WO1997009130A1 - Windsichter und einrotorige sichtermühle mit einem solchen windsichter - Google Patents
Windsichter und einrotorige sichtermühle mit einem solchen windsichter Download PDFInfo
- Publication number
- WO1997009130A1 WO1997009130A1 PCT/EP1996/003815 EP9603815W WO9709130A1 WO 1997009130 A1 WO1997009130 A1 WO 1997009130A1 EP 9603815 W EP9603815 W EP 9603815W WO 9709130 A1 WO9709130 A1 WO 9709130A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- classifier
- air
- air classifier
- cover plate
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
-
- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Definitions
- the regrind generally has a different grain size and requires classification or classification.
- the mill and sifter are combined to form a functional unit.
- the starting product is fed into the mill, at the end of the grinding process the regrind freed from the coarse material reaches the sifter, where the regrind parts with coarser and finer grain (larger and smaller mass) are separated from one another.
- the mill and classifier are subject to different working conditions, which can be taken into account without further notice or which can be created easily if the mill and classifier are structurally independent of one another.
- the criterion essential for the classifier is the degree of separation (the limit of separation) d ⁇ , for which the following relationship applies
- ERS ⁇ ZBL ⁇ (RULE 26)
- d ⁇ mean the degree of separation (the separation limit) or the particle size
- V r the radial speed in the sight wheel in m / s
- V u is the peripheral speed in the classifying wheel in m / s
- the degree of separation in the classifier is primarily dependent on two speed components, which in turn means that the speed of the classifying wheel must be changeable if the classifier working area should not be so small that the classifier operation is inefficient.
- the present invention is based on the desire to solve the problem in a more appropriate manner. It is therefore the object of the invention, starting from a classifier mill, to show a possibility of how a beater mill and a classifier can be combined to form a unitary device with only one drive, but nevertheless the mill and classifier can be regulated independently of one another with reasonable effort can.
- the starting point for solving this problem is the mathematical relationship given above.
- the problems on which the present invention is based can be defined in general terms as follows.
- the degree of separation as an essential criterion of an air classifier is essentially dependent on the speed of the classifier wheel.
- the controllability of the speed of the classifier wheel is therefore a prerequisite for the economical use of a wind sifter.
- cases are conceivable in which it is not readily possible to determine the speed of the classifying wheel in such a way that a desired degree of separation is achieved in an optimal manner. It is therefore an object of the present invention to design an air classifier such that, alternatively or in addition to changing the degree of separation, the degree of separation can be changed or an optimal degree of separation can be achieved by changing the speed of the classifying wheel.
- degree of separation is synonymous with “determination of the separation limit”, i.e.
- the invention thus amounts to two solution variants, both of which are based on the mathematical relationship given.
- the clear height of the sight space of an air classifier is adjustable
- the fine material outlet of the classifier is designed as an adjustable panel.
- both possible solutions according to the invention can be implemented with relatively little structural effort.
- a unit with a mill and classifier is assumed, in which the motor output can be changed with due regard to the necessary speed of the mill, the classifier is also driven at this speed, but the working conditions of the classifier are changed independently of the mill can.
- the description also applies to the person skilled in the art when it is all about a wind sifter whose degree of separation should be changeable in spite of constant speed.
- FIG. 1 shows a single-rotor classifier mill as a central longitudinal section, in which, according to the invention, one of the two cover plates of the classifier is designed as an adjustable cover or this one of the two cover plates, namely the cover plate on the fine material outlet side, has such a cover;
- FIG.la a detail of the arrangement of FIG. 1 and
- Fig. 2 in the same representation a sifter mill, in which the single cover plate of the sifter is adjustable in height in order to be able to change the clear height of the viewing space by adjusting this one cover plate.
- the single-rotor classifier mill according to FIG. 1 has the rotor 1 in a manner known per se, which includes a disk 2a with striking tools 2 on its outer circumference and a cover disk la of the classifier with the classifier blades 4 firmly connected to it.
- the striking tools work together with a material web 3 on the inside of the housing of the device.
- the ground material which is reduced in the interaction between percussion tools 2 on the one hand and grinding track 3 on the other hand, together with classifying air, reaches the channels between the viewing blades 4, the cover plate 1 a and the second cover plate 7 on the outlet side of the classifier, where the sighting takes place in coarse and fine goods.
- the fine material ie the ground product with a relatively low mass, is radially from the outside against the effect of centrifugal force from the outside to the inside through the classifying wheel, ie.
- Further essential components of the classifier mill are guide vanes 8, a housing 13 with a housing opening closed by a door 9 during operation, the pneumatic product inlet 10, the sight air inlet 11 and the drive motor 12. If the rotor 1 is rotated by means of the motor 12 in the stationary housing 13 of the classifier mill with the door 9 closed, the starting product passes through the product inlet 10 into the area of influence of the striking tools 2, the starting product is broken down into coarse and fine material, coarse - and fines are treated in the manner already described.
- the product-related mode of action of the striking tools depends on the speed of the mill parts with the disk 2a and the striking tools attached to it. This speed is dependent on the speed of the motor 12, it being possible for a change in the speed of the mill to be effected by changing the motor speed itself or at a constant speed of the motor by means of a reduction and / or reduction gear. With the speed of the mill, the speed of the classifying wheel with the cover plate 1a directly connected to the plate 2a, the classifying blades 4 and the cover plate 7 is also determined, if necessary changed. In order to be able to change the degree of separation of the classifier in spite of this dependency, the cover disk 7 is designed as an iris diaphragm known per se.
- the outlet cross-section 6 can be changed, and the iris diaphragm is a preferred means of being able to determine the circumferential speed of the fine material in such a way that regardless of the determined or selected mill speed, which is intended to ensure optimal working of the mill, under Taking into account the formula given above, an optimal degree of separation of the classifier is possible.
- the sifter mill according to FIG. 2 is basically the same in structure and in its mode of operation as a mill and sifter.
- the mill is in turn essentially formed by the rotor 1 with the mill disk 2a and the striking tools 2 attached to it, while the sifter or the sifter wheel is essential is characterized by a telescopically adjustable length 14 cylinder with bottom 15, cylinder wall 16, outlet-side, adjustable cover plate 17 and the classifying blades 4.
- One part 14a of the cylinder 14 with the base 15, which is connected to the disc 2a, and the inner cylinder wall section 16a carries the blades 4 of the visible blade ring at the free end of the cylinder wall section 16a.
- the other part 14b of the cylinder 14 with the cover plate 17 and the outer cylinder wall section 16b engages with the free end of the outer cylinder wall section 16b telescopically in the direction of the double arrow 19, continuously adjustable via the inner cylinder wall section 16a and delimits the viewing chamber 20 between this cover plate with the cover plate 17 17 of the housing wall 13 * with the fine material outlet 6 arranged centrally to the classifying wheel and the free, ie not covered by the outer cylinder wall section 16b parts or sections of the blades 4.
- the cover plate 17 as part of the other part 14b of the cylinder 14 is the clear height H of the viewing chamber 20 changeable.
- the blades 4 should not obstruct the adjustment movements of the cover disk 17, but should be guided through slots in the cover disk 17 in a fluid-tight manner, and there is an abrasion-resistant sliding seal between the parts 16a, 16b.
- the parts 16a, 16b thus form an annular diaphragm surrounding the blades with two ring diaphragm sections which are telescopically adjustable with respect to one another.
- the cover disk 17 of the cylinder part 14b has a hub 21 with which the cylinder part 14b is arranged on a shaft 22 in a rotationally fixed manner.
- the telescopic adjustability of the cylinder part 14b and thus of the cover disk 17 is brought about in that this shaft 22 is connected in a rotationally fixed manner to the output shaft 23 of the motor 12, but is axially displaceable relative to this output shaft 23, for example by both shafts by one known keyway coupling 24 are interconnected.
- One of the two shafts is designed as a hollow shaft with longitudinal grooves in the inner wall or longitudinal ribs on the inner wall, the other of the two shafts as a solid shaft with corresponding longitudinal wedges on the outer wall or longitudinal grooves in the outer wall.
- the axial displacement of the shaft designed as the solid shaft relative to the motor output shaft designed as the hollow shaft is indicated by the double arrow 19.
- the motor output shaft may be directly the shaft led out of the motor 12, it may be connected to the motor output shaft via a gear or it may be connected to the shaft led out of the motor via other suitable and known means, for example a belt drive.
- 25 is a sliding guide between the two shafts 22, 23 in their smooth sections. In this case, the driving force from the motor 12 is introduced once via the motor output shaft 23 into the rotor 1, into the cylinder or the ring diaphragm 14 formed by it, into the classifying wheel blades 4 and into the cover disk 17 and once via the shaft 22 directly into the cover disk 17.
- the shaft 22 is driven by the cover disk 17 driven by the shaft 23, if namely the connection between hub 21 and shaft 22 is rotationally fixed, or if the keyway coupling 24 in favor of a further guide bearing (corresponding to the sliding guide collar 25) and the torsional strength of the connection between hub 21 and shaft 22 is dispensed with, the shaft is exclusive axially adjustable, in this case it is only necessary to ensure that in the event of axial displacements of the shaft 22 in the directions of the double arrow 19 this shaft 22 takes the cover plate 17.
- the iris diaphragm in the cover disk 7 in the embodiment according to FIG. 1 is a known assembly, such a diaphragm is shown schematically in the partial figure la, namely on a larger scale and in the direction of the one leaving the classifier. seen with fine material sight air flow. It is a perforated diaphragm with a variable hole cross section, this change in the cross section of the hole 100 being possible in that between approximately 6 and approximately 30 crescent-shaped Lamella sheets 101 with their one inner ends 102 are parts of the circumference of the hole 100 and are assigned at their other ends to an infinitely adjustable adjusting ring 103 which is rotatably mounted in the actual cover disk 7 in the direction of the double arrow 104.
- the lamella plates 101 can be pivoted such that the cross section of the hole 100 becomes larger or smaller and changes the exit cross section of the fine material outlet 6 accordingly becomes.
- the adjusting ring 103 is rotated from the outside by known means, for example by an actuator or a simple, manually operated linkage.
- FIGS. 1, 2 denotes a guide ring which interacts with the guide vanes 8.
- the sight air entering through the sight air inlet 11 arrives in the annular space between the guide ring 5 and the housing wall in the guide vane ring 8 and is diverted there into a corresponding counterflow between the guide ring 5 and classifier wheel in order to come in from outside with the sight material introduced via the sight goods inlet 10 to get the flow channels between the blades of the classifier wheel, where the separation into fine and coarse material takes place.
- the classifying air with fine material leaves the classifier via the outlet 6, the coarse material is rejected by the centrifugal force in the inlet area of the flow channels between the blades of the classifying wheel and brought further through the annular space between the guide ring 5 and classifying wheel into the area of action of the mill.
- this cover plate 7 with the adjustable aperture can also be separated from the classifying wheel and assigned to the housing 13, in particular the cover 9.
- This solution can be expedient because the cover plate 7 with the cover can have a higher weight than simple cover plates, for which no additional drive energy is required if the cover plate is separated from the classifying wheel and assigned to the housing.
- the invention can be defined in such a way that two preferred solutions to the problem are shown of how the separating limit of the classifier can be changed in a wind classifier in operating phases of constant speed of the classifying wheel.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Centrifugal Separators (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59609098T DE59609098D1 (de) | 1995-09-04 | 1996-08-30 | Windsichter und einrotorige sichtermühle mit einem solchen windsichter |
EP96930138A EP0850110B1 (de) | 1995-09-04 | 1996-08-30 | Windsichter und einrotorige sichtermühle mit einem solchen windsichter |
JP9510840A JPH11512024A (ja) | 1995-09-04 | 1996-08-30 | 風選装置および該風選装置を有する単ロータ式選別粉砕機 |
BR9610389-2A BR9610389A (pt) | 1995-09-04 | 1996-08-30 | Separador de ar e moinho de separação de um só rotor com este separador de ar |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19532555.9 | 1995-09-04 | ||
DE19532555 | 1995-09-04 | ||
DE19535524.5 | 1995-09-25 | ||
DE19535524A DE19535524A1 (de) | 1995-09-04 | 1995-09-25 | Windsichter und einrotorige Sichtermühle mit einem solchen Windsichter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997009130A1 true WO1997009130A1 (de) | 1997-03-13 |
Family
ID=26018269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003815 WO1997009130A1 (de) | 1995-09-04 | 1996-08-30 | Windsichter und einrotorige sichtermühle mit einem solchen windsichter |
Country Status (6)
Country | Link |
---|---|
US (1) | US5899396A (de) |
EP (1) | EP0850110B1 (de) |
JP (1) | JPH11512024A (de) |
CN (1) | CN1071601C (de) |
BR (1) | BR9610389A (de) |
WO (1) | WO1997009130A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1193000A2 (de) * | 2000-09-27 | 2002-04-03 | Xerox Corporation | Element und Vorrichtung zur Trennung von Partikeln |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006017472A1 (de) * | 2006-04-13 | 2007-10-18 | Nied, Roland, Dr. Ing. | Verfahren zur Erzeugung feinster Partikel mittels einer Strahlmühle |
JP4516054B2 (ja) * | 2006-07-06 | 2010-08-04 | 仁 鴻 張 | 粉砕機 |
CA2859455C (en) * | 2011-12-16 | 2020-01-07 | Lafarge | Grinding process and unit, and corresponding production process of a hydraulic binder |
CN104226440B (zh) * | 2013-06-08 | 2016-08-31 | 江苏密友粉体新装备制造有限公司 | 高效节能气流粉碎机 |
CN107116029B (zh) * | 2017-05-15 | 2019-02-01 | 重庆电子工程职业学院 | 一种自动涡轮分选机 |
CN108479957B (zh) * | 2018-04-19 | 2023-11-17 | 黄河科技学院 | 化学实验用粉煤灰分层粉碎装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2367906A (en) * | 1942-01-09 | 1945-01-23 | Wall | Apparatus for separating wood flour |
US3015392A (en) * | 1959-08-14 | 1962-01-02 | Microcyclomat Co | Vertical feed centripetal classifier |
US3237766A (en) * | 1960-10-21 | 1966-03-01 | Ass Portland Cement | Mechanical air classifier |
EP0023320A1 (de) * | 1979-07-17 | 1981-02-04 | Onoda Cement Company, Ltd. | Windsichter |
SU994056A1 (ru) * | 1981-05-06 | 1983-02-07 | Ивановский Ордена "Знак Почета" Энергетический Институт Им.В.И.Ленина | Центробежный сепаратор |
DE3808023A1 (de) * | 1988-03-10 | 1989-09-21 | Krupp Polysius Ag | Sichter |
EP0369399A2 (de) * | 1988-11-17 | 1990-05-23 | Roland Dr.-Ing. Nied | Windsichter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH425684A (de) * | 1965-09-13 | 1966-12-15 | Escher Wyss Ag | Streusichter, insbesondere für Zement |
GB2163070A (en) * | 1984-08-13 | 1986-02-19 | Smidth & Co As F L | Separator for sorting particulate material |
GB2176134A (en) * | 1985-06-03 | 1986-12-17 | Smidth & Co As F L | Separator for sorting particulate material |
DE4101343C1 (de) * | 1991-01-18 | 1992-01-02 | Pallmann Maschinenfabrik Gmbh & Co Kg, 6660 Zweibruecken, De | |
DE4423815C2 (de) * | 1994-07-06 | 1996-09-26 | Loesche Gmbh | Mühlensichter |
-
1996
- 1996-08-21 US US08/701,161 patent/US5899396A/en not_active Expired - Fee Related
- 1996-08-30 BR BR9610389-2A patent/BR9610389A/pt not_active IP Right Cessation
- 1996-08-30 WO PCT/EP1996/003815 patent/WO1997009130A1/de active IP Right Grant
- 1996-08-30 CN CN96196734A patent/CN1071601C/zh not_active Expired - Fee Related
- 1996-08-30 EP EP96930138A patent/EP0850110B1/de not_active Expired - Lifetime
- 1996-08-30 JP JP9510840A patent/JPH11512024A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2367906A (en) * | 1942-01-09 | 1945-01-23 | Wall | Apparatus for separating wood flour |
US3015392A (en) * | 1959-08-14 | 1962-01-02 | Microcyclomat Co | Vertical feed centripetal classifier |
US3237766A (en) * | 1960-10-21 | 1966-03-01 | Ass Portland Cement | Mechanical air classifier |
EP0023320A1 (de) * | 1979-07-17 | 1981-02-04 | Onoda Cement Company, Ltd. | Windsichter |
SU994056A1 (ru) * | 1981-05-06 | 1983-02-07 | Ивановский Ордена "Знак Почета" Энергетический Институт Им.В.И.Ленина | Центробежный сепаратор |
DE3808023A1 (de) * | 1988-03-10 | 1989-09-21 | Krupp Polysius Ag | Sichter |
EP0369399A2 (de) * | 1988-11-17 | 1990-05-23 | Roland Dr.-Ing. Nied | Windsichter |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED Section PQ Week 8430, 5 September 1984 Derwent World Patents Index; Class P43, AN 84-186593, XP002020844 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1193000A2 (de) * | 2000-09-27 | 2002-04-03 | Xerox Corporation | Element und Vorrichtung zur Trennung von Partikeln |
EP1193000A3 (de) * | 2000-09-27 | 2002-10-16 | Xerox Corporation | Element und Vorrichtung zur Trennung von Partikeln |
US6776291B1 (en) | 2000-09-27 | 2004-08-17 | Xerox Corporation | Article and apparatus for particulate size separation |
EP1193000B2 (de) † | 2000-09-27 | 2009-11-11 | Xerox Corporation | Element, Vorrichtung, Verfahren und Bausatz zur Trennung von Partikeln |
Also Published As
Publication number | Publication date |
---|---|
CN1071601C (zh) | 2001-09-26 |
JPH11512024A (ja) | 1999-10-19 |
US5899396A (en) | 1999-05-04 |
BR9610389A (pt) | 1999-08-31 |
EP0850110B1 (de) | 2002-04-17 |
CN1195303A (zh) | 1998-10-07 |
EP0850110A1 (de) | 1998-07-01 |
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