EP4311994A1 - Metallurgical vessel with a tapping device for the controlled tapping of liquid metal - Google Patents
Metallurgical vessel with a tapping device for the controlled tapping of liquid metal Download PDFInfo
- Publication number
- EP4311994A1 EP4311994A1 EP22186913.4A EP22186913A EP4311994A1 EP 4311994 A1 EP4311994 A1 EP 4311994A1 EP 22186913 A EP22186913 A EP 22186913A EP 4311994 A1 EP4311994 A1 EP 4311994A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tapping
- vessel
- channel
- vessel wall
- liquid metal
- 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
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 56
- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 24
- 230000005484 gravity Effects 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/19—Arrangements of devices for discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/20—Arrangements of heating devices
- F27B3/205—Burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
- F27D3/1518—Tapholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
Definitions
- the invention is in the field of metallurgical plants, specifically in the field of metallurgical vessels of metals.
- the metallurgical vessel has a tapping device for the controlled tapping of liquid metal, which is located in a lower part of the vessel.
- the lower part of the vessel consists of a fireproof lining with a vessel base and a closed vessel wall.
- a portion of the vessel wall, from an inside of the vessel wall to an outside of the vessel wall, has a drainage channel.
- the tapping device is designed in such a way that the outflow channel on the outside of the vessel wall opens into a tapping channel of the tapping device.
- the tapping channel initially extends upwards - at an absolute angle of 0° to 20° to the force of gravity, preferably at an absolute angle of 0° to 5° to the force of gravity, opposite to the direction of the force of gravity - to an overflow channel - which extends essentially at an angle of 90 ° to the force of gravity - and the overflow channel opens into a tap hole channel which - essentially in the direction of the force of gravity - at an absolute angle of 0 ° to 20 ° to the force of gravity, preferably at an absolute angle from 0° to 5° to the earth's gravity - runs downwards to a tap opening.
- a tapping device disclosed in this document shows a tendency for the melt to solidify in the channel of the tapping device in phases of processes in which standstills occur between the melts.
- the channel begins at the same level as the bottom of the vessel, which means that the channel is always flooded with liquid steel. It can therefore happen that the liquid metal solidifies during breaks in the process. This solidified metal must then be melted again with liquid metal, which is created when a new process phase starts.
- the object of the present invention is to provide a simple design of the tapping device in which the solidification of liquid metal in the tapping channel is prevented.
- a lower edge of the drainage channel is located on the vessel wall, measured on an inside of the vessel wall from a cutting edge of the vessel wall and the vessel bottom, at a height of 50-300mm, with the drainage channel being at least in a partial area of the vessel wall extends through the vessel wall essentially at a 90° angle to the vessel wall.
- the height of the step depends, on the one hand, on the size of the vessel and, on the other hand, on the respective process operation of the metallurgical furnace.
- This stage allows liquid metal to enter the drain channel with a time delay, even in the melting phase, and thus there is a longer phase in which the drain channel is heated, and thus solidification in the drain channel is avoided due to insufficient temperature of the brick lining in the drain channel .
- the outflow channel should be at a 90° angle to the vessel wall at least in a partial area of the vessel wall, preferably over the entire width of the vessel wall, since such a step can be produced particularly easily and inexpensively.
- the height of the stage is preferably set so that a defined sump of liquid metal is either below or above the stage.
- the focus can be either to delay the inflow of the liquid metal sump into the drainage channel or to completely prevent the slag from flowing in by completely covering the drainage channel with liquid metal.
- the height of the lower edge is determined depending on the percentage of a sump of liquid metal - which remains in the metallurgical melting vessel after tapping - of a tapping weight of the metallurgical vessel, which can be in the range of 15%-70%.
- the height of the lower edge can be chosen so that in the critical process phases, such as process breaks, the liquid metal remaining in the furnace remains completely in the melting vessel and the drainage channel can run completely empty.
- the drain channel In addition to a rectangular cross-section, it can also have a vaulted cross-section or a round cross-section. If the lower edge is not a straight line, then the height is always understood to be that which is the shortest distance from the cutting edge of the vessel wall and the vessel bottom.
- the lower edge and/or an upper edge has a chamfer.
- the chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm.
- the bevel or radius allows for better flow into the drainage channel.
- a flow number increases due to the principle of the rounded or chamfered lower edge and/or upper edge and thus increases a flow rate.
- At least one side edge of the drainage channel has a chamfer or a radius.
- the chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm.
- the bevel allows for better flow into the drainage channel. Because the liquid metal flows in more evenly from all sides, the inlet speed of the liquid metal is harmonized across a cross section of the outflow channel. The one-sided wear on the top edge is reduced and the abrasion is distributed more evenly across all side parts. This extends the service life of the drain channel.
- the tapping opening is located above a lower edge on an outer surface of the vessel bottom. Due to the fact that the lower edge of the drainage channel is above the bottom of the vessel, a lower edge of the vessel bottom can be moved upwards in the area of the drainage channel in order to achieve the same thickness of the refractory lining. This allows the tap opening to be moved upwards in order to obtain a shorter length of the tap hole channel to the tap opening. The shorter length reduces the risk of the canal becoming blocked.
- a burner is placed in the middle of the tapping channel, the burner having an output of at least 0.2 MW and a maximum of 1 MW.
- the central arrangement of the burner reduces wear on the refractory lining in the overflow channel and tapping channel.
- An advantageous embodiment provides that a ratio of the hydraulic diameter of the drainage channel to a diameter of the tap opening is at least greater than 0.9.
- Figs 1 - 4 shows a schematic representation of a metallurgical vessel with a tapping device.
- FIG. 1 A metallurgical vessel 1 is shown, the lower part of the vessel having a refractory lining with a vessel bottom 2 and a closed vessel wall 3. There is a bottom tap 9 in the vessel bottom 2. There is a drain channel 4 in the vessel wall 3. A lower edge 5 of the drain channel 4 is at a height H, measured from the intersection of the vessel wall 3 and the vessel bottom 2. The bottom edge 5 extends from the bottom edge 5 Outflow channel essentially at an angle of 90 ° through the vessel wall 3.
- a tapping device 10 is designed such that the outflow channel 4 opens into a tapping channel 11 of the tapping device 1 and the tapping channel 11, when the metallurgical vessel 1 is in a melting position, is initially extends upward - against the direction of gravity Fg - to an overflow channel 12 and then extends downward into a tap hole channel 13 - in the direction of gravity Fg - to a branch opening 14.
- a metallurgical vessel 1 is also shown with an inside 3a and an outside 3b of the vessel wall 3.
- the lower edge has a chamfer 5a and an upper edge 5d has a chamfer with the dimension a.
- a side wall 5b of the drainage channel 5 also has a chamfer 5c.
- the bevels are each attached at the transition from the inner surface 3a of the vessel wall to the drainage channel 4.
- This design ensures that the liquid metal flows in particularly well from all sides.
- the one-sided wear of the upper edge is reduced.
- the abrasion is distributed more evenly on all four sides of the drain channel 5. This extends the service life of the drain channel.
- Fig. 3 is in contrast to Fig. 1 the lower edge of the tap opening 13 above a lower edge of the vessel bottom 2b, the lower edge 2b being located on an outer surface 2a of the vessel base 2.
- the lower edge 2b is the deepest point of the vessel bottom on its outer surface 2a. This design shortens the length of the tapping channel 11 from the overflow channel 12 to the tapping opening 14.
- the tapping device 10 In addition to the refractory lining 10a, the tapping device 10 also consists of a steel structure 10b.
- the vessel wall 3 which also consists of a refractory lining 3c and a steel structure 3d, is shown with the inside 3a and the outside 3b and the drainage channel 4, which extends from the inside 3a to the outside 3b and opens into the tapping channel 11.
- the tap channel 11 then extends upwards to an overflow channel 12, which then opens into the tap hole channel 13, with a diameter d.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Die Erfindung ist auf dem Gebiet von metallurgischen Anlagen, konkret auf dem Gebiet von metallurgischen Gefäßen von Metallen.Die Aufgabe der vorliegenden Erfindung ist es eine einfache Bauart der Abstichvorrichtung zur Verfügung zu stellen, bei welcher das Erstarren von flüssigem Metall im Abtichkanal verhindert wird.Die Aufgabe wir gelöst durch ein Metallurgisches Gefäß (1) mit einer Abstichvorrichtung (10) zum kontrollierten Abstechen von flüssigem Metall, welches sich in einem Gefäßunterteil befindet. Ein Teilbereich einer Gefäßwand (3) weist, von einer Innenseite (3a) der Gefäßwand (3) zu einer Außenseite (3b der Gefäßwand (3), einen Abflusskanal (4) auf, welcher in einen Abstichkanal (11) der Abstichvorrichtung (10) mündet. Eine Unterkante (5) des Abflusskanal (4) an der Innenseite (3a) der Gefäßwand (3), gemessen von einer Schnittkante der Gefäßwand (3) und dem Gefäßboden (2), befindet sich in einer Höhe (H) von 50-300mm. Der Abflusskanal (4) erstreckt sich zumindest in einem Teilbereich der Gefäßwand (3) im Wesentlichen im 90° Winkel zur Gefäßwand (3) hindurch.The invention is in the field of metallurgical plants, specifically in the field of metallurgical vessels for metals. The object of the present invention is to provide a simple design of the tapping device in which the solidification of liquid metal in the tapping channel is prevented. The The task is solved by a metallurgical vessel (1) with a tapping device (10) for the controlled tapping of liquid metal, which is located in a lower part of the vessel. A partial area of a vessel wall (3) has, from an inside (3a) of the vessel wall (3) to an outside (3b of the vessel wall (3), a drainage channel (4) which flows into a tapping channel (11) of the tapping device (10). A lower edge (5) of the drain channel (4) on the inside (3a) of the vessel wall (3), measured from a cutting edge of the vessel wall (3) and the vessel bottom (2), is at a height (H) of 50 -300mm The outflow channel (4) extends through at least a portion of the vessel wall (3) essentially at a 90° angle to the vessel wall (3).
Description
Die Erfindung ist auf dem Gebiet von metallurgischen Anlagen, konkret auf dem Gebiet von metallurgischen Gefäßen von Metallen.The invention is in the field of metallurgical plants, specifically in the field of metallurgical vessels of metals.
Das metallurgische Gefäß weist eine Abstichvorrichtung zum kontrollierten Abstechen von flüssigem Metall auf, welches sich in einem Gefäßunterteil befindet.The metallurgical vessel has a tapping device for the controlled tapping of liquid metal, which is located in a lower part of the vessel.
Das Gefäßunterteil besteht aus einer Feuerfest - Ausmauerung mit einem Gefäßboden und einer geschlossenen Gefäßwand. Ein Teilbereich der Gefäßwand, von einer Innenseite der Gefäßwand zu einer Außenseite der Gefäßwand, weist einen Abflusskanal auf.The lower part of the vessel consists of a fireproof lining with a vessel base and a closed vessel wall. A portion of the vessel wall, from an inside of the vessel wall to an outside of the vessel wall, has a drainage channel.
Die Abstichvorrichtung ist derart ausgestaltet, dass der Abflusskanal an der Außenseite der Gefäßwand in einen Abstichkanal der Abstichvorrichtung mündet. Der Abstichkanal erstreckt sich, wenn das metallurgische Gefäß sich in einer Schmelzposition befindet, anfangs nach oben - in einem Absolutwinkel von 0° bis 20° zur Erdanziehungskraft, bevorzugt in einem Absolutwinkel von 0° bis 5° zur Erdanziehungskraft, entgegen der Richtung der Erdanziehungskraft - zu einem Überlaufkanal, - welcher sich im Wesentlichen im Winkel von 90° zur Erdanziehungskraft erstreckt - und der Überlaufkanal mündet in einen Abstichlochkanal welcher - im Wesentlichen in Richtung der Erdanziehungskraft - in einem Absolutwinkel von 0° bis 20° zur Erdanziehungskraft, bevorzugt in einem Absolutwinkel von 0° bis 5° zur Erdanziehungskraft -nach unten zu einer Abstichöffnung verläuft.The tapping device is designed in such a way that the outflow channel on the outside of the vessel wall opens into a tapping channel of the tapping device. When the metallurgical vessel is in a melting position, the tapping channel initially extends upwards - at an absolute angle of 0° to 20° to the force of gravity, preferably at an absolute angle of 0° to 5° to the force of gravity, opposite to the direction of the force of gravity - to an overflow channel - which extends essentially at an angle of 90 ° to the force of gravity - and the overflow channel opens into a tap hole channel which - essentially in the direction of the force of gravity - at an absolute angle of 0 ° to 20 ° to the force of gravity, preferably at an absolute angle from 0° to 5° to the earth's gravity - runs downwards to a tap opening.
In der
Eine in dieser Schrift offenbarte Abstichvorrichtung zeigt in Phasen von Prozessen, bei welchen es zwischen den Schmelzen zu Stillständen kommt, die Tendenz zum Erstarren der Schmelze im Kanal der Abstichvorrichtung. In der offenbarten Abtichvorrichtung beginnt der Kanal auf gleicher Höhe mit dem Gefäßboden, wodurch der Kanal auch immer mit flüssigem Stahl geflutet ist. Es kann somit vorkommen, dass bei Prozesspausen das flüssige Metall erstarrt. Dieses erstarrte Metall muss anschließend wieder durch flüssiges Metall, welches beim Start einer neuen Prozessphase entsteht, aufgeschmolzen werden.A tapping device disclosed in this document shows a tendency for the melt to solidify in the channel of the tapping device in phases of processes in which standstills occur between the melts. In the tapping device disclosed, the channel begins at the same level as the bottom of the vessel, which means that the channel is always flooded with liquid steel. It can therefore happen that the liquid metal solidifies during breaks in the process. This solidified metal must then be melted again with liquid metal, which is created when a new process phase starts.
Dies wird zusätzlich mit einer langen Sauerstofflanze, welche von oben in den Kanal eingeführt wird, unterstützt. Dieser Aufschmelzprozess kann sich über mehrere Stunden erstrecken. Des Weiteren besteht auch bei der ersten Schmelze immer die Gefahr, dass das flüssige Metall sofort in den Kanal fließt und dort, aufgrund mangelnder Temperatur im Kanal dort wieder erstarrt.This is additionally supported with a long oxygen lance, which is inserted into the canal from above. This melting process can take several hours. Furthermore, even with the first melt, there is always the risk that the liquid metal will immediately flow into the channel and solidify again there due to a lack of temperature in the channel.
Die Aufgabe der vorliegenden Erfindung ist es eine einfache Bauart der Abstichvorrichtung zur Verfügung zu stellen, bei welcher das Erstarren von flüssigem Metall im Abtichkanal verhindert wird.The object of the present invention is to provide a simple design of the tapping device in which the solidification of liquid metal in the tapping channel is prevented.
Die Aufgabe wird dadurch gelöst, dass sich eine Unterkante des Abflusskanal an der Gefäßwand, gemessen an einer Innenseite der Gefäßwand von einer Schnittkante der Gefäßwand und dem Gefäßboden, in einer Höhe von 50-300mm befindet, wobei der Abflusskanal sich zumindest in einem Teilbereich der Gefäßwand im Wesentlichen im 90° Winkel zur Gefäßwand durch diese hindurch erstreckt.The object is achieved in that a lower edge of the drainage channel is located on the vessel wall, measured on an inside of the vessel wall from a cutting edge of the vessel wall and the vessel bottom, at a height of 50-300mm, with the drainage channel being at least in a partial area of the vessel wall extends through the vessel wall essentially at a 90° angle to the vessel wall.
Die Höhe der Stufe ist einerseits von der Größe des Gefäßes abhängig und andererseits von der jeweiligen Prozessfahrweise des metallurgischen Ofens.The height of the step depends, on the one hand, on the size of the vessel and, on the other hand, on the respective process operation of the metallurgical furnace.
Diese Stufe erlaubt es, dass auch in der Einschmelzphase flüssiges Metall zeitlich verzögert, in den Abflusskanal gelangt und somit eine längere Phase vorliegt, in welcher der Abflusskanal erwärmt wird, und somit ein Erstarren im Abflusskanal, wegen mangelnder Temperatur der Ausmauerung im Abflusskanal, vermieden wird.This stage allows liquid metal to enter the drain channel with a time delay, even in the melting phase, and thus there is a longer phase in which the drain channel is heated, and thus solidification in the drain channel is avoided due to insufficient temperature of the brick lining in the drain channel .
Der Abflusskanal sollte sich zumindest in einem Teilbereich der Gefäßwand, bevorzugt über die gesamte Breite der Gefäßwand, im 90° Winkel zur Gefäßwand aufweisen, da eine derartige Stufe besonders einfach und kostengünstig herstellbar ist.The outflow channel should be at a 90° angle to the vessel wall at least in a partial area of the vessel wall, preferably over the entire width of the vessel wall, since such a step can be produced particularly easily and inexpensively.
Die Höhe der Stufe wird bevorzugt so festgelegt, dass sich ein definierter Sumpf des flüssigen Metalls entweder unterhalb oder oberhalb der Stufe befindet. Dabei kann der Focus sein, entweder den Einlauf des Sumpfs des flüssigen Metalls in den Abflusskanal zu verzögern oder durch das vollständige Abdecken des Abflusskanals mit flüssigem Metall um den Schlacke - Einlauf gänzlich zu verhindern. Die Höhe der Unterkante wird in Abhängigkeit des prozentualen Anteils eines Sumpfes von flüssigem Metall- welcher nach dem Abstich im metallurgischen Schmelzgefäß verbleibt - an einem Abstichgewicht des metallurgischen Gefäßes festgelegt, der im Bereich von 15%-70% liegen kann. Die Höhe der Unterkante kann so gewählt werden, dass in den kritischen Prozessphasen, wie beispielsweise Prozesspausen, das im Ofen verbliebene flüssige Metall vollständig im Schmelzgefäß verbleibt und der Abflusskanal vollständig leerlaufen kann. Der Abflusskanal kann neben einem Rechteckquerschnitt beispielsweise auch einen Gewölbe - Querschnitt oder einen runden Querschnitt aufweisen. Wenn die Unterkante keine Gerade ist, dann wird immer jene Höhe verstanden, die den geringsten Abstand zur Schnittkante der Gefäßwand und des Gefäßbodens aufweist.The height of the stage is preferably set so that a defined sump of liquid metal is either below or above the stage. The focus can be either to delay the inflow of the liquid metal sump into the drainage channel or to completely prevent the slag from flowing in by completely covering the drainage channel with liquid metal. The height of the lower edge is determined depending on the percentage of a sump of liquid metal - which remains in the metallurgical melting vessel after tapping - of a tapping weight of the metallurgical vessel, which can be in the range of 15%-70%. The height of the lower edge can be chosen so that in the critical process phases, such as process breaks, the liquid metal remaining in the furnace remains completely in the melting vessel and the drainage channel can run completely empty. The drain channel In addition to a rectangular cross-section, it can also have a vaulted cross-section or a round cross-section. If the lower edge is not a straight line, then the height is always understood to be that which is the shortest distance from the cutting edge of the vessel wall and the vessel bottom.
In einer bevorzugten Ausführung weist die Unterkante und/oder eine Oberkante eine Fase auf. Die Fase hat bevorzugt eine Abmessung in horizontaler und vertikaler Richtung oder einen Radius von zumindest 10 mm, besonders bevorzugt von zumindest 20mm. Durch die Fase oder den Radius erfolgt ein besseres Einströmen in den Abflusskanal.In a preferred embodiment, the lower edge and/or an upper edge has a chamfer. The chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm. The bevel or radius allows for better flow into the drainage channel.
Eine Ausflusszahl erhöht sich durch das Prinzip der abgerundeten oder gefasten Unterkante und/oder Oberkante und erhöht so eine Durchflussmenge.A flow number increases due to the principle of the rounded or chamfered lower edge and/or upper edge and thus increases a flow rate.
In einer vorteilhaften Ausführung weist zumindest eine Seitenkante des Abflusskanal eine Fase oder einen Radius auf. Die Fase hat bevorzugt eine Abmessung in horizontaler und vertikaler Richtung oder einen Radius von zumindest 10 mm, besonders bevorzugt von zumindest 20mm. Durch die Fase erfolgt ein besseres Einströmen in den Abflusskanal. Durch das gleichmäßigere Einströmen des flüssigen Metalls von allen Seiten, wird eine Einlauf-Geschwindigkeit des flüssigen Metalls auf einen Querschnitt des Abflusskanals harmonisiert. Die einseitige Abnutzung der Oberkante reduziert sich und der Abrieb verteilt sich gleichmäßiger auf alle Seitenteile. Die Standzeit des Abflusskanals wird so verlängert.In an advantageous embodiment, at least one side edge of the drainage channel has a chamfer or a radius. The chamfer preferably has a dimension in the horizontal and vertical directions or a radius of at least 10 mm, particularly preferably at least 20 mm. The bevel allows for better flow into the drainage channel. Because the liquid metal flows in more evenly from all sides, the inlet speed of the liquid metal is harmonized across a cross section of the outflow channel. The one-sided wear on the top edge is reduced and the abrasion is distributed more evenly across all side parts. This extends the service life of the drain channel.
In einer weiteren bevorzugten Ausführungsform liegt die Abstichöffnung oberhalb einer Unterkante an einer Außenfläche des Gefäßbodens. Aufgrund dessen, dass die Unterkante des Abflusskanales oberhalb des Gefäßboden liegt, kann eine Gefäßbodenunterkante im Bereich des Abflusskanales nach oben versetzt werden, um die gleiche Dicke der Feuerfest Ausmauerung zu erzielen. Dies erlaubt es die Abstichöffnung nach oben zu versetzen, um eine kürzere Länge des Abstichlochkanales zur Abstichöffnung zu erhalten. Durch die kürzere Länge vermindert sich die Gefahr von Verstopfungen des Kanals.In a further preferred embodiment, the tapping opening is located above a lower edge on an outer surface of the vessel bottom. Due to the fact that the lower edge of the drainage channel is above the bottom of the vessel, a lower edge of the vessel bottom can be moved upwards in the area of the drainage channel in order to achieve the same thickness of the refractory lining. This allows the tap opening to be moved upwards in order to obtain a shorter length of the tap hole channel to the tap opening. The shorter length reduces the risk of the canal becoming blocked.
In einer zweckmäßigen Ausführung ist ein Brenner mittig zum Abstichkanal plaziert ist, wobei der Brenner eine Leistung von mindestens 0,2 MW und maximal 1 MW aufweist. Durch die mittige Anordnung des Brenners reduziert sich ein Verschleiß der Feuerfestausmauerung im Überlaufkanal und im Abstichkanal.In an expedient embodiment, a burner is placed in the middle of the tapping channel, the burner having an output of at least 0.2 MW and a maximum of 1 MW. The central arrangement of the burner reduces wear on the refractory lining in the overflow channel and tapping channel.
Eine vorteilhafte Ausführung sieht vor, dass ein Verhältnis von hydraulischem Durchmesser des Abflusskanal zu einem Durchmesser der Abstichöffnung zumindest größer als 0,9 ist.An advantageous embodiment provides that a ratio of the hydraulic diameter of the drainage channel to a diameter of the tap opening is at least greater than 0.9.
Der hydraulische Durchmesser wird berechnet durch die Gleichung 1.
- dh...
- hydraulischer Durchmesser
- A...
- Fläche
- U...
- Umfang
- ie...
- hydraulic diameter
- A...
- Area
- U...
- Scope
Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung eines Ausführungsbeispiels, das im Zusammenhang mit den Zeichnungen näher erläutert wird. Dabei zeigen:
In der
In der
Durch diese Ausführung ist das gleichmäßigere Einströmen des flüssigen Metalls von allen Seiten besonders gut harmonisiert. Die einseitige Abnutzung der Oberkante reduziert sich. Der Abrieb verteilt sich gleichmäßiger auf alle vier Seiten des Abflusskanal 5. Die Standzeit des Abflusskanals wird so verlängert.This design ensures that the liquid metal flows in particularly well from all sides. The one-sided wear of the upper edge is reduced. The abrasion is distributed more evenly on all four sides of the
In der
Des Weiteren ist in dieser Ausführung ein Brenner 15 mittig zum Abstichkanal 11, welcher sich vom Abflusskanal 4 bis zum Überlaufkanal 12 erstreckt.Furthermore, in this embodiment there is a
In der
Obwohl die Erfindung im Detail durch die bevorzugten Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been illustrated and described in detail by the preferred embodiments, the invention is not limited by the examples disclosed and other variations may be derived therefrom by those skilled in the art without departing from the scope of the invention.
- 11
- Metallurgisches GefäßMetallurgical vessel
- 22
- Gefäßbodenvessel bottom
- 2a2a
- Außenseite des GefäßbodensOutside of the bottom of the vessel
- 2b2 B
- Unterkante des GefäßbodensLower edge of the bottom of the vessel
- 33
- Gefäßwandvessel wall
- 3a3a
- Innenseiteinside
- 3b3b
- AußenseiteOutside
- 3c3c
- Feuer - Fest AusmauerungFire - festival lining
- 3d3d
- Stahlkonstruktionsteel construction
- 44
- Abflusskanaldrainage channel
- 55
- UnterkanteBottom edge
- 5a5a
- Fasechamfer
- 5b5b
- SeitenwandSide wall
- 5c5c
- Fase der SeitenwandChamfer of the side wall
- 5d5d
- OberkanteTop edge
- 99
- BodenabstichBottom tap
- 1010
- Abstichvorrichtungtapping device
- 10a10a
- Feuerfest - AusmauerungFireproof - brick lining
- 10b10b
- Stahlkonstruktionsteel construction
- 1111
- AbstichkanalTap channel
- 1212
- Überlaufkanaloverflow channel
- 1313
- Abstichlochkanaltap hole channel
- 1414
- AbstichöffnungTap opening
- 1515
- Brennerburner
- HH
- HöheHeight
- AA
- Abmessungdimension
- dd
- Durchmesserdiameter
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22186913.4A EP4311994A1 (en) | 2022-07-26 | 2022-07-26 | Metallurgical vessel with a tapping device for the controlled tapping of liquid metal |
PCT/EP2023/070592 WO2024023095A1 (en) | 2022-07-26 | 2023-07-25 | Metallurgical vessel with a tapping device for the controlled tapping of liquid metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22186913.4A EP4311994A1 (en) | 2022-07-26 | 2022-07-26 | Metallurgical vessel with a tapping device for the controlled tapping of liquid metal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4311994A1 true EP4311994A1 (en) | 2024-01-31 |
Family
ID=82742932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22186913.4A Pending EP4311994A1 (en) | 2022-07-26 | 2022-07-26 | Metallurgical vessel with a tapping device for the controlled tapping of liquid metal |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4311994A1 (en) |
WO (1) | WO2024023095A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH665976A5 (en) * | 1984-05-18 | 1988-06-30 | Marti Technologie | Collection vessel fitted to tapping hole of furnace - to enable slag-free melt tapping |
US6596221B1 (en) * | 1999-04-01 | 2003-07-22 | Arcmet Technologie Gmbh | Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel |
KR20050010620A (en) * | 2003-07-22 | 2005-01-28 | 주식회사 포스코 | Opener of eccentric buttom tapping |
DE102004050701B3 (en) * | 2004-10-18 | 2006-04-06 | Refractory Intellectual Property Gmbh & Co. Kg | Tapping tube for a metallurgical melting vessel |
CN107062900A (en) * | 2017-06-20 | 2017-08-18 | 许玉蕊 | A kind of alternating current arc smelting furnace |
-
2022
- 2022-07-26 EP EP22186913.4A patent/EP4311994A1/en active Pending
-
2023
- 2023-07-25 WO PCT/EP2023/070592 patent/WO2024023095A1/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH665976A5 (en) * | 1984-05-18 | 1988-06-30 | Marti Technologie | Collection vessel fitted to tapping hole of furnace - to enable slag-free melt tapping |
US6596221B1 (en) * | 1999-04-01 | 2003-07-22 | Arcmet Technologie Gmbh | Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel |
EP1181491B1 (en) | 1999-04-01 | 2003-08-06 | Arcmet Technologie Gmbh | Metallurgical vessel comprising a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel |
KR20050010620A (en) * | 2003-07-22 | 2005-01-28 | 주식회사 포스코 | Opener of eccentric buttom tapping |
DE102004050701B3 (en) * | 2004-10-18 | 2006-04-06 | Refractory Intellectual Property Gmbh & Co. Kg | Tapping tube for a metallurgical melting vessel |
CN107062900A (en) * | 2017-06-20 | 2017-08-18 | 许玉蕊 | A kind of alternating current arc smelting furnace |
Also Published As
Publication number | Publication date |
---|---|
WO2024023095A1 (en) | 2024-02-01 |
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