CN103801426B - A kind of dry type coal preparation method - Google Patents
A kind of dry type coal preparation method Download PDFInfo
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- CN103801426B CN103801426B CN201410094591.3A CN201410094591A CN103801426B CN 103801426 B CN103801426 B CN 103801426B CN 201410094591 A CN201410094591 A CN 201410094591A CN 103801426 B CN103801426 B CN 103801426B
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- coal
- metal impurities
- selection
- winnowing
- discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of dry type coal preparation method, which employs fragmentation, heating, temperature identification discharge, selection by winnowing, chain type discharge step, combine the advantage of the chain type discharge of air dense-medium separation machine and the inclined-plane sieve plate of baum jig in prior art, do not use dense media, greatly reduce sorting cost, using water wisely and electricity consumption, and take full advantage of the heat of drying raw coal, before entering selection by winnowing, these metal impurities are just discharged with temperature sensor identification metal impurities, carrier bar is also utilized to reclaim follow-up further isolated metal impurities are unified, more metal impurities are reclaimed to high-purity, prevent metals resources from wasting, and air distribution plate subregion is for pulse wind and lasting high wind, pin light grey matter, grey matter can also be combined with heating before the water vapour that raw coal produces, and is convenient to reclaim grey matter.
Description
Technical field
The present invention relates to a kind of coal preparation method, belong to dry type Concentrating Field.
Background technology
Existing coal separation method adopts wet split, and this method remains the pollution of coal slime after not only causing washing, and water consumption large, invest high, such as utilize dense medium cyclone and hydraulic jig to carry out coal separation.More than 2/3rds of coal in China recoverable reserves is distributed in the ground such as Shaanxi, the Inner Mongol, Shanxi of severe drought lack of water.Therefore in the urgent need to a kind of novel dry separation technology and equipment.Therefore Concentrating Field has engendered air dense medium coal picker in recent years, as dressing coal with dry fluidized bed method and the device thereof of China Mining College's research and development, refers to CN1005314A.And this kind of technology is also very ripe, a lot of Tangshan heavy industry enterprise is at this series products of production.But the empty Jie's coal picker of air also has its defect, be first exactly that this kind of machine has requirement to selected raw coal, raw coal water content directly will block air distribution plate too greatly, and coal is dried, be only the moisture content removed, a large amount of heats wastes, although water saving power consumption is also very serious; Secondly, this equipment use dense media, dense media is generally iron powder, need to carry out de-mediated to concentrate and tailings after dense medium is separated, also need frequent to supplement medium to air dense medium bed, not only add sorting cost, also likely cleaned coal is polluted, the present requirement more and more higher to pure coal cannot be reached; 3rd, the impurity of the granule non-ferromagnetic metal ore class in coal cannot be processed, such as copper class impurity, the ore particle grade of these metal species is less, easily carried secretly by coal dust coal grain in airbed and be selected into cleaned coal, being namely not easy during dense medium sorting to discharge completely and the magnetic separation recovering medium stage can not be selected completely.
Also have a kind of Wind-powered jigging dry method coal separator, as CN2889496Y, it utilizes the vibration of sieve plate and common wind, the compound motion of pulse wind reaches the object of sorting, finally can sub-elect troilite grain, cleaned coal and spoil.But this coal picker is only remove troilite grain with gravity treatment, and precision is very low, and (flotation also can remove iron ore grain sometimes to need again to carry out magnetic separation, but as using the area of dry type coal preparation method, water resource is rare, uses flotation to carry out coal separation hardly), which again increases the cost of sorting.And some together can not be discharged with spoil through sieve plate as the pure iron of damaged screw and so on, causes waste.The research of this patent to cloth wind also only rests on the primary stage, how those skilled in the art therefrom cannot learn to be only with wind and " can arrange volume damper on each branched bottom; for adjusting each little air compartment air quantity; reach whole sorting bed air quantity even; or adjust the air quantity of sorting bed different parts on demand, to reach the desirable of sorting material.”。
Summary of the invention
The object of the present invention is to provide a kind of dry type coal preparation method, solve the defect of dry type coal separation in aforesaid prior art.
The present invention realizes by the following method:
This dry type coal preparation method, which employs fragmentation, heating, temperature identification discharge, selection by winnowing, chain type discharge step, raw coal is divided into final cleaned coal, spoil, metal impurities.
Be more preferably, described destruction step is that raw coal enters first band conveyer belt by feeding groove, and first band conveyer belt is provided with breaker roll, and breaker roll circumferentially arranges broken block, and broken block is connected with breaker roll main body high resiliency, raw coal is ground into the feed particle size of regulation;
Being heated to be above first band conveyer belt, after breaker roll, connecing heating arrangement, for drying the coal after fragmentation, removing the too much moisture content in raw coal;
Temperature identification discharge, the discharge end of first band conveyer belt is provided with temperature detection, discharge structure, and it identifies metal impurities and gets rid of, and metal impurities are discharged to metal impurities row mouth;
Selection by winnowing and chain type discharge carry out in selection by winnowing room, be positioned at temperature detection, the below of discharge structure, selection by winnowing indoor have endless chain structure, endless chain structure is triangular arrangement, endless chain structure entirety is connected with excitation structure, under air distribution plate and excitation structure acting in conjunction, the inclined plane that coal charge forms along carrier bar glides, separated cleaned coal falls into cleaned coal outlet, spoil falls into spoil outlet, in selection by winnowing room, endless chain structure bottom also has metal impurities row mouth, metal impurities row mouth is positioned at cleaned coal outlet opposite side, metal impurities are pushed to metal impurities row mouth by the carrier bar opened,
Air distribution plate, dust removal machine and confession blower fan and air feed bus composition airflow circulating.
Be more preferably, air distribution plate is be arranged in parallel with corresponding carrier bar.
Be more preferably, controller is connected with endless chain structure with breaker roll, first band conveyer belt, temperature detection discharge structure, heating arrangement, confession blower fan, and controller has man-machine interface, manually can input the operating parameters of these structures.
Be more preferably, air distribution plate divides two pieces of regions, and be pulse wind region near top, bottom is lasting high wind region.
Be more preferably, when carrier bar opens and endless chain be 90 degree, and keep this angle, until carrier bar forwards coal charge transport section to.
The invention has the beneficial effects as follows:
1) combine the advantage of the chain type discharge of air dense-medium separation machine and the inclined-plane sieve plate of air jigging in prior art, do not use dense media, greatly reduce sorting cost, using water wisely and electricity consumption;
2) heat of drying raw coal is taken full advantage of, before entering selection by winnowing, these metal impurities are just discharged with temperature sensor identification metal impurities, also utilize carrier bar to reclaim follow-up further isolated metal impurities are unified, more reclaimed metal impurities to high-purity, prevented metals resources from wasting;
3) air distribution plate subregion is for pulse wind and lasting high wind, pins light grey matter; Grey matter can also be combined with heating before the water vapour that raw coal produces, and is convenient to reclaim grey matter.
Accompanying drawing explanation
Fig. 1 is the structural representation of dry type coal picker.
In figure: 1. feeding groove, 2. first band conveyer belt, 3. controller, 4. metal impurities row mouth, 5. carrier bar, 6. air distribution plate, 7. spoil row mouth, 8. cleaned coal row mouth, 9. sprocket wheel, 10. air feed bus, 11. for blower fan, 12. dust removal machines, 13. temperature detection discharge structures, 14. heating arrangements, 15. breaker rolls.
Detailed description of the invention
Be described further below in conjunction with accompanying drawing:
As shown in Figure 1, dry type coal picker of the present invention comprises separator main body, feeding groove 1 is had above separator main body, it is first band conveyer belt 2 under feeding groove, first band conveyer belt 2 is provided with breaker roll 15, for raw coal being ground into the feed particle size of regulation, first band conveyer belt 2 is the outer covered metal plate of glue formula conveyer belt, it can provide the broken basic plane of a larger intensity for fragmentation, breaker roll circumferentially arranges broken block, these broken blocks are connected with breaker roll main body high resiliency, if run into the spoil block that hardness is excessive, broken block bounces back to breaker roll main body, breaker roll can be avoided like this to damage or the shutdown of whole piece sorting streamline.Heating arrangement 14 is connect after breaker roll 15, heating arrangement is used for drying the coal after fragmentation, removes the too much moisture content in raw coal, prevents the coal dust wet from blocking air holes on carrier bar when sorting below, heating arrangement, originally as prior art, does not repeat them here.The discharge end of first band conveyer belt 2 is provided with temperature detection discharge structure 13, find this is because inventor divides in selection operation in reality, metal impurities are as troilite grain, temperature all can higher than coal grain when heating for damaged screw and copper mine grain etc., therefore this characteristic is utilized, while heating arrangement 14 removes raw coal excessive moisture, also metal impurities are heated to the temperature that enough and coal distinguishes, such temperature detection discharge structure 13 is by identifying these metal impurities to the detection of temperature and get rid of, most metal impurities are just excluded before entering selection by winnowing, sorting below can not be entered.
Coal charge through the sorting of temperature detection discharge structure 13 laggard enter selection by winnowing room, selection by winnowing indoor have endless chain structure, endless chain structure entirety is connected with excitation structure, endless chain structure is supported by three sprocket wheels 9 of inside, become a three-legged structure, endless chain structure is provided with multiple carrier bar 5, carrier bar 5 one end is articulated in endless chain structure, when carrier bar 5 is positioned at coal charge thrown wall, carrier bar 5 forms a plane for coal charge transport, the metal impurities running orbit side that carrier bar 5 is positioned at below endless chain structure or is discharged, carrier bar 5 rotates and is in open configuration.Be preferably, when carrier bar 5 opens and endless chain be 90 degree.Carrier bar 5 has multiple air holes, and the wind energy that air distribution plate 6 blows out is enough to be acted on coal charge stream through air holes.Air distribution plate preferably be arranged in parallel with corresponding connecting plate.The wind-force of air distribution plate 6 and excitation structure acting in conjunction are in coal charge stream, and air distribution plate 6 points of two pieces of regions are pulse wind region near top, and this region is by pulse wind by coal grain and the layering of spoil grain, and coal grain is on spoil grain.When coal charge flows through the lower area of air distribution plate 6, coal grain separates with spoil by the high wind of the blowout of air distribution plate, cleaned coal falls into cleaned coal outlet 8, spoil falls into spoil outlet 7, grey matter is thrown in the air by the pulse wind of air distribution plate, grey matter is turned back after meeting the such sustained wind of high wind, is namely locked in certain region, is caught afterwards by dust removal machine 12.So just achieve the possibility preventing grey matter from misprinting out from cleaned coal outlet 8 and spoil outlet 7.In addition, coal charge is downward in endless chain structure surface thereof, under the action of the forces of the wind, pressure between itself and carrier bar 5 reduces, therefore frictional force also reduces, coal charge stream annularly chain apparent motion quickening under the component of gravity, this not only accelerates the output that sorting also reduces the transport power of endless chain structure.Those skilled in the art can select the angle in inclination selection by winnowing face, and angle is unsuitable excessive, otherwise coal charge flowing is uncontrollable.
In the selection by winnowing stage, the troilite particle be not discharged in the temperature impurities removal stage drops to bottom selection by winnowing room by the air holes on carrier bar, is pushed to metal impurities row mouth 4 by the carrier bar below endless chain structure.If the metal impurities that the temperature impurities removal stage is discharged are blocked by the carrier bar 5 opened when metal impurities row mouth 4 falls, then can be slipped to bottom selection by winnowing room, be pushed to metal impurities row mouth 4 equally.Like this, metal impurities, by separating from coal charge stream with higher purity, are convenient to recovery below.
Air distribution plate 6, dust removal machine 12 and form airflow circulating for blower fan 11 and air feed bus 10, the water vapours produced after heating arrangement 14 pairs of coals heating are introduced in airflow circulating, and are combined with calcareous facies and are beneficial to grey matter in dust removal machine 12 sedimentation.
Controller 3 is connected with endless chain structure with breaker roll 15, first band conveyer belt 2, temperature detection, discharge structure 13, heating arrangement 14, confession blower fan 11, controller 3 has man-machine interface, manually can input the operating parameters of these structures, thus make whole assorting room steady.
Although carried out special description with reference to embodiment to the disclosed dry type coal preparation method related to; embodiment described above is illustrative and not restrictive; without departing from the present invention, all changes and amendment are all within protection scope of the present invention.
Claims (5)
1. a dry type coal preparation method, which employs fragmentation, heating, temperature identification discharge, selection by winnowing, chain type discharge step, raw coal is divided into final cleaned coal, spoil, metal impurities,
The described raw coal that is broken for enters first band conveyer belt by feeding groove, and first band conveyer belt is provided with breaker roll, and breaker roll circumferentially arranges broken block, and broken block is connected with breaker roll main body high resiliency, raw coal is ground into the feed particle size of regulation;
Being heated to be above first band conveyer belt, after breaker roll, connecing heating arrangement, for drying the coal after fragmentation, removing the too much moisture content in raw coal;
Temperature identification discharge, the discharge end of first band conveyer belt is provided with temperature detection discharge structure, and it identifies metal impurities and gets rid of, and metal impurities are discharged to metal impurities row mouth;
Selection by winnowing and chain type discharge carry out in selection by winnowing room, be positioned at the below of temperature detection discharge structure, selection by winnowing indoor have endless chain structure, endless chain structure is triangular arrangement, endless chain structure entirety is connected with excitation structure, under air distribution plate and excitation structure acting in conjunction, the inclined plane that coal charge forms along carrier bar glides, separated cleaned coal falls into cleaned coal outlet, spoil falls into spoil outlet, in selection by winnowing room, endless chain structure bottom also has metal impurities row mouth, metal impurities row mouth is positioned at cleaned coal outlet opposite side, metal impurities are pushed to metal impurities row mouth by the carrier bar opened,
Air distribution plate, dust removal machine and for blower fan and air feed bus composition airflow circulating, grey matter with to heat the water vapour that raw coal produces before and be combined, be convenient to recovery grey matter.
2. method according to claim 1, is characterized in that: air distribution plate is be arranged in parallel with corresponding carrier bar.
3. method according to claim 1, it is characterized in that: controller is connected with endless chain structure with breaker roll, first band conveyer belt, temperature detection discharge structure, heating arrangement, confession blower fan, controller has man-machine interface, manually can input the operating parameters of these structures.
4. method according to claim 1, is characterized in that: air distribution plate divides two pieces of regions, and be pulse wind region near top, bottom is lasting high wind region.
5. method according to claim 1, is characterized in that: when carrier bar opens and endless chain be 90 degree, and keep this angle, until carrier bar forwards coal charge transport section to.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510506084.0A CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| CN201510511980.6A CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201410094591.3A CN103801426B (en) | 2014-03-14 | 2014-03-14 | A kind of dry type coal preparation method |
| CN201510498724.8A CN104998715B (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410094591.3A CN103801426B (en) | 2014-03-14 | 2014-03-14 | A kind of dry type coal preparation method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510511980.6A Division CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201510506084.0A Division CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| CN201510498724.8A Division CN104998715B (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
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| CN103801426A CN103801426A (en) | 2014-05-21 |
| CN103801426B true CN103801426B (en) | 2015-09-30 |
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| CN201510511980.6A Pending CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201510498724.8A Active CN104998715B (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| CN201510506084.0A Pending CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| CN201410094591.3A Active CN103801426B (en) | 2014-03-14 | 2014-03-14 | A kind of dry type coal preparation method |
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| CN201510511980.6A Pending CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201510498724.8A Active CN104998715B (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| CN201510506084.0A Pending CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
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| CN105363520B (en) * | 2015-11-13 | 2017-10-13 | 中国矿业大学 | A kind of hydraulic roll breaker |
| CN106290457B (en) * | 2016-08-15 | 2018-11-20 | 唐山昂里智能科技有限公司 | A kind of method and special equipment based on temperature identification coal and gangue |
| CN107676093B (en) * | 2017-10-17 | 2019-03-08 | 河南理工大学 | The recognition methods of microwave irradiation-infra-red detection coal, cash |
| CN112266807B (en) * | 2019-04-12 | 2021-11-16 | 新沂市久元矿业有限公司 | Coal desulfurization device |
| CN110449259B (en) * | 2019-08-20 | 2021-10-08 | 神华神东煤炭集团有限责任公司 | Desliming equipment and desliming process |
| CN110404824A (en) * | 2019-08-21 | 2019-11-05 | 桂林电子科技大学 | A kind of raw coal and the quick sorting unit of gangue and method |
| CN113941451A (en) * | 2021-10-19 | 2022-01-18 | 柳晶科技集团(常州)股份有限公司 | Method for electrostatic separation casting of coal dust in fly ash |
| CN114308655B (en) * | 2021-12-24 | 2022-11-25 | 安徽理工大学 | Annular coal gangue sorting device and using method thereof |
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2014
- 2014-03-14 CN CN201510511980.6A patent/CN104998745A/en active Pending
- 2014-03-14 CN CN201510498724.8A patent/CN104998715B/en active Active
- 2014-03-14 CN CN201510506084.0A patent/CN105057023A/en active Pending
- 2014-03-14 CN CN201410094591.3A patent/CN103801426B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104998715A (en) | 2015-10-28 |
| CN105057023A (en) | 2015-11-18 |
| CN103801426A (en) | 2014-05-21 |
| CN104998715B (en) | 2020-12-18 |
| CN104998745A (en) | 2015-10-28 |
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