CN110227600A - A kind of cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair - Google Patents
A kind of cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair Download PDFInfo
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- CN110227600A CN110227600A CN201910618675.5A CN201910618675A CN110227600A CN 110227600 A CN110227600 A CN 110227600A CN 201910618675 A CN201910618675 A CN 201910618675A CN 110227600 A CN110227600 A CN 110227600A
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- 239000000843 powder Substances 0.000 title claims abstract description 276
- 239000004568 cement Substances 0.000 title claims abstract description 59
- 238000000227 grinding Methods 0.000 title claims abstract description 54
- 239000012716 precipitator Substances 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims description 33
- 238000009792 diffusion process Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000003032 molecular docking Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
- 108010066057 cabin-1 Proteins 0.000 description 2
- 239000010877 mill tailing Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The present invention proposes a kind of using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail comprising pregrinding system, ball mill and mill tail dust-precipitator before raw material cabin, mill；Pregrinding system includes feed riser machine, steady feed bin, roll squeezer, discharging elevator, V-type powder concentrator and grinds preceding fine powder collector before grinding；Raw material cabin is connected to steady feed bin by feed riser machine；Fine powder collector is connected to ball mill before grinding；It particularly further include thering are mill tail is double to select powder system comprising have mill tail elevator, mill tail powder concentrator, mill tail superfine powder sorting machine, mill tail fine powder dust-precipitator and mill tail superfine powder dust-precipitator；The discharge port of ball mill, the feeding inlet for grinding tail elevator, mill tail powder concentrator and ball mill are connected into mill tail material first circulation circuit；The discharge port of ball mill, the feeding inlet for grinding tail elevator, mill tail superfine powder sorting machine and ball mill are connected into mill tail material second circulation circuit.Cement products particle diameter distribution prepared by the present invention is wide, fineness is steady, and partial size may be implemented and precisely prepare.
Description
Technical field
The present invention relates to technical field of cement production, and the circulation for specifically going out mill cement selects powder system.
Background technique
Currently, cement grinding is mainly using open circuit mill and two kinds of techniques of closed circuit mill.It is finished product that material, which once passes through grinding machine,
Be known as open circuit mill, its main feature is that equipment is few, process is simple, easy to operate, cement water requirement is low, but platform produces that low, power consumption is high, water
Mud temperature is high；The fine powder that grind materials out are sub-elected returns mill as finished product, by coarse fodder part and recycles grinding again, referred to as closed circuit
Mill, its main feature is that platform produces, high, power consumption is low, cement temperatures are low, but process is complicated, cement water requirement is high.Application No. is
201621355159.6 Chinese patent discloses the half-open half-closed cement circulation of mill out of one kind and selects powder system comprising has ball milling
Machine, elevator, air conveyer flume, powder concentrator and dust-precipitator, the discharge port of ball mill, air conveyer flume, select powder at elevator
The feeding inlet of machine and ball mill is sequentially communicated, the air intake of the fine powder outlet connection dust-precipitator of powder concentrator, the discharging of dust-precipitator
End and air conveyer flume are respectively communicated with finished cement conveying device.The existing this half-open half-closed cement circulation of mill out selects powder system
System combines the advantages of open circuit mill is with closed circuit mill, and part goes out a part of mill cement as finished product, remaining to go out to grind cement through selecting
After powder machine efficient separation, thin cement powder collects another part as finished product, the thin cement powder in this part and portion through dust-precipitator
It separates mill cement mixing and is configured to finished cement, achieve the purpose that widen cement granules gradation, reduce cement water requirement.It is insufficient
Place is: grinding cement fineness fluctuation out greatly, easily causes the fineness fluctuation for preparing cement；Process for preparation does not have metrological supervision,
Configuration proportion can not be accurately adjusted, cannot get preferable finish fineness, it is unqualified to be easy to produce fineness, has much room for improvement.
Summary of the invention
The purpose of the present invention is to propose to a kind of using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, preparation
Cement products particle diameter distribution is wide, fineness is steady, partial size may be implemented and precisely prepare.
The purpose of the present invention can be achieved through the following technical solutions:
It is a kind of using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail comprising pregrinding system before raw material cabin, mill,
Ball mill and mill tail dust-precipitator.
Pregrinding system includes feed riser machine, steady feed bin, roll squeezer, discharging elevator, V-type powder concentrator before the mill
With fine powder collector before mill, the discharge end of feed riser machine is connected to the feeding end of steady feed bin, and the discharge end of roll squeezer is connected to discharging
The feeding end of bucket elevator, the feeding end of the discharge end connection V-type powder concentrator for the bucket elevator that discharges, the coarse fodder of V-type powder concentrator export, are steady
Feed bin, roll squeezer are sequentially communicated.
The discharge end of raw material cabin is connected to the feeding end for grinding the feed riser machine of preceding pregrinding system；Pregrinding system before grinding
In mill before the fine powder outlet of air inlet connection V-type powder concentrator of fine powder collector, discharge port be connected to the feeding inlet of ball mill；
The air inlet of the mill a tail wind pipe connection mill tail dust-precipitator of ball mill, the discharge port of mill tail dust-precipitator are connected to warehouse for finished product conveying pipeline.
Mill tail is double to select powder system it is characterized by also including having, the mill tail is double select powder system include grind tail elevator,
Grind tail powder concentrator, mill tail superfine powder sorting machine, mill tail fine powder dust-precipitator and mill tail superfine powder dust-precipitator.
Discharge port, the discharge end of the feeding end connection ball mill of mill tail elevator are communicated with mill tail conveying pipeline, the mill tail
Material distributing valve is equipped in the end of conveying pipeline, the end of mill tail conveying pipeline is respectively communicated with the feeding inlet for grinding tail powder concentrator and mill tail is ultra-fine
The feeding inlet of powder concentrator.
The coarse fodder outlet of tail powder concentrator is ground to the feeding inlet of ball mill, discharge port, the mill tail elevator, mill of ball mill
The feeding inlet of tail powder concentrator and ball mill mill tail material first circulation circuit in series.
The coarse fodder outlet of tail superfine powder sorting machine is ground to the feeding inlet of ball mill, discharge port, the mill tail of ball mill are promoted
Machine, the feeding inlet mill tail material second circulation circuit in series for grinding tail superfine powder sorting machine and ball mill.
The air inlet of the fine powder outlet mill tail fine powder dust-precipitator of tail powder concentrator is ground, the fine powder of mill tail superfine powder sorting machine goes out
The air inlet of mouth connection mill tail superfine powder dust-precipitator, grinds the discharge port of tail fine powder dust-precipitator, grinds the discharging of tail superfine powder dust-precipitator
Mouth is connected to warehouse for finished product conveying pipeline.
The coarse fodder outlet end of the mill tail powder concentrator is equipped with powder concentrator and returns mill coarse powder meter, grinds the thick of tail superfine powder sorting machine
Expect that outlet end is equipped with superfine powder sorting machine and returns mill coarse powder meter.
Tail fine powder dust-precipitator and mill tail superfine powder dust-precipitator are ground in the present invention to select powder dust-precipitator to substitute by 1 mill tail is double,
The double air inlets for selecting powder dust-precipitator of mill tail are separately connected fine powder outlet and the mill tail of continuous grinding tail powder concentrator by triple valve one
The fine powder of superfine powder sorting machine exports.
The discharge port that tail superfine powder dust-precipitator is ground in the present invention further can also be separately connected logical finished product by triple valve two
Library conveying pipeline and superfine cement conveying pipeline.
Prioritization scheme, the invention also includes there is 2 sets of automatic sampling sample conveying devices, the automatic sampling sample conveying device includes
Air accumulator, powder memory, powder transmitter and screwed sampler.
The powder memory is back taper shell structure, and the top of powder memory has memory feeding inlet and installs
There are inlet valve, bottom end that there is memory discharge port and outlet valve is installed, the top of powder memory is communicated with air inlet pipe.
The powder transmitter has the transmission shell portion, mixed shell portion and diffusion shell portion for successively holding docking；Sending shell portion is
The circular tube structure that is laterally arranged, its top have transmitter feeding inlet；Mixed shell portion is the circular cylinder body knot being laterally arranged
Structure, its internal diameter are less than the internal diameter for sending shell portion, send shell portion and taper narrow trumpet cylinder and the transition of mixed shell portion by internal diameter
The end of connection, the wide diffusion shell portion of the end on internal diameter flaring in mixed shell portion, diffusion shell portion has gas material mixed export；Hair
Shell portion is sent far from the closed at one end of mixed shell portion and has penetrated gas nozzle, the outlet side of the gas nozzle is located at the transmitter for sending shell portion
Below feeding inlet.
The screwed sampler is set to the top of powder memory, and the discharge port end of screwed sampler is connected to powder memory
Inlet valve, the powder memory is set to the top of powder transmitter, the outlet valve of powder memory and powder transmitter
The connection of transmitter feeding inlet；The outlet side of air accumulator by threeway tracheae be respectively communicated with powder transmitter gas nozzle inlet end and
The air inlet pipe of powder memory.
1 set of automatic sampling sample conveying device grinds the screwed sampler of tail sampling and delivery device as mill tail sampling and delivery device
Feed end connection mill tail conveying pipeline.
Another 1 set of automatic sampling sample conveying device is sampled as finished product sampling and delivery device, the spiral of finished product sampling and delivery device
The feed end of device is connected to warehouse for finished product conveying pipeline.
Advanced optimize scheme, the generator discharge port of the powder transmitter of 2 sets of automatic sampling sample conveying devices of the invention
It is connected to return pipe, the return pipe is connected to warehouse for finished product conveying pipeline, and the end of the return pipe is equipped with on-line grain size measurement
Instrument, pipe is connected to return pipe to the feed end of on-line grain size measurement instrument respectively with discharge end.
Further prioritization scheme, mill tail conveying pipeline of the invention are serially connected with scummer close to one end of mill tail elevator.
Further prioritization scheme, the air outlet of fine powder collector is connected to V-type choosing by the first blower before mill of the invention
The air inlet of powder machine, the air inlet that mill tail superfine powder sorting machine is connected to by the second blower.
The present invention has substantive distinguishing features and significant progress following prominent.
1, present invention employs mill tails pair to select powder system, and a part goes out mill cement through overground tail powder concentrator, blanking partial size mistake
Big particle, the fineness for going out mill cement (abbreviation fine powder) by its fine powder outlet output are more stable；Another part goes out to grind cement
It is thinner by cement (abbreviation superfine powder) fineness of mill out of its fine powder outlet output through overground tail superfine powder sorting machine, it is prepared therefrom
Cement-particle size distribution is wider, meets the requirement for reducing water requirement and improving intensity.
2, the present invention can pass through the aperture of adjusting material distributing valve, adjustment mill tail powder concentrator and the pan feeding for grinding tail superfine powder sorting machine
Amount ratio, and then the ratio for stablizing fine powder amount and superfine powder amount is adjusted, realize the accurate preparation of finished cement partial size.
3, the present invention fills further by the automatic sampling sample conveying device of mill tail, and by the automatic sampling sample presentation of finished product
It sets, and mill cement fineness and finished cement fineness is detected by on-line grain size measurement instrument, it is real by adjusting sub-material valve opening
Existing finished cement partial size is precisely prepared automatically.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of automatic sampling sample conveying device in the present invention.
Fig. 3 is another structural schematic diagram of the invention.
Fig. 4 is another structural schematic diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Embodiment 1
It is a kind of using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail with reference to Fig. 1 and Fig. 2 comprising raw material cabin 1,
Pregrinding system, ball mill 4, mill tail dust-precipitator 41, mill tail pair select powder system and 2 sets of automatic sampling sample conveying devices before grinding.
Pregrinding system includes feed riser machine 20, steady feed bin 22, roll squeezer 23, discharging elevator 2, V before the mill
Fine powder collector 3 before type powder concentrator 21 and mill, the discharge end of feed riser machine 20 are connected to the feeding end of steady feed bin 22, roll squeezer 23
Discharge end connection discharging bucket elevator 2 feeding end, discharging bucket elevator 2 discharge end connection V-type powder concentrator 21 feeding end, V
The coarse fodder outlet of type powder concentrator 21, steady feed bin 22, roll squeezer 23 are sequentially communicated.
The discharge end of raw material cabin 1 is connected to the feeding end for grinding the feed riser machine 20 of preceding pregrinding system；Pre- grinding before grinding
The fine powder outlet of the air inlet connection V-type powder concentrator 21 of fine powder collector 3, discharge port are connected to ball mill 4 before mill in system
Feeding inlet；The air inlet of the mill a tail wind pipe connection mill tail dust-precipitator 41 of ball mill 4, the discharge port of mill tail dust-precipitator 41 are connected to
Warehouse for finished product conveying pipeline 10.
The mill tail is double to select powder system to include mill tail elevator 42, mill tail powder concentrator 5, mill tail superfine powder sorting machine 6, grind tail
Fine powder dust-precipitator 51 and mill tail superfine powder dust-precipitator 61.
Discharge port, the discharge end of the feeding end connection ball mill 4 of mill tail elevator 42 are communicated with mill tail conveying pipeline 40, grind tail
Conveying pipeline 40 is serially connected with scummer 44 close to one end of mill tail elevator 42, is equipped with material distributing valve 43 in end, mill tail conveying pipeline 40
End be respectively communicated with mill tail powder concentrator 5 feeding inlet and mill tail superfine powder sorting machine 6 feeding inlet.
The coarse fodder outlet of tail powder concentrator 5 is ground to the feeding inlet of ball mill 4, discharge port, the mill tail elevator of ball mill 4
42, the feeding inlet mill tail material first circulation circuit in series of tail powder concentrator 5 and ball mill 4 is ground.
The coarse fodder outlet of tail superfine powder sorting machine 6 is ground to the feeding inlet of ball mill 4, discharge port, the mill tail of ball mill 4 mention
The feeding inlet mill tail material second circulation circuit in series for rising machine 42, grinding tail superfine powder sorting machine 6 and ball mill 4.
The air inlet for grinding the fine powder outlet mill tail fine powder dust-precipitator 51 of tail powder concentrator 5, grinds the thin of tail superfine powder sorting machine 6
Powder outlet grinds the air inlet of tail superfine powder dust-precipitator 61, grinds the discharge port of tail fine powder dust-precipitator 51, mill tail superfine powder is gathered dust
The discharge port of device 61 is connected to warehouse for finished product conveying pipeline 10.
The coarse fodder outlet end of the mill tail powder concentrator 5 is equipped with powder concentrator and returns mill coarse powder meter 50, grinds tail superfine powder sorting machine 6
Coarse fodder outlet end be equipped with superfine powder sorting machine return mill coarse powder meter 60.
The air outlet of fine powder collector 3 is connected to V-type by the first blower 31 and selects powder before grinding in pregrinding system before the mill
The air inlet of machine 21, the air inlet that mill tail superfine powder sorting machine 6 is connected to by the second blower 32.
The automatic sampling sample conveying device includes air accumulator 7, powder memory 8, powder transmitter 9 and screwed sampler
80。
The powder memory 8 is back taper shell structure, and the top of powder memory 8 has memory feeding inlet and pacifies
There is memory discharge port equipped with inlet valve 81, bottom end and outlet valve 82 is installed, the top of powder memory 8 is communicated with air inlet
Pipe 83.
The powder transmitter 9 has the transmission shell portion 91, mixed shell portion 92 and diffusion shell portion 93 for successively holding docking；It sends
Shell portion 91 is the circular tube structure being laterally arranged, its top with transmitter feeding inlet；Mixed shell portion 92 is laterally arranged
Circular tube structure, its internal diameter are less than the internal diameter for sending shell portion 91, send shell portion 91 and taper narrow trumpet cylinder by internal diameter
It is connect with 92 transition of mixed shell portion, the wide diffusion shell portion 93 of the end on internal diameter flaring in mixed shell portion 92, diffusion shell portion 93
End has gas material mixed export；It sends shell portion 91 and far from the closed at one end of mixed shell portion 92 and has penetrated gas nozzle 94, the gas
The outlet side of mouth 94 is located at below the transmitter feeding inlet for sending shell portion 91.
The screwed sampler 80 is set to the top of powder memory 8, and the discharge port end of screwed sampler 80 is connected to powder
The inlet valve 81 of memory 8, the powder memory 8 are set to the top of powder transmitter 9, the outlet valve 82 of powder memory 8
It is connected to the transmitter feeding inlet of powder transmitter 9；The outlet side of air accumulator 7 is respectively communicated with powder transmitter by threeway tracheae
The inlet end of 9 gas nozzle 94 and the air inlet pipe 83 of powder memory 8.
1 set of automatic sampling sample conveying device grinds the screwed sampler of tail sampling and delivery device as mill tail sampling and delivery device
80 feed end connection mill tail conveying pipeline 40.
Another 1 set of automatic sampling sample conveying device is sampled as finished product sampling and delivery device, the spiral of finished product sampling and delivery device
The feed end of device 80 is connected to warehouse for finished product conveying pipeline 10.
The generator discharge port of the powder transmitter 9 of 2 sets of automatic sampling sample conveying devices is connected to return pipe 100, and described time
Flow tube 100 is connected to warehouse for finished product conveying pipeline 10, and the end of the return pipe 100 is equipped with on-line grain size measurement instrument 101, online grain
Pipe is connected to return pipe 100 to the feed end of degree detector 101 respectively with discharge end.
In the cement grinding system operational process of the present embodiment, the flow direction of material is as follows.
1, cement raw material by pregrinding system before 1 → feed riser of raw material cabin machine 20 → mill steady 22 → roll squeezer of feed bin 23
→ discharging 2 → V-type of elevator powder concentrator 21, after V-type powder concentrator 21 selects powder, before the coarse fodder outlet discharge mill of V-type powder concentrator 21
Coarse fodder → steady feed bin 22 → roll squeezer, 23 → discharging, 2 → V-type of elevator powder concentrator 21, before realizing mill by pregrinding system before grinding
The circulation of coarse fodder selects powder.
2,3 → ball mill of fine powder collector 4 before fine powder outlet → mill of V-type powder concentrator 21.
3, after 4 grinding of ball mill, discharge port → mill tail elevator 42 → mill 40 → scummer of tail conveying pipeline of ball mill 4
44, regulation material distributing valve 43 makes mill tailing be divided into two-way:
A part mill tailing → mill tail powder concentrator 5 → mill tail fine powder 51 → warehouse for finished product of dust-precipitator conveying pipeline 10, as finished cement
Fine powder component.
Another part grinds tailing → mill tail superfine powder sorting machine 6 → mill tail superfine powder 61 → warehouse for finished product of dust-precipitator conveying pipeline 10,
Ultra-fine powder component as finished cement.
It grinds the coarse fodder outlet discharge coarse powder of the thin powder concentrator 5 of tail and grinds the coarse fodder outlet discharge coarse powder of tail superfine powder sorting machine 6
→ ball mill 4, again through 4 grinding of ball mill.
By the present embodiment cement grinding system prepare finished cement include grind tail powder concentrator 5 sub-elect fine powder,
And the superfine powder that mill tail superfine powder sorting machine 6 sub-elects, by regulating and controlling the aperture of material distributing valve 43, adjustment mill tail powder concentrator 5 and mill
The feeding ratio of tail superfine powder sorting machine 6, and then the ratio of fine powder amount and superfine powder amount is adjusted, realize that finished cement partial size is prepared
And the purpose of regulation.
In the cement grinding system of the present embodiment, powder concentrator is respectively adopted and returns mill coarse powder meter 50, superfine powder sorting machine time
Coarse powder meter 60 is ground, is measured and is calculated yield to the road system Zhong Ge powder, grasp the yield of each road powder in real time, so as to
The reason of analyzing finish fineness variation, takes timely measure.
In cement grinding system operational process, by automatic sampling sample conveying device, by screwed sampler 80 by conveying pipeline
On material be transported in powder memory 8 through inlet valve 81, when the operation of screwed sampler 80 to setting time or powder stores
When material position reaches requirement in device 8, stop sampling.Dry compressed gas is deposited through inlet end 83 into powder respectively by air accumulator 7
Reservoir 8 and through gas nozzle 94 enter powder transmitter 9 in, the compressed gas for being mixed with the drying of sample is conveyed by powder transmitter 9
To return pipe 100, material size is detected by on-line grain size measurement instrument 101 when flowing through return pipe 100, material continues on through back
Flow tube 100 returns to finished product conveying pipeline.
Wherein by automatic sampling sample conveying device, opposite grinding tailing and finished product are sampled sample presentation respectively, by on-line detector
101 detection real-time monitorings.There are fineness abnormal conditions to be analyzed in time, and adjust 43 aperture of material distributing valve, it is ensured that finish fineness
It meets the requirements.
Embodiment 2
With reference to Fig. 3, the cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair of the present embodiment, with embodiment 1
Difference is: the double mill tail fine powder dust-precipitators 51 for selecting powder system of mill tail and mill tail superfine powder dust-precipitator 61 are double by 1 mill tail
Powder dust-precipitator 500 is selected to substitute, the double air inlets for selecting powder dust-precipitator 500 of mill tail are separately connected continuous grinding by triple valve 1
The fine powder of tail powder concentrator 5 exports and the fine powder outlet of mill tail superfine powder sorting machine 6.Other structures are identical as embodiment 1.This implementation
The superfine powder that the fine powder and mill tail superfine powder sorting machine 6 that mill tail powder concentrator 5 sub-elects in example sub-elect is using the double choosings of a mill tail
Powder dust-precipitator 500 is collected and mixes, and has reduction mill tail is double to select powder system number of devices and investment, fine powder and superfine powder mixed
Close uniform feature.
Embodiment 3
With reference to Fig. 4, the cement grinding systems for selecting powder to realize that partial size is prepared using mill tail pair of the present embodiment, with embodiment 1
Difference is: the discharge port of the mill tail superfine powder dust-precipitator 61 is separately connected logical warehouse for finished product conveying pipeline by triple valve 2 601
10 and superfine cement conveying pipeline 600.Superfine powder a part that the mill tail superfine powder sorting machine 6 of the present embodiment sub-elects can be by ultra-fine
Cement conveying pipeline 600 is exported directly as superfine cement finished product.By the aperture of regulating three-way valve 2 601 adjust superfine cement at
The output quantity of product.
Claims (7)
1. a kind of cement grinding systems for selecting powder to realize that partial size is prepared using tail pair is ground comprising raw material cabin (1) grinds preceding pre- grinding
System, ball mill (4) and mill tail dust-precipitator (41)；
Pregrinding system includes feed riser machine (20), steady feed bin (22), roll squeezer (23), discharging elevator before the mill
(2), V-type powder concentrator (21) and the preceding fine powder collector (3) of mill, the discharge end of feed riser machine (20) are connected to entering for steady feed bin (22)
Expect end, the discharge end of the feeding end of discharge end connection discharging bucket elevator (2) of roll squeezer (23), discharging bucket elevator (2) is connected to V-type
The feeding end of powder concentrator (21), the coarse fodder outlet of V-type powder concentrator (21), steady feed bin (22), roll squeezer (23) are sequentially communicated；
The discharge end of raw material cabin (1) is connected to the feeding end for grinding the feed riser machine (20) of preceding pregrinding system；Pre- grinding before grinding
The fine powder outlet of air inlet connection V-type powder concentrator (21) of fine powder collector (3) before mill in system, discharge port are connected to ball milling
The feeding inlet of machine (4)；The air inlet of mill a tail wind pipe connection mill tail dust-precipitator (41) of ball mill (4), mill tail dust-precipitator (41)
Discharge port is connected to warehouse for finished product conveying pipeline (10)；
Mill tail is double to select powder system it is characterized by also including having, the mill tail is double select powder system include grind tail elevator (42),
Grind tail powder concentrator (5), mill tail superfine powder sorting machine (6), mill tail fine powder dust-precipitator (51) and mill tail superfine powder dust-precipitator (61)；
Discharge port, the discharge end of feeding end connection ball mill (4) of mill tail elevator (42) are communicated with mill tail conveying pipeline (40), institute
It states in the end of mill tail conveying pipeline (40) and is equipped with material distributing valve (43), the end of mill tail conveying pipeline (40) is respectively communicated with mill tail powder concentrator
(5) feeding inlet of feeding inlet and mill tail superfine powder sorting machine (6)；
The coarse fodder outlet of tail powder concentrator (5) is ground to the feeding inlet of ball mill (4), discharge port, the mill tail of ball mill (4) are promoted
Machine (42), the feeding inlet mill tail material first circulation circuit in series for grinding tail powder concentrator (5) and ball mill (4)；
The coarse fodder outlet of tail superfine powder sorting machine (6) is ground to the feeding inlet of ball mill (4), discharge port, the mill tail of ball mill (4)
Elevator (42), the feeding inlet mill tail material second circulation circuit in series for grinding tail superfine powder sorting machine (6) and ball mill (4)；
The air inlet of fine powder outlet mill tail fine powder dust-precipitator (51) of tail powder concentrator (5) is ground, mill tail superfine powder sorting machine (6)
Fine powder outlet grinds the air inlet of tail superfine powder dust-precipitator (61), and discharge port, the mill tail for grinding tail fine powder dust-precipitator (51) are ultra-fine
The discharge port of powder dust-precipitator (61) is connected to warehouse for finished product conveying pipeline (10)；
The coarse fodder outlet end of mill tail powder concentrator (5) is equipped with powder concentrator and returns mill coarse powder meter (50), grinds tail superfine powder sorting machine
(6) coarse fodder outlet end is equipped with superfine powder sorting machine and returns mill coarse powder meter (60).
2. according to claim 1 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is characterised in that:
The mill tail fine powder dust-precipitator (51) and mill tail superfine powder dust-precipitator (61) select powder dust-precipitator (500) substitution, institute by 1 mill tail is double
State the fine powder that the double air inlets for selecting powder dust-precipitator (500) of mill tail are separately connected continuous grinding tail powder concentrator (5) by triple valve one (501)
The outlet of the fine powder of outlet and mill tail superfine powder sorting machine (6).
3. according to claim 1 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is characterised in that:
It is described mill tail superfine powder dust-precipitator (61) discharge port by triple valve two (601) be separately connected logical warehouse for finished product conveying pipeline (10) and
Superfine cement conveying pipeline (600).
4. it is according to claim 1 or 2 or 3 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is special
Sign is: further including having 2 sets of automatic sampling sample conveying devices, the automatic sampling sample conveying device includes that air accumulator (7), powder are deposited
Reservoir (8), powder transmitter (9) and screwed sampler (80)；
The powder memory (8) is back taper shell structure, and the top of powder memory (8) has memory feeding inlet and pacifies
There is memory discharge port equipped with inlet valve (81), bottom end and be equipped with outlet valve (82), the top connection of powder memory (8)
There are air inlet pipe (83)；
The powder transmitter (9) has the transmission shell portion (91), mixed shell portion (92) and diffusion shell portion (93) for successively holding docking；
Sending shell portion (91) is the circular tube structure being laterally arranged, its top with transmitter feeding inlet；Mixed shell portion (92) is cross
It is less than circular tube structure from the internal diameter for sending shell portion (91) to setting, its internal diameter, transmission shell portion (91) tapers narrow by internal diameter
Trumpet cylinder connect with mixed shell portion (92) transition, the wide diffusion shell portion of the end on internal diameter flaring of mixed shell portion (92)
(93), the end of diffusion shell portion (93) has gas material mixed export；Send the end seal of shell portion (91) far from mixed shell portion (92)
It closes and has penetrated gas nozzle (94), the outlet side of the gas nozzle (94) is located at below the transmitter feeding inlet for sending shell portion (91)；
The screwed sampler (80) is set to the top of powder memory (8), and the discharge port end of screwed sampler (80) is connected to powder
Expect the inlet valve (81) of memory (8), the powder memory (8) is set to the top of powder transmitter (9), powder memory
(8) outlet valve (82) is connected to the transmitter feeding inlet of powder transmitter (9)；The outlet side of air accumulator (7) passes through three ventilations
Pipe is respectively communicated with the inlet end of the gas nozzle (94) of powder transmitter (9) and the air inlet pipe (83) of powder memory (8)；
1 set of automatic sampling sample conveying device grinds the screwed sampler (80) of tail sampling and delivery device as mill tail sampling and delivery device
Feed end connection mill tail conveying pipeline (40)；
Another 1 set of automatic sampling sample conveying device is as finished product sampling and delivery device, the screwed sampler of finished product sampling and delivery device
(80) feed end is connected to warehouse for finished product conveying pipeline (10).
5. according to claim 4 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is characterised in that:
The generator discharge port of the powder transmitter (9) of 2 sets of automatic sampling sample conveying devices is connected to return pipe (100), the return pipe
(100) it being connected to warehouse for finished product conveying pipeline (10), the end of the return pipe (100) is equipped with on-line grain size measurement instrument (101),
Pipe is connected to return pipe (100) to the feed end of line granularity Detection instrument (101) respectively with discharge end.
6. it is according to claim 1 or 2 or 3 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is special
Sign is: mill tail conveying pipeline (40) is serially connected with scummer (44) close to one end of mill tail elevator (42).
7. it is according to claim 1 or 2 or 3 using the double cement grinding systems for selecting powder to realize that partial size is prepared of mill tail, it is special
Sign is: the air outlet of fine powder collector (3) passes through the air inlet of the first blower (31) connection V-type powder concentrator (21), leads to before grinding
Cross the air inlet of the second blower (32) connection mill tail superfine powder sorting machine (6).
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