CN104540591A - Vertical roller mill - Google Patents
Vertical roller mill Download PDFInfo
- Publication number
- CN104540591A CN104540591A CN201380006355.5A CN201380006355A CN104540591A CN 104540591 A CN104540591 A CN 104540591A CN 201380006355 A CN201380006355 A CN 201380006355A CN 104540591 A CN104540591 A CN 104540591A
- Authority
- CN
- China
- Prior art keywords
- classification device
- wind force
- grinding
- roller mill
- force classification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000227 grinding Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/007—Mills with rollers pressed against a rotary horizontal disc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to a vertical roller mill having a driven grinding plate and at least two stationary grinding rollers rolling on the grinding board. In order to improve the energy efficiency, instead of a separator basket traditionally provided in the upper housing region, the step to smaller separators in close proximity to the respective grinding roller is carried out, which substantially reduces the transport distance of the ground mill material. In addition, a guide device for the ground mill material is formed such that a recirculation of finely ground material is, for the most part, prevented.
Description
Technical field
The present invention relates to vertical roll grinder as described in the preamble according to claim 1.
Background technology
Vertical lapping machine (or also referred to as vertical roll grinder) well known (WO2005/028112A1, DE3100341A1).Described vertical lapping machine has around vertical axis thereof, the classification basket of classifying for the fines-admixture of gas upwards carried in air-flow at the upper area of grinder housing.
In processing, because this type of vertical lapping machine needs the handling capacity that day by day increases, therefore the parts such as such as grinding table, mixing roll, classification basket all adopt increasing size.Therefore, due to the size of parts, make parts not be re-used as a unit to a certain extent but on the contrary only can as sub-cutting unit (itself once reach vertical roll grinder make land used, just must combine or weld together) manufacture.
Except these aspects, also need increasing gas volume and corresponding fan, such as the gas of heat can be blown into as transport and dry gas via annular gap, particularly can realize abrasive grains and to arrive through the whole height of roller mill the upwards conveying at basket place of classifying.
Another kind contributes to vertical lapping machine (DE19718668C2) the horizontal classification device in the upper area of its grinding housing being separated the composition being difficult to scattered material blends and exporting, it is around horizontal axis, and contributes to exporting fines from grinding and classification process with this.
Therefore, can suppose to have known and use one or more horizontal classification device in vertical roll grinder.
But in energy, this class formation also has following problem: namely, larger gas volume is provided, these particles roughly can be transported in the horizontal classification device be arranged in upper area through the whole height of vertical lapping machine housing for carrying the abrasive substance particle of overmastication.
Summary of the invention
Therefore, the object of the invention is to design a kind of vertical lapping machine as follows, vertical roll grinder specifically: namely, even if when vertical lapping machine is day by day large-scale and handling capacity is higher, especially grader parts can realize with a unit or multiple unit, and can avoid the significantly increase of transport and the energy needed for dry gas.
According to the present invention, this object can be realized by feature according to claim 1.The preferred embodiments of the present invention will be claimed in the dependent claims.
Can find out, the material granule that taproot thought of the present invention is highly shortened overmastication leads to the transmission path of grader, thus there will not be higher energy requirement for required pressure and gas volume.
On the one hand, this by the classification basket skew that makes to be arranged in grinder housing upper area and the vicinity alternatively more small-sized grader (being the grader of horizontal classification device or slight slope specifically) being arranged on roller realize.
Can find out, another basic thought of the present invention is, for the grinding-material by mixing roll overmastication, arrange and be used in the gas flow by the guidance unit that the abrasive substance particle of more refinement is upwards carried, wherein said guidance unit contributes to the spiral charging to each horizontal classification device.
Due to horizontal classification device or that more small-scale structure unit (wherein these graders are arranged on the vicinity of roller) with the more small sortation device of titling axis, therefore the vertical roll grinder with rotary grinding table and at least two fixed mixing rolls rolled on abrasive disk designed by this way brings more effective using energy source with regard to required transport and dry gas, or even the saving of the energy.
In order to carry the abrasive substance particle upwards carried in the gas flow better, this corresponding horizontal classification device and the combination of bending guidance unit reduce or avoid the interior recirculation of abrasive substance particle of (depending on the circumstances) over-lapping, thus can realize energy consumption reduction.
Wind force classification device or horizontal classification device and guidance unit are advantageously distributed to each mixing roll, thus avoids recirculation flow widely.
But also can expect, replace the way of distributing separately horizontal classification device to each mixing roll, the uprising gas of such as two mixing rolls-abrasive substance particle stream can also be pooled together.Therefore, in the example of grinder with four mixing rolls, it will also be appreciated that the structure with two horizontal classification devices, wherein two mixing rolls combined in a pair distributed to by each horizontal classification device.
The improvement relevant with flowing can also be realized by the mode being set to offset in the front of corresponding mixing roll by each wind force classification device.In configuration aspects, as shown in Figure 1, therefore wind force classification device can offset relative to the longitudinal axis being directed across each mixing roll center, on the direction at mixing roll rear that wherein this grinding-material occurring in overmastication occurs.The advantage that there is that each wind force classification device offsets relative to corresponding mixing roll is: the abrasive substance particle appearing at the grinding-material of mixing roll rear (can say so) overmastication can by which better for upwards carrying the guidance unit of the grinding-material of refinement upwards to drive in the gas flow, and can be transported in distributed horizontal classification device by mode more targetedly.
In order to improve the transmission to the abrasive substance particle upwards carried, the collection channel that guidance unit is configured to bending-type guided plate or extends in a curved fashion, in order to be transported to spiral for particle in the classification basket of wind force classification device.In hydrodynamics, the conveying with the classification basket of corresponding wind force classification device with the abrasive substance particle of identical direction of rotation can realize via relatively short distance thus, thus realizes the good classification to abrasive substance particle.
As long as provide bending collection channel for the abrasive substance particle upwards transmitted, then this passage will reduce towards the cross section on wind force classification device direction, consider the flowing velocity increased in this region and the centrifugal force acted on herein thus, can realize classifying in advance to the one of coarse fodder.Comprise the coarse granule rejected by the classification basket of wind force classification device, these coarse fodders move to the recirculation unit be arranged on below wind force classification device, and are again transported in milled processed.Recirculation unit is advantageously formed as funnel-form cone, and the coarse fodder rejected thus is fed back on the recirculation unit that tilts towards center (preferably the large centre about grinding table).
The structure of wind force classification device or horizontal classification device by can build plain mode, connect via the conventional inboard central discharge air pipeline for gas-fines stream, thus make feed pipe be enough to be used in downstream unit (such as cyclone separator or dust filter) to carry gas-fines stream.
According to the design of whole vertical lapping machine, each wind force classification device can be equipped with the independently outside discharge pipe line for classification gas-fines mixture.By this zoned format, independence preparation difference being expected to the abrasive substance particle of rank can be taked.
Although incorporate multiple wind-force or horizontal classification device, the grinding-material feeding of central authorities can be realized in the structure of vertical lapping machine, although make to there is multiple wind force classification device, there will not be the resource increasing cost.
This vertical lapping machine being designed with horizontal tectonics or oblique wind grader (specifically, distributing to the wind force classification device of mixing roll respectively) is conducive to the transmission path of the abrasive substance particle shortening overmastication.According to technical scheme of the present invention, significantly can improve milled processed and for this reason required energy resource, this especially because the whole height of vertical lapping machine is less and lower, and avoids the recirculation of the abrasive substance particle to overmastication as far as possible on a large scale.Compared with the static classifiers in vertical lapping machine upper area, horizontal or tilting wind force classification device improve the classification to refiner material particle.
Because the abrasive substance particle transmission path upwards making overmastication shortens, therefore, even if when around blade ring in the annular gap of grinding table, gas volume and required pressure also can be reduced, thus realizes energy conservation.
Accompanying drawing explanation
The present invention will be described in more detail to use illustrative examples below.
Fig. 1 shows the part section of vertical lapping machine, is provided with grinding table, the mixing roll be positioned on grinding table in this region, and is arranged on the horizontal classification device near roller.Shown section approximately corresponds to the section of 90 °, and it also can be the section of about 140 ° of the outline relative to mixing roll.Based on the rotating shaft of grinding table, show mixing roll and inner side view thereof, and the left side district of Fig. 1 shows the side view with the second mixing roll of schematic rocking arm structure in the region of grinding table edge and annular gap.
Detailed description of the invention
Fig. 1 schematically illustrates according to vertical roll grinder 1 of the present invention with broken section.
This detailed sectional view passes through to become the arc section section of about 90 ° to show vertical roll grinder 1 between the vertical axis of two adjacent mixing rolls 4 (the two about 90 ° of skew).Therefore, whole arc section section is larger to a certain extent, is approximately 140 °.
In lower area, show grinding table 2, it has the rotation direction D round rotating shaft 3.Two mixing rolls 4 are arranged on grinding table 2, and the mixing roll 4 being wherein arranged in rotating shaft 3 in map sheet plane shows with the direction of from inside to outside looking.Be arranged in mixing roll 4 in the left side district of roller mill 1 or left side by showing towards side view by the visual angle of the suspension of rocking arm of cone roller shell and mixing roll.
Radially outward edge around grinding table 2 is provided with annular gap 17, and described annular gap 17 has blade ring usually, and for transport and dry gas 19 are blown into as air-flow.
To be comminuted and grinding, can to concentrate importing grinding-material 13 is fed into mixing roll 4 place via the rotation D of grinding table 2, and by pressure and the pulverizing of consequent shearing force of mixing roll, make the grinding-material of overmastication appear at (left side) after mixing roll 4 thus.
In the milled processed of reality, the new grinding-material 13 of importing and the grinding-material 14 of overmastication define mixture, and this mixture constitutes the lapping machine 15 in the outer peripheral areas of grinding table 2.
In order to avoid carrying out excessive roll extrusion or the overmastication of repetition to the grinding-material pulverized; technique is done following regulation: namely; sending in the uprising gas-abrasive substance particle mixture 21 after respective mixing roll 4 via being blown into the volume fractiion large as far as possible of air-flow 19 by fines and abrasive substance particle, being fed into immediately in corresponding wind force classification device 7.
Due to the power locking between lapping machine 15 and friction lock, carry out the rotary motion DW identical with grinding table 2 direction with the mixing roll 4 of fixed form structure.
According to the present invention, to imagine near each mixing roll 4 (above it), large the more small-sized wind force classification device 7 with trunnion axis 9 (also can be inclined shaft) be set with offseting about the direction of rotation D of grinding table 2 on.The corresponding horizontal classification device 7 with rotary drive formula classification basket 8 obtains the grinding-material of the overmastication of upwards carrying in air-flow 19 thus via relatively short distance.
Therefore, arrived the classification basket place in the upper area being arranged on grinder housing in order to gas-abrasive grains mixture is carried the whole grinding chamber of vertical lapping machine, do not need the air-flow 19 that pressure and volume are all higher.
According to the present invention, except by being arranged on except the mode reduced the distance near mixing roll 4 by wind force classification device 7, also can guidance unit 25 be additionally set, such as guided plate 26 or collection channel 27.Therefore, uprising gas grain flow is collected by this guidance unit 25 and directed targetedly, wherein along wind force classification device 7 direction and curved design around wind force classification device 7 further increases spiral conveying.The reduction of the cross section of guiding channel 27 also contributes to this point.Uprising gas-abrasive grains mixture 21 occurs in in the identical direction of rotation of wind force classification device self to the feeding of wind-force grader 7, thus achieves well fines and the classification rejecting coarse fodder at classification basket 8 place.
As shown in district on the left of Fig. 1, the fines sorted out in classification basket 8 can be used as fines 29 subsequently and outwards guides (pneumatically being guided specifically), and be transported in central feed tube thus, or be transported in the downstream units of such as cyclone or filter by the independent line of dispersion.
Shown wind force classification device 7 has feathering axis.Also can be the rotating shaft tilted, the inclination wherein towards grinding table center in axial rotary also contributes to discharging of fines.On the other hand, the inclination of rotating shaft on the suspended wall and rocking arm direction of corresponding mixing roll 4 of wind force classification device 7 contributes to the fines through sorting out to output in the central upper region of roller mill, thus sets up central type discharge for fines.
Funnel-form cone 31 is set to the recirculation unit of material, in order to be recycled in the approximate centre region of grinding table 2 by the coarse fodder 32 of rejection.
Vertical lapping machine according to structure of the present invention, namely there is the wind force classification device 7 that is arranged near mixing roll 4 and be combined with guidance unit 25, owing to avoiding the recirculation to overmastication particle widely, therefore allowing efficient milled processed.In addition, due to the short path between lapping machine and existing wind force classification device 7, therefore also there is lower conveying gas volume and low gas pressure.Equally, because the forming types of vertical roll grinder according to the present invention is lower than conventional vertical lapping machine, therefore for this roller mill integral installation needed for investment level lower.
Claims (12)
1. a vertical roll grinder (1), has:
The mixing roll (4) that upper at least two of rolling of driven grinding table (2) and the lapping machine (15) in grinding-material (13) are fixing,
Around the annular gap (17) of described grinding table (2), its for be blown into for carry and/or drying through the gas (19) of the abrasive substance particle (21) of the grinding-material of overmastication,
Multiple wind force classification device (7), the abrasive substance particle (14) upwards carried in described air-flow (19) is categorized into the coarse fodder (32) of fines (29) and recirculation by it, the grader axle (9) that wherein said wind force classification device (7) is configured with level substantially or the grader axle tilted
It is characterized in that,
Described wind force classification device (7) is arranged near described mixing roll (4) top, at least one guidance unit (25) had for carrying the abrasive substance particle (14) upwards carried in described air-flow (19) to described wind force classification device (7) and each mixing roll (4) is all attached troops to a unit.
2. roller mill according to claim 1, is characterized in that,
Each mixing roll (4) is all attached troops to a unit wind force classification device (7) and guidance unit (25).
3. roller mill according to claim 1 and 2, is characterized in that,
Wind force classification device (7) described in each is arranged to offset on the direction of the grinding-material (14) of described overmastication relative to the longitudinal axis (3) at the center (5) through respective described mixing roll (4).
4. roller mill according to any one of claim 1 to 3, is characterized in that,
Described guidance unit (25) has for the bending guided plate (26) be transported to spirally by abrasive substance particle (14) in the classification basket (8) of described wind force classification device (7) or the collection channel (27) bent.
5. roller mill according to claim 4, is characterized in that,
The channel cross-section that described bending collection channel (27) is formed towards or reduces around described wind force classification device (7).
6. roller mill according to any one of claim 1 to 5, is characterized in that,
The large At The Height about the upper area place of described mixing roll (4) of described guidance unit (25) has for described abrasive substance particle (14,19) the inflow district of described collection channel (27), and described guidance unit is arranged in the rear area of respective mixing roll (4).
7. roller mill according to any one of claim 1 to 6, is characterized in that,
The flow direction of described abrasive substance particle (14,19) is corresponding with the direction of rotation of described wind force classification device (7) in the region of described guidance unit (25).
8. roller mill according to any one of claim 1 to 7, is characterized in that,
Each wind force classification device (7) have for the coarse fodder (32) rejected, the recirculation unit (31) that tilts towards the center (3) of described grinding table (2).
9. roller mill according to claim 8, is characterized in that,
Described recirculation unit (31) is formed as infundibulate cone.
10. roller mill according to any one of claim 1 to 9, is characterized in that,
Described wind force classification device (7) is connected with the central emissions pipeline for making the gas through classifying-fines mixture (29) discharge the inside of described wind force classification device (7).
11. roller mills according to any one of claim 1 to 9, is characterized in that,
Described wind force classification device (7) has the independently outside discharge pipe line for the gas-fines mixture (29) through classification.
12. roller mills according to any one of claim 1 to 11, is characterized in that,
Provide the feeding of central type grinding-material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2013/067206 WO2014067688A1 (en) | 2013-08-19 | 2013-08-19 | Vertical roller mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104540591A true CN104540591A (en) | 2015-04-22 |
Family
ID=49553650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380006355.5A Pending CN104540591A (en) | 2013-08-19 | 2013-08-19 | Vertical roller mill |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2780113B1 (en) |
| JP (1) | JP2016528038A (en) |
| CN (1) | CN104540591A (en) |
| DK (1) | DK2780113T3 (en) |
| WO (1) | WO2014067688A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712326A (en) * | 2019-01-17 | 2020-09-25 | 德国莱歇公司 | Rolling rod module |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225025A (en) * | 2017-08-08 | 2017-10-03 | 江苏鹏飞集团股份有限公司 | The vertical pulverizer of Bidirectional discharging |
| CN108722626B (en) * | 2018-04-26 | 2020-04-10 | 凤冈县富源茯苓有限责任公司 | Equipment for producing poria cocos noodles |
| CN112827579B (en) * | 2021-02-05 | 2023-12-12 | 南京西普国际工程有限公司 | Screening lifting device in mill and vertical roller mill |
| CN113304829B (en) * | 2021-06-09 | 2022-08-19 | 哈尔滨商业大学 | Device for separating coarse powder and fine powder after crushing traditional Chinese medicine components |
| WO2023131393A1 (en) | 2022-01-04 | 2023-07-13 | Loesche Gmbh | Classifier assembly for a vertical roller mill |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3100341A1 (en) | 1981-01-08 | 1982-07-22 | Loesche GmbH, 4000 Düsseldorf | ROLL MILL, ESPECIALLY FOR COAL GRINDING |
| DE19718668C2 (en) | 1997-05-02 | 2003-04-03 | Hosokawa Alpine Ag & Co | Process for separating and continuously removing difficult-to-disperse components |
| DE10221739A1 (en) * | 2002-05-16 | 2003-12-04 | Kloeckner Humboldt Wedag | Circular grinding plant with mill and sifter |
| PL1675683T3 (en) | 2003-09-12 | 2011-06-30 | Loesche Gmbh | Method of operating of roller grinding mill, and method for the production of cement |
-
2013
- 2013-08-19 EP EP13788897.0A patent/EP2780113B1/en active Active
- 2013-08-19 WO PCT/EP2013/067206 patent/WO2014067688A1/en active Application Filing
- 2013-08-19 CN CN201380006355.5A patent/CN104540591A/en active Pending
- 2013-08-19 DK DK13788897.0T patent/DK2780113T3/en active
- 2013-08-19 JP JP2016535348A patent/JP2016528038A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712326A (en) * | 2019-01-17 | 2020-09-25 | 德国莱歇公司 | Rolling rod module |
| CN111712326B (en) * | 2019-01-17 | 2023-02-03 | 德国莱歇公司 | Rolling rod module |
Also Published As
| Publication number | Publication date |
|---|---|
| DK2780113T3 (en) | 2016-04-11 |
| JP2016528038A (en) | 2016-09-15 |
| WO2014067688A1 (en) | 2014-05-08 |
| EP2780113B1 (en) | 2016-01-06 |
| EP2780113A1 (en) | 2014-09-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |