EP0510418A1 - Agitating machine for hot pulpy fluids - Google Patents
Agitating machine for hot pulpy fluids Download PDFInfo
- Publication number
- EP0510418A1 EP0510418A1 EP92105900A EP92105900A EP0510418A1 EP 0510418 A1 EP0510418 A1 EP 0510418A1 EP 92105900 A EP92105900 A EP 92105900A EP 92105900 A EP92105900 A EP 92105900A EP 0510418 A1 EP0510418 A1 EP 0510418A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paddle wheel
- hot
- liquid
- scooping
- angle greater
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/005—Removing slag from a molten metal surface
- B22D43/007—Removing slag from a molten metal surface by using scrapers
Definitions
- the invention relates to a paddle wheel for hot, mushy liquids such as e.g. Paddle wheel for aluminum dross or slag or sludge in pelletizing systems.
- hot melt such as e.g. Take out slag and further process this hot pulpy liquid.
- scoop wheels are subjected to very high thermal stress and mostly work under red-hot conditions in which the strength is reduced, so that relatively small forces are sufficient to achieve deformations of the paddle wheel or scoop wheel.
- overloads are caused, inter alia, by caking, which leads to periodic stripping of the protruding caking and thus to impact forces which increase the loads and thereby impair the functionality of the impeller.
- the phenomena with solidifying liquids are even worse, e.g. Aluminum dross or slags, which usually have an inhomogeneous melting point or melting range, so that solidified liquids float island-like in the hot liquid, or a more or less firm skin forms on the liquid at all.
- the invention has set itself the task of keeping such formation as low as possible by tearing, so that caking occurs less easily and the movement resistance is thereby reduced.
- the invention is characterized in that the paddle wheel axially offset and overlapping parts - has at least one scooping part and a stirring part, which are arranged on radial arms and are alternately guided along a circular path and immersed in the hot liquid to be processed.
- the scooping part and the stirring part are arranged separated from one another by approximately 180 ° with effective areas overlapping in the liquid bath, and preferably cutting on the scooping part and / or on the stirring part are cuts with a breast angle greater than 90 ° and a clearance angle greater than 0 ° with a pulling cut away from the end faces provided.
- FIGS. 1 to 5 a paddle wheel in cross-section in FIG. 1 and an associated elevation in FIG. 2. 3 shows the cutting edge formation of the part immersed in the liquid, FIG. 4 shows a view from direction A in FIG. 1 and FIG. 5 shows a view from direction B in FIG. 1.
- Fig. 1 the paddle wheel is visible in a cross-section, and you can see the scoop part 1 just immersed in the liquid 3 and the stirring part 2 arranged opposite the axis of rotation 4, which is outside the liquid and after a half turn around the axis of rotation 4 according to arrow 7 in the liquid will dip.
- the breast angle 5 and also the clearance angle 6 of the plunging edges are shown in FIG. 3, the breast angle 5 being greater than 90 ° and the clearance angle 6 being greater than 0 °.
- the cutting edges are intended to produce a pulling cut and the solidifying masses are transported away from the contact surfaces of the cutting edges. This can be seen particularly in FIGS. 4 and 5, in each of which a view from direction A or B is shown with reference to FIG. 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Paper (AREA)
Abstract
Description
Die Erfindung betrifft ein Schaufelrad für heiße, breiartige Flüssigkeiten wie z.B. Schaufelrad für Aluminiumkrätze oder Schlacke bzw. Schlamm bei Granulierungsanlagen.The invention relates to a paddle wheel for hot, mushy liquids such as e.g. Paddle wheel for aluminum dross or slag or sludge in pelletizing systems.
Es ist bekannt (DE-A1 1,920.605), aus einem Becken heiße Schmelze wie z.B. Schlacke zu entnehmen und diese heiße breiige Flüssigkeit weiter zu verarbeiten. Derartige Schöpfräder werden thermisch sehr hoch beansprucht und arbeiten meistens unter rotglühenden Bedingungen, bei welchen die Festigkeit reduziert ist, so daß relativ kleine Kräfte genügen, um Verformungen des Schaufelrades bzw. Schöpfrades zu erreichen. Derartige Überlastungen werden unter anderem durch Anbackungen verursacht, wodurch es zu periodischen Abstreifungen der überstehenden Anbackungen und damit zu Stoßkräften kommt, die die Belastungen erhöhen und dadurch die Funktionsfähigkeit des Schaufelrades beeinträchtigen. Noch ärger sind die Erscheinungen bei erstarrenden Flüssigkeiten wie z.B. Aluminiumkrätze oder Schlacken, die meistens einen inhomogenen Schmelzpunkt oder Schmelzbereich aufweisen, so daß erstarrte Flüssigkeiten inselartig in der heißen Flüssigkeit schwimmen, oder sich überhaupt auf der Flüssigkeit eine mehr oder minder feste Haut bildet.It is known (DE-A1 1,920,605) that hot melt such as e.g. Take out slag and further process this hot pulpy liquid. Such scoop wheels are subjected to very high thermal stress and mostly work under red-hot conditions in which the strength is reduced, so that relatively small forces are sufficient to achieve deformations of the paddle wheel or scoop wheel. Such overloads are caused, inter alia, by caking, which leads to periodic stripping of the protruding caking and thus to impact forces which increase the loads and thereby impair the functionality of the impeller. The phenomena with solidifying liquids are even worse, e.g. Aluminum dross or slags, which usually have an inhomogeneous melting point or melting range, so that solidified liquids float island-like in the hot liquid, or a more or less firm skin forms on the liquid at all.
Die Erfindung hat es sich zur Aufgabe gestellt, derartige Bildungen durch Zerreißung möglichst gering zu halten, so daß Anbackungen weniger leicht entstehen und der Bewegungswiderstand dadurch zu verringert wird Die Erfindung ist dadurch gekennzeichnet, daß das Schaufelrad axial versetzte und überlappende Teile - mindestens einen Schöpfteil und einen Rührteil - aufweist, die auf Radialarmen angeordnet und längs einer Kreisbahn abwechselnd in die zu verarbeitende heiße Flüssigkeit eintauchend geführt sind. Insbesondere sind der Schöpfteil und der Rührteil um etwa 180° voneinander getrennt mit im Flüssgkeitsbad überlappenden Wirkungsflächen angeordnet und vorzugsweise sind am Schöpfteil und/oder am Rührteil Schneiden mit einem Brustwinkel größer als 90° und einem Freiwinkel größer als 0° bei einem ziehenden Schnitt weg von den Stirnflächen vorgesehen.The invention has set itself the task of keeping such formation as low as possible by tearing, so that caking occurs less easily and the movement resistance is thereby reduced. The invention is characterized in that the paddle wheel axially offset and overlapping parts - has at least one scooping part and a stirring part, which are arranged on radial arms and are alternately guided along a circular path and immersed in the hot liquid to be processed. In particular, the scooping part and the stirring part are arranged separated from one another by approximately 180 ° with effective areas overlapping in the liquid bath, and preferably cutting on the scooping part and / or on the stirring part are cuts with a breast angle greater than 90 ° and a clearance angle greater than 0 ° with a pulling cut away from the end faces provided.
Die Erfindung ist in den Fig. 1 bis 5 beispielsweise und schematisch dargestellt, wobei in Fig. 1 ein Schaufelrad im Kreuzriß und in Fig. 2 ein zugehöriger Aufriß dargestellt ist. Fig. 3 zeigt die Schneidenausbildung des jeweils in die Flüssigkeit eintauchenden Teiles, Fig. 4 eine Ansicht aus Richtung A in Fig. 1 und Fig. 5 eine Ansicht aus Richtung B in Fig. 1.The invention is shown, for example and schematically, in FIGS. 1 to 5, a paddle wheel in cross-section in FIG. 1 and an associated elevation in FIG. 2. 3 shows the cutting edge formation of the part immersed in the liquid, FIG. 4 shows a view from direction A in FIG. 1 and FIG. 5 shows a view from direction B in FIG. 1.
In Fig. 1 ist das Schaufelrad im Kreuzriß sichtbar, und man erkennt den gerade in die Flüssigkeit 3 eintauchenden Schöpfteil 1 und den gegenüber der Drehachse 4 angeordneten Rührteil 2, der außerhalb der Flüssigkeit liegt und nach einer Halbdrehung um die Drehachse 4 gemäß Pfeil 7 in die Flüssigkeit eintauchen wird.In Fig. 1 the paddle wheel is visible in a cross-section, and you can see the
Aus Fig. 2, dem zugehörigen Aufriß zu Fig. 1, entnimmt man, daß der Rührteil 2 den Schöpfteil 1 in Richtung der Drehachse 4 überlappt (Bezugszeichen 8), wodurch die Hautbildungen im Bereich des Schöpfteiles zerrissen werden und der Schöpfteil 1 mit großer Wahrscheinlichkeit beim Eintauchen nicht durch eine starke Haut einer überbeanspruchung unterworfen wird. Da in den meisten Fällen die Schlacken- oder Krätzenflüssigkeit in der Nähe des Erstarrungspunktes oder im Erstarrungsbereich liegt, sind die eintauchenden Teile infolge des Temperaturunterschiedes zwischen Bad und dem eintauchenden Teil anbackungsanfällig, so daß durch Ausbildung der eintauchenden Kanten als Schneiden zum ständigen Zerreißen der gebildeten Haut eine Verringerung der festigkeitsmäßigen Beanspruchung möglich ist. So ist in Fig. 3 der Brustwinkel 5 und auch der Freiwinkel 6 der eintauchenden Kanten eingezeichnet, wobei der Brustwinkel 5 größer als 90° und der Freiwinkel 6 größer als 0° ausgebildet ist. Dazu sollen die Schneiden einen ziehenden Schnitt bewirken und die erstarrenden Massen von den Berührungsflächen der Schneiden weg befördert werden. Dies erkennt man besonders in den Fig. 4 und 5, bei welchen jeweils eine Ansicht aus Richtung A bzw. B im Bezug auf Fig. 1 dargestellt ist.From Fig. 2, the corresponding elevation to Fig. 1, it can be seen that the
In den einzelnen Figuren ist ferner die Drehrichtung durch einen Pfeil 7 und die Überlappung des Schöpfteiles 1 mit dem Rührteil 2 durch das Bezugszeichen 8 angedeutet.In the individual figures, the direction of rotation is also indicated by an
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87091A AT396660B (en) | 1991-04-25 | 1991-04-25 | PADDLE WHEEL FOR HOT, MASHED LIQUIDS |
AT870/91 | 1991-04-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0510418A1 true EP0510418A1 (en) | 1992-10-28 |
EP0510418B1 EP0510418B1 (en) | 1995-10-25 |
Family
ID=3501709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920105900 Expired - Lifetime EP0510418B1 (en) | 1991-04-25 | 1992-04-06 | Agitating machine for hot pulpy fluids |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0510418B1 (en) |
AT (1) | AT396660B (en) |
DE (1) | DE59204090D1 (en) |
ES (1) | ES2079716T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104923774B (en) * | 2015-07-07 | 2017-03-22 | 云南云铝润鑫铝业有限公司 | Automatic slag removal machine for ingot casting |
CN110834087A (en) * | 2019-11-06 | 2020-02-25 | 李甫鸣 | Aluminum ash removing device based on magnetic induction and Bernoulli principle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1265333A (en) * | 1914-07-01 | 1918-05-07 | Henry Howard | Liquid-feeding apparatus. |
DE1458093B2 (en) * | 1964-02-28 | 1970-08-13 | Lauterjung, Gustav, 565O Solingen-Wald | Casting device, especially for aluminum chill casting |
US3690517A (en) * | 1969-12-15 | 1972-09-12 | Respond Inc | Automatic ladler |
US3917235A (en) * | 1974-04-26 | 1975-11-04 | Combustion Eng | Mixing apparatus |
DE2539378B1 (en) * | 1975-09-04 | 1976-05-26 | Hoesch Werke Ag | Power-operated scraper blades - for removing slag from the surface of molten metal, esp. iron |
DE3114883A1 (en) * | 1981-04-13 | 1982-11-11 | Beck, Hermann, 7067 Buoch | Stirrer for bituminous paste as road construction material or road repair material |
DE3622056A1 (en) * | 1985-07-08 | 1987-01-15 | Kamyr Ab | FOREIGN MATERIAL SEPARATOR |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3556354A (en) * | 1968-04-30 | 1971-01-19 | Respond Inc | Ladle trap chamber and tilting dispenser |
-
1991
- 1991-04-25 AT AT87091A patent/AT396660B/en not_active IP Right Cessation
-
1992
- 1992-04-06 EP EP19920105900 patent/EP0510418B1/en not_active Expired - Lifetime
- 1992-04-06 DE DE59204090T patent/DE59204090D1/en not_active Expired - Fee Related
- 1992-04-06 ES ES92105900T patent/ES2079716T3/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1265333A (en) * | 1914-07-01 | 1918-05-07 | Henry Howard | Liquid-feeding apparatus. |
DE1458093B2 (en) * | 1964-02-28 | 1970-08-13 | Lauterjung, Gustav, 565O Solingen-Wald | Casting device, especially for aluminum chill casting |
US3690517A (en) * | 1969-12-15 | 1972-09-12 | Respond Inc | Automatic ladler |
US3917235A (en) * | 1974-04-26 | 1975-11-04 | Combustion Eng | Mixing apparatus |
DE2539378B1 (en) * | 1975-09-04 | 1976-05-26 | Hoesch Werke Ag | Power-operated scraper blades - for removing slag from the surface of molten metal, esp. iron |
DE3114883A1 (en) * | 1981-04-13 | 1982-11-11 | Beck, Hermann, 7067 Buoch | Stirrer for bituminous paste as road construction material or road repair material |
DE3622056A1 (en) * | 1985-07-08 | 1987-01-15 | Kamyr Ab | FOREIGN MATERIAL SEPARATOR |
Also Published As
Publication number | Publication date |
---|---|
ATA87091A (en) | 1993-03-15 |
AT396660B (en) | 1993-11-25 |
EP0510418B1 (en) | 1995-10-25 |
ES2079716T3 (en) | 1996-01-16 |
DE59204090D1 (en) | 1995-11-30 |
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