CN211964510U - Circulation screening raw material grinds system - Google Patents

Abstract

The utility model relates to a circulation screening raw material grinds system, unload the mill in including, it includes the corase grind storehouse to unload the mill in, the fine grinding storehouse, unload the storehouse in being provided with between corase grind storehouse and the fine grinding storehouse, in unload and be provided with the discharge gate on the storehouse, discharge gate department is provided with the fortune material chute, fortune material chute intercommunication has bucket elevator, the last intercommunication of bucket elevator has the powder concentrator, it has the finished product storehouse to set up the intercommunication on the powder concentrator, and be provided with the feed back mouth on the powder concentrator, the feed back mouth all communicates with corase grind storehouse and fine grinding storehouse, corase grind storehouse one end is provided with the stoving storehouse, stoving storehouse and corase grind storehouse intercommunication set up, the intercommunication has waste heat pipeline on the stoving storehouse, be provided with the stoving rotary drum in the stoving storehouse, stoving rotary drum and corase grind integrative setting in storehouse, the stoving storehouse rotates with the stoving rotary drum to be connected, and. The utility model discloses a setting utilizes the stoving storehouse that the waste heat was dried, has realized the stoving effect to whole raw materials, has reduced the moisture that contains in the raw materials by a wide margin.

Description

Circulation screening raw material grinds system

Technical Field

The utility model relates to a cement manufacture equipment field especially relates to a circulation screening raw material grinds system.

Background

The raw material is processed by a medium-discharge drying mill in the cement production industry, the drying heat source of the medium-discharge mill is from kiln tail waste gas, and the raw material proportion in normal production is as follows: 88% of limestone, 8% of silica and 4% of iron powder. Because the limestone has lower calcium content, the grindability is poorer. Despite the considerable work done from many aspects, the grindable stands have not been effectively improved. In order to relieve the internal working condition of the mill, the mill is stopped suddenly during normal feeding for many times, and the milling sample shows that the content of particles larger than 5mm is 6% -10%. Because the diameter of the fine grinding bin is small, the fine grinding bin is difficult to smash, the grinding efficiency is reduced, the material entering the powder concentrator is too coarse, and the cyclic load rate of the powder concentrator is too high to 500-600%. The output can not be improved when the machine is forced to be reduced due to overlarge current of the grinding bucket type elevator and the powder concentrator. Repeated researches show that the excessive content of the particles larger than 5mm in the returned material of the powder concentrator is the main reason for reducing the efficiency of the fine grinding bin and the yield of the medium-discharge grinding.

In view of the above, chinese patent No. CN204320436U discloses a middle discharge mill powder selecting device for cement raw material preparation, which comprises a powder selecting machine, a fine mill bin and a coarse mill bin, wherein the bottom of the powder selecting machine is provided with a coarse powder discharging pipe and a finished product discharging pipe, the end of the coarse powder discharging pipe is provided with a grading rotary discharging screen, the grading rotary discharging screen comprises a casing, a screen and a driving motor, and the screen can complete the powder screening operation under the driving of the driving motor; the screen cloth below of hierarchical gyration unloading sieve is connected to the fine grinding storehouse through unloading union coupling, and the screen cloth top is connected to the corase grind storehouse through a powder belt that returns, and the discharge gate in fine grinding storehouse and corase grind storehouse all is connected with a circulation bucket elevator through a chute, and circulation bucket elevator is connected to the selection powder machine. The utility model discloses an it has increased one set of hierarchical screening plant in the system of grinding unloading in the former, installs at the end of selection powder machine middlings unloading pipe, and sieve mesh diameter 5mm is equipped with 7.5kw motor and is equipped with the converter, the rotational speed of the adjustment screen frame of being convenient for. After the returned material of the powder concentrator is screened by a rotary screen of a grading and screening device, coarse particles larger than 5mm are sent into a coarse grinding bin by a return belt for secondary crushing; and (4) grinding the particles smaller than 5mm in a fine grinding bin.

The above-mentioned solution still has the following problems that the raw material can become damp before entering the rough grinding chamber and the fine grinding chamber due to the large water content in the air during transportation, storage and the like, and the grinding of the raw material can be affected when the raw material is put into the middle discharge mill.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circulation screening raw material grinds system utilizes the stoving storehouse that the waste heat was dried through the setting, has realized the stoving effect to whole raw materials, has reduced the moisture that contains in the raw materials by a wide margin.

The utility model aims at realizing through the following technical scheme:

a raw material grinding system for circular screening comprises a middle unloading grinder, wherein the middle unloading grinder comprises a coarse grinding bin and a fine grinding bin, a middle unloading bin is arranged between the coarse grinding bin and the fine grinding bin, a discharge port is arranged on the middle unloading bin, a material conveying chute is arranged at the discharge port and communicated with a bucket elevator, a powder concentrator is communicated with the bucket elevator, a finished product bin is communicated with the powder concentrator, a material return port is arranged on the powder concentrator, a sorting mechanism is communicated with the material return port, a drying bin is arranged at one end of the coarse grinding bin, reprocessing ports are arranged on the drying bin and the fine grinding bin, reclaiming pipelines are connected between the reprocessing ports and the sorting mechanism, the drying bin is communicated with the coarse grinding bin, a waste heat pipeline is communicated with the drying bin, and a drying drum is arranged in the drying bin, the stoving rotary drum with the integrative setting in corase grind storehouse, the stoving storehouse with the stoving rotary drum rotates to be connected, just the stoving rotary drum with be provided with heat conduction chamber between the stoving storehouse inner wall, heat conduction chamber with waste heat pipeline intercommunication sets up.

By adopting the technical scheme, when raw materials are unloaded and ground in use, the raw materials can enter the drying rotary drum firstly, a heat conduction cavity is formed between the drying rotary drum and the drying bin, waste heat generated on a production line in a waste heat pipeline can be used as a heat source to be supplied to the heat conduction cavity in the drying bin, heat in the heat conduction cavity can be further conducted to the drying rotary drum, the raw materials can enter the coarse grinding bin after being dried in the drying rotary drum, the raw materials can enter the fine grinding bin after being coarsely ground, the raw materials are further ground in the fine grinding bin, the quality of the raw materials can be greatly improved through two times of grinding, the raw materials after being finely ground can be discharged from the unloading bin to the material conveying chute and conveyed to the bucket elevator in the chute, the raw materials are conveyed to the powder selecting machine under the action of the bucket elevator, the powder selecting machine can screen the ground raw materials, and the raw materials which accord with the standard can enter the finished product bin, the materials which do not meet the use standard of the raw materials are discharged from the material return port, the materials which need to enter the rough grinding bin and the materials which need to enter the fine grinding bin are respectively separated under the action of the separation mechanism, and the materials after separation can be respectively moved to the rough grinding bin and the fine grinding bin in the material return pipeline. The quality of the raw materials can be improved by the raw materials dried by the drying bin, and the condition that the quality of the raw material grinding finished product is reduced due to the fact that the moisture content in the raw materials is too large is prevented.

The utility model discloses further set up to: and a plurality of stirring blades are arranged on the inner wall of the drying rotary drum at equal intervals.

Through adopting above-mentioned technical scheme, stirring vane's setting can be so that raw and other materials by the intensive mixing when drying in the stoving rotary drum, makes raw and other materials fully turned, makes the heat in raw and other materials and the stoving storehouse fully contact for various raw and other materials in the stoving storehouse can be by even stoving, have strengthened the stoving effect.

The utility model discloses further set up to: a plurality of stirring vane set up to the arc piece, just a plurality of curved stirring vane be to the corase grind storehouse screw feed form.

Through adopting above-mentioned technical scheme, the setting up of arc piece can make raw and other materials present whole to the motion of corase grind storehouse direction when stirring, has avoided the raw materials dwell time overlength can't get into the inside condition in corase grind storehouse and has taken place in the stoving rotary drum.

The utility model discloses further set up to: the outer wall of the drying rotary drum is provided with a plurality of concave holes.

Through adopting above-mentioned technical scheme, the setting up of shrinkage pool can be so that the outer wall of stoving rotary drum and the area of contact increase between the heat conduction chamber for the heat in the heat conduction chamber can be faster transmit to the stoving rotary drum on, thereby improve hot-conductive efficiency, make the stoving rotary drum can be faster with heat conduction to inside stoving operation to raw and other materials.

The utility model discloses further set up to: a conveyor belt is arranged in the conveying chute.

Through adopting above-mentioned technical scheme, the setting up of conveyer belt can be so that the condition that raw and other materials through the grinding can not appear detaining in the fortune material chute, has improved the efficiency of transporting.

The utility model discloses further set up to: be provided with the buffer board on the feed back pipeline inner wall, just the equal downward sloping setting of buffer board.

Through adopting above-mentioned technical scheme, the setting of buffer board can be hindered when making raw and other materials fall in the feed back pipeline to the impact force that produces when reducing raw and other materials whereabouts has increased the life of pipeline.

The utility model discloses further set up to: and a buffer bent pipe is arranged at the reprocessing port and is in flange connection with the reprocessing port and the return pipeline.

Through adopting above-mentioned technical scheme, when the buffering return bend produced the damage under long-time material impact, the staff can only change the buffering return bend to avoid changing the condition of whole pipeline, reduced the material extravagant.

The utility model discloses further set up to: and a guide plate is arranged on the buffer bent pipe at the position right facing the material return pipe, the guide plate inclines towards the reprocessing port, and the guide plate is connected with the buffer bent pipe through a flange.

Through adopting above-mentioned technical scheme, the setting up of deflector can carry out the guide effect to the material, prevents that the material from producing in return bend corner and piling up.

To sum up, the utility model discloses a beneficial technological effect does:

through setting up the stoving storehouse of utilizing the waste heat to dry, realized the stoving effect to whole raw materials, reduced the moisture that contains in the raw materials by a wide margin.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the middle unloading mill of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 2.

In the figure, 1, unloading and grinding; 11. a coarse grinding bin; 12. finely grinding the bin; 13. intermediate unloading; 14. a discharge port; 15. re-processing the opening; 2. a material conveying chute; 21. a conveyor belt; 3. a bucket elevator; 4. selecting a powder machine; 41. a feed back port; 5. a finished product warehouse; 6. a sorting mechanism; 7. a return conduit; 8. a drying bin; 81. a waste heat pipeline; 82. drying the rotary drum; 83. a heat conducting cavity; 84. a stirring blade; 85. concave holes; 9. a buffer plate; 91. buffering the bent pipe; 92. a guide plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a circulation screening raw material grinds system, unload including well and grind 1, well unload to grind 1 including corase grind storehouse 11, fine grinding storehouse 12, is provided with in unloading storehouse 13 between corase grind storehouse 11 and the fine grinding storehouse 12, and well unloading is provided with discharge gate 14 on the storehouse 13, and discharge gate 14 department is provided with fortune material chute 2, is provided with conveyer belt 21 in the fortune material chute 2. One end of the conveyor belt 21 is connected with a bucket elevator 3, the bucket elevator 3 is communicated with a powder concentrator 4, the powder concentrator 4 is provided with a finished product bin 5, the powder concentrator 4 is provided with a feed back port 41, and the feed back port 41 is connected with a sorting mechanism 6 through a pipeline. 11 one end in corase grind storehouse 8 is provided with stoving storehouse 8, it all is provided with reprocessing mouth 15 on storehouse 8 and the fine grinding storehouse 12 to dry, reprocessing all is connected with feed back pipeline 7 between mouthful 15 and the sorting mechanism 6, it sets up with 11 intercommunications in corase grind storehouse 8 to dry the storehouse, it has waste heat pipeline 81 to dry the intercommunication on the storehouse 8, refer to fig. 3, be provided with stoving rotary drum 82 in the stoving storehouse 8, stoving rotary drum 82 outer wall is provided with a plurality of shrinkage pools 85, shrinkage pools 85's setting can be so that the outer wall of stoving rotary drum 82 and the area of contact increase between the heat conduction chamber 83, make the heat in the heat conduction chamber 83 can be faster transmit to stoving rotary drum 82 on, thereby. Drying drum 82 and corase grind storehouse 11 an organic whole sets up, and drying storehouse 8 rotates with drying drum 82 to be connected, and is provided with heat conduction chamber 83 between drying drum 82 and the 8 inner walls in drying storehouse, and heat conduction chamber 83 and waste heat pipeline 81 intercommunication set up. The quality of the raw materials can be improved by the raw materials dried by the drying bin 8, and the condition that the quality of the raw material grinding finished product is reduced due to the fact that the moisture content in the raw materials is too large is prevented.

Referring to fig. 2 and 3, in order to improve the drying efficiency, a plurality of stirring blades 84 are disposed on the inner wall of the drying drum 82 at equal intervals, the plurality of stirring blades 84 are arc-shaped pieces, and the plurality of arc-shaped stirring blades 84 are in a spiral feeding shape toward the rough grinding bin 11. Stirring vane 84's setting can be so that raw and other materials by intensive mixing when drying in stoving rotary drum 82, makes raw and other materials fully turned, makes raw and other materials fully contact with the heat in stoving storehouse 8 for various raw materials in stoving storehouse 8 can be by even stoving, has strengthened the stoving effect. The setting of arc piece can make raw and other materials present whole to 11 directions movements in the corase grind storehouse when stirring, has avoided the raw materials dwell time overlength can't get into the inside condition emergence in corase grind storehouse 11 in stoving rotary drum 82.

Referring to fig. 2 and 3, in order to prevent the unqualified raw materials in the feed back pipeline 7 from falling down and impacting the pipeline, a buffer bent pipe 91 is arranged at the feed back port 41, and the buffer bent pipe 91 is connected with the feed back port 41 and the feed back pipeline 7 through flanges. And a buffer plate 9 is arranged on the inner wall of the material return pipeline 7, and the buffer plate 9 is inclined downwards. A guide plate 92 is arranged on the buffering bent pipe 91 and opposite to the material return pipeline 7, the guide plate 92 inclines towards the material return port 41, and the guide plate 92 is connected with the buffering bent pipe 91 through a flange. When the buffering return bend 91 produced the damage under long-time material impact, the staff can only change buffering return bend 91 to avoid changing the condition of whole pipeline, reduced the material extravagant. The arrangement of the buffer plate 9 can make the raw materials blocked when falling in the material return pipeline 7, thereby reducing the impact force generated when the raw materials fall and prolonging the service life of the pipeline. The setting of deflector 92 can carry out the guide effect to the material, prevents that the material from producing in return bend corner and piling up, simultaneously because the material of whereabouts can impact deflector 92 at first when assaulting buffering return bend 91, the damage that buffering return bend 91 produced under the material is assaulted will be comparatively concentrated with deflector 92 on, the staff just can only change deflector 92 in order to reach the maintenance to buffering return bend 91 to further save material.

The implementation principle of the embodiment is as follows: when raw materials are ground by using the unloading mill 1, the raw materials firstly enter the drying rotary drum 82, a heat conduction cavity 83 is formed between the drying rotary drum 82 and the drying bin 8, waste heat generated in a production line in a waste heat pipeline 81 can be used as a heat source to be supplied to the heat conduction cavity 83 in the drying bin 8, heat in the heat conduction cavity 83 can be further conducted to the drying rotary drum 82, the raw materials can enter the coarse grinding bin 11 after being dried in the drying rotary drum 82, the raw materials enter the fine grinding bin 12 after being coarsely ground, the raw materials are further ground in the fine grinding bin 12, the quality of the raw materials can be greatly improved through two times of grinding, then the raw materials which are finely ground are discharged from a discharge port 14 on the unloading bin 13 to a conveyor belt 21 in the material conveying chute 2 and are conveyed to the bucket elevator 3, the raw materials are conveyed to the powder selector 4 under the action of the bucket elevator 3, the powder concentrator 4 can screen the ground raw materials, the raw materials meeting the standard can enter the finished product bin 5, the raw materials not meeting the use standard of the raw materials can be discharged from the feed back port 41, the materials needing to enter the coarse grinding bin 11 and the materials needing to enter the fine grinding bin 12 are respectively separated under the action of the sorting mechanism 6, and the sorted materials can respectively move to the coarse grinding bin 11 and the fine grinding bin 12 in the feed back pipeline 7.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a circulation screening raw material grinds system, includes unloading mill (1) in, unloading mill (1) includes corase grind storehouse (11), fine grinding storehouse (12), corase grind storehouse (11) with unload storehouse (13) in being provided with between fine grinding storehouse (12), in unload and be provided with discharge gate (14) on storehouse (13), discharge gate (14) department is provided with fortune material chute (2), fortune material chute (2) intercommunication has bucket elevator (3), the intercommunication has powder concentrator (4) on bucket elevator (3), the intercommunication has finished product storehouse (5) on powder concentrator (4), just be provided with feed back mouth (41) on powder concentrator (4), feed back mouth (41) pipeline intercommunication has sorting mechanism (6), its characterized in that: rough grinding storehouse (11) one end is provided with stoving storehouse (8), stoving storehouse (8) with fine grinding storehouse (12) is gone up and all is provided with reprocessing mouth (15), reprocessing mouth (15) with all be connected with feed back pipeline (7) between sorting mechanism (6), stoving storehouse (8) with rough grinding storehouse (11) intercommunication sets up, the intercommunication has waste heat pipeline (81) on stoving storehouse (8), be provided with stoving rotary drum (82) in stoving storehouse (8), stoving rotary drum (82) with rough grinding storehouse (11) an organic whole sets up, stoving storehouse (8) with stoving rotary drum (82) rotate to be connected, just stoving rotary drum (82) with be provided with heat conduction chamber (83) between stoving storehouse (8) inner wall, heat conduction chamber (83) with waste heat pipeline (81) intercommunication sets up.

2. A circular screening raw mill system as claimed in claim 1, characterized in that: a plurality of stirring blades (84) are arranged on the inner wall of the drying rotary drum (82) at equal intervals.

3. A circular screening raw mill system as claimed in claim 2, characterized in that: the stirring blades (84) are arc-shaped pieces, and the stirring blades (84) are in a spiral feeding shape to the rough grinding bin (11).

4. A circular screening raw mill system as claimed in claim 3, characterized in that: the outer wall of the drying rotary drum (82) is provided with a plurality of concave holes (85).

5. A circular screening raw mill system as claimed in claim 4, characterized in that: a conveyor belt (21) is arranged in the conveying chute (2).

6. A circular screening raw mill system as claimed in claim 5, characterized in that: the inner wall of the feed back pipeline (7) is provided with a buffer plate (9), and the buffer plate (9) is inclined downwards.

7. A circular screening raw mill system as claimed in claim 6, characterized in that: and a buffer bent pipe (91) is arranged at the reworking port (15), and the buffer bent pipe (91) is in flange connection with the reworking port (15) and the return pipe (7).

8. A circular screening raw mill system as claimed in claim 7, characterized in that: a guide plate (92) is arranged on the buffering bent pipe (91) and is opposite to the material return pipe, the guide plate (92) inclines towards the reprocessing port (15), and the guide plate (92) is in flange connection with the buffering bent pipe (91).

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