EP0680788B1 - Rohrmühle - Google Patents
Rohrmühle Download PDFInfo
- Publication number
- EP0680788B1 EP0680788B1 EP95106436A EP95106436A EP0680788B1 EP 0680788 B1 EP0680788 B1 EP 0680788B1 EP 95106436 A EP95106436 A EP 95106436A EP 95106436 A EP95106436 A EP 95106436A EP 0680788 B1 EP0680788 B1 EP 0680788B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mill
- housing
- tube
- opening
- openings
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/186—Adding fluid, other than for crushing by fluid energy
- B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
- B02C17/188—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone characterised by point of gas entry or exit or by gas flow path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
Definitions
- the invention relates to a tube mill, in particular an airflow mill, for comminution brittle ground material with a mill tube rotatable about an axis and with a drive arranged at the discharge end of the mill tube.
- Tube mills are mostly used in the cement and ore industries long ball mills referred to in which the ratio of length to diameter the grinder is significantly larger than 1.
- the tube mill is equipped with an additional Axial air flow applied, one speaks of an air flow mill. This air flow can be used, for example, for mill drying; it brings about an internal classification in the grinding room and can, if appropriate Size of the regrind directly to a downstream separator, for example a sifter.
- the ground material is usually introduced (and in airflow mills the Entry of air) at one end of the mill tube through a neck bearing. Of the Discharge of the ground material (and the air) takes place on the other in known mills End of the mill tube also through a neck bearing.
- a tube mill is described for example in DE 20 23 933. But they are also tube mills known where the discharge in the middle or at the end of the mill tube through openings arranged in the mill tube jacket (see e.g. EP-A-0 184 326)
- the gear ring gear (pinion drive on a ring gear that is attached to the outer circumference of the mill tube) and the Central drive, which attacks the neck bearing journal in known mills.
- the tube mill described in DE 20 23 933 has such a central drive.
- the regrind is also discharged in the known tube mills a central drive through openings in the lateral surface of the neck bearing pin (Discharge coupling piece).
- the ground material and the mill air are discharged through openings that are arranged peripherally in the end wall of the mill tube are.
- the number of openings and their size are chosen so that the regrind and the mill air - even with large amounts of air - almost unhindered Mühlenrohr can leave without the mechanical stability of the end wall is significantly reduced with regard to the attachment of the central drive.
- the discharge openings open into an annular channel on the outside of the front wall the tube mill is attached and which rotates with the tube mill and to the gastight - due to appropriately arranged annular gap seals - an annular shape Connected in front of the end wall of a stationary housing.
- the front wall from the outside in it Center freely accessible, so that here the central drive is connected directly to the front wall can be driven and the tube mill is thus driven centrally via the front wall becomes.
- the bottleneck existing in known tube mills, when used of a central drive to discharge through a neck bearing is not necessary.
- the ring channel In the housing is the regrind that comes from the lower discharge openings the ring channel enters the housing, with the mill airflow coming from the top Outlets flows into the housing via the ring channel, mixed and then pneumatically guided to an upper housing opening to which, for example a pipeline to a separator, for example to a Classifier, is connected.
- Fig. 1 shows the outlet end of a tube mill with a around an axis of rotation (27) rotatably mounted mill tube (11), an outlet wall (24) and the End wall (10) closing the grinding tube.
- the known outlet wall (24) serves to hold back the grinding media (26) in the mill, for example Grinding balls.
- it is sieve-shaped with sieve openings, the size of which corresponds to the nominal grain size of the ground material (17), so that the shredded regrind (17) can pass through the sieve openings while the grinding media (26) are retained.
- the outlet wall (24) and the end wall (10) thus enriches the regrind (17) that now through the peripherally arranged in the end wall, when the tube mill rotates discharge openings (14) located below is discharged.
- the regrind (17) passes through these discharge openings (14) into an outside the end wall (10) arranged and firmly connected to the end wall ring channel (15) and through this into the ring channel (15) via annular gap seals (29) gas-tight housing (19), which is stationary in front of the ring End wall (10) is located.
- the mill air flow (16) flowing through the tube mill leaves it through the during the rotation of the tube mill, the discharge openings (13) and likewise passes through the ring channel (15) into the housing (19) in which it, like 2 shows, in an arc around the central drive (12) to an opening (18) is guided, from which, for example, a pipeline to a separating device (not shown in the drawing).
- a gravity Backflow flap (28) that builds up the ground material (17) and in particular the Mill air flow (16) forces the path indicated by the arrows 30 to take that ground material (17) is fed into the mill air flow (16).
- the speed of the mill air flow (16) is large enough to pneumatically grind the grinding stock (17) to promote the opening (18).
- an opening (20) secondary air (21) can also be introduced into the housing (19). Even if the tube mill is not an airflow mill, can by this secondary air (21) pneumatic transport are made possible.
- the housing (19) has at its deepest point an opening (22) through which coarse regrind (23) which is too heavy for pneumatic transport and as a result falls down through the blind (25), over a lock (in the Drawing not shown) are carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Control Of Metal Rolling (AREA)
- Lasers (AREA)
- Processing Of Terminals (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Description
- Fig. 1:
- die teilweise geschnittene Seitenansicht des Auslaufendes einer Rohrmühle;
- Fig. 2:
- die Vorderansicht einer Rohrmühle gemäß Fig. 1.
Claims (3)
- Rohrmühle, insbesondere Luftstrommühle, zur Zerkleinerung spröden Mahlgutes mit einem um eine Achse (27) drehbar gelagerten Mühlenrohr (11) und mit einem am Austragsende des Mühlenrohres (11) angeordneten Antrieb (12), gekennzeichnet durcha) peripher an der Stirnwand (10) des Mühlenrohres (11) angeordnete Austragsöffnungen (13, 14), die in einen außen an der Stirnwand befestigten Ringkanal (15) münden;b) ein ringförmig ausgebildetes, ortsfest vor der Stirnwand (10) des Mühlenrohres (11) angeordnetes und gasdicht am Ringkanal (15) anliegendes Gehäuse (19), in das der vorwiegend aus den oberen Austragsöffnungen (13) eintretende Mühlenluftstrom (16) und das vorwiegend aus den unteren Austragsöffnungen (14) eintretende Mahlgut (17) zusammengeführt und das Mahlgut (17) mit Hilfe des Mühlenluftstroms (16) pneumatisch zu einer oberen Austrittsöffnung (18) geführt wird;c) eine zentrale Antriebseinheit (12), die mittig im Gehäuse (19) unmittelbar an der Stirnwand (10) des Mühlenrohres (11) angreift.
- Rohrmühle nach Anspruch 1, dadurch gekennzeichnet, daß seitlich im Gehäuse (19) eine Öffnung (20) angeordnet ist, durch die Sekundärluft (21) eingespeist werden kann zur Unterstützung des pneumatischen Transports des Mahlgutes (17) innerhalb des Gehäuses (19). 3. Rohrmühle nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß im unteren Bereich des Gehäuses (19) eine Öffnung (22) angeordnet ist, durch die abgeschiedenes für den pneumatischen Transport zu grobes Mahlgut (23) abgezogen werden kann.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4416267 | 1994-05-07 | ||
DE4416267A DE4416267A1 (de) | 1994-05-07 | 1994-05-07 | Rohrmühle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0680788A1 EP0680788A1 (de) | 1995-11-08 |
EP0680788B1 true EP0680788B1 (de) | 1998-05-27 |
Family
ID=6517634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95106436A Expired - Lifetime EP0680788B1 (de) | 1994-05-07 | 1995-04-28 | Rohrmühle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0680788B1 (de) |
AT (1) | ATE166597T1 (de) |
DE (2) | DE4416267A1 (de) |
DK (1) | DK0680788T3 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004023438B4 (de) * | 2004-05-12 | 2017-08-10 | Thyssenkrupp Industrial Solutions Ag | Rohrmühle |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE571097C (de) * | 1933-02-25 | Polysius Akt Ges G | Austragvorrichtung fuer Rohr- oder Verbundmuehlen | |
DE113844C (de) * | ||||
FR2137221B1 (de) * | 1971-05-17 | 1973-05-11 | Fives Lille Cail | |
IT1153927B (it) * | 1982-12-28 | 1987-01-21 | Italcementi Spa | Molino tubolare per la macinazione di materie prime naturali e sintetiche, in particolare per l'industria del cemento |
GB8430514D0 (en) * | 1984-12-04 | 1985-01-09 | Smidth & Co As F L | Tube mill |
SU1291208A1 (ru) * | 1985-08-12 | 1987-02-23 | Производственное объединение "Уралмаш" | Барабанна мельница |
SU1502092A1 (ru) * | 1987-06-15 | 1989-08-23 | Тамбовский институт химического машиностроения | Способ сухого измельчени материала и устройство дл его осуществлени |
-
1994
- 1994-05-07 DE DE4416267A patent/DE4416267A1/de not_active Withdrawn
-
1995
- 1995-04-28 DE DE59502308T patent/DE59502308D1/de not_active Expired - Fee Related
- 1995-04-28 EP EP95106436A patent/EP0680788B1/de not_active Expired - Lifetime
- 1995-04-28 AT AT95106436T patent/ATE166597T1/de active
- 1995-04-28 DK DK95106436T patent/DK0680788T3/da active
Also Published As
Publication number | Publication date |
---|---|
DE59502308D1 (de) | 1998-07-02 |
DK0680788T3 (da) | 1999-03-22 |
ATE166597T1 (de) | 1998-06-15 |
EP0680788A1 (de) | 1995-11-08 |
DE4416267A1 (de) | 1995-11-09 |
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