CN106391268A - Coal crushing, grading and sorting device and method - Google Patents
Coal crushing, grading and sorting device and method Download PDFInfo
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- CN106391268A CN106391268A CN201611076253.2A CN201611076253A CN106391268A CN 106391268 A CN106391268 A CN 106391268A CN 201611076253 A CN201611076253 A CN 201611076253A CN 106391268 A CN106391268 A CN 106391268A
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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
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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
- 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
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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
- 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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Abstract
The invention provides a coal crushing, grading and sorting device which comprises a coarse crushing, grading and sorting unit and a re-crushing, grading and sorting unit, wherein the coarse crushing, grading and sorting unit comprises a feeder, an impact type crusher, a coarse crushing and grading machine and a first dust remover which are sequentially connected through a pipeline; the re-crushing, grading and sorting unit comprises a gas-flow crusher, a fine crushing and grading machine, a cyclone collector and a second dust remover which are sequentially connected through a pipeline; and the coarse crushing and grading machine is connected with the gas-flow crusher. The invention further provides a method for crushing, grading and sorting coal by utilizing the device. The coal crushing, grading and sorting device is scientific and reasonable in structural design, is simple in process, is less in investment, is high in grading and sorting efficiency, and guarantees product quality through multi-stage grading, so that the grain size and ash content of a target product reach requirements; and water resources can be saved, and economic benefits are remarkable.
Description
Technical field
The invention belongs to coal pulverize classification and sorting technical field and in particular to a kind of coal pulverize classifying and sorting device and
Method.
Background technology
The occurrence status of fluorine in coal show, only coal dust are broken to finer grain, and mineral therein could fully dissociate,
Thus realizing the in-depth upgrading of coal, obtain high-quality low-sulfur low ash extract coal.During this, the high energy consumption of pulverizing is inefficient
Problem is always the emphasis of everybody concern, is especially projected with the high energy inefficiency problem of Jet Crushing.At present, superfine grinding is general
Take chemical synthesiss and mechanical crushing method.Chemical synthesiss are only having on a small quantity because of complex process, high cost, the low reason of yield
Just can use in the technique of particular/special requirement；Mechanical crushing method is because of the mechanical force of process is simple, low cost, yield height and generation
Act on the advantages of can also improve material performance and apply wider.Its main active force mode of different mechanical crushing equipments is
Different, crush force mode produces material impact to the superfine grinding characteristic of coal and mineral disaggregation, selects suitable pulverizing to set
Standby (crush force mode) is beneficial to strengthen the selectivity of coal crushing process, thus reaching the effect that fall can put forward effect.Therefore, exist
Coal is deepened in the research process of upgrading technology, seeks the more excellent crush force mode of coal, and disintegrating apparatus main body is done into one
Step optimizes, perfect, and it is even fine graded to realize selective molecular attraction, significant for actual production.
Consider from existing coal separation technology, current fine fraction coal separation method mainly includes wet split and dry method
Sorting.Wet split, using water as medium, water consumption is big, and investment is high and easily causes serious environmental pollution, simultaneously for dry
The sorting of non-irrigated water-deficient area coal causes very big difficulty, and because material is very thin, product dehydrate difficulty is larger.In addition, wet method is divided
Choosing also has some particular requirements to the ature of coal of feed coal.Dry coal preparation technology can be with effectively solving particle agglomeration, slime water treatment
Etc. a series of difficulties, the dry separation technology with gas phase as bulk media, coal grain and coal grain, coal grain and mineral in its assorting room
Will not reunite because of the effect of water together between granule and mineral grain, make more to disperse between granule, active force is more uniform.
But in traditional Bed for Fine Coal dry separation technology, friction electrical selection is only suitable to the higher raw coal of ash and roughly selects fall ash, and exists certain
Sorting granularity lower limit；Combined type dry separation method is primarily adapted for use in the sorting of lump coal, poor to Fine grain content effect；Air
It is 0.5mm that dense medium fluidized bed dry separation method has sorting granularity lower limit, and these methods are all unsuitable for ultra-fine grade coal
Sorting.Thus, the demand based on western coal development of resources and challenge, a kind of efficient, easy-operating dry separation transposition of research
And method is extremely urgent come the in-depth upgrading to realize coal.
Content of the invention
It is an object of the invention to overcoming above-mentioned deficiency of the prior art, a kind of coal is provided to pulverize classifying and sorting device
And method, its scientific structure design rationally, process is simple, small investment, classification and sorting efficiency high, product is ensured by multi-level hierarchical
Quality, makes the granularity of target product and ash reach requirement；Energy saving water resource, and remarkable in economical benefits.
For achieving the above object, the technical solution used in the present invention is：A kind of coal pulverizes classifying and sorting device, its feature
It is：Including coarse pulverization classification and sorting unit and crushing and classification separation unit again, described coarse pulverization classification and sorting unit includes leading to
Batcher, impact grinder, coarse crushing grader and the first cleaner unit that piping is sequentially connected, the described sorting of crushing and classification again
Unit includes jet mill, grader in small, broken bits, cyclone collector and the second cleaner unit being sequentially connected by pipeline, described thick
Broken grader is connected with jet mill by pipeline.
A kind of above-mentioned coal pulverize classifying and sorting device it is characterised in that：Described coarse crushing grader and grader in small, broken bits
It is dry air grader.
A kind of above-mentioned coal pulverize classifying and sorting device it is characterised in that：Described impact grinder is mechanical shock
Formula pulverizer.
A kind of above-mentioned coal pulverize classifying and sorting device it is characterised in that：Described jet mill fluidizes for collision type
Bed jet mill.
A kind of above-mentioned coal pulverize classifying and sorting device it is characterised in that：Described first cleaner unit and the second cleaner unit
It is sack cleaner.
In addition, present invention also offers a kind of utilization said apparatus method of pulverizing classification and sorting to coal, its feature exists
In the method comprises the following steps：
Step one, using batcher, raw coal is fed in impact grinder and carry out coarse pulverization, obtain coarse crushing product；Punching
The rotating speed hitting formula pulverizer is 1200r/min～2600r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader is 1600r/min～2500r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit, obtains
It is 10 μm～50 μm coarse crushing dust products to particle diameter；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product fed in jet mill with 60g/min～120g/min inventory
Pulverize further, obtain product in small, broken bits；The pulverizing pressure of described jet mill is 0.3MPa～0.6MPa, described product in small, broken bits
Particle diameter be 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader in small, broken bits is 4500r/min～18000r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
A kind of above-mentioned coal pulverize classification and sorting method it is characterised in that：The particle diameter of raw coal described in step one≤
25mm.
The present invention compared with prior art has advantages below：
1st, the theory based on selective crushing and gravity classification sorting for the technique of the present invention, by multi-stage crushing and classification
Tandem process, has reached the purpose of coal superfine grinding classification and sorting integration.
2nd, coarse pulverization classification and sorting unit of the present invention can exclude the high ash products of a part of particulate in advance, is that back segment is pulverized point again
Effect of level separation unit provides the foundation, and ensures product quality by multi-level hierarchical, makes granularity and the ash of target product
Divide and reach requirement.
3rd, present invention process has pulverizing, purification, the multi-functional of classification, has the advantages that dry separation, technological process
Simply, save capital expenditure, and saving water resource.
4th, the present invention is directed to low ash coal, can be utilized this technological process to reduce ash further to while coal superfine grinding
Point, as the desirable feedstock preparing carbon material, and then the coal product of high added value can be made.
5th, the present invention is suitable to raw coal coarse pulverization to by the impact grinder of coarse pulverization classification and sorting unit
Granularity, then realizes coarse crushing classification by coarse crushing grader, and classification fine fraction product contains more clay mineral, removing dust device
Effect of sorting fall ash is reached after collection；The graded product removing high ash clay mineral enters crushing and classification separation unit in fact again
Existing secondary superfine grinding, milling product obtains qualified products after multi-level hierarchical, also can obtain multi-level Product simultaneously.
Below by drawings and Examples, the present invention is described in further detail.
Brief description
Fig. 1 is the structural representation of the present invention.
Description of reference numerals:
1 batcher；2 impact grinders；3 coarse crushing graders；
4 first cleaner units；5 jet mills；6 graders in small, broken bits；
7 cyclone collectors；8 second cleaner units.
Specific embodiment
The present invention is pulverized classifying and sorting device to coal and is described by embodiment 1.
Embodiment 1
Classifying and sorting device pulverized by a kind of coal as shown in Figure 1, pulverize point including coarse pulverization classification and sorting unit with again
Level separation unit, batcher 1 that described coarse pulverization classification and sorting unit includes being sequentially connected by pipeline, impact grinder 2,
Coarse crushing grader 3 and the first cleaner unit 4, the described separation unit of crushing and classification again includes the comminution by gas stream being sequentially connected by pipeline
Machine 5, grader in small, broken bits 6, cyclone collector 7 and the second cleaner unit 8, described coarse crushing grader 3 passes through pipeline and jet mill 5
Connect.
In the present embodiment, described coarse crushing grader 3 and grader in small, broken bits 6 are dry air grader, described impact type
Pulverizer 2 is mechanical impact crusher, and described jet mill 5 is collision type fluidized bed air flow crusher, and described first removes
Dirt device 4 and the second cleaner unit 8 are sack cleaner.
The present invention is pulverized classification and sorting method to coal and is described by embodiment 2 to 7.
Embodiment 2
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 2300r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 2200r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 60g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.3MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 4500r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Embodiment 3
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 1800r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 2500r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 90g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.5MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 18000r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Embodiment 4
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 2600r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 1600r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 60g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.6MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 16000r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Embodiment 5
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 1200r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 2200r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 90g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.5MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 16000r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Embodiment 6
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 2600r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 2200r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 90g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.45MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 18000r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product.
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits；
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Embodiment 7
In conjunction with Fig. 1, the present embodiment is included following using the method that device as described in Example 1 pulverizes classification and sorting to coal
Step：
Step one, using batcher 1, raw coal is fed in impact grinder 2 and carry out coarse pulverization, obtain coarse crushing product
With thick deslagging；The rotating speed of impact grinder 2 is 2300r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader 3 it is classified, obtain coarse crushing classification
Fine fraction product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader 3 is 2500r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product located respectively
Manage, the processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit 4,
Obtaining particle diameter is 10 μm～50 μm coarse crushing dust products；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product further powder in jet mill 5 is fed with 120g/min inventory
Broken, obtain product in small, broken bits and deslagging in small, broken bits；The pulverizing pressure of described jet mill 5 is 0.5MPa, the grain of described product in small, broken bits
Footpath is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader 6 in small, broken bits carry out reclassification, obtain in small, broken bits point
Level fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader 6 in small, broken bits is 6800r/min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector 7 and is classified further, obtain
To whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described
10 μm of ＜ D2≤30 μm of the particle diameter of whirlwind coarse fraction product；
Step D, the product of whirlwind fine fraction described in step C is collected through the second cleaner unit 8, obtain particle diameter be 0.01 μm～
10 μm of dust products in small, broken bits.
In the present embodiment, the particle diameter≤25mm of raw coal described in step one.
In the present embodiment, coarse crushing product, coarse crushing classification fine fraction product, coarse crushing classification coarse fraction product, product in small, broken bits, thin
Broken classification fine fraction product and whirlwind fine fraction product are to carry out wind-force push by wind-force mechanism such as air compressor.
Former pit ash is sorted by the crushing and classification that the present embodiment prepares and yield is as shown in table 1.
Former pit ash after the sorting of table 1 embodiment 2-7 crushing and classification and yield results
By upper table it can be seen that：The coarse crushing classification coarse fraction obtaining after coarse pulverization classification and sorting cell processing produces
Product, and deslagging in small, broken bits, classification coarse fraction product in small, broken bits and the whirlwind coarse grain obtaining after crushing and classification separation unit again is processed
The ash of level product is below raw coal, reaches the grey effect of preferable upgrading fall, and the ash of whirlwind coarse fraction product is minimum, yield
Highest；1.5% about, yield is more than 50% to its ash, shows can obtain with the tandem process being classified by multi-stage crushing
The different graded product of ash, is utilized with the sub-prime realizing coal.
The above, be only presently preferred embodiments of the present invention, not the present invention imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure transformation that technical spirit is made to above example, all still fall within skill of the present invention
In the protection domain of art scheme.
Claims (7)
1. a kind of coal pulverize classifying and sorting device it is characterised in that：Including coarse pulverization classification and sorting unit and crushing and classification again
Separation unit, described coarse pulverization classification and sorting unit includes batcher (1), the impact grinder being sequentially connected by pipeline
(2), coarse crushing grader (3) and the first cleaner unit (4), the described separation unit of crushing and classification again includes being sequentially connected by pipeline
Jet mill (5), grader in small, broken bits (6), cyclone collector (7) and the second cleaner unit (8), described coarse crushing grader (3) is led to
Piping is connected with jet mill (5).
2. a kind of coal according to claim 1 pulverize classifying and sorting device it is characterised in that：Described coarse crushing grader
And grader in small, broken bits (6) is dry air grader (3).
3. a kind of coal according to claim 1 and 2 pulverize classifying and sorting device it is characterised in that：Described impact type powder
Broken machine (2) is mechanical impact crusher.
4. a kind of coal according to claim 1 and 2 pulverize classifying and sorting device it is characterised in that：Described comminution by gas stream
Machine (5) is collision type fluidized bed air flow crusher.
5. a kind of coal according to claim 1 and 2 pulverize classifying and sorting device it is characterised in that：Described first dedusting
Device (4) and the second cleaner unit (8) are sack cleaner.
6. a kind of using device as claimed in claim 1, the method for classification and sorting is pulverized it is characterised in that the method bag to coal
Include following steps：
Step one, using batcher (1), raw coal is fed in impact grinder (2) and carry out coarse pulverization, obtain coarse crushing product；
The rotating speed of impact grinder (2) is 1200r/min～2600r/min, and the particle diameter of described coarse crushing product is less than 1000 μm；
Step 2, coarse crushing product described in step one is fed in coarse crushing grader (3) and be classified, obtain coarse crushing classification thin
Grade product and coarse crushing classification coarse fraction product, the rotating speed of coarse crushing grader (3) is 1600r/min～2500r/min；
Step 3, by coarse crushing described in step 2 be classified fine fraction product and coarse crushing classification coarse fraction product be respectively processed,
The processing procedure that described coarse crushing is classified fine fraction product is：Coarse crushing classification fine fraction product is collected through the first cleaner unit (4), obtains
It is 10 μm～50 μm coarse crushing dust products to particle diameter；
The processing procedure that described coarse crushing is classified coarse fraction product is：
Step A, by coarse crushing classification coarse fraction product fed in jet mill (5) with 60g/min～120g/min inventory
Pulverize further, obtain product in small, broken bits；The pulverizing pressure of described jet mill (5) is 0.3MPa～0.6MPa, described in small, broken bits
The particle diameter of product is 0.01 μm～300 μm；
Step B, product in small, broken bits described in step A is fed in grader in small, broken bits (6) carry out reclassification, obtain classification in small, broken bits
Fine fraction product and classification coarse fraction product in small, broken bits, the rotating speed of described grader (6) in small, broken bits is 4500r/min～18000r/
min；
Step C, classification fine fraction product in small, broken bits described in step B is fed in cyclone collector (7) and is classified further, obtain
Whirlwind fine fraction product and whirlwind coarse fraction product, 0.1 μm≤D1≤10 μm of particle diameter of described whirlwind fine fraction product, described rotation
10 μm of ＜ D2≤30 μm of the particle diameter of wind coarse fraction product；
Step D, by the product of whirlwind fine fraction described in step C through the second cleaner unit (8) collect, obtain particle diameter be 0.01 μm～10
μm dust product in small, broken bits.
7. a kind of coal according to claim 6 pulverize classification and sorting method it is characterised in that：Raw coal described in step one
Particle diameter≤25mm.
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| CN201611076253.2A CN106391268A (en) | 2016-11-29 | 2016-11-29 | Coal crushing, grading and sorting device and method |
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