CN101850293A - Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed - Google Patents

Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed Download PDF

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Publication number
CN101850293A
CN101850293A CN 201010161063 CN201010161063A CN101850293A CN 101850293 A CN101850293 A CN 101850293A CN 201010161063 CN201010161063 CN 201010161063 CN 201010161063 A CN201010161063 A CN 201010161063A CN 101850293 A CN101850293 A CN 101850293A
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desliming
overflow
feed
sorting
barrel body
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CN101850293B (en
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李延锋
刘炯天
徐世辉
陈文刊
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

The invention relates to a coarse coal slime sorting and grading plant for a desliming type liquid-solid fluid bed, which comprises a sorting and grading barrel body and a liquid distributor, wherein the sorting and grading barrel body is composed of an upper barrel body, a lower barrel body and a base cone; the liquid distributor is arranged on the upper part of the base cone; a clean coal overflow trough is arranged on the upper part of the upper barrel; and the inner part of the upper barrel is provided with a feed sleeve and a feed hopper communicated with the feed sleeve.. The invention is characterized in that a clean coal overflow desliming collecting tank is arranged outside the clean coal overflow trough; a feed desliming device is arranged on the feed hopper; the clean coal overflow desliming collecting tank is provided with a feed and overflow desliming mixed discharge port; the feed and overflow desliming mixed discharge port is provided with a desliming pipe which is connected with the overflow port of the feed desliming device; a densimeter and an underflow regulator, which are connected with a density controller, are arranged in the sorting and grading barrel body; and the discharge port of the clean coal overflow trough is provided with a clean coal discharge valve for controlling the desliming quantity. High-ash fine-slime materials in the fed material can be directly discharged from the overflow, thereby reducing the influence of fine slime on the sorting effect, reducing high-ash fine-slime pollution in the overflow of the coarse coal slime sorter for liquid-solid fluid beds, and enhancing the sorting effect.

Description

The liquid-solid fluid bed separation of coarse slime grading plant of desliming type
Technical field
The present invention relates to a kind of slime separation classification technique, the liquid-solid fluid bed separation of coarse slime grading plant of especially a kind of desliming type.
Background technology
Most of coal preparation techniques adopt stepless gravity treatment and flotation process combined, take off not desliming before no matter being selected in, the sorting granularity boundary of gravity treatment and flotation is 0.5mm, in fact the characteristics owing to two kinds of method for separating itself make that near the coal grain separating effect 0.5mm is relatively poor, and this part coal grain (referring generally to 3-0.25mm) GB (GB/T 7186-1998) is defined as coarse slime.And this part particle generally reclaims separately by the high frequency sieve in coal preparation plant, and its ash content is between cleaned coal and middle coal, and generally than the high 2-5% of cleans ash, the final whereabouts of its product is difficult to determine.Generally not to its sorting, majority mixes cleaned coal with its part at present, and its prerequisite is that gravity treatment and floatation clean coal ash content must be lower than the final sales cleans ash, i.e. gravity treatment and flotation back of the body coarse slime ash content, and another part mixes middle coal.Demand along with development of times and society, current coal market requires more and more stricter to the ash content of coal product, there is minority coal preparation plant to adopt heavily be situated between cyclone or spiral of minor diameter that coarse slime is carried out sorting in recent years, but because the deficiency of these two kinds of devices itself can't reach satisfied effect.Heavily the be situated between deficiency of cyclone of minor diameter: 1. too thin to the medium granularity requirements, medium preparation and reclaim difficulty, and cost height; 2. pan feeding is required the pressure height, equipment attrition is serious, and power consumption is big; Though 3. its sorting granularity lower limit is lower, thinner stock grading efficient is low, and a part does not enter cleaned coal through the fine coal slurry of sorting, influences cleans ash, and it can not replace flotation fully simultaneously.The deficiency of spiral: 1. separating density height, cleaned coal can not reach the cleans ash of final requirement, and its product can not be sold as final products; 2. the separate unit treating capacity is little, needs many and is used, and floor space is big, and is highly big, needs simultaneously to size mixing and distributor, and distributing uniformity is difficult to control; 3. to the strictness of pan feeding concentration requirement, be difficult to control on the industrial production.
Fluidization technology on the chemical industry is incorporated into Concentrating Field, has obtained good effect.Patent ZL 200720037745.0 disclosed liquid-solid fluid bed separation of coarse slime graders provide a kind of liquid-solid fluid bed separation of coarse slime device that utilizes coarse slime self can reduce the coarse slime ash content again as medium.Main this relation relevant with the density of particle of sinking speed makes material carry out sorting in the fluidizing agent of self forming when utilizing narrow grade material to be interfered sedimentation.But because the characteristics of liquid-solid fluid bed separation of coarse slime machine grading principle, cause in the pan feeding the thin mud of high ash seriously polluted to cleaned coal, adopt desliming devices such as comprising cyclone, high frequency sieve and coal slime centrifuge even before pan feeding, adopt desliming of classification eddy flow and choosing back, still there is the thin mud of the high ash of a part in the final cleaned coal, influences separating effect.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point that exists in the prior art, provide a kind of desliming type liquid-solid fluid bed separation of coarse slime grading plant, coarse slime supplied materials pre-classification is concentrated, and carry out the sedimentation desliming in liquid-solid fluid bed separation of coarse slime machine overflow outlet, the thin dirt of high ash that reduces in the overflow of liquid-solid fluid bed separation of coarse slime machine is dyed, thus realize improving total cleaned coal productive rate, reduce total cleans ash, improve the quality of products and the coal resources comprehensive utilization ratio.
Technical scheme: the liquid-solid fluid bed separation of coarse slime grading plant of desliming type of the present invention, comprise by upper barrel body, lower barrel body, the sorting classifying staving that base cone constitutes, be located at the liquid distribution trough of base cone top, the top of upper barrel body is provided with the cleaned coal overflow launder, inside is provided with the pan feeding sleeve, the feed hopper that is connected with the pan feeding sleeve, be provided with cleaned coal overflow desliming feeder in the outside of described cleaned coal overflow launder, feed hopper is provided with feed desliming device, cleaned coal overflow desliming feeder is provided with pan feeding and overflow desliming mixing discharge gate, and pan feeding is provided with the desliming pipe that is connected with feed desliming device overfall with overflow desliming mixing discharge gate; Be provided with the densitometer and the underflow adjusting device that link to each other with density controller in the sorting classifying staving, the exit of described cleaned coal overflow launder is provided with the cleaned coal blow-off valve of control desliming amount.
Described underflow adjusting device comprises motorized adjustment executing agency, wedge shape mine tailing valve, is connected with connecting rod between motorized adjustment executing agency and the wedge shape mine tailing valve, and connecting rod is provided with the distance adjustment pipe; Described base cone outlet side is provided with the bypass pipe by the control of ore drawing valve; Described feed desliming device is feed cyclowass or desliming bucket.
Beneficial effect:
1, can make the thin mud material of high ash in the pan feeding directly discharge and do not enter separation system, reduce of the influence of thin mud, the effect that play buffering supplied materials, even feeding, tentatively reduces the coarse slime ash content, improves pan feeding concentration and disposal ability separating effect from overflow.
2, the thin dirt of high ash that has further reduced in the overflow of liquid-solid fluid bed separation of coarse slime machine is dyed, and simplified the follow-up desliming dewatering process of sorting, reduce choosing back cleans ash, reduce the thin mud of high ash to the pollution of cleaned coal, improve separating effect.
3, adopt density controller can realize that bed density or separating density are even substantially, realize regulating automatically, improving sharpness of separation; The underflow valve of pan feeding sedimentation sloughing-off tank and cleaned coal overflow sedimentation sloughing-off tank also can be realized automatic control simultaneously, improves the desliming effect.
4. can realize high accuracy sorting under the low-density, cleans ash is dyed still less by thin dirt, and cleans ash can be lower, and the pan feeding ash content is 25% when following, after the sorting cleans ash and gravity treatment and floatation clean coal ash content quite or lower, clean coal yield is higher.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a feed cyclowass structural representation of the present invention.
Fig. 3 is a desliming bucket structure schematic diagram of the present invention.
Fig. 4 is a fluid distributor structural representation of the present invention.
Among the figure: 1-feed cyclowass or desliming bucket, 2-feed hopper, 3-pan feeding scalping plate, 4-cleaned coal overflow desliming feeder, 5-cleaned coal overflow launder, 6-connecting rod, 7-underflow adjusting device, 8-pan feeding sleeve, 9-rectangle cleaned coal overflow launder, 10-density controller, 11-densitometer, 12-upper barrel body, the 13-flange, 14-lower barrel body, 15-fluid distributor, the 16-base cone, 17-mine tailing valve, 18-ore drawing valve, 19-cleaned coal blow-off valve, 20-pan feeding and overflow desliming mixing discharge gate, 21-desliming pipe.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
Shown in Figure 1, separation of coarse slime grading plant of the present invention mainly is made of sorting classifying staving, feeding device, feed desliming device 1, overflow desliming device, density controller 10, underflow adjusting device and fluid distributor 15.The sorting classifying staving is made of upper barrel body 12, lower barrel body 14, base cone 16, and upper barrel body 12 and lower barrel body 14 are connected as a single entity by flange 13.Feeding device is made of pan feeding sleeve 8 and the feed hopper 2 that pan feeding scalping plate 3 is installed; The top outer race of upper barrel body 12 is equipped with cleaned coal overflow launder 5, the tilting coniform annular groove in bottom that cleaned coal overflow launder 5 is big up and small down, and the exit of cleaned coal overflow launder 5 is provided with the cleaned coal blow-off valve 19 of control desliming amount.Central upper is provided with pan feeding sleeve 8 in the upper barrel body 12, the outer cover of cleaned coal overflow launder 5 is equipped with cleaned coal overflow desliming feeder 4, be set with the tilting rectangle concentrate overflow launder 9 that communicates with concentrate overflow desliming feeder 4 in bottom at upper barrel body 12 tops, can increase the area of downflow weir, improve cleaned coal and overflow speed.The feed hopper 2 that is connected with pan feeding sleeve 8 is set on the cleaned coal overflow desliming feeder 4, and the side of pan feeding sleeve 8 is provided with the feeding pipe that is 90 ° of bendings that connects with feed hopper 2 flanges.Feed hopper 2 is provided with feed desliming device 1, feed desliming device 1 can adopt the feed cyclowass of pressure, also can adopt and not have the desliming bucket of pressing, the feed cyclowass mainly is made of feed pipe, underflow pipe and the overfall that links to each other with desliming pipe 21, its underflow pipe inserts in the feed hopper 2, and is shown in Figure 2; The overflow tube seat formation that the desliming bucket mainly contains feed pipe, desliming bucket underflow valve, underflow pipe and links to each other with desliming pipe 21, shown in Figure 3.The bottom sides of cleaned coal overflow desliming feeder 4 is provided with pan feeding and overflow desliming mixing discharge gate 20, and pan feeding is provided with the desliming pipe 21 that is connected with feed desliming device 1 overfall with overflow desliming mixing discharge gate 20; Be provided with the densitometer 11 and the underflow adjusting device 7 that link to each other with density controller 10 in the sorting classifying staving, underflow adjusting device 7 comprises motorized adjustment executing agency, wedge shape mine tailing valve 17, be connected with connecting rod 6 between motorized adjustment executing agency and the wedge shape mine tailing valve 17, connecting rod 6 is provided with the distance adjustment pipe.Be provided with the fluid distributor 15 that communicates with outer connecting pipe in the lower barrel body 14, fluid distributor 15 adopts the multitube distributor of annular, shown in Fig. 4 (a), or the rectangle multitube distributor of lateral flow type, shown in Fig. 4 (b); Fluid distributor 15 bottoms are provided with the base cone 16 that connects lower barrel body 14, wedge shape mine tailing valve 17 valve bodies are taper, be located at base cone 16 exits, with the discharging opening of base cone 16 wedging mutually, by realize the switching of wedge shape mine tailing valves 17 by the motorized adjustment executing agency pulling connecting rod 6 of density controller 10 controls; Base cone 16 outlet sides are provided with the bypass pipe 18 by the control of ore drawing valve, so that the cleaning of mine tailing.
The course of work: when feed had certain steady pressure, feed desliming device 1 adopted the feed cyclowass, otherwise adopted the desliming bucket of sedimentation.Material is first-selected through feed desliming device 1, because the effect of hindered falling (aperture of the underflow valve bottom control sedimentation desliming bucket) or feed cyclowass centrifugal cyclone, impel the most of water in thin mud material of those high ashes and the feed slowly to rise to the top of settlement funnel or the overflow of cyclowass, the desliming that realizes material concentrates, coarse granule drops to the bottom, evenly enter in the pan feeding sleeve 8 along tangent line through feed pipe by feed hopper 2 with 90 ° of elbows, move downward to giving the charging basket bottom by gravity, enter in the liquid-solid fluid bed separation classification staving.After entering into material in the sorting classifying staving and progressively moving downward certain distance, material begins to separate by the height of density, low-density moves upward and enters cleaned coal overflow launder 5 by peripheral overflow weir or rectangle cleaned coal overflow launder 9, owing to be installed in the discharge rate size of the cleaned coal blow-off valve 19 control cleaned coal of cleaned coal overflow launder 5 bottoms, by the character of cleaned coal overflow launder 5 is up big and down small coniform, the thin mud of liquid-solid fluid bed separation of coarse slime classification overflow and most of water enter into cleaned coal overflow desliming feeder 4 through the peripheral overflow weir on cleaned coal overflow launder 5 tops, the desliming and the inspissation of liquid-solid fluid bed separation of coarse slime classifier overflow have been realized, the discharge pipe of cleaned coal overflow desliming feeder 4 bottoms communicates with the overflow pipe 21 of feed desliming device, compiles the back and enters other operation as the thin mud of deviating from.The product that cleaned coal blow-off valve 19 control cleaned coal through being positioned at cleaned coal overflow launder 5 bottoms are discharged is as qualified head coal product.The higher density material continues to move downward the fluid bed bed, the material that density is higher than fluid bed bed density passes bed and enters into the bottom, automatically mine tailing valve 17 discharges of controlling by underflow become mine tailing, and the material of intermediate density in fluidized-bed layer through moving back and forth up and down, after after a while, progressively realize separating.The formation of fluidized-bed layer is to be medium with the middle-high density material in the pan feeding, to pass through the ascending water of coming in the fluid distributor 15 is fluid, form the fluid bed bed, and ascending water is to utilize pump to enter in the cylinder through water-main 15-2, branching pipe 15-3, water distribution allotment pipe 15-4 and distributor pipe cap 15-5 along continuous straight runs from water inlet control valve 15-1,15-6, becomes upwelling upwards again.The control of whole assorting room is to realize regulating automatically and cleans ash control by the automatic control system of being made up of density sensor 11, density controller 10 and mine tailing valve 17.

Claims (4)

1. liquid-solid fluid bed separation of coarse slime grading plant of desliming type, comprise by upper barrel body (12), lower barrel body (14), the sorting classifying staving that base cone (16) constitutes, be located at the liquid distribution trough (15) of base cone (16) top, the top of upper barrel body (12) is provided with cleaned coal overflow launder (5), inside is provided with pan feeding sleeve (8), the feed hopper (2) that is connected with pan feeding sleeve (8), it is characterized in that: be provided with cleaned coal overflow desliming feeder (4) in the outside of described cleaned coal overflow launder (5), feed hopper (2) is provided with feed desliming device (1), cleaned coal overflow desliming feeder (4) is provided with pan feeding and overflow desliming mixing discharge gate (20), and pan feeding is provided with the desliming pipe (21) that is connected with feed desliming device (1) overfall with overflow desliming mixing discharge gate (20); Be provided with the densitometer (11) and the underflow adjusting device (7) that link to each other with density controller (10) in the sorting classifying staving, the exit of described cleaned coal overflow launder (5) is provided with the cleaned coal blow-off valve (19) of control desliming amount.
2. the liquid-solid fluid bed separation of coarse slime grading plant of desliming type according to claim 1, it is characterized in that: described underflow adjusting device (7) comprises motorized adjustment executing agency, wedge shape mine tailing valve (17), be connected with connecting rod (6) between motorized adjustment executing agency and the wedge shape mine tailing valve (17), connecting rod (6) is provided with the distance adjustment pipe.
3. the liquid-solid fluid bed separation of coarse slime grading plant of desliming type according to claim 1 is characterized in that: described base cone (16) outlet side is provided with the bypass pipe (18) by the control of ore drawing valve.
4. the liquid-solid fluid bed separation of coarse slime grading plant of desliming type according to claim 1 is characterized in that: described feed desliming device (1) is feed cyclowass or desliming bucket.
CN 201010161063 2010-04-23 2010-04-23 Coarse coal slime sorting and grading plant for desliming type liquid-solid fluid bed Expired - Fee Related CN101850293B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102205263A (en) * 2011-05-24 2011-10-05 中国矿业大学 Coal slime classified concentration device
CN102327807A (en) * 2011-09-21 2012-01-25 符世琛 Three-product teetered bed separator
CN105435951A (en) * 2015-12-22 2016-03-30 大同煤矿集团有限责任公司 Coarse slime separation machine
CN106391292A (en) * 2016-10-31 2017-02-15 中国矿业大学 Liquid-solid fluidized bed sorting machine and material sorting method employing same
CN106669953A (en) * 2017-01-13 2017-05-17 中国矿业大学 Desliming type coarse slime separation overflow clean coal grading device of liquid-solid fluidized bed
CN106694204A (en) * 2017-01-13 2017-05-24 中国矿业大学 Device for separation and overflow of coarse coal slime and slime removal and classification of clean coal slime through liquid-solid fluidized bed
CN108435406A (en) * 2018-04-04 2018-08-24 中国矿业大学 A kind of separation of coarse slime device with stabilization fluid environment
CN110433951A (en) * 2019-08-20 2019-11-12 中国恩菲工程技术有限公司 Fluidization screening installation based on bed of material position and bed layer pressure Collaborative Control
CN114713379A (en) * 2021-07-22 2022-07-08 中国矿业大学 Fluidized flotation device and method suitable for coarse particle recovery

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EP0508335A2 (en) * 1991-04-09 1992-10-14 Allmineral Aufbereitungstechnik Gmbh & Co. Kg Device for seperating light materials from sand and gravel
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102205263A (en) * 2011-05-24 2011-10-05 中国矿业大学 Coal slime classified concentration device
CN102205263B (en) * 2011-05-24 2013-04-24 中国矿业大学 Coal slime classified concentration device
CN102327807A (en) * 2011-09-21 2012-01-25 符世琛 Three-product teetered bed separator
CN105435951A (en) * 2015-12-22 2016-03-30 大同煤矿集团有限责任公司 Coarse slime separation machine
CN106391292A (en) * 2016-10-31 2017-02-15 中国矿业大学 Liquid-solid fluidized bed sorting machine and material sorting method employing same
CN106669953A (en) * 2017-01-13 2017-05-17 中国矿业大学 Desliming type coarse slime separation overflow clean coal grading device of liquid-solid fluidized bed
CN106694204A (en) * 2017-01-13 2017-05-24 中国矿业大学 Device for separation and overflow of coarse coal slime and slime removal and classification of clean coal slime through liquid-solid fluidized bed
CN108435406A (en) * 2018-04-04 2018-08-24 中国矿业大学 A kind of separation of coarse slime device with stabilization fluid environment
CN108435406B (en) * 2018-04-04 2024-03-15 中国矿业大学 Coarse slime sorting unit with stable fluidization environment
CN110433951A (en) * 2019-08-20 2019-11-12 中国恩菲工程技术有限公司 Fluidization screening installation based on bed of material position and bed layer pressure Collaborative Control
CN114713379A (en) * 2021-07-22 2022-07-08 中国矿业大学 Fluidized flotation device and method suitable for coarse particle recovery
CN114713379B (en) * 2021-07-22 2023-09-29 中国矿业大学 Fluidized flotation device and method suitable for coarse particle recovery

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