EP0381084B2 - Rohrmühlen-Trennwand - Google Patents

Rohrmühlen-Trennwand Download PDF

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Publication number
EP0381084B2
EP0381084B2 EP90101618A EP90101618A EP0381084B2 EP 0381084 B2 EP0381084 B2 EP 0381084B2 EP 90101618 A EP90101618 A EP 90101618A EP 90101618 A EP90101618 A EP 90101618A EP 0381084 B2 EP0381084 B2 EP 0381084B2
Authority
EP
European Patent Office
Prior art keywords
tube mill
rear wall
partition according
anyone
air passage
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
Application number
EP90101618A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0381084B1 (de
EP0381084A2 (de
EP0381084A3 (en
Inventor
Ralph Michelsen
Udo Schulze-Brockhausen
Herbert Dr. Weit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Original Assignee
Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Christian Pfeiffer Maschinenfabrik GmbH and Co KG filed Critical Christian Pfeiffer Maschinenfabrik GmbH and Co KG
Publication of EP0381084A2 publication Critical patent/EP0381084A2/de
Publication of EP0381084A3 publication Critical patent/EP0381084A3/de
Publication of EP0381084B1 publication Critical patent/EP0381084B1/de
Application granted granted Critical
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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
    • B02C17/04—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 with unperforated container
    • B02C17/06—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 with unperforated container with several compartments

Definitions

  • the invention relates to a tube mill partition according to the preamble of claim 1.
  • Such a tube mill partition is known from GB-A 13 80 313.
  • a frustoconical middle part connects a front slit wall with a downstream rear wall and forms a conically reducing air passage opening.
  • a circular cylindrical or polygonal holder is fastened to the slot and rear wall within the partition, in whose openings lifting blades extending radially in the direction of the tube mill jacket are fastened. Milling flow control of the material to be ground raised by the blades and guided via the truncated cone into the subsequent chamber is carried out via the useful volume of the blades or with the aid of an adjusting ring.
  • This collar which has complementary openings to the holder and abuts the inner circumference of the holder, is rotatably adjustable, so that depending on the material flow opening, different amounts of regrind are passed from the blades to the frustoconical middle part and from there to the subsequent chamber.
  • the constricting air passage opening leads to congestion effects and to a drop in pressure in the passed grinding air. Associated with this is a reduced transport of regrind, which increases efficiency the entire tube mill is adversely affected.
  • the partition wall described in BE-A 851 835 also has a structurally complex material flow control, the middle part of which is designed to be polygonal for fastening the blades.
  • An annular flange on the blades enables them to be adjusted and the usable volume changed, while the regrind is discharged via the cylindrical blade ends which protrude into the air passage opening and have deflection members.
  • the air passage opening consequently has no free inner radius, so that the air flow is impeded by congestion effects and eddy formation.
  • the invention has for its object to design a generic tube mill partition, in particular as a transfer or discharge wall, so that with a relatively simple structure, an improved air flow with favorable material flow control and with improved ease of maintenance is created.
  • the slots that may be present in the area of the air passage opening in the rear wall additively contribute to the air passage. Primarily, however, the minimum amount of material flow can be set here.
  • the basic principle is expanded to provide a stationary, tubular ring element at least in the rear part of the partition.
  • This ring element can have openings in its peripheral wall, for example, or can have such openings additionally or alternatively only in the edge region to the rear wall.
  • the collar which can be axially displaceable and / or rotatable on the stationary ring element on the outside or inside as a whole or in segments, can therefore be adjusted with matching openings so that the openings in the collar and the stationary ring element coincide. With the latter orientation of the openings, a maximum material flow would be given.
  • By appropriate adjustment of the adjusting ring relative to the ring element there is therefore the possibility of very precise regulation of the regrind flow into the next chamber.
  • This concept of the coaxial, tubular air passage opening is expanded with a view to optimizing the free air passage area in such a way that a degree of filling in the chamber of the tube mill upstream of the partition wall can be assumed to be in the range from 20 to 36% and in particular around 25%.
  • a degree of filling of about 25% material-ball filling can now be used as a starting point due to the comminution of the ground material in front of the tube mill, which is usually carried out beforehand.
  • the grille previously provided in the air passage opening is designed with a lattice structure, for example as a wire mesh, which has a free air passage area of approximately 70 to 90% and in particular approximately 75%.
  • a lattice structure for example as a wire mesh, which has a free air passage area of approximately 70 to 90% and in particular approximately 75%.
  • This can suitably be implemented by means of a wire mesh or a flat steel construction is used, for example made of special steel or spring steel.
  • the free cross-section is expanded from previously around 50% to 70% and more.
  • the grating is expediently arranged inwards from the end face of the partition and in particular approximately in the axial central region. Ball deflectors are then suitably arranged on both sides of the grille for returning balls that have entered the air passage space.
  • the grille is designed especially for larger diameters, e.g. of 1.90 m, with a circular inner part and an outer lattice ring.
  • larger diameters e.g. of 1.90 m
  • a corresponding ring can be attached to the middle part in the area of the air passage opening, which reduces the diameter of the air passage opening on the diaphragm wall side and on the rear wall side.
  • the tube mill can therefore also be quickly upgraded for higher fill levels in the case of the partition wall, which has been designed especially for minimal fill levels.
  • the basic concept of the invention therefore provides for a largely tubular, coaxial opening in the central region of the partition wall from the front diaphragm wall up to and including the rear wall.
  • the adjusting ring for regulating the material flow can primarily be permanently set to a specific material flow rate. However, the axial or rotary adjustment of the adjusting ring can also be regulated at any time.
  • the invention therefore creates a tube mill partition wall in which an optimal air passage is achieved in a structurally simple manner and at the same time a very precisely adjustable material flow.
  • a tube mill partition 1 is shown schematically in radial section.
  • the circular partition rests with its U-shaped fastening ring 2 against the inner wall of the tube mill.
  • a slotted wall 3 is provided on the upstream, left-hand side according to FIG. 1, which has individual slotted plates 4 in segments.
  • the slotted plates 4 are connected to the fastening ring 2 via sheet metal crosses 24.
  • the partition 1 is closed off by a rear wall 5 with plates 5a attached to it.
  • the rear wall 5 in the example has a ring equipped with slots 21, the free inside diameter of which roughly corresponds to the free inside diameter of the central part 6 or, according to FIG. 1, the ring 7.
  • the essentially circular-cylindrical and tubular middle part 6 forms the central air passage opening, in the middle region of which a grille 9 is installed.
  • This grid 9, which is preferably made of special steel, has a free passage area of approximately 75% to 90%.
  • this grille 9 has a circular inner part 10, which is easily removable and removable, while an outer grille ring 22 is connected to the central part in a conventional manner.
  • Ball deflectors 11 are indicated schematically on both sides of the grille 9, which cause appropriate grinding balls to be ejected into the respective chamber.
  • the middle part 6 is equipped to the right of the grille 9 in the region of the rear wall 5 or the rear wall ring 8 with a segmented adjusting ring 15 which has approximately rectangular, segment-like openings 16 in the downstream direction in its edge region.
  • the adjusting ring 15 interacts with a stationary ring element 14 which is provided in a form-fitting manner thereon and which likewise has largely identical segment openings 17 in the edge region to the rear wall 5.
  • the adjusting ring 15 therefore completely or partially covers the underlying openings 17 of the stationary ring element 14, depending on the angular displacement, in the event of a corresponding shift in the circumferential direction.
  • the shredded material passes from the left-hand chamber through the corresponding slots in the diaphragm wall 3 into the lower intermediate region between the diaphragm and rear wall, it is lifted up there by means of appropriate lifting blades 12 and can be adjusted according to the setting of the adjusting ring 15 via the corresponding openings 16 flow through the free inner diameter of the rear wall ring 8 into the chamber provided on the right. A minimal flow of material is possible through the slots 21 with the adjusting ring 15 completely closed.
  • FIG. 2 shows three different views of the partition 1 according to FIG. 1.
  • the segment-like division of the slotted wall 3 into individual slotted plates 4, the radial edge area of which has an arcuate shape.
  • a closed, divided ring 7 adjoins this slotted plate 4 radially inward, the free inner diameter of which is adjusted to the degree of filling of the upstream chamber of the tube mill.
  • This ring 7 is usually segmented and can therefore be replaced relatively easily.
  • the grille 9 is fastened with its circular inner part 10 and the outer grille ring 22 to the middle part 6.
  • These lifting blades 12 are, on the one hand, curved in the radial direction as shown in FIG. 3 and also have an inclined position in the axial direction in order to be able to optimally transfer the ground material entering the partition into the next chamber.
  • the partition 1 constructed in this way enables a considerably improved passage of air through the partition, so that energy losses are minimized. Due to the segmentation of all essential parts, maintenance work is relatively easy to perform. In the sense of a modular system, the partition wall can also be easily adapted to different filling levels of the tube mill with optimal ventilation. The provision of propeller-shaped ball deflectors prevents impairments, in particular of the grille in the air passage area.
  • the adjusting ring ultimately provides a simple and also subsequent installation of such a middle part with easy adjustment and a large control range for the material flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP90101618A 1989-02-03 1990-01-26 Rohrmühlen-Trennwand Expired - Lifetime EP0381084B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3903256A DE3903256A1 (de) 1989-02-03 1989-02-03 Rohrmuehlen-trennwand
DE3903256 1989-02-03
DE8901232U DE8901232U1 (de) 1989-02-03 1989-02-03 Rohrmühlen-Trennwand

Publications (4)

Publication Number Publication Date
EP0381084A2 EP0381084A2 (de) 1990-08-08
EP0381084A3 EP0381084A3 (en) 1990-09-26
EP0381084B1 EP0381084B1 (de) 1992-12-09
EP0381084B2 true EP0381084B2 (de) 1995-11-29

Family

ID=39363847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101618A Expired - Lifetime EP0381084B2 (de) 1989-02-03 1990-01-26 Rohrmühlen-Trennwand

Country Status (8)

Country Link
US (1) US5056722A (ja)
EP (1) EP0381084B2 (ja)
JP (1) JPH0775676B2 (ja)
CA (1) CA2009236C (ja)
DE (2) DE8901232U1 (ja)
DK (1) DK0381084T3 (ja)
ES (1) ES2036849T3 (ja)
IT (1) IT1229454B (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043014C (zh) * 1990-11-13 1999-04-21 国家建筑材料工业局合肥水泥研究设计院 管磨机
EP0665769B1 (en) * 1992-10-28 1997-01-29 Slegten, Societe Anonyme Method and device for tubular rotary ball mill or mill with similar grinding instruments
US20070102550A1 (en) * 2005-11-07 2007-05-10 Lin Ping H Plastic grain cutting and transporting mechanism
RU209381U1 (ru) * 2021-11-22 2022-03-15 Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" Разгрузочная решетка барабанной мельницы

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595509A (en) * 1946-11-08 1952-05-06 Allan K Brown Rotary drier and disintegrator
DE1507604A1 (de) * 1966-12-22 1969-07-17 Miag Muehlenbau & Ind Gmbh UEberfuehrungswand einer Rohrmuehle
CA909185A (en) * 1969-09-04 1972-09-05 Dominion Engineering Works Limited Autogenous mill system
DE2207484C3 (de) * 1971-02-18 1988-07-07 Slegten, Pierre, Brüssel/Bruxelles Trennwand in einer Kugelrohrmühle
DE2447262C2 (de) * 1974-10-03 1985-05-15 F.L. Smidth & Co. A/S, Kopenhagen/Koebenhavn Rohrmühle
US3949949A (en) * 1975-04-25 1976-04-13 Phillips Petroleum Company Web tension control
US4032075A (en) * 1976-08-16 1977-06-28 Tyer Sr Clarence C Multi-chambered scrubber having polygonal cross-section
BE851835R (fr) * 1977-02-25 1977-06-16 Slegten Sa Procede de reglage de la quantite de matiere dans un compartiment de broyage d'un tube broyeur a boulets
SU1115799A1 (ru) * 1983-07-08 1984-09-30 Ивановский Ордена "Знак Почета" Энергетический Институт Им.В.И.Ленина Барабанна мельница
DE3337877A1 (de) * 1983-10-18 1985-04-25 Krupp Polysius Ag, 4720 Beckum Rohrmuehle
GB8430514D0 (en) * 1984-12-04 1985-01-09 Smidth & Co As F L Tube mill
DD253948A1 (de) * 1986-11-28 1988-02-10 Dessau Zementanlagenbau Veb Reguliereinrichtung fuer zwischen- und austragswaende in rohrmuehlen
JPH0646501Y2 (ja) * 1988-05-21 1994-11-30 株式会社栗本鐵工所 チューブミルの流量調整機能を具えた中仕切中心金物

Also Published As

Publication number Publication date
DK0381084T3 (da) 1993-04-13
ES2036849T3 (es) 1993-06-01
CA2009236A1 (en) 1990-08-03
EP0381084B1 (de) 1992-12-09
EP0381084A2 (de) 1990-08-08
IT1229454B (it) 1991-08-08
IT8920797A0 (it) 1989-06-06
DE8901232U1 (de) 1989-03-23
CA2009236C (en) 1992-04-14
JPH0356151A (ja) 1991-03-11
US5056722A (en) 1991-10-15
JPH0775676B2 (ja) 1995-08-16
DE3903256C2 (ja) 1991-03-28
EP0381084A3 (en) 1990-09-26
DE3903256A1 (de) 1990-08-09

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