CN103801426A - Dry-type coal preparation method - Google Patents
Dry-type coal preparation method Download PDFInfo
- Publication number
- CN103801426A CN103801426A CN201410094591.3A CN201410094591A CN103801426A CN 103801426 A CN103801426 A CN 103801426A CN 201410094591 A CN201410094591 A CN 201410094591A CN 103801426 A CN103801426 A CN 103801426A
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- Prior art keywords
- coal
- metal impurities
- endless chain
- carrier bar
- discharge
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Classifications
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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
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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
- 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
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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
- 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
Landscapes
- 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 dry-type coal preparation method. The steps of crushing, heating, temperature identification discharging, air separation and chain type discharging are adopted, the advantages of chain type discharging of an air dense medium coal separator and an inclined screen plate of an air jigger in the prior art are combined, and a dense medium is not used, so that the separation cost is greatly reduced, and water consumption and electric consumption are reduced; moreover, the drying heat of raw coal is fully utilized, metal impurities are identified by a temperature sensor and are discharged before being subjected to air separation; the metal impurities which are further separated subsequently are recovered in a unified manner through a chain plate so as to be recovered with higher purity, and metal resources are prevented from being wasted; moreover, a sub-area of an air distribution plate supplies pulse wind and continuous strong wind to lock light ash; the ash can be combined with water steam generated by heating the raw coal and can be conveniently recovered.
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 is to adopt wet split, and this method not only can cause the pollution that remains coal slime after washing, and water consumption large, invest high, such as utilizing dense medium cyclone and hydraulic jig to carry out coal separation.The ground such as Shaanxi that more than 2/3rds is distributed in severe drought lack of water of coal in China recoverable reserves, the Inner Mongol, Shanxi.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 class technology is also very ripe, much Tangshan heavy industry enterprise is producing this series products.But the empty Jie's coal picker of air also has its defect, is exactly first that this class machine has requirement to selected raw coal, and raw coal water content will directly block too greatly air distribution plate, and coal is dried, be only the moisture content of removing, a large amount of heats waste, although water saving power consumption is also very serious; Secondly, this equipment has used dense media, dense media is generally iron powder, after separating, dense medium needs concentrate and tailings to carry out de-mediated, also need frequent air dense medium bed to be supplemented to medium, not only increase sorting cost, also likely cleaned coal has been polluted, cannot reach the present requirement more and more higher to pure coal; The 3rd, cannot process the impurity of the granule non-ferromagnetic metal ore class in coal, such as copper class impurity, the ore particle grade of these metal species is less, in airbed, easily carried secretly and be selected into cleaned coal by coal dust coal grain, be i.e. when dense medium sorting, be not easy 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 compound motion of the vibration of sieve plate and common wind, pulse wind to reach the object of sorting, finally can sub-elect troilite grain, cleaned coal and spoil.But this coal picker is only to remove troilite grain with gravity treatment, and precision is very low, (flotation also can be removed iron ore grain sometimes to need again to carry out magnetic separation, but as the area that uses dry type coal preparation method, water resource is rare, can carry out coal separation with flotation hardly), this has increased again the cost of sorting.And some can not see through sieve plate and together discharging with spoil as the pure iron of damaged screw and so on, cause waste.This patent also only rests on the primary stage to the research of cloth wind, how those skilled in the art cannot therefrom learn with wind and be only and " can on each branched bottom, volume damper be set; for adjusting each little air compartment air quantity; reach whole sorting bed air quantity even; or adjust on demand the air quantity of sorting bed different parts, to reach the desirable requirement 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, it has adopted fragmentation, heating, temperature identification discharge, selection by winnowing, chain type discharge step, and raw coal is divided into final cleaned coal, spoil, metal impurities.
More preferably, described broken step is that raw coal enters first band conveyer belt by feeding groove, and first band conveyer belt is provided with breaker roll, is arranging broken piece on breaker roll circumference, and broken piece is connected with breaker roll main body high resiliency, raw coal is ground into the feed particle size of regulation;
Be heated to be above first band conveyer belt, after breaker roll, connect heating arrangement, for the coal after fragmentation is dried, remove 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 is identified metal impurities and gets rid of, and metal impurities are arranged mouth discharged to metal impurities;
Selection by winnowing and chain type discharge carry out in selection by winnowing chamber, be positioned at temperature detection, the below of discharge structure, selection by winnowing is indoor has endless chain structure, endless chain structure is triangular arrangement, endless chain structural entity is connected with excitation structure, under air distribution plate and excitation structure acting in conjunction, coal charge glides along the inclined plane of carrier bar composition, separated cleaned coal falls into cleaned coal outlet, spoil falls into spoil outlet, in selection by winnowing chamber, endless chain structure bottom also has metal impurities row mouthful, metal impurities row mouth is positioned at cleaned coal outlet opposite side, the carrier bar opening is pushed metal impurities to metal impurities row mouthful,
Air distribution plate, dust removal machine and confession blower fan and air feed bus composition airflow circulating.
More preferably, air distribution plate is for to be arranged in parallel with corresponding carrier bar.
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, can manually input the operating parameters of these structures.
More preferably, air distribution plate divides two regions, is pulse wind region near top, and bottom is lasting high wind region.
More preferably, when carrier bar opens and endless chain be 90 degree, and keep this angle, until carrier bar forwards coal charge transportation 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) take full advantage of the heat of drying raw coal, before selection by winnowing, just discharge these metal impurities with temperature sensor identification metal impurities and entering, also utilize carrier bar to unified recovery of follow-up further isolated metal impurities, more reclaimed metal impurities to high-purity, prevent metals resources waste;
3) light grey matter, for pulse wind and lasting high wind, is pinned in air distribution plate subregion; 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 mouthful, 5. carrier bar, 6. air distribution plate, 7. spoil row mouthful, 8. cleaned coal row mouthful, 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.
The specific embodiment
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, there is feeding groove 1 separator main body top, it under feeding groove, is first band conveyer belt 2, 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 for fragmentation the broken basic plane of a larger intensity, on breaker roll circumference, arranging broken piece, these broken pieces are connected with breaker roll main body high resiliency, if run into the excessive spoil piece of hardness, broken piece bounces back to breaker roll main body, can avoid like this breaker roll to damage or the shutdown of whole piece sorting streamline.After breaker roll 15, connect heating arrangement 14, heating arrangement for the coal after fragmentation is dried, is removed the too much moisture content in raw coal, stops up the wind hole on carrier bar while preventing the sorting below of the coal dust that wets, 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, this is because inventor divides in selection operation and finds in reality, metal impurities are as troilite grain, temperature all can be higher than coal grain in the time of heating for damaged screw and copper mine grain etc., therefore utilize this specific character, when heating arrangement 14 is removed raw coal excessive moisture, also metal impurities are heated to temperature enough and that coal distinguishes, temperature detection discharge structure 13 is by identifying and get rid of these metal impurities the detection of temperature like this, most metal impurities are excluded just entering before selection by winnowing, can not enter sorting below.
Coal charge through the sorting of temperature detection discharge structure 13 laggard enter selection by winnowing chamber, selection by winnowing is indoor has endless chain structure, endless chain structural entity is connected with excitation structure, endless chain structure is supported by three sprocket wheels 9 of inside, become a three-legged structure, multiple carrier bars 5 are installed in endless chain structure, carrier bar 5 one end are articulated in endless chain structure, in the time that carrier bar 5 is positioned at coal charge thrown wall, carrier bar 5 forms a plane for coal charge transportation, the metal impurities running orbit side that carrier bar 5 is positioned at endless chain structure below or is discharged from, carrier bar 5 rotates and in open configuration.Be preferably, when carrier bar 5 opens and endless chain be 90 degree.On carrier bar 5, have multiple wind hole, the wind energy that air distribution plate 6 blows out enough sees through wind hole and acts on coal charge stream.Air distribution plate is preferably with corresponding connecting plate and be arranged in parallel.The wind-force of air distribution plate 6 and excitation structure acting in conjunction are flowed in coal charge, and 6 points of two regions of air distribution plate 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.In the time that coal charge flows the lower area of process air distribution plate 6, the high wind blowing out of air distribution plate separates coal grain and spoil, cleaned coal falls into cleaned coal outlet 8, spoil falls into spoil outlet 7, the pulse wind of air distribution plate is thrown to grey matter in the air, grey matter is turned back after meeting the such sustained wind of high wind, is locked in certain region, is caught afterwards by dust removal machine 12.So just realized prevent that grey matter from misprinting out from cleaned coal outlet 8 and spoil outlet 7 may.In addition, coal charge tilts downwards in endless chain structure, under the effect of wind-force, pressure between itself and carrier bar 5 reduces, therefore frictional force also reduces, under the component of the gravity coal charge stream quickening of moving along endless chain surface, this has not only accelerated sorting and has also reduced the output of the transport power of endless chain structure.Those skilled in the art can select the angle of inclination selection by winnowing face, and angle is unsuitable excessive, otherwise coal charge is mobile uncontrollable.
In the selection by winnowing stage, the troilite particle not being discharged from the temperature impurities removal stage drops to bottom, selection by winnowing chamber by the wind hole 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 from are arranged to metal impurities the carrier bar 5 being opened when mouth 4 falls and are blocked, can be slipped to bottom, selection by winnowing chamber, be pushed to equally metal impurities row mouth 4.Like this, metal impurities are separated from coal charge stream by the purity with higher, 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 vapour that heating arrangement 14 produces after to coal heating is introduced in airflow circulating, and is combined with calcareous facies and is beneficial to grey matter in dust removal machine 12 sedimentations.
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, can manually input the operating parameters of these structures, thereby make whole assorting room steady.
Although the disclosed dry type coal preparation method relating to has been carried out to special description with reference to embodiment; embodiment described above is illustrative and not restrictive; without departing from the present invention, all variations and modification are all within protection scope of the present invention.
Claims (6)
1. a dry type coal preparation method, it has adopted fragmentation, heating, temperature identification discharge, selection by winnowing, chain type discharge step, and raw coal is divided into final cleaned coal, spoil, metal impurities.
2. method according to claim 1, it is characterized in that: the described raw coal that is broken for enters first band conveyer belt by feeding groove, first band conveyer belt is provided with breaker roll, on breaker roll circumference, arranging broken piece, broken piece is connected with breaker roll main body high resiliency, raw coal is ground into the feed particle size of regulation;
Be heated to be above first band conveyer belt, after breaker roll, connect heating arrangement, for the coal after fragmentation is dried, remove 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 is identified metal impurities and gets rid of, and metal impurities are arranged mouth discharged to metal impurities;
Selection by winnowing and chain type discharge carry out in selection by winnowing chamber, be positioned at the below of temperature detection discharge structure, selection by winnowing is indoor has endless chain structure, endless chain structure is triangular arrangement, endless chain structural entity is connected with excitation structure, under air distribution plate and excitation structure acting in conjunction, coal charge glides along the inclined plane of carrier bar composition, separated cleaned coal falls into cleaned coal outlet, spoil falls into spoil outlet, in selection by winnowing chamber, endless chain structure bottom also has metal impurities row mouthful, metal impurities row mouth is positioned at cleaned coal outlet opposite side, the carrier bar opening is pushed metal impurities to metal impurities row mouthful,
Air distribution plate, dust removal machine and for blower fan and air feed bus composition airflow circulating, grey matter is combined with the water vapour that heats before raw coal generation, is convenient to reclaim grey matter.
3. method according to claim 1 and 2, is characterized in that: air distribution plate is for to be arranged in parallel with corresponding carrier bar.
4. according to the method described in claim 1-3 any one, 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, can manually input the operating parameters of these structures.
5. according to the method described in claim 1-4 any one, it is characterized in that: air distribution plate divides two regions, is pulse wind region near top, and bottom is lasting high wind region.
6. according to the method described in claim 1-5 any one, it is characterized in that: when carrier bar opens and endless chain be 90 degree, and keep this angle, until carrier bar forwards coal charge transportation section to.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
| CN201510506084.0A CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN201510498724.8A Division CN104998715B (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
| 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 |
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| CN103801426A true CN103801426A (en) | 2014-05-21 |
| CN103801426B CN103801426B (en) | 2015-09-30 |
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| CN201510498724.8A Active CN104998715B (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 |
| CN201510511980.6A Pending CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201510506084.0A Pending CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
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| CN201510511980.6A Pending CN104998745A (en) | 2014-03-14 | 2014-03-14 | Dry type coal dressing method |
| CN201510506084.0A Pending CN105057023A (en) | 2014-03-14 | 2014-03-14 | Dry coal dressing method |
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| CN104971818A (en) * | 2015-06-19 | 2015-10-14 | 黄斌 | Efficient energy-saving ore grinding device |
| CN105149073A (en) * | 2015-10-09 | 2015-12-16 | 湖南万通科技有限公司 | Feeding crushing device |
| CN105363520A (en) * | 2015-11-13 | 2016-03-02 | 中国矿业大学 | Hydraulic roller type crusher |
| 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 |
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| 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 |
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Cited By (7)
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|---|---|---|---|---|
| CN104971818A (en) * | 2015-06-19 | 2015-10-14 | 黄斌 | Efficient energy-saving ore grinding device |
| CN104971818B (en) * | 2015-06-19 | 2018-05-11 | 海门名驰工业设计有限公司 | A kind of ore lapping device |
| CN105149073A (en) * | 2015-10-09 | 2015-12-16 | 湖南万通科技有限公司 | Feeding crushing device |
| CN105363520A (en) * | 2015-11-13 | 2016-03-02 | 中国矿业大学 | Hydraulic roller type crusher |
| CN105363520B (en) * | 2015-11-13 | 2017-10-13 | 中国矿业大学 | A kind of hydraulic roll breaker |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104998745A (en) | 2015-10-28 |
| CN104998715A (en) | 2015-10-28 |
| CN104998715B (en) | 2020-12-18 |
| CN103801426B (en) | 2015-09-30 |
| CN105057023A (en) | 2015-11-18 |
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