CN211887337U - Cement roller press finish grinding system - Google Patents

Abstract

The utility model relates to a cement roller press finish grinding system, including the outer circulation vertical mill, first lifting machine, the shale shaker, the stationary flow storehouse, the roller press, the second lifting machine, the selection powder subassembly, the dust collector, the chute, fan and chimney, the discharge gate of outer circulation vertical mill links to each other with the feed inlet of first lifting machine, the discharge gate of first lifting machine links to each other with the feed inlet of shale shaker, the discharge gate of shale shaker links to each other with the feed inlet in stationary flow storehouse, the discharge gate of stationary flow storehouse links to each other with the feed inlet of roller press, the discharge gate of roller press links to each other with the feed inlet of second lifting machine, the discharge gate of second lifting machine links to each other with the feed inlet of selection powder subassembly, the play powder mouth of selection powder subassembly links to each other with; the discharge hole of the powder selecting component is connected with the feed inlet of the steady flow bin; the utility model discloses a control feeding granularity is so that the roll squeezer roll gap is undulant less to weaken roll squeezer vibration strength by a wide margin, and guaranteed the cement performance, reduced cyclic load and energy consumption simultaneously.

Description

Cement roller press finish grinding system

Technical Field

The utility model relates to a cement roller press finish grinding system.

Background

At present, cement grinding mainly comprises two modes, namely a combined grinding mode or a semi-final grinding mode consisting of a roller press and a ball mill, and an internal and external circulation vertical mill final grinding mode (a built-in powder concentrator); in the first mode, the shapes of the powder extruded by the roller press are mainly needle-shaped and flake-shaped, so that the water requirement of the cement is high, and the performance of the cement is poor; in addition, the circulation load is large, generally about 700%, the fine powder amount in the materials subjected to circulation extrusion is large, the particle size range of the materials is large (the particle size ranges from dozens of micrometers to dozens of millimeters), so that the roll gap fluctuation of the roll squeezer is large, the roll squeezer vibrates greatly and the extrusion effect is poor, and water is required to be sprayed to stabilize a material bed in serious cases, but cement is different from raw cement powder, the performance of the cement is negatively affected after the water is sprayed, and the strength of the cement is reduced; the second mode can adapt to materials with large particle size range, the adaptability of the materials with larger particle size is better than that of the first mode, but compared with the first mode, the energy consumption of the materials is higher, and the materials are to be further improved.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a through control feeding granularity so that the roll squeezer roll gap is undulant less is provided to weaken the roll squeezer vibration intensity by a wide margin, and guaranteed the cement performance, reduced the cement roll squeezer final grinding system of cyclic load and energy consumption simultaneously.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a cement roller press finish grinding system which characterized in that: the device comprises an external circulation vertical mill, a first elevator, a vibrating screen, a steady flow bin, a roller press, a second elevator, a powder selecting assembly, a dust collector, a chute, a fan and a chimney, wherein a discharge hole of the external circulation vertical mill is connected with a feed hole of the first elevator, a discharge hole of the first elevator is connected with a feed hole of the vibrating screen, a discharge hole of the vibrating screen is connected with a feed hole of the steady flow bin, a discharge hole of the steady flow bin is connected with a feed hole of the roller press, a discharge hole of the roller press is connected with a feed hole of the second elevator, a discharge hole of the second elevator is connected with a feed hole of the powder selecting assembly, and a powder outlet of the powder selecting assembly is connected with an air inlet of the dust collector; the discharge hole of the powder selecting assembly is connected with the feed inlet of the flow stabilizing bin; an air outlet of the dust collector is connected with an air inlet of a fan, and an air outlet of the fan is connected with an air inlet of a chimney; the chute is arranged below a discharge hole of the dust collector.

Preferably, the powder selecting assembly comprises a V-shaped powder selecting machine, a rough powder selecting machine and a fine powder selecting machine; the feed inlet of the V-shaped powder concentrator is connected with the discharge outlet of the second elevator, the fine powder discharge outlet of the V-shaped powder concentrator is connected with the feed inlet of the rough powder concentrator, and the fine powder discharge outlet of the rough powder concentrator is connected with the feed inlet of the fine powder concentrator; and a fine powder discharge port of the fine powder concentrator is connected with an air inlet of the dust collector.

Preferably, the coarse powder discharge port of the V-shaped powder concentrator, the coarse powder discharge port of the coarse powder concentrator and the coarse powder discharge port of the fine powder concentrator are connected with the feed port of the steady flow bin.

Preferably, a first screen and a second screen are further arranged in the vibrating screen, the first screen is arranged above the second screen, and screen holes of the first screen are matched with the roll diameter of the roll squeezer.

Preferably, the first screen has an inner diameter of 5 to 15 mm.

Preferably, the second screen has an inner diameter of 2 to 4 mm.

Preferably, the coarse powder concentrator is externally arranged between the V-shaped powder concentrator and the fine powder concentrator, and is internally arranged in the V-shaped powder concentrator or is internally arranged in the fine powder concentrator.

Compared with the prior art, the utility model has the advantages of: the utility model integrates the advantages of two modes of combined grinding or semi-final grinding and internal and external circulation vertical grinding (a built-in powder concentrator) which are composed of a roller press and a ball mill, an external circulation vertical mill is additionally arranged in front of a roller press system, a large material is screened out by a vibrating screen and returned to the external circulation vertical mill for circulation grinding, and a small-granularity material enters the roller press system, so that the control of feeding granularity is realized, thereby the roller press material bed is compact, the fluctuation of a roller gap is small, the vibration intensity of the roller press is greatly weakened, and the water spraying of the material is not needed, thereby the cement performance is ensured; meanwhile, the cyclic load and the energy consumption are reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the structure of the rough powder concentrator of the present invention, which is arranged inside a V-shaped powder concentrator;

fig. 3 is a schematic diagram of the structure of the coarse powder concentrator of the present invention, which is arranged in the fine powder concentrator.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1, a cement roller mill finish grinding system comprises an external circulation vertical mill 1, a first elevator 2, a vibrating screen 3, a steady flow bin 4, a roller mill 5, a second elevator 6, a powder selecting component, a dust collector 10, a chute 11, a fan 12 and a chimney 13, wherein a discharge hole of the external circulation vertical mill 1 is connected with a feed hole of the first elevator 2, a discharge hole of the first elevator 2 is connected with a feed hole of the vibrating screen 3, a discharge hole of the vibrating screen 3 is connected with a feed hole of the steady flow bin 4, a discharge hole of the steady flow bin 4 is connected with a feed hole of the roller mill 5, a discharge hole of the roller mill 5 is connected with a feed hole of the second elevator 6, a discharge hole of the second elevator 6 is connected with a feed hole of the powder selecting component, and a powder outlet of the powder selecting component is connected with an air inlet of; the discharge hole of the powder selecting component is connected with the feed inlet of the steady flow bin 4; an air outlet of the dust collector 10 is connected with an air inlet of a fan 12, and an air outlet of the fan 12 is connected with an air inlet of a chimney 13; the chute 11 is arranged below a discharge hole of the dust collector 10; the powder selecting component comprises a V-shaped powder selecting machine 7, a rough powder selecting machine 8 and a fine powder selecting machine 9; the rough powder concentrator 8 is externally arranged between the V-shaped powder concentrator 7 and the fine powder concentrator 9; the feed inlet of the V-shaped powder concentrator 7 is connected with the discharge outlet of the second elevator 6, the fine powder discharge outlet of the V-shaped powder concentrator 7 is connected with the feed inlet of the rough powder concentrator 8, and the fine powder discharge outlet of the rough powder concentrator 8 is connected with the feed inlet of the fine powder concentrator 9; a fine powder discharge hole of the fine powder concentrator 9 is connected with an air inlet of the dust collector 10; the coarse powder discharge port of the V-shaped powder concentrator 7, the coarse powder discharge port of the coarse powder concentrator 8 and the coarse powder discharge port of the fine powder concentrator 9 are connected with the feed port of the steady flow bin 4.

The working principle is as follows: various cement raw materials are output outwards through corresponding storage bins or repositories of the batching station, and are unloaded to a batching belt after being weighed by a batching scale, and the batching belt sends the cement raw materials into a feed inlet of the external circulation vertical mill 1; the large cement raw materials are crushed and ground by the external circulation vertical mill 1 to form a mixed material with the powder, the mixed material is sent into the vibrating screen 3 through the first hoisting machine 2 to be screened, the large cement raw materials still return to the external circulation vertical mill 1 to be crushed and ground again, the mixed material without the large cement raw materials enters the roller press 5 through the steady flow bin 4, and the mixed material is extruded by the roller press 5 to obtain a material with smaller granularity; then, the materials are sent into a V-shaped powder concentrator 7 through a second hoister 6 after being discharged from the roller press 5, and then sequentially pass through a rough powder concentrator 8 and a fine powder concentrator 9, three-level powder concentration is carried out, and fine powder selected by the fine powder concentrator 9 is a cement finished product; finally, the finished cement is collected by a dust collector 10 and then is sent into a cement warehouse by a chute 11; the coarse powder screened out by the V-shaped powder selecting machine 7, the coarse powder selecting machine 8 and the fine powder selecting machine 9 returns to the steady flow bin 4 to be circularly extruded and ground in the roller press 5 again; the flue gas generated in the V-shaped powder concentrator 7, the rough powder concentrator 8 and the fine powder concentrator 9 is driven by a fan 12 to be dedusted by a dust collector 10 and then discharged into the atmosphere through a chimney 13.

In a preferred embodiment of the present invention, the vibrating screen 3 is further provided with a first screen 31 and a second screen 32, the first screen 31 is disposed above the second screen 32, and the inner diameter of the screen hole of the first screen 31 is 5-15mm and is matched with the diameter of the roller press 5; the inner diameter of the second screen 32 is 2-4 mm; when the material passes through the vibrating screen 3, the first screen 31 and the second screen 32 divide the material into coarse powder, medium coarse powder and fine powder, the material on the first screen 31 is coarse powder, the material between the first screen 31 and the second screen 32 is medium coarse powder, the material under the second screen 32 is fine powder, the coarse powder returns to the external circulation vertical mill 1, the medium coarse powder enters the roller press 5 through the steady flow bin 4, and the fine powder is directly mixed with the material output from the roller press 5 and then enters the V-shaped powder concentrator 7 through the second elevator 6.

As shown in fig. 2, in a preferred embodiment of the present invention, the rough powder concentrator 8 is disposed inside the V-shaped powder concentrator 7 to save space; and on the premise of realizing the same grading effect, the output material of the V-shaped powder concentrator 7 is controlled to have no large particles (the granularity is less than 1mm) so as to reduce the material handling capacity of the fine powder concentrator 9.

As shown in fig. 3, in a preferred embodiment of the present invention, the rough powder classifier 8 is disposed inside the fine powder classifier 9 to save space and realize fine classification of the powder material.

The utility model integrates the advantages of two modes of combined grinding or semi-final grinding and internal and external circulation vertical grinding (a built-in powder concentrator) which are composed of a roller press and a ball mill, an external circulation vertical mill 1 is additionally arranged in front of a roller press system, a large material is screened out through a vibrating screen 3 and returned to the external circulation vertical mill 1 for circulation grinding, and a small-granularity material enters a roller press system, so that the control of feeding granularity is realized, thereby leading a material bed of the roller press 5 to be compact, leading the fluctuation of a roller gap to be smaller, greatly weakening the vibration intensity of the roller press, and needing not to spray water on the material, thereby ensuring the performance of cement; meanwhile, the cyclic load and the energy consumption are reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (7)

1. The utility model provides a cement roller press finish grinding system which characterized in that: the device comprises an external circulation vertical mill, a first elevator, a vibrating screen, a steady flow bin, a roller press, a second elevator, a powder selecting assembly, a dust collector, a chute, a fan and a chimney, wherein a discharge hole of the external circulation vertical mill is connected with a feed hole of the first elevator, a discharge hole of the first elevator is connected with a feed hole of the vibrating screen, a discharge hole of the vibrating screen is connected with a feed hole of the steady flow bin, a discharge hole of the steady flow bin is connected with a feed hole of the roller press, a discharge hole of the roller press is connected with a feed hole of the second elevator, a discharge hole of the second elevator is connected with a feed hole of the powder selecting assembly, and a powder outlet of the powder selecting assembly is connected with an air inlet of the dust collector; the discharge hole of the powder selecting assembly is connected with the feed inlet of the flow stabilizing bin; an air outlet of the dust collector is connected with an air inlet of a fan, and an air outlet of the fan is connected with an air inlet of a chimney; the chute is arranged below a discharge hole of the dust collector.

2. The cement roller press finish grinding system according to claim 1, characterized in that: the powder selecting component comprises a V-shaped powder selecting machine, a rough powder selecting machine and a fine powder selecting machine; the feed inlet of the V-shaped powder concentrator is connected with the discharge outlet of the second elevator, the fine powder discharge outlet of the V-shaped powder concentrator is connected with the feed inlet of the rough powder concentrator, and the fine powder discharge outlet of the rough powder concentrator is connected with the feed inlet of the fine powder concentrator; and a fine powder discharge port of the fine powder concentrator is connected with an air inlet of the dust collector.

3. The cement roller press finish grinding system according to claim 2, characterized in that: and the coarse powder discharge port of the V-shaped powder concentrator, the coarse powder discharge port of the coarse powder concentrator and the coarse powder discharge port of the fine powder concentrator are connected with the feed port of the steady flow bin.

4. The cement roller press finish grinding system according to claim 1, characterized in that: still be equipped with first screen cloth and second screen cloth in the shale shaker, the top of second screen cloth is located to first screen cloth, the sieve mesh of first screen cloth and the mutual cooperation of the roller diameter of roll squeezer.

5. The cement roller press finish grinding system according to claim 4, characterized in that: the inner diameter of the first screen is 5-15 mm.

6. The cement roller press finish grinding system according to claim 4, characterized in that: the inner diameter of the second screen is 2-4 mm.

7. The cement roller press finish grinding system according to claim 2, characterized in that: the coarse powder separator is externally arranged between the V-shaped powder separator and the fine powder separator, and is internally arranged in the V-shaped powder separator or is internally arranged in the fine powder separator.

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