal scuttle pipeline and storing up coal bunker entrance point intercommunication. The device only separates through the jigging machine for the precision of the clean coal who obtains is general, and the processing procedure is too simple, is unfavorable for the abundant recycle of middlings.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a retrieve device of clean coal in follow middling coal and waste rock to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a device for recovering clean coal from middlings and waste rocks comprises a bracket, a crushing cavity, a feeding hole, a dense medium cyclone and a fine grinding box; broken chamber, dense medium cyc lone and fine grinding case from left to right set gradually and all carry out fixed stay through the support, and the top intercommunication in broken chamber has the feed inlet that is loudspeaker column structure, and the inside in broken chamber rotates has broken wheel, carries out broken handle through the middle part that broken wheel pair entered into broken intracavity portion. The bottom of broken chamber communicates right has a set of crooked unloading passageway, and the bottom of unloading passageway communicates the left side wall middle part of dense medium cyc lone, and dense medium cyc lone sets up to barrel construction and the low right high state in a left side, and inside is provided with a set of helical push rod with the same axle center with the dense medium cyc lone, and helical push rod's fixed surface installs a plurality of sets of helical tooth, and the rotation through the helical tooth can drive the inside object of dense medium cyc lone and remove. The right end of the spiral push rod penetrates through the side wall of the dense medium cyclone and is connected with a motor in a rotating mode, the spiral push rod is driven to rotate by the starting motor, and then objects inside the dense medium cyclone are pushed to move through spiral teeth on the surface of the spiral push rod. The heavy medium cyclone is a recognized technical device, the top on the left side of the heavy medium cyclone is communicated with a group of vertical heavy medium suspension liquid inlets, the left side of the bottom of the heavy medium cyclone is communicated with a gangue channel downwards, the right side of the bottom of the heavy medium cyclone is communicated with a clean coal channel downwards, the tail end of the gangue channel is communicated with a gangue collecting box fixedly arranged on the ground, crushed middlings are input into the heavy medium cyclone, then the heavy medium suspension liquid is input into the heavy medium cyclone, the gangue and clean coal are separated after being processed in the heavy medium cyclone, then the separated gangue firstly enters the gangue channel under the action of gravity and then enters the gangue collecting box, and clean coal with smaller gravity is input into the clean coal channel under the spiral pushing of a spiral pushing rod due to the fact that the gravity of the gangue is greater than the gravity of the clean coal. The bottom of clean coal passageway communicates to the right and has the fine grinding case, the inside roll of fine grinding case is provided with a set of horizontal grinding roller, the lateral wall that the right-hand member of grinding roller passed the fine grinding case is connected with the rotating electrical machines, the filtration pore has been seted up to the bottom of fine grinding case, carry out the fine grinding powder in inputting the clean coal that will separate into the fine grinding case, then fall into the flocculating agent groove of setting in the fine grinding case below through the filtration pore, be provided with the flocculating agent in the flocculating agent groove, can make hydrophobic clean coal granule form the wadding of a definite size through the flocculating agent, the conventional flotation method of reuse is distinguished the wadding, and hydrophilic mineral still suspends in the flocculating agent groove, thereby further purification separation with the clean coal, improve the precision of clean coal.

As a further aspect of the present invention: and control valves are arranged on the clean coal channel and the gangue channel.

As a further aspect of the present invention: the distance between the outer surface of the grinding roller and the inner surface of the fine grinding box is less than 0.5mm, so that the clean coal can be fully ground.

As a further aspect of the present invention: the top of the blanking channel is arranged to be of a grid structure, and the crushed middlings in the crushing cavity can only pass through.

As a further aspect of the present invention: the top of feed inlet is provided with a set of coarse strainer, and coarse strainer's setting is used for carrying out the coarse filtration to the middlings that gets into all crushing intracavity portion, removes the great impurity that wherein contains, and then improves subsequent quality of retrieving the cleaned coal.

Compared with the prior art, the beneficial effects of the utility model are that: crushing middlings to be separated in a crushing cavity, inputting the middlings into a dense medium cyclone for separation, separating gangue from clean coal, inputting the clean coal into a fine grinding box through a clean coal channel for fine grinding, then falling into a flocculating agent tank to be mixed with a flocculating agent to form a floc with a certain size, separating the floc by using a conventional flotation method, suspending hydrophilic minerals in the flocculating agent tank, and separating and purifying the clean coal through multiple steps, so that the clean coal obtained by separation can be ensured to be in high quality; the spiral push rod is arranged on the heavy medium cyclone, so that the output of clean coal and gangue in the heavy medium cyclone is accelerated.

Drawings

FIG. 1 is a schematic structural diagram of an apparatus for recovering clean coal from middlings and gangue.

FIG. 2 is a schematic structural diagram of a dense medium cyclone in a device for recovering clean coal from middlings and gangue.

FIG. 3 is a schematic view showing the construction of a fine grinding box in an apparatus for recovering clean coal from middlings and gangue.

Wherein: the device comprises a support 10, a crushing cavity 11, a crushing wheel 12, a feeding hole 13, a coarse filter screen 14, a blanking channel 15, a dense medium cyclone 16, a dense medium suspension inlet 17, a spiral push rod 18, a motor 19, a gangue channel 20, a gangue collecting box 21, a clean coal channel 22, a control valve 23, a fine grinding box 24, a grinding roller 25, a filter hole 26, a flocculating agent groove 27 and a rotating motor 28.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example one

Referring to fig. 1-3, a device for recovering clean coal from medium coal and gangue comprises a bracket 10, a crushing cavity 11, a feed inlet 13, a dense medium cyclone 16 and a fine grinding box 24; the crushing cavity 11, the dense medium cyclone 16 and the fine grinding box 24 are sequentially arranged from left to right and are fixedly supported by the bracket 10. The top end of the crushing cavity 11 is communicated with a feeding hole 13 with a trumpet-shaped structure, a crushing wheel 12 rotates inside the crushing cavity 11, and the middle part entering the inside of the crushing cavity 11 is crushed through the crushing wheel 12. The bottom of the crushing cavity 11 is communicated with a group of bent blanking channels 15 rightwards, the bottom end of each blanking channel 15 is communicated with the middle of the left side wall of the heavy medium cyclone 16, the top of each blanking channel 15 is of a grid structure, and only crushed middlings in the crushing cavity 11 can pass through. The dense medium cyclone 16 is set to be in a cylinder structure and is in a state of being low on the left and high on the right, a group of spiral push rods 18 coaxial with the dense medium cyclone 16 are arranged inside the dense medium cyclone, a plurality of groups of spiral teeth are fixedly arranged on the surface of each spiral push rod 18, and objects inside the dense medium cyclone 16 can be driven to move through the rotation of the spiral teeth. The right end of the spiral push rod 18 penetrates through the side wall of the heavy medium cyclone 16 to be connected with a motor 19 in a rotating mode, the motor 19 is started to drive the spiral push rod 18 to rotate, and then objects inside the heavy medium cyclone 16 are pushed to move through spiral teeth on the surface of the spiral push rod 18. The heavy medium cyclone 16 is a well-known technical device, the top of the left side of the heavy medium cyclone 16 is communicated with a group of vertical heavy medium suspension liquid inlets 17, the left side of the bottom of the heavy medium cyclone 16 is communicated with a gangue channel 20 downwards, the right side of the bottom is communicated with a clean coal channel 22 downwards, the tail end of the gangue channel 20 is communicated with a gangue collecting box 21 fixedly placed on the ground, the crushed middlings are fed into the dense medium cyclone 16, then the dense medium suspension is fed into the dense medium cyclone 16, the gangue is separated from the clean coal after being treated in the dense medium cyclone 16, and then the separated gangue firstly enters a gangue channel 20 under the action of gravity because the gravity of the gangue is greater than that of the clean coal, and then enters the gangue collecting box 21, and the clean coal with lower gravity is input into the clean coal channel 22 under the spiral pushing of the spiral push rod 18. The clean coal channel 22 and the gangue channel 20 are both provided with a control valve 23, the bottom end of the clean coal channel 22 is communicated with a fine grinding box 24 rightwards, a group of transverse grinding rollers 25 are arranged inside the fine grinding box 24 in a rolling manner, the distance between the outer surface of the grinding rollers 25 and the inner surface of the fine grinding box 24 is less than 0.5mm, so that the clean coal can be conveniently and fully ground, the right end of the grinding rollers 25 penetrates through the side wall of the fine grinding box 24 and is connected with a rotating motor 28, the bottom of the fine grinding box 24 is provided with a filtering hole 26, the separated clean coal is input into the fine grinding box 24 to be finely ground and then falls into a flocculating agent groove 27 arranged below the fine grinding box 24 through the filtering hole 26, a flocculating agent is arranged in the flocculating agent groove 27, hydrophobic clean coal particles can form a certain size of floc through the flocculating agent, the floc is separated by using a conventional flotation method, and hydrophilic minerals are still suspended in the flocculating agent groove 27, thereby further purifying and separating the clean coal and improving the precision of the clean coal.

The utility model discloses a theory of operation is: firstly, the middlings to be separated are input into a crushing cavity 11 through a feeding hole 13 to be crushed, then the crushed middlings are input into a dense medium cyclone 16 through a discharging channel 15 to be separated, so that gangue is separated from clean coal, the gangue is input into a gangue collecting box 21 through a gangue channel 20 to be stored, the clean coal is input into a fine grinding box 24 through a clean coal channel 22 to be finely ground, then the clean coal falls into a flocculating agent tank 27 to be mixed with a flocculating agent to form a floc with a certain size, the floc is separated by using a conventional flotation method, and hydrophilic minerals are still suspended in the flocculating agent tank 27.

Example two

On the basis of the first embodiment, a group of coarse strainers 14 are arranged at the top of the feeding port 13, and the coarse strainers 14 are arranged for performing coarse filtration on the middlings entering the crushing chamber 11 to remove larger impurities contained in the middlings, so that the quality of the subsequent recovered clean coal is improved.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A device for recovering clean coal from medium coal and gangue comprises a bracket (10), a crushing cavity (11), a feed inlet (13), a dense medium cyclone (16) and a fine grinding box (24); the crushing cavity (11), the dense medium cyclone (16) and the fine grinding box (24) are sequentially arranged from left to right and are fixedly supported by a support (10), the top end of the crushing cavity (11) is communicated with a feed inlet (13) in a horn-shaped structure, the heavy medium cyclone is characterized in that a crushing wheel (12) rotates inside the crushing cavity (11), the bottom of the crushing cavity (11) is communicated with a group of bent blanking channels (15) rightwards, the bottom end of each blanking channel (15) is communicated with the middle part of the left side wall of the dense medium cyclone (16), the dense medium cyclone (16) is arranged in a cylinder structure and is in a state of being low at the left and high at the right, a group of spiral push rods (18) coaxial with the dense medium cyclone (16) are arranged inside the heavy medium cyclone (11), a plurality of groups of spiral teeth are fixedly arranged on the surface of each spiral push rod (18), and the right end of each spiral push rod (18) penetrates through, the top on the left side of dense medium cyclone (16) is communicated with a group of vertical dense medium suspension liquid inlets (17), the left side of the bottom of the dense medium cyclone (16) is communicated downwards with a gangue channel (20), the right side of the bottom is communicated downwards with a clean coal channel (22), the tail end of the gangue channel (20) is communicated with a gangue collecting box (21) fixedly placed on the ground, the bottom end of the clean coal channel (22) is communicated rightwards with a fine grinding box (24), the inside of the fine grinding box (24) is provided with a group of transverse grinding rollers (25) in a rolling mode, the right end of each grinding roller (25) penetrates through the side wall of the fine grinding box (24) and is connected with a rotating motor (28), the bottom of the fine grinding box (24) is provided with a filter hole (26), the lower side of the fine grinding box (24) is provided with a flocculant groove (27), and a flocculant.

2. An apparatus for recovering cleaned coal from gangue as claimed in claim 1, wherein control valves (23) are provided in both the cleaned coal passage (22) and the gangue passage (20).

3. An apparatus for recovering clean coal from coal and gangue as claimed in claim 2, in which the distance between the outer surface of the grinding roll (25) and the inner surface of the refiner box (24) is less than 0.5 mm.

4. A device for recovering clean coal from middlings and gangue according to claim 3, characterized in that the top of the blanking channel (15) is arranged as a grid-like structure.

5. An apparatus for recovering clean coal from middlings and gangue according to any of claims 1-4, characterized in that the top of the feed inlet (13) is provided with a set of coarse screens (14).