CN115970850A - Method for re-selecting returned powder of dynamic powder selecting machine of grinding system - Google Patents
Method for re-selecting returned powder of dynamic powder selecting machine of grinding system Download PDFInfo
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- CN115970850A CN115970850A CN202310075258.7A CN202310075258A CN115970850A CN 115970850 A CN115970850 A CN 115970850A CN 202310075258 A CN202310075258 A CN 202310075258A CN 115970850 A CN115970850 A CN 115970850A
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- 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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Abstract
The invention discloses a grinding system and a grinding method, wherein the system comprises a V-shaped powder selecting machine, a first dynamic powder selecting machine, a roller press and a secondary sorting device for further screening coarse powder output by the first dynamic powder selecting machine. In the method, after coarse powder output by the first dynamic powder concentrator is further screened by the secondary sorting device, the screened coarse powder and the coarse powder output by the V-shaped powder concentrator are converged and conveyed to a roller press to be extruded, and fine powder enters the V-shaped powder concentrator. The coarse powder returned by the first dynamic powder concentrator is re-sorted, so that the content of the fine powder entering the roller press can be reduced, the moisture and the temperature of the coarse powder entering the roller press are reduced, and the stable and efficient operation of the roller press is facilitated.
Description
Technical Field
The invention relates to the technical field of grinding, in particular to a method for re-separating returned powder of a dynamic powder separator of a grinding system.
Background
The conventional grinding system is shown in fig. 1, and comprises a V-shaped powder concentrator 12, a roller press 3 and a first dynamic powder concentrator 6, wherein fresh materials enter a feed inlet of the V-shaped powder concentrator 12 through a belt 11, the V-shaped powder concentrator 12 performs coarse separation on the fresh materials, coarse powder obtained by separation falls into a coarse powder outlet at the bottom of the V-shaped powder concentrator 12, the coarse powder enters a circulating bucket elevator 1 through a pipeline from a coarse powder outlet of the V-shaped powder concentrator 12, and is sent into a small bin 2 above an inlet of the roller press 3 through the circulating bucket elevator 1, coarse powder sent into the small bin 2 in the roller press 3 is extruded to form a cake, the cake is sent into a cake bucket elevator 4 through an outlet of the roller press, and then is sent into a feed inlet of the V-shaped powder concentrator 12 through the cake bucket elevator 4, and a cycle is completed.
And the fine powder obtained by the separation of the V-shaped powder selector 12 enters the first dynamic powder selector 6 from the outlet of the V-shaped powder selector 12, fine classification is carried out in the first dynamic powder selector 6, qualified finished products obtained by classification enter the finished product collecting device 8 from the outlet of the first dynamic powder selector 6, and the collected finished products fall into the air chute 10 by the first air locking device 7 and are output outwards. Coarse powder obtained by classification of the first dynamic powder concentrator 6 enters the second air locking device 5 from a coarse powder outlet of the first dynamic powder concentrator 6 through a pipeline, is converged with the coarse powder output by the V-shaped powder concentrator 12 from the second air locking device 5 through the pipeline, is output to the circulating bucket elevator 1, and is sent to the small bin 2 through the circulating bucket elevator 1. Air is supplied to the whole system by a circulating fan 9, and cold air is introduced into the V-shaped powder concentrator 12 through a cold air valve 13.
The grinding system has the problems that in the working process of the powder concentrator, due to the influences of structural design, working conditions, on-site actual conditions and the like, more qualified fine powder often exists in coarse powder returned by the first dynamic powder concentrator 6, the fine powder of the part not only directly reduces the yield, but also is more remarkable in that the fine powder of the part has serious harm to the stable operation of the roller press 3, the fluctuation of a roller gap of the roller press 3 is easily caused, further the reliable operation of a roller press 3 body and a hydraulic system can be adversely affected, and finally the reduction of the system yield and the increase of energy consumption can be aggravated due to the unstable operation of the roller press 3.
Disclosure of Invention
The invention provides a grinding system and a grinding method, and aims to solve the problems that a roller press is unstable in operation, the system yield is reduced and the system energy consumption is increased due to excessive fine powder in coarse powder of a first dynamic powder selector in the conventional grinding system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the grinding system comprises a V-shaped powder concentrator, a first dynamic powder concentrator and a roller press, wherein the outlet of the V-shaped powder concentrator is connected with the inlet of the first dynamic powder concentrator, the coarse powder outlet of the V-shaped powder concentrator is connected with the inlet of the roller press, the outlet of the roller press is connected with the feed inlet of the V-shaped powder concentrator, the grinding system also comprises a secondary sorting device, the coarse powder outlet of the first dynamic powder concentrator is connected with the feed inlet of the secondary sorting device, and the coarse powder outlet of the secondary sorting device and the coarse powder of the V-shaped powder concentrator converge to enter the roller press.
Further, a fine powder outlet of the secondary separation device is connected with an inlet or an outlet of the V-shaped powder separator.
Further, the secondary sorting device is a static powder sorting machine.
Further, the secondary separation device is a second dynamic powder concentrator.
A grinding system and a grinding method are provided, wherein coarse powder output by a first dynamic powder selector is further screened by a secondary sorting device, and the coarse powder screened by the secondary sorting device and the coarse powder output by a V-shaped powder selector are converged and conveyed to a roller press.
The coarse powder returned by the first dynamic powder concentrator is re-sorted, so that the content of fine powder entering the roller press can be reduced, the moisture and the temperature of the coarse powder entering the powder concentrator in the roller press are reduced, the stable and efficient operation of the roller press is facilitated, and the problems of reduction of system yield and increase of energy consumption caused by excessive fine powder in the powder concentrator are solved.
Drawings
Fig. 1 is a schematic view of a conventional pulverizing system.
Fig. 2 is a schematic diagram of a grinding system using a static powder concentrator according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a grinding system using a second dynamic powder concentrator according to an embodiment of the present invention.
Detailed description of the preferred embodiments
The invention is further illustrated by the following examples in conjunction with the drawings.
As shown in fig. 2, the present embodiment discloses a grinding system and a grinding method, including a V-shaped powder selector 12, a roller press 3, a first dynamic powder selector 6, and a secondary sorting device.
Fresh materials enter a feeding hole of a V-shaped powder concentrator 12 through a belt 11, the V-shaped powder concentrator 12 roughly separates the fresh materials, coarse powder obtained through separation falls into a coarse powder outlet at the bottom of the V-shaped powder concentrator 12, the coarse powder outlet at the bottom of the V-shaped powder concentrator 12 is connected with a circulating bucket elevator 1 through a pipeline, a small bin 2 at the inlet of a roller press 3 is connected with the circulating bucket elevator 1 through a pipeline, the coarse powder output by the V-shaped powder concentrator 12 is sent into the roller press 3 through the circulating bucket elevator 1, and the coarse powder is extruded in the roller press 3 to form a cake. The outlet of the roller press 3 is connected with the cake bucket lifter 4 through a pipeline, the feed inlet of the V-shaped powder concentrator 12 is connected with the cake bucket lifter 4 through a pipeline, and the cake output by the roller press 3 is sent into the V-shaped powder concentrator 12 through the cake bucket lifter 4, so that one circulation is completed.
The outlet of the V-shaped powder concentrator 12 is connected with the inlet of the first dynamic powder concentrator 6 through a pipeline, so that the fine powder separated by the V-shaped powder concentrator 12 enters the first dynamic powder concentrator 6 and is finely classified in the first dynamic powder concentrator 6.
The outlet of the first dynamic powder concentrator 6 is connected with a finished product collecting device 8, the finished product collecting device 8 is connected with an air chute 10 through a first air locking device 7, qualified finished products obtained by grading of the first dynamic powder concentrator 6 enter the finished product collecting device 8, and finally fall into the air chute 10 through the first air locking device 7 to be output outwards after being collected by the finished product collecting device 8.
The coarse powder outlet of the first dynamic powder concentrator 6 is connected with the feed inlet of the secondary sorting device through the second air locking device 5, in this embodiment, the secondary sorting device adopts a static powder concentrator 15, the air inlet of the static powder concentrator 15 introduces cold air through an air valve 14, and the feed inlet of the static powder concentrator 15 is connected with the coarse powder outlet of the first dynamic powder concentrator 6 through the second air locking device 5. The coarse powder obtained by classification of the first dynamic powder concentrator 6 enters the static powder concentrator 15 through the second air locking device 5, and fine powder and coarse powder are further screened in the static powder concentrator 15. The coarse powder outlet of the static powder concentrator 15 is connected to the pipeline of the coarse powder outlet of the V-shaped powder concentrator 12 through a third air locking device 16, so that the coarse powder output by the static powder concentrator 15 and the coarse powder output by the V-shaped powder concentrator 12 are converged and then conveyed into the roller press 3 through the circulating bucket 1. The fine powder outlet of the static powder concentrator 15 is connected with the inlet or outlet of the V-shaped powder concentrator 12 through a pipeline, so that the fine powder output by the static powder concentrator 15 enters the V-shaped powder concentrator 12.
Air is supplied to the whole system by a circulating fan 9, and cold air is introduced into the V-shaped powder concentrator 12 through a cold air valve 13.
As a modification of this embodiment, as shown in fig. 3, the secondary separation device may employ a second dynamic powder separator 17 instead of the static powder separator 15. The connecting structure of the second dynamic powder selecting machine 17 and other parts of the grinding system is the same as that of the static powder selecting machine 15.
The embodiment also discloses a grinding system and a grinding method, wherein the coarse powder separated by the first dynamic powder selecting machine 6 enters the static powder selecting machine 15 or the second dynamic powder selecting machine 17 through the second air locking device 5, the static powder selecting machine 15 or the second dynamic powder selecting machine 17 selects coarse powder and fine powder, the static powder selecting machine 15 or the second dynamic powder selecting machine 17 enters the inlet or the outlet of the V-shaped powder selecting machine 12 for the fine powder to be selected, and the static powder selecting machine 15 or the second dynamic powder selecting machine 17 converges the coarse powder to be selected with the coarse powder output by the V-shaped powder selecting machine 12 and then outputs the coarse powder and the coarse powder to the roller press 3 for continuous extrusion. The material cake extruded by the roller press 3 enters a V-shaped powder concentrator 12 so as to realize circulation.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, and the described embodiments of the present invention are merely illustrative of the preferred embodiments of the present invention, and do not limit the spirit and scope of the present invention. The respective specific technical features described in the above embodiments may be combined in any suitable manner without contradiction, and such a combination should also be regarded as disclosed in the present disclosure as long as it does not depart from the gist of the present invention. The invention is not described in detail in order to avoid unnecessary repetition.
The present invention is not limited to the specific details of the above embodiments, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art within the technical concept of the present invention and without departing from the design concept of the present invention shall fall within the protection scope of the present invention, and the technical contents of the present invention which are claimed are all described in the claims.
Claims (5)
1. A grinding system and a grinding method comprise a V-shaped powder selecting machine, a first dynamic powder selecting machine and a roller press, wherein an outlet of the V-shaped powder selecting machine is connected with an inlet of the first dynamic powder selecting machine, a coarse powder outlet of the V-shaped powder selecting machine is connected with a feed inlet of the roller press, a discharge outlet of the roller press is connected with the feed inlet of the V-shaped powder selecting machine, the grinding system is characterized by further comprising a secondary sorting device, a coarse powder outlet of the first dynamic powder selecting machine is connected with the feed inlet of the secondary sorting device, and a coarse powder outlet of the secondary sorting device is converged with a coarse powder outlet of the V-shaped powder selecting machine.
2. A pulverizing system as defined in claim 1, wherein the fine powder outlet of the secondary separation device is connected to the inlet or outlet of the V-type powder concentrator.
3. A milling system as defined in claim 1, wherein the secondary classifier is a static classifier.
4. A milling system as defined in claim 1, wherein the secondary classifier is a second dynamic classifier.
5. A grinding method based on the grinding system of any one of claims 1 to 4, characterized in that the coarse powder output from the first dynamic powder selector is further screened by a secondary screening device, and the coarse powder screened by the secondary screening device and the coarse powder output from the V-shaped powder selector are converged and conveyed to a roller press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310075258.7A CN115970850A (en) | 2023-02-07 | 2023-02-07 | Method for re-selecting returned powder of dynamic powder selecting machine of grinding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310075258.7A CN115970850A (en) | 2023-02-07 | 2023-02-07 | Method for re-selecting returned powder of dynamic powder selecting machine of grinding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115970850A true CN115970850A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310075258.7A Pending CN115970850A (en) | 2023-02-07 | 2023-02-07 | Method for re-selecting returned powder of dynamic powder selecting machine of grinding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115970850A (en) |
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2023
- 2023-02-07 CN CN202310075258.7A patent/CN115970850A/en active Pending
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Inventor after: Xie Chuandong Inventor after: Ding Rui Inventor after: Song Chuanjie Inventor after: He Zhengkai Inventor after: Ye Jiayuan Inventor before: Xie Chuandong Inventor before: Ding Rui Inventor before: Song Chuanjie Inventor before: He Zhengkai Inventor before: An Xiaopeng Inventor before: Ye Jiayuan |