CN218250708U - Grinding system - Google Patents

Grinding system Download PDF

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Publication number
CN218250708U
CN218250708U CN202222061975.8U CN202222061975U CN218250708U CN 218250708 U CN218250708 U CN 218250708U CN 202222061975 U CN202222061975 U CN 202222061975U CN 218250708 U CN218250708 U CN 218250708U
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China
Prior art keywords
chute
cement
ball mill
roller press
inlet
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CN202222061975.8U
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彭延松
杨恒杰
张睿
姚小彬
时红霞
唐子豪
迟万然
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Beijing Triumph International Engineering Co ltd
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Beijing Triumph International Engineering Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

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Abstract

The utility model provides a pair of grinding system belongs to industrial processing technology field, include: a roll squeezer; the double-rotor powder concentrator is provided with a feeding hole, a first discharging hole, a second discharging hole and a third discharging hole; the feed inlet is connected with the outlet end of the roller press; the first discharge hole is connected with a cement conveying device; the third discharge port is connected with the inlet end of the roller press; the cement conveying device can convey cement into a cement silo; the double-rotor powder concentrator is provided with an upper rotating cage and a lower rotating cage; the ball mill is provided with a ball mill inlet and a second mill outlet; the inlet of the ball mill is connected with the second discharge hole; and the outlet of the ball mill is connected with the cement processing device. This device uses birotor selection powder machine to divide into qualified farine, the great unqualified middlings of granule and the less unqualified middlings of granule with the material to put into the ball mill again with the great middlings of granule accurately and carry out the grinding, can effectively improve the efficiency of this device.

Description

Grinding system
Technical Field
The utility model relates to an industrial processing technology field, concretely relates to grinding system.
Background
Cement is an important industrial raw material that is widely used in various fields including construction and civil engineering. An important process in the manufacture of cement is the grinding of the cement. The raw materials used for manufacturing cement (such as limestone, clay, sand, iron ore, gypsum, etc.) are generally extracted from quarries or mines, processed to some extent in the process steps carried out after extraction, and then ground by mechanical means into fine powders for final processing into cement in the grinding process step.
According to the traditional grinding system, cake-shaped materials coming out of a roller press are scattered and sent into a single-rotor powder concentrator, the single-rotor powder concentrator can separate qualified fine powder and unqualified coarse powder in the scattered materials, the qualified fine powder is used for being subsequently processed into cement, unqualified coarse powder with rough particles can enter the roller press again for grinding, and unqualified coarse powder with small particles can enter a spherical grinding mill for grinding.
In the prior art, the single-rotor powder selecting machine is selected for powder selection, qualified fine powder and unqualified coarse powder can be separated out by the single-rotor powder selecting machine, but coarse powder with different particle sizes in the unqualified coarse powder cannot be further separated, and the powder selecting efficiency of the whole device is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that can not carry out further separation with the middlings that the particle size is different in the unqualified middlings among the prior art to a crocus system is provided.
A grinding system comprising:
a roller press having a roller press inlet and a roller press outlet;
the double-rotor powder concentrator is provided with a feeding hole, a first discharging hole, a second discharging hole and a third discharging hole; the feed inlet is connected with the outlet end of the roller press; the first discharge hole is connected with a cement conveying device; the third discharge port is connected with the inlet end of the roller press; the cement conveying device can convey cement into a cement warehouse; the double-rotor powder concentrator is provided with an upper rotating cage and a lower rotating cage; the rotating speeds of the upper rotating cage and the lower rotating cage are different;
a ball mill having a ball mill inlet and a second mill outlet; the inlet of the ball mill is connected with the second discharge hole; and the outlet of the ball mill is connected with the cement conveying device.
Preferably, the method further comprises the following steps:
the V-shaped powder concentrator is arranged between the outlet end and the feeding hole;
and the first conveying structure is arranged between the V-shaped powder concentrator and the roller press.
Preferably, the method comprises the following steps:
the buffer bin is arranged between the third discharge hole and the inlet end of the roller press; the buffer bin is connected with the V-shaped powder concentrator.
Preferably, the method further comprises the following steps:
and the first dust collector is arranged between the first discharge hole and the cement conveying device.
Preferably, the method further comprises the following steps:
and the first exhaust fan is connected with the inside of the first dust collector through a pipeline.
Preferably, the method further comprises the following steps:
the particle analyzer is arranged between the second pulverizer and the cement conveying device;
and the mill internal load instrument is arranged in the second mill.
Preferably, the method further comprises the following steps:
the second dust collector is connected with the ball mill through a pipeline;
preferably, the method further comprises the following steps:
and the second exhaust fan is connected with the inside of the second dust collector through a pipeline.
Preferably, the cement conveying device comprises a first chute, a second chute and a third chute; the first chute is suitable for the outlet of the first dust collector; the second chute is disposed below the particle analyzer; the third chute is connected with a cement silo; the first chute and the second chute are matched with the third chute; and a second conveying structure is also arranged between the second chute and the third chute.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a pair of grinding system, include: a roller press having a roller press inlet and a roller press outlet; the double-rotor powder concentrator is provided with a feeding hole, a first discharging hole, a second discharging hole and a third discharging hole; the feed inlet is connected with the outlet end of the roller press; the first discharge hole is connected with a cement conveying device; the third discharge hole is connected with the inlet end of the roller press; the cement conveying device can convey cement into a cement silo; the double-rotor powder concentrator is provided with an upper rotating cage and a lower rotating cage; the rotating speeds of the upper rotating cage and the lower rotating cage are different, and the upper rotating cage can separate qualified fine powder from unqualified coarse powder in the material; the lower rotating cage can separate unqualified coarse powder with larger particles from unqualified coarse powder with smaller particles; a ball mill having a ball mill inlet and a second mill outlet; the inlet of the ball mill is connected with the second discharge hole; and the outlet of the ball mill is connected with the cement processing device. This device uses birotor selection powder machine to divide into qualified farine with the material, the great unqualified middlings of granule and the less unqualified middlings of granule to put into the ball mill again with the great middlings of granule accurately and carry out the grinding, can effectively improve the efficiency of this device.
2. The utility model provides a grinding system, a V-shaped powder concentrator is arranged between a feed inlet of a double-rotor powder concentrator and an outlet of a roller press, and cake-shaped materials coming out of the roller press enter from a higher inlet of the V-shaped powder concentrator; the cake-shaped material impacts on the impact plate arranged in the V-shaped powder selecting machine in a ladder way under the action of gravity and is scattered under the action of impact force. Wherein, the scattered materials with larger volume are discharged from the bottom of the V-shaped powder concentrator, and the materials with smaller volume are discharged from the air outlet of the V-shaped powder concentrator along with the airflow in the V-shaped powder concentrator.
3. The utility model provides a pair of grinding system, roll squeezer must the full material operation, must guarantee between two rollers in the operation process to be full of the material, can not be interrupted, consequently sets up the surge bin of stationary flow effect on the import upper portion of roll squeezer.
4. The utility model provides a pair of grinding system, still be provided with first dust collector between the first discharge gate of birotor selection powder machine and cement conveyor, after dirty gas gets into first dust collector from the air intake, at first dirty gas can touch the oblique baffle in the middle of the air intake earlier, the air current just turned to the ash bucket this moment, the air current slows down simultaneously, because inertial effect, make partial granule dust in the dirty gas directly fall into the ash bucket, play the effect of gathering dust in advance, the gas that gets into the ash bucket upwards gets into the body of first dust collector, the filter bag through the inside metal framework that is equipped with of first dust collector, dust in the gas can be caught at the surface of filter bag. The gas entering the filter bag is finally collected to the air outlet pipe and discharged.
5. The utility model provides a pair of grinding system, can carry out automatically regulated to the integrated device in order to realize, still add and be equipped with particle analysis appearance and interior load appearance of mill, in normal production process, the particle analysis appearance detects the particle fineness of the cement that the ball mill produced, the space abundance of interior load appearance in to the ball mill detects, when particle analysis appearance feedback cement finished product fineness abundance is big, and under the prerequisite that interior load appearance of mill detected the interior surplus space of ball mill still, can reduce the rotational speed of rotor under the double-rotor selection powder machine, make the volume increase that gets into in the ball mill, thereby regulating action has been realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an overall structural schematic diagram of the grinding system provided by the present invention.
Description of reference numerals:
1. a roll squeezer; 2. a double-rotor powder concentrator; 3. a ball mill; 4. a V-shaped powder concentrator; 5. a first transfer structure; 6. a buffer bin; 7. a first dust collector; 8. a first exhaust fan; 9. a particle analyzer; 10. grinding an internal load instrument; 11. a second dust collector; 12. a second exhaust fan; 13. a first chute; 14. a second chute; 15. a third chute; 16. a second transfer structure.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the utility model provides a grinding system, include: the roller press 1 is provided with an inlet of the roller press 1 and an outlet of the roller press 1; the double-rotor powder concentrator 2 is provided with a feeding hole, a first discharging hole, a second discharging hole and a third discharging hole; the feed inlet is connected with the outlet end of the roller press 1; the first discharge hole is connected with a cement conveying device; the third discharge hole is connected with the inlet end of the roller press 1; the cement conveying device can convey cement into a cement silo; the double-rotor powder concentrator 2 is provided with an upper rotating cage and a lower rotating cage; the rotating speeds of the upper rotating cage and the lower rotating cage are different; the ball mill 3 is provided with an inlet of the ball mill 3 and an outlet of the second pulverizer; the inlet of the ball mill 3 is connected with the second discharge hole; and the outlet of the ball mill 3 is connected with the cement processing device. The device uses the double-rotor powder concentrator, and the upper rotating cage can separate qualified fine powder from unqualified coarse powder in the material; the lower rotating cage can separate unqualified coarse powder with rough particles from unqualified coarse powder with small particles; divide into qualified farine, the great unqualified middlings of granule and the less unqualified middlings of granule with the material to put into ball mill 3 again with the great middlings of granule accurately and carry out the grinding, can effectively improve the efficiency of this device.
Firstly, materials are fed from the upper part of two rollers of a roller press 1 and are continuously brought between the rollers by a squeezing roller, and the materials are changed into compact cakes after being subjected to the action of high pressure of 100-150MPa and are discharged from the lower part of a machine. The discharged cake, in addition to containing a proportion of finished fines. A large number of cracks are generated in the non-finished product particles, so that the grindability of the materials is improved, and the grinding energy consumption can be greatly reduced in the further grinding process. Then, conveying the cake-shaped materials to a first conveying structure 5 arranged between a V-shaped powder concentrator 4 and a roller press 1, wherein the first conveying structure 5 is specifically a circulating bucket elevator;
wherein the roller press 1 must be operated with full material, and the two rollers must be ensured to be full of material in the operation process without interruption, so the upper part of the inlet of the roller press 1 is provided with a buffer bin 6 with steady flow function. The volume of the buffer bin 6 cannot be too small, otherwise the buffer space is too small, and the normal operation of the roller press 1 is affected.
The cake-shaped materials output from the roller press 1 are further sent into a V-shaped powder concentrator 4 to be scattered, the V-shaped powder concentrator 4 is a static grading scattering device specially used for the roller press 1, and the cake-shaped materials output from the roller press 1 are scattered by left-in and right-out. Cake-shaped materials enter from a higher inlet of the V-shaped powder concentrator 4 under the action of the first conveying structure 5; the cake-shaped material impacts the impact plates which are arranged in the V-shaped powder concentrator 4 in a stepped manner under the action of gravity and is scattered under the action of impact force. Wherein the bigger material of volume is discharged from V type selection powder machine 4 bottom after breaking up, and wherein V type selection powder machine 4 and surge bin 6 are connected, and the bigger material of volume directly gets into in surge bin 6, is broken by roller press 1 again afterwards. The material with smaller volume is discharged from the air outlet of the V-shaped powder concentrator 4 along with the airflow in the V-shaped powder concentrator 4.
The less material of volume can get into in the birotor selection powder machine 2 and select powder, and the material at first can get into upper portion rotating cage, and the material gets into at first and fully breaks up it after, breaks up and is the broken principle of utilization centrifugal impact. The material is accelerated after contacting the scattering disk rotating at high speed, and the accelerated material is separated from the scattering disk under the action of centrifugal force and impacts the impact plate to be crushed. The crushed materials enter the wind power powder selecting area, the movement state of the coarse powder changes less, the movement state of the fine powder changes more, so that coarse powder and fine powder are separated, the materials passing through the upper rotating cage are divided into qualified fine powder and unqualified coarse powder, and the unqualified coarse powder is put into the lower rotating cage in the same way, so that the unqualified coarse powder can be divided into coarse powder with larger particles and coarse powder with smaller particles.
And then the qualified fine powder enters a first dust collector 7 through a first discharge hole, the first dust collector 7 is arranged between the first discharge hole and the cement conveying device, and the first dust collector 7 can collect dust in dust-containing air and filter the air. The first dust collector 7 is also connected with the first transmission structure and the roller press 1 through pipelines, and can filter dust-containing air generated in the production process.
After dusty gas got into first dust collector 7 from the air intake, dusty gas can touch the oblique baffle in the middle of the air intake earlier at first, the air current just turns to the ash bucket this moment, and the air current slows down simultaneously, because inertial effect, make some granule dust in the dusty gas directly fall into the ash bucket, play the effect of gathering dust in advance, the gas that gets into the ash bucket upwards gets into the body of first dust collector 7, through the inside filter bag that is equipped with metal framework of first dust collector 7, dust in the gas can be caught at the surface of filter bag. The gas entering the filter bag is collected to an air outlet pipe and discharged, and the air outlet pipe of the first dust collector 7 is connected with a first exhaust fan 8 through a pipeline; the first exhaust fan 8 is communicated with the inside of the first dust collector 7 through a pipeline, and the first exhaust fan 8 supplies the first dust collector 7 with required wind power.
Unqualified coarse powder with smaller particles enters the ball mill 3 through a second discharge hole, and the unqualified coarse powder with smaller particles enters the ball mill 3; the ball mill 3 is composed of a horizontal cylinder, a feeding and discharging hollow shaft, a grinding head and the like, wherein the cylinder is a long cylinder, a grinding body is arranged in the cylinder, the grinding body is generally a steel ball and is arranged in the cylinder according to different diameters and a certain proportion, and the grinding body can also be a steel section. The material is selected according to the granularity of the ground material, the material is loaded into the cylinder body from the hollow shaft at the feeding end of the ball mill 3, when the cylinder body of the ball mill 3 rotates, the grinding body is attached to the lining plate of the cylinder body and taken away by the cylinder body under the action of inertia and centrifugal force and friction force, when the grinding body is taken to a certain height, the grinding body is thrown off under the action of the gravity of the grinding body, and the falling grinding body breaks the material in the cylinder body like a projectile body. The volume of the unqualified coarse powder with smaller particles is further reduced under the action of the ball mill 3, so that the unqualified coarse powder meets the requirement of qualified fine powder. Then, conveying qualified fine powder discharged from the ball mill 3 to a cement conveying device;
the ball mill 3 is also connected with a second dust collector 11, dust collection treatment is carried out on the ball mill 3 through the second dust collector 11, when dust-containing air enters the second dust collector 11, the dust in the dust-containing air is captured, the same as the first dust collector 7, and the interior of the second dust collector 11 is connected with a second exhaust fan 12 through a pipeline; and the second exhaust fan 12 supplies the second dust collector 11 with the required wind power.
An internal load meter 10 is also installed inside the ball mill 3, and the internal load meter 10 is responsible for monitoring the remaining space which can contain materials inside the second pulverizer. A particle analyzer 9 is also provided between the second mill and the cement conveyor, the particle analyzer 9 being capable of detecting the particle size of the qualified fine powder discharged from the second mill.
The cement conveying device comprises a first chute 13, a second chute 14 and a third chute 15; the cement transporting device functions as a cement silo for transporting cement. Wherein a first chute 13 is adapted to the outlet arrangement of said first dust collector 7; a specific first chute 13 is provided below the outlet of the first dust collector 7. Wherein a second chute 14 is provided below said particle analyzer 9; the third chute 15 is connected with a cement silo; the first chute 13 and the second chute 14 are matched with the third chute 15; the cement on the first chute 13 and the second chute 14 can finally fall on the third chute 15. Wherein a second conveying structure 16 is further arranged between the second chute 14 and the third chute 15. The second transfer structure 16 is responsible for transporting the cement on the second chute 14 to the third chute 15.
The grinding system adopts a large number of permanent magnet motors, and all the hydraulic couplers are replaced by magnetic couplers.
The first exhaust fan 8 and the second exhaust fan 12 in the grinding system all adopt high-efficiency energy-saving fans with mechanical efficiency of more than 80%.
The grinding system feeds back information in real time through the mill internal load instrument 10 and the particle analyzer 9, the system achieves the purposes of automatically adjusting the rotating speed of the double-rotor powder concentrator 2 and automatically adjusting the yield through software algorithm calculation, the yield of the grinding system is used as a dependent variable, and the rotating speed of the first exhaust fan 8 and the rotating speed of the second exhaust fan 12, the rotating speed of an upper rotating cage and a lower rotating cage of the double-rotor powder concentrator 2, the material level of the buffer bin 6, and the particle analyzer 9 and the mill internal load instrument 10 are used as independent variables. The above dependent variable and independent variable have the following logical relationship:
when production is in progress, when the fineness margin of the finished cement product is fed back by the particle analyzer 9, the rotating speed of the lower cage rotor of the double-rotor powder concentrator 2 is reduced on the premise that the in-mill load instrument 10 detects that the material level of the ball mill 3 has a margin space, so that the amount of coarse powder with smaller particles entering the ball mill 3 is increased, then the material level of the buffer bin 6 is gradually reduced, the yield of a grinding system is used as a dependent variable to receive a production adding signal, the automatic adjustment is finished, and vice versa; when the output of the cement grinding system is obviously increased, the rotating speed of the first exhaust fan 8, the rotating speed of the second exhaust fan 12 and the rotating speed of a rotating cage rotor on the powder concentrator need to be properly increased.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (9)

1. A pulverizing system, comprising:
the roller press (1) is provided with an inlet of the roller press (1) and an outlet of the roller press (1);
the double-rotor powder concentrator (2) is provided with a feeding hole, a first discharging hole, a second discharging hole and a third discharging hole; the feed inlet is connected with the outlet end of the roller press (1); the first discharge hole is connected with a cement conveying device; the third discharge hole is connected with the inlet end of the roller press (1); the double-rotor powder concentrator (2) is provided with an upper rotating cage and a lower rotating cage; the rotating speeds of the upper rotating cage and the lower rotating cage are different;
a ball mill (3) having a ball mill (3) inlet and a second mill outlet; the inlet of the ball mill (3) is connected with the second discharge hole; and the outlet of the ball mill (3) is connected with the cement conveying device.
2. The pulverizing system of claim 1, further comprising:
the V-shaped powder concentrator (4) is arranged between the outlet end and the feeding hole;
and the first conveying structure (5) is arranged between the V-shaped powder concentrator (4) and the roller press (1).
3. A grinding system according to claim 2, comprising:
the buffer bin (6) is arranged between the third discharge hole and the inlet end of the roller press (1); the buffer bin (6) is connected with the V-shaped powder concentrator (4).
4. The pulverizing system of claim 2, further comprising:
and the first dust collector (7) is arranged between the first discharge hole and the cement conveying device.
5. A grinding system according to claim 4, characterized in that further comprising:
and the first exhaust fan (8) is connected with the inside of the first dust collector (7) through a pipeline.
6. The pulverizing system of claim 5, further comprising:
a particle analyzer (9) disposed between the second mill and the cement delivery device;
and the mill internal load instrument (10) is arranged in the second mill.
7. The pulverizing system of claim 1, further comprising:
and the second dust collector (11) is connected with the ball mill (3) through a pipeline.
8. A grinding system according to claim 7, characterized in that further comprising:
and the second exhaust fan (12) is connected with the inside of the second dust collector (11) through a pipeline.
9. A grinding system according to claim 6, characterized in that the cement conveying device comprises a first chute (13), a second chute (14) and a third chute (15); the first chute (13) is suitable for the outlet arrangement of the first dust collector (7); the second chute (14) is arranged below the particle analyzer (9); the third chute (15) is connected with a cement silo; the first chute (13) and the second chute (14) are matched with the third chute (15); a second conveying structure (16) is also arranged between the second chute (14) and the third chute (15).
CN202222061975.8U 2022-08-05 2022-08-05 Grinding system Active CN218250708U (en)

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Application Number Priority Date Filing Date Title
CN202222061975.8U CN218250708U (en) 2022-08-05 2022-08-05 Grinding system

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Application Number Priority Date Filing Date Title
CN202222061975.8U CN218250708U (en) 2022-08-05 2022-08-05 Grinding system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116328927A (en) * 2023-02-20 2023-06-27 南京凯盛国际工程有限公司 A Grinding Equipment Based on Target Particle Size Distribution Control
CN116375374A (en) * 2023-04-14 2023-07-04 山东沾化崇正水泥有限公司 Mixing process for cement production
CN116747993A (en) * 2023-06-16 2023-09-15 北京和隆优化科技股份有限公司 An intelligent control method and system applied to cement joint grinding
CN117816334A (en) * 2023-12-22 2024-04-05 广德新杭南方水泥有限公司 Intelligent analysis device for cement grinding system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116328927A (en) * 2023-02-20 2023-06-27 南京凯盛国际工程有限公司 A Grinding Equipment Based on Target Particle Size Distribution Control
CN116375374A (en) * 2023-04-14 2023-07-04 山东沾化崇正水泥有限公司 Mixing process for cement production
CN116747993A (en) * 2023-06-16 2023-09-15 北京和隆优化科技股份有限公司 An intelligent control method and system applied to cement joint grinding
CN117816334A (en) * 2023-12-22 2024-04-05 广德新杭南方水泥有限公司 Intelligent analysis device for cement grinding system

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