CN201990603U - Cement close-circuit powder grinding system - Google Patents
Cement close-circuit powder grinding system Download PDFInfo
- Publication number
- CN201990603U CN201990603U CN2011201270531U CN201120127053U CN201990603U CN 201990603 U CN201990603 U CN 201990603U CN 2011201270531 U CN2011201270531 U CN 2011201270531U CN 201120127053 U CN201120127053 U CN 201120127053U CN 201990603 U CN201990603 U CN 201990603U
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- Prior art keywords
- skewed slot
- cement
- powder
- dust
- precipitator
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Abstract
The utility model relates to a cement close-circuit powder grinding system which comprises a cement grinding machine, a separator and a dust collector that are arranged from the top down, wherein a discharge conveying inclined slot and a bucket elevator are arranged at a discharge hole of the cement grinding machine; a separation conveying inclined slot is arranged at a feed hole of the separator; a fine powder outlet of the separator is connected with an inlet of the dust collector; a coarse powder feeding back inclined slot is arranged at a coarse powder outlet of the separator; a discharge hole of the inclined slot is communicated with a feed hole of the cement grinding machine; an outlet of the dust collector is provided with a draught fan; a discharge powder material is elevated to the separation conveying inclined slot by the elevator, and enters the separator through the inclined slot; the fine powder separated by the separator enters the dust collector to obtain a product, and the separated coarse powder returns to the cement grinding machine for regrinding through the coarse powder feeding back inclined slot; the separation conveying inclined slot has a branched inclined slot, and the inclined slot is connected with the inlet of the dust collector, so as to lead the partial discharge powder material to directly enter the dust collector without separating, thereby adjusting the grain composition of the finished product of cement.
Description
Technical field
The utility model relates to the cement grinding system, relates in particular to a kind of cement closed-circuit grinding system.
Background technology
Cement grinding is divided into open-circuit grinding and closed-circuit grinding, open-circuit grinding system cement size distribution broad, and particle packing is tightr, and is better to improving cement performance and concrete performance, but mill efficiency is lower; The size distribution of closed-circuit grinding system is narrow than open-circuit grinding, it is not quite reasonable that the cement granules grating distributes, but mill efficiency is higher, relatively poor to improving cement performance and concrete performance, how to improve its grain composition, the acquisition optimum size distributes, and very important effect is arranged in the closed-circuit grinding system cement production.
Cement grinding process present situation and development trend are made a general survey of modern cement grinding process, the combination grinding system process that the overwhelming majority adopts, after material passes through roll squeezer or the pre-grinding of Vertical Mill, the fines that filters out enters ball mill and carries out whole grinding, by powder separating machine and dust-precipitator satisfactory finished product is selected.Add the requirement of the ISO method of inspection and new standard, the check of cement fineness adopts the Blain specific surface instrument to measure cement specific surface area, cause cement production enterprise to reach the new standard requirement in order to make every effort to the finished product mechanical property, reduce cost, mix excessively or mix more blended material cause cement in mill repeatedly grinding to select the finished particle grating unreasonable.
Cement fineness not only is related to the energy consumption of cement grinding, and what is more important has very big influence to cement performance.High grade cement: standard consistency is low, good, the far away age strength height of concrete admixture consistency, help improving durability of concrete; Unreasonable as the finished cement grain composition, both be unfavorable for the raising of cement use properties, reduce output again, improved energy consumption, the utmost point is unfavorable for the control of cost.Grating, grog and the subsidiary material of the kind of the adjustment blending material that existing most of cement production enterprise all adopts, lining board of grinder, grinding element grinding etc. are respectively adjusted, and adjustment cycle is long, and complex operation and effect demonstration cycle are long, are unfavorable for controlling.
Summary of the invention
At the problems referred to above, the utility model proposes a kind of cement closed-circuit grinding system, produce cement with this system, not only have the closed-circuit grinding system advantage of low energy consumption, can obtain rational size distribution again, system is suitable with open-circuit grinding.
The technical solution of the utility model is as follows:
A kind of cement closed-circuit grinding system, comprise cement mill, powder separating machine, dust-precipitator that little-endian is disposed in order, the discharge port of described cement mill is furnished with out mill and carries skewed slot and chapelet, the opening for feed of described powder separating machine is furnished with and selects powder to carry skewed slot, the fine powder outlet of powder separating machine is by the import of pipe connection dust-precipitator, the meal outlet of powder separating machine is furnished with meal feed back skewed slot, and the feed opening of this skewed slot is communicated with the opening for feed of cement mill; The venting port of described dust-precipitator is furnished with induced draft fan; To go out the abrasive dust material by lift and be promoted to and select powder to carry skewed slot, enter powder separating machine through this skewed slot; The fine powder of telling through powder separating machine enters dust-precipitator, obtains product, and the meal of telling returns cement mill through meal feed back skewed slot and refaces; The described powder that selects carries skewed slot to have branch's skewed slot, and this branch's skewed slot connects the import of dust-precipitator, and make part go out the abrasive dust material and just directly enter dust-precipitator without the choosing branch, thus the grain composition of regulating finished cement.
Described branch skewed slot is provided with flow control valve.
Described branch skewed slot also is provided with hand sluice valve.
The beneficial effects of the utility model:
The utility model increases by branch's skewed slot by the conveying skewed slot appropriate location at powder separating machine, adjust the inventory that enters dust-precipitator by adjusting branch's skewed slot electric flow valve size, thereby regulate finished product cement granules grating, can reach the equal effect of open-circuit grinding system, guaranteed quality product, keep the low advantage of closed-circuit grinding system energy consumption again, reduced production cost.
Of the present utility model simple in structure, the technological transformation cost is little, easy and simple to handle, and can in time adjust arbitrarily according to the cement performance needs, is easy to control, and is very practical.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Referring to Fig. 1: this cement closed-circuit grinding system, comprise cement mill 1, powder separating machine 5, dust-precipitator 6 that little-endian is disposed in order, the discharge port of described cement mill 1 is furnished with out mill and carries skewed slot 2 and chapelet 3, and the hopper of chapelet 3 is by motor M
5Drive; Described powder separating machine 5 is by motor M
8Drive, its opening for feed is furnished with and selects powder to carry skewed slot 4, and its fine powder outlet is by the import of pipe connection dust-precipitator, and its meal outlet is furnished with meal feed back skewed slot 11, and the feed opening of this meal feed back skewed slot 11 is communicated with the opening for feed of cement mill 1.Powder separating machine 5 is wind inlet and secondary air import once, and wherein primary air intake pipe is provided with wind variable valve 12 one time, and this valve is a motorized valve, by motor M
3Drive, the choosing that is used to regulate material divides particle diameter.
Described dust-precipitator adopts the bag filter 6 of cloth bag constructions, and its venting port is furnished with dust-precipitator induced draft fan 7, and the import of dust-precipitator induced draft fan 7 is provided with air inducing adjustable valve 13, and this valve is a motorized valve, by motor M
9Drive.
Above-mentioned each skewed slot is furnished with gas blower and drive-motor thereof respectively, and wherein, the gas blower that goes out mill conveying skewed slot 2 is F
1, drive-motor is M
2Selecting powder to carry the gas blower of skewed slot 4 is F
2, drive-motor is M
4The gas blower of meal feed back skewed slot 11 is F
4, drive-motor is M
1
Characteristics of the present utility model are: selecting powder to carry skewed slot 4 to have additional branch's skewed slot 8, this branch's skewed slot 8 directly is communicated with bag filter 6, and the gas blower of branch's skewed slot 8 is F
3, drive-motor is M
7Branch's skewed slot 8 is furnished with electric flow valve 9, hand sluice valve 10, and electric flow valve 9 is used for regulating the powder flow of branch's skewed slot 8, by motor M
6Drive, improve the cement energy level of a particle of a quantize and join, turn-off branch's skewed slot 8 when hand sluice valve 10 is used to overhaul.
Working process of the present utility model is, will go out the abrasive dust material by chapelet 3 and be promoted to and select powder to carry skewed slot 4, enters powder separating machine 5 through this skewed slot 4; The fine powder of telling through powder separating machine 5 enters bag filter 6, obtains product, and the meal of telling returns cement mill 1 through meal feed back skewed slot 11 and refaces; The described powder that selects carries skewed slot 4 to have branch's skewed slot 8, and this skewed slot 8 connects the import of bag filter 6, and make part go out the abrasive dust material and just directly enter bag filter 6 without the choosing branch, thus the grain composition of regulating finished cement.
Increase before branch's skewed slot 8, work in-process cement is all through selecting powder to carry skewed slot 4 to enter powder separating machine 5, disperse completely, separation, enter dust-precipitator after qualified and collect through powder separating machine 5, the cement products size distribution is concentrated unreasonable, causes the use properties of cement concrete to reduce.The utility model simply selects powder to carry skewed slot 4 to increase branch's skewed slot 8 above powder separating machine 5, makes part directly enter dust-precipitator 6 without the powder that choosing divides, and adjusts the cement granules grating, only needs to regulate the aperture of electric flow valve, i.e. powder flow according to producing needs.Operation easily has effect preferably to improving cement product quality.
Claims (3)
1. cement closed-circuit grinding system, comprise cement mill, powder separating machine, dust-precipitator that little-endian is disposed in order, the discharge port of described cement mill is furnished with out mill and carries skewed slot and chapelet, the opening for feed of described powder separating machine is furnished with and selects powder to carry skewed slot, the fine powder outlet of powder separating machine is by the import of pipe connection dust-precipitator, the meal outlet of powder separating machine is furnished with meal feed back skewed slot, and the feed opening of this skewed slot is communicated with the opening for feed of cement mill; The venting port of described dust-precipitator is furnished with induced draft fan; To go out the abrasive dust material by lift and be promoted to and select powder to carry skewed slot, enter powder separating machine through this skewed slot; The fine powder of telling through powder separating machine enters dust-precipitator, obtains product, and the meal of telling returns cement mill through meal feed back skewed slot and refaces; It is characterized in that: the described powder that selects carries skewed slot to have branch's skewed slot, and this branch's skewed slot connects the import of dust-precipitator, makes part go out the abrasive dust material and just directly enters dust-precipitator, the grain composition of regulating finished cement without the choosing branch.
2. cement closed-circuit grinding system according to claim 1 is characterized in that: described branch skewed slot is provided with flow control valve.
3. cement closed-circuit grinding system according to claim 2 is characterized in that: described branch skewed slot is provided with hand sluice valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201270531U CN201990603U (en) | 2011-04-25 | 2011-04-25 | Cement close-circuit powder grinding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201270531U CN201990603U (en) | 2011-04-25 | 2011-04-25 | Cement close-circuit powder grinding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201990603U true CN201990603U (en) | 2011-09-28 |
Family
ID=44667097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201270531U Expired - Lifetime CN201990603U (en) | 2011-04-25 | 2011-04-25 | Cement close-circuit powder grinding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201990603U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698853A (en) * | 2012-06-25 | 2012-10-03 | 张少明 | New vertical mill grinding device |
| CN103285994A (en) * | 2013-05-22 | 2013-09-11 | 南通三鑫重工机械有限公司 | Powder grading method |
| CN103285986A (en) * | 2013-05-22 | 2013-09-11 | 江苏新业重工股份有限公司 | Powder grading device |
| CN103285995A (en) * | 2013-05-22 | 2013-09-11 | 南通三鑫重工机械有限公司 | Material grading method |
| CN104407573A (en) * | 2014-09-30 | 2015-03-11 | 济南大学 | Automatic control system suitable for closed-circuit cement combined grinding and method thereof |
| CN112354662A (en) * | 2020-10-20 | 2021-02-12 | 江苏吉达机械制造有限公司 | Double-closed-circuit internal circulation grinding process |
-
2011
- 2011-04-25 CN CN2011201270531U patent/CN201990603U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698853A (en) * | 2012-06-25 | 2012-10-03 | 张少明 | New vertical mill grinding device |
| CN103285994A (en) * | 2013-05-22 | 2013-09-11 | 南通三鑫重工机械有限公司 | Powder grading method |
| CN103285986A (en) * | 2013-05-22 | 2013-09-11 | 江苏新业重工股份有限公司 | Powder grading device |
| CN103285995A (en) * | 2013-05-22 | 2013-09-11 | 南通三鑫重工机械有限公司 | Material grading method |
| CN104407573A (en) * | 2014-09-30 | 2015-03-11 | 济南大学 | Automatic control system suitable for closed-circuit cement combined grinding and method thereof |
| CN112354662A (en) * | 2020-10-20 | 2021-02-12 | 江苏吉达机械制造有限公司 | Double-closed-circuit internal circulation grinding process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |
|
| CX01 | Expiry of patent term |