CN201220219Y - Oscillatory type magnetic stabilization air dense medium fluidized bed dry method cull eliminator - Google Patents

Oscillatory type magnetic stabilization air dense medium fluidized bed dry method cull eliminator Download PDF

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Publication number
CN201220219Y
CN201220219Y CNU2008200812184U CN200820081218U CN201220219Y CN 201220219 Y CN201220219 Y CN 201220219Y CN U2008200812184 U CNU2008200812184 U CN U2008200812184U CN 200820081218 U CN200820081218 U CN 200820081218U CN 201220219 Y CN201220219 Y CN 201220219Y
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China
Prior art keywords
screen surface
compass screen
backboard
dry method
oscillatory type
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Expired - Fee Related
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CNU2008200812184U
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Chinese (zh)
Inventor
张桂芳
张宗华
刘卫强
陈晓鸣
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

The utility model relates to dry coal preparation machinery which belongs to the technical field of mineral process. The dry coal preparation machinery mainly comprises a rock feeding mechanism, a dry separator mechanism, a fan mechanism and a dust removing mechanism, wherein the discharging end of the screening surface belt of the lathe bed of the dry separator is lower than a transverse inclination angle at the rear end, and the rock feeding end of the screening surface belt is lower than the longitudinal inclination angle; the bottom surface of the screening surface is provided with a permanent-magnet; and the separator is connected with a scrambler with the vibration direction consistent with the discharging direction. The design of the device can prevent blibes from generating so that a bed layer is more stable, thereby being more favorable for mineral stratification of different densities, and widening the operating range; the generated products are varied, and the finally generated tailings are approximate to pure recrement; the situation that an air dense medium fluidized bed is only a standard particulately fluidized bed is improved, and the separation state of short grained minerals is improved; in addition, the problem of equipment wearing is solved, thus the loss rate of clean coal is lowered to the lowest extent to basically achieve the design without pollution.

Description

Oscillatory type magnetic is stablized dense media fluid bed dry method cull eliminator
Technical field
The utility model relates to a kind of machinery of dry coal preparation, belongs to technical field of mineral processing.
Background technology
The coal preparation method of utilization mainly contains wet coal preparation and dry coal preparation at present.Need a large amount of water in the wet coal preparation process, the water resource poorness is a worldwide problem, and coal resources in China mainly is distributed in the west area of drought and water shortage again; Secondly, a considerable amount of young coals of China are met the easy argillization of water, are difficult for adopting wet split; The 3rd, the outer water of wet split product is up to more than 12%, and severe cold area easily freezes winter, storing difficulty causes part coal preparation plant to be forced to stop production, and adopts the wet method jigging, heavily is situated between and coal floatation, amount of investment is big, and the producing cost height has limited the development of some areas coal enterprise.Can be divided into wind method and dry method heavy media coal separation in the dry coal preparation again.Wind method is owing to exist feed particle size narrow, limit for height under the feed particle size, and shortcoming such as coal separation efficient is low, and the work air quantity is big, and dust pollution is serious, therefore, its range of application is less.The air dense medium fluid bed that is used for the sorting of 50~6mm level rough coal at present belongs to the bubbling bed, owing to the existence of bubble causes that the solid medium solid has back-mixing to a certain degree, so sorting granularity lower limit is higher, can't satisfy<the efficient sorting requirement of 6mm grade coal.Yet, the former coal 50~6mm of China sized coal carbon content less than 40%,<6mm level coal content accounts for more than 60%.Along with the development that the technology of adopting is combined in the increase and the modernization of coal mining difficulty,<6mm level coal also can increase at the content of former coal.Therefore, it is necessary studying the efficient separation Theory and the technology that are suitable for wholegrain level coal separation.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of oscillatory type magnetic and stablizes dense media fluid bed dry method cull eliminator, and its feed particle size is narrower, and the feed particle size lower limit is low, is suitable for wholegrain level coal high-efficiency branch.
Solving the scheme that technical problem of the present utility model adopts is: on the existing dry coal preparation Mechanical Fundamentals of mainly being made up of rock feeder structure, dry-dressing machine mechanism, blower fan mechanism and dedusting mechanism, make the bed body compass screen surface band exhaust end of separator be lower than the cross dip of rear end, compass screen surface brings the vertical inclination angle that the ore deposit end is lower than the discharge refuse end; The bottom surface of compass screen surface is equipped with permanent magnet; Separator is connected with the device frequently that shakes, and direction of vibration is consistent with the discharging direction.
The technical solution of the utility model also comprises:
Compass screen surface adopts ladder structure of right angle, and it is to the wide 0.6m~1.0m of ore deposit end, and it is material that the wide 0.4m~0.6m of discharge refuse end, the long 1.1m~1.3m of backboard, backboard, side plate and compass screen surface adopt non-magnetic steel plate, and backboard, the side plate design height of bed body are 190mm~210mm; The permanent magnet of compass screen surface bottom is a parallel circuits.
Medial surface at compass screen surface is provided with a series of glazing bars vertical with the backboard direction, and backboard has the oblique angle that leans forward to exhaust end, and discharge baffle plate and side plate adopt height-adjustable chute syndeton.
The cross dip α of compass screen surface is 1 °~15 °, and vertical inclination angle β is 1 °~6 °, and the backboard top rake is 40 °~60 °.
The glazing bar height is 20mm~40mm, and the glazing bar spacing is 170mm~190mm, and the aperture is 2mm~4mm, and hole centre-to-centre spacing is 6mm~8mm.
Permanent magnet magnetic patch group is 90mm~110mm apart from the end line distance at compass screen surface two ends, magnetic patch group spacing 90mm~110mm; On the ventilation duct of compass screen surface lower air chamber ball valve is housed, installs gauze more than two layers under the compass screen surface additional; Compass screen surface adopts non-magnetic 3mm steel plate to make, and backboard and side plate adopt non-magnetic 1mm steel plate to make.
Assorting room described in the utility model can be summed up as follows: raw coal feeds through surge bunker, pass through shaking feeder then, enter the sorting bed and carry out sorting, material can be at the inboard tumbling motion that can do among a small circle of backboard, compass screen surface front end discharge height of baffle plate is adjustable, can form certain thickness of bed layer; Under the effect of magnetic field, the generation of bubble is suppressed, and has strengthened the stability of bed, and the adjustable range of bed density enlarges; The fluidisation of bed is strengthened in the introducing of vibration, improved only the be as the criterion situation of dispersion fluidized bed of air dense medium fluidized bed, make the little density mineral of bulky grain more help come-up, the big density mineral of bulky grain then quicken, simultaneously also well broken bubble, strengthened the stability of bed, improved the sorting situation of granule mineral, thereby cleaned coal, middle coal, tail coal are discharged from diverse location.The coal dust that is blown afloat is collected through cyclone dust collectors, and cleaned air passes then is discharged into atmosphere through air-introduced machine.
The beneficial effects of the utility model are:
Magnetic force and vibrational system are introduced air dense medium fluidized bed dry coal preparation system simultaneously, realize the branch row problem of cleaned coal, tail coal, the introducing of vibration has formed automatic sorting, solved the difficult problem of equipment attrition, make simultaneously to form a kind of convection current sorting campaign between the fluid bed levels, help efficient sorting.Then formed layer by layer to the discharge refuse end for spoil and to advance, the effect of sorting layer by layer makes the loss late of cleaned coal drop to minimum.
Introduce magnetic field, improved the situation that air dense medium fluidized bed is unfavorable for the sorting small particles material, and the adding in magnetic field suppresses the generation of bubble, strengthened the stability of bed, enlarged the adjustable range of bed density, widened opereating specification.
The fluidisation of having strengthened bed has then been played in the introducing of vibration, make the little density mineral of bulky grain more help come-up, the big density mineral of bulky grain then quicken to sink, also well broken simultaneously bubble, strengthen the stability of bed, improved the sorting situation of granule mineral.
Description of drawings
Fig. 1 is each equipment contact figure in the utility model;
Fig. 2 is the utility model schematic perspective view;
Fig. 3 is the utility model front view;
Fig. 4 is the utility model B-B cutaway view;
Fig. 5 the utility model magnetic patch layout drawing.
Among the figure: main air blower 1, cleaned coal 2, separator 3, vibrofeeder 4, surge bunker 5, go into coal separation 6, control valve 7, cyclone dust collectors 8, air-introduced machine 9, coal dust 10, tail coal 11, middle coal 12, air compartment 13, broadside side plate 14, backboard 15, compass screen surface 16, glazing bar 17, narrow avris plate 18, discharge baffle plate 19, wind hole 20, magnetic patch 21, device 22 frequently shakes.
The specific embodiment
Referring to each figure, this device mainly is made up of rock feeder structure, dry-dressing machine mechanism, blower fan mechanism and dedusting mechanism.The rock feeder structure has comprised vibrofeeder 4 and surge bunker 5, and dedusting mechanism comprises cyclone dust collectors 8 and air-introduced machine 9, and the main air blower 1 of blower fan mechanism forms the essential wind-force (Fig. 1) of fluid bed for separator 3 provides.The bed body compass screen surface 16 of separator 3 has the cross dip α that exhaust end is lower than the rear end, according to selected colliery kind difference, can be 1 °~15 ° scope adjustment, compass screen surface 16 also has the vertical inclination angle β that is lower than the discharge refuse end to the ore deposit end, size is for being 1 °~6 °, backboard has the oblique angle that leans forward to exhaust end, and the angle of bevel of this example is 45 ° (Fig. 4).The bottom surface of compass screen surface 16 is equipped with permanent magnet, with the six roots of sensation aluminium box that is uneven in length, after filling rubidium-iron-boron magnetic patch 21 therein, be fixed in compass screen surface 16 times with nut, permanent magnet designs for parallel circuits, 21 groups of end line distances apart from compass screen surface 16 two ends of this example magnetic patch are 100mm, and 21 groups of spacings of magnetic patch are 100mm.
See Fig. 2, separator is connected with the device 22 frequently that shakes, and direction of vibration is consistent with the discharging direction, and shaking frequently, device adopts 3kw, 0~60Hz; Because of separator heavily is about 150kg, the design amplitude is 4~6mm, and the stability in order to vibrate, and we have selected two VA-1054-W type vibrating motors (exciting force 0~10KN, power 0.5kw) for use.Shock-absorbing spring is got two kinds, two every kind: a kind of diameter 3.5mm, and middle footpath 40mm, the number of coils is 19; Another kind of diameter 3mm, middle footpath 40mm, the number of coils is 20.
See Fig. 2, sorting compass screen surface 16 adopts non-magnetic 3mm steel plate to make, and has so just solved the problem that is unfavorable for installing additional magnetic patch 21.Compass screen surface 16 shapes adopt ladder structure of right angle, compass screen surface 16 to the wide 0.8m of ore deposit end, the wide 0.5m of discharge refuse end, the long 1.2m in the back side.Backboard 15 side boards 14 and the non-magnetic 1mm steel plate of 18 same employings are material, and design height is 200mm.Medial surface at compass screen surface 16 is provided with a series of glazing bars 17 vertical with backboard 15 directions, and it highly is 30mm, with discharge baffle plate angle be 30 °, glazing bar 17 spacing 180mm greater than 3 times maximum particle size, have prevented the phenomenon of the stuck compass screen surface 16 of bulk materials.Discharge baffle plate 19 adopts height-adjustable chute syndeton with side plate 14 and 18, has guaranteed the controllability of thickness of bed layer, but has also increased the degree of regulation of the operating condition of product simultaneously.In order to increase the uniformity of cloth wind, compass screen surface 16 has adopted high density, the design in little wind hole: aperture 3mm, hole centre-to-centre spacing 8mm.In order to increase the controllability of air pressure air flow, compass screen surface has adopted 13 designs of four air compartments for 16 times, has loaded onto ball valve on the ventilation duct below each air compartment 13 simultaneously.Compass screen surface installs four layers of gauze for 16 times additional, and it is excessive so just to have solved wind speed, is unfavorable for forming the problem of stable fluid bed.
According to the difference of coal spoil proportion, and domestic existing dry coal preparation report data, design wind pressure is 4000~4500pa.Go up according to this data, this example has been made following supporting selection: two typhoon machines all adopt 9-26 type high pressure centrifugal blower fan.The fundamental performance parameter of equipment is as follows: main air blower adapted motor model Y160M2-2, power 15kw, main air blower air quantity 4293~6349m 3/ s, total head 6035~5381pa; Air-introduced machine adapted motor model Y132S2-2, power 7.5kw, air quantity 3130~3685m 3/ s, total head 4910~4776pa; Deduster model: XZZ-D750, wind flow 4350~5630m 3/ s.
The sorting of this device is implemented as follows:
Example 1: the coal sample 100kg with specimen preparation carries out the sieve test investigation.Use 10mm respectively, 2.5mm, the sieve of 0.45mm sieves coal sample, and the raw coal after the screening is respectively 1.2,1.4,1.6 ZnCl with the proportion of preparing 2Solution is done float-sink test, and the raw coal sieve analysis the results are shown in following table:
Grade (mm) 10~50 2.5~10 0.45~2.5 <0.45
Productive rate (%) 34.50 26.38 18.62 20.04
Ash content (%) 20.04 20.76 20.68 19.80
Experimental condition is that vibration frequency is 18, and vibration force is 4.5KN, and when compass screen surface (16) vertical inclination angle was-2.5 °, when cross dip was 3.5 °, result of the test saw the following form:
Name of product Productive rate (%) Ash content (%) Ash content rate (%)
Cleaned coal 83.06 14.94 62.80
Tail coal 13.74 49.33 34.30
Coal dust 3.2 18.05 2.90
Give the ore deposit 100 19.76 100
Example 2: the coal sample 100kg with specimen preparation carries out the sieve test investigation.Use 10mm respectively, 2.5mm, the sieve of 0.45mm sieves coal sample, and the raw coal after the screening is respectively 1.2,1.4,1.6 ZnCl with the proportion of preparing 2Solution is done float-sink test, and the raw coal sieve analysis the results are shown in following table:
Grade (mm) 10~50 2.5~10 0.45~2.5 <0.45
Productive rate (%) 47.69 20.24 16.83 15.24
Ash content (%) 24.38 24.82 24.64 20.07
Experimental condition is that vibration frequency is 18, and vibration force is 4.5KN, and compass screen surface (16) cross dip is 4.5 °, and vertical inclination angle is-1.5 °.Result of the test is as follows:
Name of product Productive rate (%) Ash content (%) Ash content rate (%)
Cleaned coal 79.23 16.14 54.88
Tail coal 17.10 57.21 41.99
Coal dust 3.67 19.97 3.13
Give the ore deposit 100 23.30 100
Example 3: the coal sample 100kg with specimen preparation carries out the sieve test investigation.Use 10mm respectively, 2.5mm, the sieve of 0.45mm sieves coal sample, and the raw coal after the screening is respectively 1.2,1.4,1.6 ZnCl with the proportion of preparing 2Solution is done float-sink test, and the raw coal sieve analysis the results are shown in following table:
Experimental condition is that vibration frequency is 18HZ, and vibration force is 4.5KN, and compass screen surface (16) cross dip is 3.5 °, and Angle of Trim is-2.5 °, and result of the test sees the following form:

Claims (6)

1, a kind of oscillatory type magnetic is stablized dense media fluid bed dry method cull eliminator, it is characterized in that: mainly form by rock feeder structure, dry-dressing machine mechanism, blower fan mechanism and dedusting mechanism, it is characterized in that: the compass screen surface band exhaust end of dry separation lathe body is lower than the cross dip of rear end, and compass screen surface brings the vertical inclination angle that the ore deposit end is lower than the discharge refuse end; The bottom surface of compass screen surface is equipped with permanent magnet; Separator is connected with the device frequently that shakes, and direction of vibration is consistent with the discharging direction.
2, stablize dense media fluid bed dry method cull eliminator by the described oscillatory type magnetic of claim 1, it is characterized in that: compass screen surface adopts ladder structure of right angle, it is to the wide 0.6m~1.0m of ore deposit end, wide 0.4m~the 0.6m of discharge refuse end, long 1.1m~the 1.3m of backboard, it is material that backboard, side plate and compass screen surface all adopt non-magnetic steel plate, and backboard, the side plate design height of bed body are 190mm~210mm; The permanent magnet of compass screen surface bottom is a parallel circuits.
3, stablize dense media fluid bed dry method cull eliminator by the described oscillatory type magnetic of claim 1, it is characterized in that: the medial surface at compass screen surface is provided with a series of glazing bars vertical with the backboard direction, backboard has the oblique angle that leans forward to exhaust end, and discharge baffle plate and side plate adopt height-adjustable chute syndeton.
4, stablize dense media fluid bed dry method cull eliminator by claim 2 or 3 described oscillatory type magnetic, it is characterized in that: the cross dip α of compass screen surface is: 1 °~15 °, vertical inclination angle β is: 1 °~6 °, the backboard top rake is: 40 °~60 °.
5, stablize dense media fluid bed dry method cull eliminator by the described oscillatory type magnetic of claim 4, it is characterized in that: the glazing bar height is 20mm~40mm, and the glazing bar spacing is 170mm~190mm, and the aperture is 2mm~4mm, and hole centre-to-centre spacing is 6mm~8mm.
6, stablize dense media fluid bed dry method cull eliminator by the described oscillatory type magnetic of claim 5, it is characterized in that: permanent magnet magnetic patch group is 90mm~110mm, magnetic patch group spacing 90mm~110mm apart from the end line distance at compass screen surface two ends; On the ventilation duct of compass screen surface lower air chamber ball valve is housed, installs gauze more than two layers under the compass screen surface additional; Compass screen surface adopts non-magnetic 3mm steel plate to make, and backboard and side plate adopt non-magnetic 1mm steel plate to make.
CNU2008200812184U 2008-05-19 2008-05-19 Oscillatory type magnetic stabilization air dense medium fluidized bed dry method cull eliminator Expired - Fee Related CN201220219Y (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
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CN104689976A (en) * 2013-12-04 2015-06-10 中国农业科学院农产品加工研究所 Vibrating screen of gravity separator for separating grains polluted by funguses and toxins thereof from grains
CN104689989A (en) * 2013-12-04 2015-06-10 中国农业科学院农产品加工研究所 Gravity separator used for separating seeds contaminated by fungi and toxin thereof in grains
CN105682809A (en) * 2013-10-29 2016-06-15 韩国地质资源研究院 Specific gravity screening device capable of simultaneously screening heavy mineral component and magnetic mineral component
CN107233995A (en) * 2017-07-12 2017-10-10 六盘水师范学院 It is a kind of that bed dry coal dressing machine is fluidized from medium gas-particle two-phase based on bed point plate
CN109482333A (en) * 2018-11-22 2019-03-19 中国矿业大学 A kind of dry-wet method combined process of enriching of Copper Ores

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105682809A (en) * 2013-10-29 2016-06-15 韩国地质资源研究院 Specific gravity screening device capable of simultaneously screening heavy mineral component and magnetic mineral component
CN104689976A (en) * 2013-12-04 2015-06-10 中国农业科学院农产品加工研究所 Vibrating screen of gravity separator for separating grains polluted by funguses and toxins thereof from grains
CN104689989A (en) * 2013-12-04 2015-06-10 中国农业科学院农产品加工研究所 Gravity separator used for separating seeds contaminated by fungi and toxin thereof in grains
CN104689989B (en) * 2013-12-04 2016-08-17 中国农业科学院农产品加工研究所 For sorting fungus and the gravity separator of endotoxin contamination seed thereof in corn
CN104689976B (en) * 2013-12-04 2016-08-17 中国农业科学院农产品加工研究所 For sorting the vibrosieve of the gravity separator of fungus and endotoxin contamination seed thereof in corn
CN107233995A (en) * 2017-07-12 2017-10-10 六盘水师范学院 It is a kind of that bed dry coal dressing machine is fluidized from medium gas-particle two-phase based on bed point plate
CN109482333A (en) * 2018-11-22 2019-03-19 中国矿业大学 A kind of dry-wet method combined process of enriching of Copper Ores
CN109482333B (en) * 2018-11-22 2020-02-14 中国矿业大学 Dry-wet combined enrichment process for copper ore

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Granted publication date: 20090415

Termination date: 20110519