CN211838433U

CN211838433U - Novel coal slime dense medium sorting system

Info

Publication number: CN211838433U
Application number: CN202020359476.5U
Authority: CN
Inventors: 崔学奇; 张光伟; 葛家君; 孙伟; 王丽娟; 张星; 王治帅
Original assignee: Weihai Haiwang Hydrocyclone Co ltd
Current assignee: Weihai Haiwang Hydrocyclone Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-11-03
Anticipated expiration: 2030-03-20

Abstract

The utility model relates to the technical field of coal washing, in particular to a novel coal slime dense medium sorting system, the system consists of a primary feeding barrel, a primary feeding pump, a primary swirler, a gangue sorting group and a clean coal sorting group, the clean coal separation group consists of a clean coal magnetic separator, a clean coal mud laminated vibrating screen, a qualified concentrate medium barrel and a centrifugal dehydrator, the discharge of the clean coal centrifugal dehydrator is a clean coal product, the bottom flow port of the primary cyclone is communicated with a gangue separation group through a conveying pipe, the gangue separation group consists of a gangue magnetic separator, a gangue arc dewatering screen, a gangue high-frequency vibration dewatering screen and a concentrate qualified medium bucket, oversize products of the gangue high-frequency vibration dewatering screen are gangue products, and the gangue high-frequency vibration dewatering screen has the advantages of low investment cost, simplicity and convenience in operation, high automation degree, stable feeding amount, thorough separation, high separation efficiency and the like.

Description

Novel coal slime dense medium sorting system

Technical Field

The utility model belongs to the technical field of coal washing and selects technical field and specifically relates to a novel coal slime dense medium sorting system that input cost is low, easy and simple to handle, degree of automation is high, the pan feeding volume is stable, select separately thoroughly and sorting efficiency is high.

Background

As is well known, in recent years, with the mechanization of coal mining technology, the content of-1 mm fine particles in washed raw coal is greatly increased, the content of coal slime in the raw coal is more and more, the washing difficulty of each coal preparation plant is increased, the washing cost is increased, and the separation precision is reduced. How to effectively improve the sorting precision of the-1 mm fine fraction becomes a key problem for each design, research and production unit.

In the field of coal washing and selecting at present, a dense medium separation process is generally accepted as a washing and selecting process with the highest separation precision, for 0.5-50 mm size-fraction raw coal, the quantity efficiency of dense medium cyclones can reach more than 95%, but the dense medium cyclones still have self separation lower limits, according to experimental analysis and demonstration, when the size of the washed raw coal is less than 0.5mm, the separation precision of the dense medium cyclones is obviously reduced, along with the large-scale development of coal separation equipment, the separation lower limits of the dense medium cyclones can be further improved, for a flotation process, the optimal separation size range is 0-0.3 mm, if the selected size is more than 0.5mm, the separation precision of a flotation machine is greatly reduced, the flotation process cost is high, and the subsequent product dehydration link is complex.

Aiming at the separation process of coarse slime with the thickness of 0.2-1mm, the separation process is mainly applied at present: a coal slime dense medium cyclone separation process based on a main selective dense medium separation system. The separation process of the coal slime dense medium cyclone is introduced as follows: the coal slime dense medium cyclone separation process is that a part of qualified medium suspension is separated from qualified medium suspension under a clean coal medium removal arc screen of a main heavy medium separation system, a slurry pump is used for feeding the qualified medium suspension into the coal slime dense medium cyclone at high pressure for separation, an overflow product of the coal slime dense medium cyclone and the clean coal dilute medium suspension enter a clean coal magnetic separator together for medium recovery, concentrate of the clean coal magnetic separator returns to a qualified medium barrel, and tailings of the clean coal magnetic separator are mixed with comprehensive clean coal products after dehydration and desliming treatment; the underflow product of the coal slime dense medium cyclone and the middling coal or gangue dilute medium suspension liquid enter a middling coal or gangue magnetic separator together for medium recovery, clean coal of the middling coal or gangue magnetic separator returns to a qualified medium barrel, tailings of the middling coal or gangue magnetic separator are dehydrated and desliming treated, then middling coal or gangue products are mixed, and partial shunt in the qualified medium suspension liquid below a clean coal desliming arc screen of a main dense medium separation system is adopted as the main purpose of feeding of the coal slime dense medium cyclone: firstly, the coal slime amount in a main selective heavy medium system is reduced, and the fluidity of qualified media is ensured; and secondly, separating the coal slime to ensure the ash content index of the coal slime.

The main problems of the above system process are two: firstly, due to the constant change of the content of coal slime in raw coal, the fluctuation of the flow rate of qualified medium suspension liquid under the clean coal medium removal sieve bend is large, so that the feeding quantity of the coal slime heavy medium cyclone is unstable, the feeding pressure is suddenly high and suddenly low, the separation precision of the coal slime heavy medium cyclone is reduced, and an ideal separation index is difficult to obtain; and secondly, the process only sorts partial coal slime in the shunt of the qualified medium suspension liquid under the clean coal medium-removing arc-shaped screen, and the coal slime entering the clean coal dilute medium suspension liquid is not effectively sorted, so that the aim of controlling the ash content index of the clean coal is difficult to fundamentally realize.

Disclosure of Invention

The utility model aims at solving the not enough of above-mentioned prior art, provide a novel coal slime dense medium sorting system that input cost is low, easy and simple to handle, degree of automation is high, the pan feeding volume is stable, select separately thoroughly and sorting efficiency is high.

The utility model provides a technical scheme that its technical problem adopted is:

a novel coal slime dense medium separation system is characterized by comprising a primary feeding barrel, a primary feeding pump, a primary swirler, a gangue separation group and a clean coal separation group, wherein a discharge port of the primary feeding barrel is connected with an inlet of the primary feeding pump through a conveying pipe, an outlet of the primary feeding pump is connected with a feed inlet of the primary swirler through a conveying pipe, an overflow port of the primary swirler is connected with the clean coal separation group through a conveying pipe, the clean coal separation group comprises a clean coal magnetic separator, a clean coal slime stacking vibrating screen, a concentrate qualified medium barrel and a centrifugal dehydrator, a feeding port of the clean coal magnetic separator is communicated with the overflow port of the primary swirler through a conveying pipe, a magnetic separation outlet of the clean coal magnetic separator is communicated with the concentrate qualified medium barrel, and a magnetic separation tailing outlet of the clean coal magnetic separator is communicated with the feed inlet of the clean coal slime stacking vibrating screen, the oversize export of cleaned coal mud lamination shale shaker be linked together with cleaned coal centrifugal dehydrator, the ejection of compact of cleaned coal centrifugal dehydrator is the cleaned coal product promptly, and the centrifugal liquid export of cleaned coal centrifugal force and the undersize export of cleaned coal mud lamination shale shaker are linked together through conveyer pipe and flotation machine or concentrator, the underflow opening of one-level swirler be linked together through conveyer pipe and waste rock separation group, waste rock separation group constitute by waste rock magnetic separator, waste rock arc dewatering screen, waste rock high-frequency vibration dewatering screen, the qualified medium bucket of concentrate, the underflow opening of waste rock magnetic separator and the underflow opening of one-level swirler be linked together through the conveyer pipe, the magnetic separation export of waste rock magnetic separator is linked together with the qualified medium bucket of concentrate, the magnetic separation tailing export of waste rock magnetic separator is linked together through conveyer pipe and the feed inlet of waste rock arc dewatering screen, the oversize export of waste rock arc dewatering screen is linked together through conveyer pipe and the feed inlet of waste rock high-frequency vibration dewatering screen, and oversize products of the gangue high-frequency vibration dewatering screen are gangue products, and undersize product outlets of the gangue arc dewatering screen and the gangue high-frequency vibration dewatering screen are communicated with a flotation machine or a thickener through conveying pipes.

The utility model discloses a bottom stream mouth and the waste rock of one-level swirler between be equipped with middlings sorting group, second grade swirler, second grade delivery pump, second grade charging bucket, the bottom stream mouth of one-level swirler be linked together through the conveyer pipe with the feed inlet of second grade charging bucket, the discharge gate of second grade charging bucket is linked together through the import of conveyer pipe with the second grade delivery pump, the export of second grade delivery pump is linked together through the feed inlet of conveyer pipe with the second grade swirler, the bottom stream mouth of second grade swirler is linked together through conveyer pipe with waste rock sorting group, the overflow mouth of second grade swirler is linked together through conveyer pipe with middlings sorting group, middlings sorting group comprises middlings magnet separator, middlings arc dehydration sieve, middlings high-frequency vibration dehydration sieve, concentrate medium bucket, the bottom stream mouth of middlings magnet separator be linked together through the conveyer pipe, the magnetic separation export of middlings magnet separator is linked together with the qualified medium bucket, the magnetic separation tailing outlet of the middlings magnetic separator is communicated with the feed inlet of the middlings arc-shaped dewatering screen through a conveying pipe, the oversize outlet of the middlings arc-shaped dewatering screen is communicated with the feed inlet of the middlings high-frequency vibration dewatering screen through a conveying pipe, oversize products of the middlings high-frequency vibration dewatering screen are middlings products, and undersize outlets of the middlings arc-shaped dewatering screen and the middlings high-frequency vibration dewatering screen are communicated with a flotation machine or a thickener through conveying pipes.

Conveyer pipe between the feed inlet of one-level swirler and the discharge gate of one-level storage bucket on be equipped with one-level density sensor and one-level pressure sensor, carry out real-time detection to the pan feeding pressure and the pan feeding density of one-level swirler respectively.

The conveyer pipe between the discharge gate of feed inlet and second grade charging bucket of second grade swirler on be equipped with second grade density sensor and second grade pressure sensor, carry out real-time detection to the pan feeding pressure and the pan feeding density of second grade swirler respectively.

One-level pan feeding bucket in be equipped with liquid level detection device, one-level pan feeding bucket top sets up clean water pipe and qualified medium pipe to adjust liquid level and density at any time.

Second grade pan feeding bucket in be equipped with liquid level detection device, second grade pan feeding bucket top sets up clean water pipe and qualified medium pipe to adjust liquid level and density at any time.

The utility model discloses because this system is selected separately the group by one-level charging bucket, one-level feeding pump, one-level swirler, waste rock separation group, clean coal and is constituteed, one-level charging bucket's discharge gate be connected through conveyer pipe and one-level feeding pump import, the export of one-level feeding pump is connected through the feed inlet of conveyer pipe with one-level swirler, one-level swirler's overflow mouth be connected with clean coal separation group through the conveyer pipe, clean coal separation group constitute by clean coal magnet separator, clean coal slime lamination shale shaker, the qualified medium bucket of concentrate, centrifugal dehydrator, one-level swirler's underflow opening and waste rock separation group between be equipped with well coal separation group, second grade swirler, second grade conveyer pump, second grade charging bucket, well coal separation group comprises well coal magnet separator, well coal arc screen, well coal high-frequency vibration dewatering screen, the qualified medium bucket, the conveyer pipe between the feed inlet of one-level swirler and the discharge gate of one-level charging bucket on be equipped with one-level density sensor and a one-level cyclone on The level pressure sensor is used for detecting the feeding pressure and the feeding density of the level cyclone in real time respectively, the conveying pipe between the feeding port of the level cyclone and the discharging port of the level feeding barrel is provided with the level density sensor and the level pressure sensor, the feeding pressure and the feeding density of the level cyclone are detected in real time respectively, the level feeding barrel is internally provided with a liquid level detection device, a clear water pipe and a qualified medium pipe are arranged above the level feeding barrel to adjust the liquid level and the density at any time, the level detection device is arranged in the level feeding barrel, the clear water pipe and the qualified medium pipe are arranged above the level feeding barrel to adjust the liquid level and the density at any time, and the liquid level detection device has the advantages of low input cost, simplicity and convenience in operation, high automation degree, stable feeding amount, thorough sorting, high sorting efficiency and the like.

Drawings

Figure 1 is the utility model discloses well two product coal slime dense medium sorting system.

Figure 2 is the utility model discloses well three product coal slime dense medium sorting system.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in the attached drawings, figure 1 is two products coal slime dense medium separation system of waste rock product and clean coal product, this system is selected separately by one-level charging bucket 1, one-level charging pump 2, one-level swirler 3, waste rock separation group, clean coal and is constituteed, the discharge gate of one-level charging bucket 1 be connected with the import of one-level charging pump 2 through the conveyer pipe, the export of one-level charging pump 2 is connected with the feed inlet of one-level swirler 3 through the conveyer pipe, the overflow mouth of one-level swirler 3 be connected with clean coal separation group through the conveyer pipe, clean coal separation group by clean coal magnet separator 4, clean coal slime lamination shale shaker 5, the qualified medium bucket of concentrate, centrifugal dehydrator 6 constitute, the pan feeding mouth of clean coal magnet separator 4 be linked together through the conveyer pipe with the overflow mouth of one-level swirler 3, the magnetic separation export of clean coal magnet separator 4 be linked together with the qualified medium bucket of concentrate, the magnetic separation tailing outlet of the clean coal magnetic separator 4 is communicated with the feed inlet of the clean coal mud laminated vibrating screen 5, the oversize outlet of the clean coal mud laminated vibrating screen 5 is communicated with the clean coal centrifugal dehydrator 6, the discharge of the clean coal centrifugal dehydrator 6 is a clean coal product, the centrifugal liquid outlet of the clean coal centrifugal force and the undersize outlet of the clean coal mud laminated vibrating screen 5 are communicated with the flotation machine or the concentrator through the delivery pipes, the bottom flow port of the primary swirler 3 is communicated with the gangue separation group through the delivery pipes, the gangue separation group is composed of a gangue magnetic separator 7, a gangue arc dehydration screen 8, a gangue high-frequency vibration dehydration screen 9 and a qualified medium barrel, the feed inlet of the gangue magnetic separator 7 is communicated with the bottom flow port of the primary swirler 3 through the delivery pipes, the magnetic separation outlet of the gangue magnetic separator 7 is communicated with the qualified medium barrel of the concentrate, the magnetic separation tailing outlet of the gangue magnetic separator 7 is communicated with the feed inlet of the gangue arc dehydration screen 8 through the delivery pipes, the oversize outlet of the gangue arc dewatering screen 8 is communicated with the feed inlet of the gangue high-frequency vibration dewatering screen 9 through a conveying pipe, oversize products of the gangue high-frequency vibration dewatering screen 9 are gangue products, the gangue arc dewatering screen 8 and the undersize outlet of the gangue high-frequency vibration dewatering screen 9 are communicated with a flotation machine or a thickener through conveying pipes, a primary density sensor 10 and a primary pressure sensor 11 are arranged on the conveying pipe between the feed inlet of a primary swirler 3 and the discharge outlet of a primary charging bucket 1 and respectively detect the charging pressure and the charging density of the primary swirler 3 in real time, a liquid level detection device is arranged in the primary charging bucket 1, a clean water pipe and a medium pipe are arranged above the primary charging bucket 1 to adjust the qualified liquid level and the qualified density at any time, the qualified medium in the qualified medium pipe adopts the concentrate products of a clean coal magnetic separator 4, and electric valves are arranged on the clean water pipe and the qualified medium pipe, in order to reach the purpose of in good time adjusting 1 liquid level of one-level storage bucket and sorting density, its flow is: a primary feeding barrel 1 is adopted to convey materials to a primary swirler 3 for sorting at a certain pressure through a primary feeding pump 2, the feeding density and the feeding pressure are respectively detected in real time by a density sensor and a pressure sensor, an overflow product of the primary swirler 3 enters a clean coal magnetic separator 4 for medium recovery, magnetically-separated concentrate (namely qualified medium) enters a concentrate qualified medium barrel of a main sorting system, magnetically-separated tailings enter a clean coal slime laminated vibrating screen for dehydration and desliming treatment, undersize of the clean coal slime laminated vibrating screen enters a flotation machine or a thickener, oversize dehydrated objects enter a clean coal centrifugal dehydrator 6 for final moisture control, so that a clean coal product is obtained, and a centrifugal liquid enters the flotation machine or the thickener; the underflow product of the coal slime dense medium cyclone enters a gangue magnetic separator 7 for medium recovery, magnetically-separated concentrate (namely qualified medium) enters a qualified concentrate medium barrel of a main separation system, magnetically-separated tailings enter a gangue arc dewatering screen 8 for dewatering and desliming, undersize of the gangue arc dewatering screen 8 enters a flotation machine or a thickener, oversize dewatered enters a gangue high-frequency vibration dewatering screen 9 for secondary dewatering and desliming, undersize of the high-frequency vibration dewatering screen enters the flotation machine or the thickener, and gangue products are obtained on the screens.

FIG. 2 is three products coal slime dense medium separation system of waste rock product, middlings product and clean coal product, and this system is selected separately the group by one-level charging barrel 1, one-level charging pump 2, one-level swirler 3, waste rock separation group, clean coal and is constituteed, the discharge gate of one-level charging barrel 1 be connected with the import of one-level charging pump 2 through the conveyer pipe, the export of one-level charging pump 2 is connected through the feed inlet of conveyer pipe with one-level swirler 3, the overflow mouth of one-level swirler 3 be connected with clean coal separation group through the conveyer pipe, clean coal separation group by clean coal magnet separator 4, clean coal slime lamination shale shaker 5, the qualified medium bucket of concentrate, centrifugal dehydrator 6 constitute, the pan feeding mouth of clean coal magnet separator 4 be linked together through the conveyer pipe with the overflow mouth of one-level swirler 3, the magnetic separation export of clean coal magnet separator 4 be linked together with the qualified medium bucket of concentrate, the magnetic separation tailing outlet of the clean coal magnetic separator 4 is communicated with the feed inlet of the clean coal mud laminated vibrating screen 5, the oversize outlet of the clean coal mud laminated vibrating screen 5 is communicated with the clean coal centrifugal dehydrator 6, the discharge of the clean coal centrifugal dehydrator 6 is a clean coal product, the centrifugal liquid outlet of the clean coal centrifugal force and the undersize outlet of the clean coal mud laminated vibrating screen 5 are communicated with the flotation machine or the concentrator through the delivery pipes, the bottom flow port of the primary swirler 3 is communicated with the gangue separation group through the delivery pipes, the gangue separation group is composed of a gangue magnetic separator 7, a gangue arc dehydration screen 8, a gangue high-frequency vibration dehydration screen 9 and a qualified medium barrel, the feed inlet of the gangue magnetic separator 7 is communicated with the bottom flow port of the primary swirler 3 through the delivery pipes, the magnetic separation outlet of the gangue magnetic separator 7 is communicated with the qualified medium barrel of the concentrate, the magnetic separation tailing outlet of the gangue magnetic separator 7 is communicated with the feed inlet of the gangue arc dehydration screen 8 through the delivery pipes, the oversize outlet of the gangue arc dewatering screen 8 is communicated with the feed inlet of the gangue high-frequency vibration dewatering screen 9 through a conveying pipe, oversize products of the gangue high-frequency vibration dewatering screen 9 are gangue products, the gangue arc dewatering screen 8 and the undersize outlet of the gangue high-frequency vibration dewatering screen 9 are communicated with a flotation machine or a thickener through conveying pipes, a primary density sensor 10 and a primary pressure sensor 11 are arranged on the conveying pipe between the feed inlet of the primary cyclone 3 and the discharge outlet of the primary charging bucket 1 to respectively detect the charging pressure and the charging density of the primary cyclone 3 in real time, a liquid level detection device is arranged in the primary charging bucket 1, a clean water pipe and a medium pipe are arranged above the primary charging bucket 1 to adjust the qualified liquid level and density at any time, a middling coal sorting group, a secondary cyclone 12 and a secondary cyclone 12 are arranged between the underflow outlet of the primary cyclone 3 and the gangue sorting group, A secondary delivery pump 13 and a secondary feeding barrel 14, wherein the bottom flow port of the primary cyclone 3 is communicated with the feeding port of the secondary feeding barrel 14 through a delivery pipe, the discharge port of the secondary feeding barrel 14 is communicated with the inlet of the secondary delivery pump 13 through a delivery pipe, the outlet of the secondary delivery pump 13 is communicated with the feeding port of the secondary cyclone 12 through a delivery pipe, the bottom flow port of the secondary cyclone 12 is communicated with the gangue separation group through a delivery pipe, the overflow port of the secondary cyclone 12 is communicated with the middlings separation group through a delivery pipe, the middlings separation group is composed of a middlings magnetic separator 15, a middlings arc dehydration sieve 16, a middlings high-frequency vibration dehydration sieve 17 and a concentrate qualified medium barrel, the feeding port of the middlings magnetic separator 15 is communicated with the bottom flow port of the cyclone through a delivery pipe, the magnetic separation outlet of the middlings magnetic separator 15 is communicated with the concentrate qualified medium barrel, the magnetic separation tailings outlet of the middlings magnetic separator 15 is communicated with the feeding port of the middlings arc, the oversize outlet of the middling arc dewatering screen 16 is communicated with the feed inlet of the middling high-frequency vibration dewatering screen 17 through a conveying pipe, oversize products of the middling high-frequency vibration dewatering screen 17 are middling products, the undersize outlets of the middling arc dewatering screen 16 and the middling high-frequency vibration dewatering screen 17 are communicated with a flotation machine or a thickener through conveying pipes, a secondary density sensor 18 and a secondary pressure sensor 19 are arranged on the conveying pipe between the feed inlet of the secondary cyclone 12 and the discharge outlet of the secondary feeding barrel 14 and respectively detect the feeding pressure and the feeding density of the secondary cyclone 12 in real time, a liquid level detection device is arranged in the secondary feeding barrel 14, a clean water pipe and a qualified medium pipe are arranged above the secondary feeding barrel 14 to adjust the liquid level and the density at any time, qualified media in the qualified medium pipe adopt concentrate products of a clean coal separator 4, and electric valves are arranged on the clean water pipe and the qualified medium pipe, in order to reach the purpose of in good time adjusting pan feeding bucket liquid level and sorting density, its flow is: the primary feeding barrel 1 conveys materials to a primary swirler 3 for sorting under certain pressure through a primary feeding pump 2, the feeding density and the feeding pressure are respectively detected in real time by adopting a density sensor and a pressure sensor, an overflow product of the primary swirler 3 enters a clean coal magnetic separator 4 for medium recovery, magnetically-separated concentrate (namely qualified medium) enters a concentrate qualified medium barrel of a main sorting system, magnetically-separated tailings enter a clean coal slime laminated vibrating screen for dehydration and desliming treatment, undersize of the clean coal slime laminated vibrating screen enters a flotation machine or a thickener, oversize dehydrated substances enter a clean coal centrifugal dehydrator 6 for final moisture control, so that a clean coal product is obtained, and a centrifugal liquid enters the flotation machine or the thickener; the underflow product of the primary cyclone 3 enters a secondary feeding barrel 14, a liquid level detection device is arranged in the secondary feeding barrel 14, a clear water pipe and a qualified medium pipe are arranged above the secondary feeding barrel 14 to adjust the liquid level and the density at any time, a secondary feeding pump is adopted to convey the material in the secondary feeding barrel 14 to a secondary cyclone 12 for secondary separation at a certain pressure, the feeding density and the feeding pressure are respectively detected in real time by a density sensor and a pressure sensor, the overflow product of the secondary cyclone 12 enters a middlings magnetic separator 15 for medium recovery, the magnetically separated concentrate (namely the qualified medium) enters a qualified medium barrel of the concentrate of a main separation system, the magnetically separated tailings enter a middlings arc dewatering screen 16 for dehydration and desliming treatment, the undersize product of the middlings arc dewatering screen 16 enters a flotation machine or a thickener, and the oversize dewatered product enters a middlings high-frequency vibration screen 17 for secondary dehydration, Desliming, namely, feeding undersize of the medium coal high-frequency vibration dewatering screen 17 into a flotation machine or a thickener, and screening to obtain a medium coal product; the underflow product of the secondary cyclone 12 enters a gangue magnetic separator 7 for medium recovery, magnetically separated concentrate (namely qualified medium) enters a qualified concentrate medium barrel of a main separation system, magnetically separated tailings enter a gangue arc dewatering screen 8 for dehydration and desliming, undersize of the gangue arc dewatering screen 8 enters a flotation machine or a thickener, oversize dewatered products enter a gangue high-frequency vibration dewatering screen 9 for secondary dehydration and desliming, undersize of the high-frequency vibration dewatering screen enters the flotation machine or the thickener, and gangue products are obtained on the screens.

The overflow product of the primary cyclone 3 enters a clean coal magnetic separator 4, the magnetic separator concentrate product (namely qualified medium) returns to a main-separation concentrate qualified medium barrel, the magnetic separation tailing product adopts a novel clean coal slurry laminated vibrating fine screen to carry out high-efficiency grading treatment, high-ash fine mud doped in the magnetic separation tailing product can be effectively removed, the ash content index of the clean coal product is guaranteed to the maximum extent, the oversize product of the laminated vibrating fine screen is subjected to final moisture control by adopting a coal slurry centrifugal dehydrator 6, the product moisture index is guaranteed, the system can adjust the feed density, the feed pressure, the caliber and the insertion depth of the overflow pipe, the caliber of a underflow opening, the sieve seam specification of the clean coal laminated vibrating fine screen and other influencing factors in real time, and the grading index is adjusted to achieve the purpose of controlling and adjusting the product index. The system comprises a two-product coal slurry dense medium sorting system and a three-product coal slurry dense medium sorting system, and can select the heavy medium of the coal slurry according to the coal quality condition and the user requirement, the process structure is set, the flexible adjustment of the product structure is realized, the shunting of qualified medium suspension liquid under a main-selection clean coal medium removal arc-shaped sieve and the effective separation treatment of coal slime in clean coal dilute medium suspension liquid are realized by adopting a primary cyclone 3 and a secondary cyclone 12, the problems of unstable feeding amount, incomplete separation, low separation efficiency and the like existing in the separation process of the traditional coal slime dense medium cyclone are thoroughly solved, the primary feeding pump 2 or the secondary conveying pump 13 is provided with a frequency converter, the device is used for conveying materials in the feeding barrel to the coal slime dense medium cyclone under a certain pressure condition for effective separation, and has the advantages of low investment cost, simplicity and convenience in operation, high automation degree, stable feeding amount, thorough separation, high separation efficiency and the like.

Claims

1. A novel coal slime dense medium separation system is characterized by comprising a primary feeding barrel, a primary feeding pump, a primary swirler, a gangue separation group and a clean coal separation group, wherein a discharge port of the primary feeding barrel is connected with an inlet of the primary feeding pump through a conveying pipe, an outlet of the primary feeding pump is connected with a feed inlet of the primary swirler through a conveying pipe, an overflow port of the primary swirler is connected with the clean coal separation group through a conveying pipe, the clean coal separation group comprises a clean coal magnetic separator, a clean coal slime stacking vibrating screen, a concentrate qualified medium barrel and a centrifugal dehydrator, a feeding port of the clean coal magnetic separator is communicated with the overflow port of the primary swirler through a conveying pipe, a magnetic separation outlet of the clean coal magnetic separator is communicated with the concentrate qualified medium barrel, and a magnetic separation tailing outlet of the clean coal magnetic separator is communicated with the feed inlet of the clean coal slime stacking vibrating screen, the oversize export of cleaned coal mud lamination shale shaker be linked together with cleaned coal centrifugal dehydrator, the ejection of compact of cleaned coal centrifugal dehydrator is the cleaned coal product promptly, and the centrifugal liquid export of cleaned coal centrifugal force and the undersize export of cleaned coal mud lamination shale shaker are linked together through conveyer pipe and flotation machine or concentrator, the underflow opening of one-level swirler be linked together through conveyer pipe and waste rock separation group, waste rock separation group constitute by waste rock magnetic separator, waste rock arc dewatering screen, waste rock high-frequency vibration dewatering screen, the qualified medium bucket of concentrate, the underflow opening of waste rock magnetic separator and the underflow opening of one-level swirler be linked together through the conveyer pipe, the magnetic separation export of waste rock magnetic separator is linked together with the qualified medium bucket of concentrate, the magnetic separation tailing export of waste rock magnetic separator is linked together through conveyer pipe and the feed inlet of waste rock arc dewatering screen, the oversize export of waste rock arc dewatering screen is linked together through conveyer pipe and the feed inlet of waste rock high-frequency vibration dewatering screen, and oversize products of the gangue high-frequency vibration dewatering screen are gangue products, and undersize product outlets of the gangue arc dewatering screen and the gangue high-frequency vibration dewatering screen are communicated with a flotation machine or a thickener through conveying pipes.

2. The system of claim 1, wherein a middling coal separation group, a secondary cyclone, a secondary delivery pump, and a secondary feeding barrel are disposed between the underflow port of the primary cyclone and the gangue separation group, the underflow port of the primary cyclone is connected to the feed inlet of the secondary feeding barrel through a delivery pipe, the discharge outlet of the secondary feeding barrel is connected to the inlet of the secondary delivery pump through a delivery pipe, the outlet of the secondary delivery pump is connected to the feed inlet of the secondary cyclone through a delivery pipe, the underflow port of the secondary cyclone is connected to the gangue separation group through a delivery pipe, the overflow port of the secondary cyclone is connected to the middling coal separation group through a delivery pipe, the middling coal separation group is composed of a middling coal magnetic separator, a middling coal arc dewatering screen, a middling coal high-frequency vibration dewatering screen, and a concentrate qualified medium barrel, the feed port of the middling coal magnetic separator is connected to the underflow port of the cyclone through a delivery pipe, the magnetic separation outlet of the middlings magnetic separator is communicated with the qualified concentrate medium barrel, the magnetic separation tailing outlet of the middlings magnetic separator is communicated with the feed inlet of the middlings arc-shaped dewatering screen through a conveying pipe, the oversize outlet of the middlings arc-shaped dewatering screen is communicated with the feed inlet of the middlings high-frequency vibration dewatering screen through a conveying pipe, oversize of the middlings high-frequency vibration dewatering screen is a middlings product, and undersize outlets of the middlings arc-shaped dewatering screen and the middlings high-frequency vibration dewatering screen are communicated with a flotation machine or a thickener through conveying pipes.

3. The system of claim 1, wherein a primary density sensor and a primary pressure sensor are disposed on the transport pipe between the inlet of the primary cyclone and the outlet of the primary feeding barrel, for real-time detection of the feeding pressure and the feeding density of the primary cyclone.

4. The system of claim 2, wherein a second-stage density sensor and a second-stage pressure sensor are disposed on the delivery pipe between the inlet of the second-stage cyclone and the outlet of the second-stage feeding barrel, and are used for detecting the feeding pressure and the feeding density of the second-stage cyclone in real time.

5. The novel coal slime dense medium separation system as claimed in claim 1, wherein a liquid level detection device is arranged in the primary feeding barrel, and a clean water pipe and a qualified medium pipe are arranged above the primary feeding barrel.

6. The novel coal slime dense medium separation system as claimed in claim 2, wherein a liquid level detection device is arranged in the second-stage feeding barrel, and a clean water pipe and a qualified medium pipe are arranged above the second-stage feeding barrel.