US20070216073A1 - Tapping Tube for a Metallurgical Fusion Pot - Google Patents
Tapping Tube for a Metallurgical Fusion Pot Download PDFInfo
- Publication number
- US20070216073A1 US20070216073A1 US11/568,181 US56818105A US2007216073A1 US 20070216073 A1 US20070216073 A1 US 20070216073A1 US 56818105 A US56818105 A US 56818105A US 2007216073 A1 US2007216073 A1 US 2007216073A1
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- United States
- Prior art keywords
- tapping tube
- tapping
- section
- tube according
- component
- 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.)
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Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
-
- 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
Definitions
- the invention relates to a tapping tube for a metallurgical melting vessel.
- a metallurgical melting vessel is defined as an apparatus in which a metallurgical melt is produced, treated, and/or transported, for example a converter or an arc furnace.
- Metal melt in the melting vessel is fed to a downstream apparatus via the tapping tube.
- steel is fed from the converter to a downstream continuous casting installation via a ladle.
- the metal melt should be as free from impurities as possible when it is transported. For example, contact with the ambient atmosphere (oxygen, nitrogen) should be avoided as well as the inclusion of slag.
- a converter tapping spout is known from EP 0 057 946 B1 which includes a plurality of fireproof blocks or discs, connected to each other axially.
- the converter tapping spout may also be monolithic with the same geometry.
- FIG. 1 shows this prior art, which has proven its commercial value for a long time.
- the central through-flow channel for the metal melt material may be conical, cylindrical, or reduced in steps from the inflow end to the outflow end. In any case, when metal melt is passed through, it quickly causes erosion of the outer wall in the through-flow channel, so that its cross section is constantly being enlarged during operation, as is shown schematically in FIG. 2 .
- the object of the invention is to provide a tapping tube (spout) that enables tapping times to remain as constant as possibly for the entire period of use, while minimising nonproductive times.
- the main idea of the invention is to construct the tapping tube in two functional parts, a first part that may be configured in accordance with prior art, and a second part that may be connected to the first part thereby creating a complete tapping tube and which is easily replaceable (exchangeable).
- the invention is based on the realisation that the section of the tapping tube that determines the nature of the flow is the outflow end.
- the cross section at the outflow end determines the outflow quantity and thus also the outflow time (tapping time) of the metal melt.
- This is the “outer” part, that is to say the part farthest from the melting bath in the metallurgical vessel, so that the relatively lowest temperatures occur here, which makes it easier to replace a corresponding tapping part.
- FIG. 3 The basic inventive concept is presented in FIG. 3 based on FIGS. 1 and 2 . It should be noted that the upper part of the tapping arrangement, starting from inflow end E, has been taken without changes from prior art, and an approximated condition of wear of FIG. 2 is reflected in FIG. 3 .
- an end A at the outflow side of the tapping tube is designed as a separate, replaceable assembly B, which is sealingly connected to the adjacent part of the tapping tube, as will be described in detail.
- the replaceable component B which is essentially cylindrical in shape, has a through-flow channel D 1 , the cross sectional area of which corresponds to a target cross sectional area of the through-flow channel without any wear.
- annular shoulder S will be formed in the transition region to the upper part of the tapping tube, but this is deliberately accepted, because repairing of the upper part of the tapping tube is not acceptable for the reasons given, and is also not necessary from a technological point of view, because the tapping time and the mass flow of the tapped metal melt is determined only by the cross section of the through-flow channel at outflow end A.
- connection zone between replaceable component B and the fixed part of the tapping tube must be leak-proof, but it must also be designed such that component B is easily detachable. To this end, the following suggested solutions are described.
- the invention thus relates to a tapping tube for a metallurgical melting vessel having the following features:
- cylindrical includes sections having a circular cross section, but also all other sectional geometries. This applies for both internal and external sections of the tube.
- the tube In the axial direction (direction of flow of the metal melt), the tube may be cylindrical or conical in shape. Other shapes are also possible, for example a stepped surface.
- the internal and the external cross section may be polygonal or oval. Any polygonal shape is possible.
- the most critical point for the tapping tube of the invention is that the replaceable part delimits through-flow channel D (D 1 ) peripherally.
- part B extends over the entire cross sectional area of the tapping tube.
- part is implemented in the lower (outflow side) end section of the tapping tube, as will be illustrated in the following.
- the cylindrical part may have any internal cross section.
- the through-flow channel has a round or oval internal cross section in the area of the part.
- the cross sectional area should match the target cross section area for the purpose of assuring the desired mass flow and tapping time.
- the through-flow channel in the area of the part may have a constant internal cross section when viewed from the top of the part but it may also be conformed to be slightly conical or stepped towards the outflow end.
- the cylindrical component (part) may be fitted in an outer, cylindrical end section of the tapping tube. In this way, the target length of the tapping tube remains unchanged. Only a changing sleeve is disposed detachably on the outflow end.
- this may also be shortened for a predetermined length of the tapping tube, in which case when the replaceable part is installed it restores the tapping tube to its original length.
- the replaceable component (part) may be fixed on or in the other part of the tapping tube in various ways.
- One possibility is to construct the part with an external thread, which cooperates with a corresponding internal thread.
- This internal thread may be arranged as a separate part in the outflow area of the tapping tube at the associated metallurgical melting vessel. It may also be an integral component of the outflow end of the tapping tube, particularly in the case of the inserted part as described.
- a bayonet connection is also possible instead of a threaded connection.
- the cylindrical replaceable part has buffers along its outer surface or at its outlet end for compression means acting in the direction of the inlet end onto said part.
- the compression means may be springs, for example, that are disposed on a retaining mechanism, which in turn is fixed to the outside of the metallurgical melting vessel.
- the determining feature is that the replacement component is biased towards the inflow end of the tapping tube in such a manner that a leak-proof joint is created with the remaining part of the tapping tube.
- the corresponding retaining means are therefore disposed particularly at the free lower front surface or on the outer periphery of the part.
- the quality of the seal may be improved if the front face on the mounted end of the part has a contoured surface, i.e., it is not smooth.
- a contoured surface i.e., it is not smooth.
- Such contouring may consist of individual, discrete knobs or ridges.
- the contouring may also comprise rib-like projections in a concentric or spiral arrangement.
- the surface of the tapping tube against which the front surface of the changing component is pressed may also be conformed in the same way.
- a further alternative provides for placing a seal between the corresponding surfaces of the tapping tube and the component. Particularly if the corresponding surface sections of the fireproof material are more or less flat, it is sensible to conform the normally annular seal with surface contouring such as was described previously.
- these profiling enable a certain elasticity and thus also deformability when the part is mounted onto the remaining section of the tapping tube.
- a suitable sealing material is graphite, for example, since this also has the corresponding thermal resistance.
- the seal may also be produced from a sealing compound, for example as an emulsion of flake graphite and oil.
- the contact surface (frontal surface) of the described part with the ceramic section of the other part of the tapping tube may be flat (in particular perpendicular to the central longitudinal axis of the tapping tube) or convex, particularly cambered, which is to say arched towards the inflow end.
- the part may include a temporary barrier for a “first slag”.
- This first slag flows into the tapping tube (and subsequently into the downstream metallurgical melting vessel) when the converter is tipped, and this is undesirable.
- the invention therefore provides that the component be constructed with a blocking element that temporarily fills the entire internal cross section (through-flow channel).
- “temporary” means that the blocking effect only needs to be very short, a few seconds for example, before metal melt flows into the tapping channel in the tapping process.
- Such a blocking element may be a thin metal panel, for example, or a type of cup, which are placed in the through-flow channel of the component (part), for example via spring arms (claws) on the peripheral surface thereof.
- the component may generally be of any length. The most important is, as described above,the outflow cross section at the outflow end. However, the operating life of the part may be prolonged if it is at least 1.5 times as long as the smallest internal diameter, a ratio of 1.5 to 3 usually being sufficient. This length is also important for obtaining the desired characteristic of the outflowing melt. In particular, a uniform outflow of the melt is achieved.
- the tapping tube described enables highly constant tapping times to be achieved, and thus also improved availability of the melting unit.
- Replacement of the end component may be automated. Since it is replaced from the outside, this may be performed easily and quickly. It is fitted in such manner that the outflow end of the tapping tube lies more or less flush with the outer wall of the metallurgical melting vessel.
- the end part may be made from the same material as the rest of the tapping tube. Or the two sections may also be produced from different materials.
- the part may be constructed from a highly wear-resistant material grade.
- Different thermal expansions of different materials may be compensated by the sealing area described previously, and/or by an elastic retaining mechanism for the component.
- FIG. 4 a partial cross section of an end section of a tapping tube
- FIG. 5 a top view of and a section through surface 24 of the replaceable component of the tapping tube of FIG. 4 ,
- FIG. 6 a partial sectional view of another embodiment of a tapping tube, in which only the lower part is shown.
- FIG. 4 shows the lower part of a tapping tube 10 , which is fitted in a refractory lining of a converter 12 which shows on outer metal envelope 14 .
- an end section 18 of tapping tube 10 has an extended inner recess 20 , in this case with a cylindrical wall surface.
- a metal ring 22 is adhered to the wall area of end section 18 directly adjacent outflow end 16 , and has an internal thread.
- Component B is cylindrical.
- the external diameter of component B corresponds to the internal diameter of recess 20 . This enables component B to be inserted into recess 20 along the described thread until it lies flush in closing manner with end section 18 and metal envelope 14 at outflow end 16 .
- Component B has a central through-flow channel D 1 which has a circular cross section, and which matches a target cross section of through-flow channel D at the outflow end of tapping tube 10 .
- a graphite seal 28 is situated between an upper frontal surface 24 of component B and the corresponding contact surface 26 of section 18 , and is compressed into recess 20 when component B is screwed in, so that the size of seal 28 is exaggerated in the drawing.
- component B When tapping tube 10 becomes worn, as shown in FIGS. 2, 3 , component B is also susceptible to wear, but only component B is replaced, thereby creating an arrangement that essentially corresponds to that of FIG. 3 . In these circumstances, component B is unscrewed from recess 20 and a new component with a defined through-flow channel D 1 is inserted instead.
- FIG. 5 shows a cross section (bottom) and a top view (top) of the conformation of frontal surface 24 of component B with concentric, raised ribs 24 r, wherein seal 28 is advantageously able to be pressed into the depressions formed between ribs 24 r, thus enhancing the sealing effect.
- Component B is not disposed in a recess 20 of end section 18 of tapping tube 10 .
- the upper part of tapping tube 10 is shortened by the length (height) of component B, with the result that contact surface 26 for component B extends over the entire wall thickness of tube 10 .
- component B with central through-flow channel D 1 which has a circular cross section—is a truncated cone and is disposed in a corresponding metal sleeve 30 , which is furnished with a ridge 32 running radially.
- Retaining arms 34 abut this ridge 32 , and are biased towards the upper part of taping tube 10 via compression springs 36 .
- Springs 36 are supported on arms 38 , which are fixed at the metal envelope 14 of the metallurgical melting vessel (not shown in detail). Projecting parts form a retaining mechanism for component B.
- a seal for example a graphite foil, may also be disposed between surfaces 24 , 26 , which may also be contoured.
- component B may be replaced quickly by detaching the retaining mechanism.
- the new component B (with through-flow channel D 1 ) is then fixed with the retaining mechanism and then provides an outflow cross section with defined target diameter for subsequent tapping operations.
- FIG. 6 also shows a schematic representation of a pot-shaped blocking element 40 , produced from thin sheet metal, and the peripheral lip of which rests on the upper frontal surface 24 of component B when the component is pressed against corresponding contact surface 26 .
- Blocking element 40 prevents the first slag from getting into a downstream melting vessel when the metal melt is tapped along through-flow channel D. Only a small amount of slag is able to advance through-flow channel D up to blocking element 40 .
- the slag in the inflow part of tapping tube 10 can either float upwards or drain out as part of the slag when blocking element 40 has melted. Thereafter, only molten metal passes through tapping tube 10 .
- the illustrated blocking element represents just one possible design solution.
- the essential feature is that when component B is changed, a fresh blocking element with the same function is able to be installed at the same time, which then blocks through-flow channel D temporarily.
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Charging Or Discharging (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Tubes (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
- The invention relates to a tapping tube for a metallurgical melting vessel. A metallurgical melting vessel is defined as an apparatus in which a metallurgical melt is produced, treated, and/or transported, for example a converter or an arc furnace.
- Metal melt in the melting vessel is fed to a downstream apparatus via the tapping tube. For example, steel is fed from the converter to a downstream continuous casting installation via a ladle.
- The metal melt should be as free from impurities as possible when it is transported. For example, contact with the ambient atmosphere (oxygen, nitrogen) should be avoided as well as the inclusion of slag.
- A converter tapping spout is known from EP 0 057 946 B1 which includes a plurality of fireproof blocks or discs, connected to each other axially. The converter tapping spout may also be monolithic with the same geometry.
FIG. 1 shows this prior art, which has proven its commercial value for a long time. The central through-flow channel for the metal melt material may be conical, cylindrical, or reduced in steps from the inflow end to the outflow end. In any case, when metal melt is passed through, it quickly causes erosion of the outer wall in the through-flow channel, so that its cross section is constantly being enlarged during operation, as is shown schematically inFIG. 2 . - It is evident that as the cross section of the through-flow channel changes, the quantity of metal melt flowing through the tapping tube per time unit also changes. This change is all but completely uncontrolled, since the removal of the refractory material is also largely uncontrolled.
- Attempts have therefore been made to repair the tapping tubes of the kind described after a certain tapping time, for example by introducing a cylindrical template into the through-flow channel that was enlarged by erosion and spraying a refractory mass behind the template. This method is time-consuming and is associated with considerable difficulties at the hot furnace unit.
- The object of the invention is to provide a tapping tube (spout) that enables tapping times to remain as constant as possibly for the entire period of use, while minimising nonproductive times.
- The main idea of the invention is to construct the tapping tube in two functional parts, a first part that may be configured in accordance with prior art, and a second part that may be connected to the first part thereby creating a complete tapping tube and which is easily replaceable (exchangeable).
- The invention is based on the realisation that the section of the tapping tube that determines the nature of the flow is the outflow end. The cross section at the outflow end determines the outflow quantity and thus also the outflow time (tapping time) of the metal melt. This is the “outer” part, that is to say the part farthest from the melting bath in the metallurgical vessel, so that the relatively lowest temperatures occur here, which makes it easier to replace a corresponding tapping part.
- The basic inventive concept is presented in
FIG. 3 based onFIGS. 1 and 2 . It should be noted that the upper part of the tapping arrangement, starting from inflow end E, has been taken without changes from prior art, and an approximated condition of wear ofFIG. 2 is reflected inFIG. 3 . - The essential difference compared with prior art consists in that an end A at the outflow side of the tapping tube is designed as a separate, replaceable assembly B, which is sealingly connected to the adjacent part of the tapping tube, as will be described in detail.
- The replaceable component B, which is essentially cylindrical in shape, has a through-flow channel D1, the cross sectional area of which corresponds to a target cross sectional area of the through-flow channel without any wear.
- Of course there will be as well a wear of the refractory material in the area of through-flow channel D1, and the cross section of this area will increase over time as well. But as soon as this cross section increase reaches a given value, assembly B is quickly replaced without making or having to make any changes to the upstream section in the direction of flow (referred to in the following as the upper section). When a new assembly B has been fitted, an annular shoulder S will be formed in the transition region to the upper part of the tapping tube, but this is deliberately accepted, because repairing of the upper part of the tapping tube is not acceptable for the reasons given, and is also not necessary from a technological point of view, because the tapping time and the mass flow of the tapped metal melt is determined only by the cross section of the through-flow channel at outflow end A.
- Of course, the connection zone between replaceable component B and the fixed part of the tapping tube must be leak-proof, but it must also be designed such that component B is easily detachable. To this end, the following suggested solutions are described.
- It is also evident that the “loose” component B must be firmly secured in the position shown in
FIG. 3 to ensure that it does not become detached from the upper section of the tapping tube. To this end, the invention offers several different solutions, which are also presented in the following. - In its most general embodiment, the invention thus relates to a tapping tube for a metallurgical melting vessel having the following features:
-
- the tapping tube has a through-flow channel for a metal melt, which channel connects an inflow end and an outflow end,
- starting from the outflow end, the tapping tube encloses a cylindrical end section that is constructed as a separate, cylindrical part adjacent the through-flow channel,
- the first end of the part, the end that comprises the outflow end of the tapping tube, is constructed to ensure a fixed but detachable fitting of the part in a retaining device, the second end of the part has a front surface facing the inflow end, which surface being tightly arranged against an axially adjacent section of the tapping tube when the part is in a retained position.
- The term cylindrical includes sections having a circular cross section, but also all other sectional geometries. This applies for both internal and external sections of the tube. In the axial direction (direction of flow of the metal melt), the tube may be cylindrical or conical in shape. Other shapes are also possible, for example a stepped surface. Besides a circular cross section, the internal and the external cross section may be polygonal or oval. Any polygonal shape is possible.
- The most critical point for the tapping tube of the invention is that the replaceable part delimits through-flow channel D (D1) peripherally.
- This includes embodiments, as shown in
FIG. 3 , in which part B extends over the entire cross sectional area of the tapping tube. However, it also includes embodiments in which the part is implemented in the lower (outflow side) end section of the tapping tube, as will be illustrated in the following. - The cylindrical part may have any internal cross section. For example, the through-flow channel has a round or oval internal cross section in the area of the part. The cross sectional area should match the target cross section area for the purpose of assuring the desired mass flow and tapping time.
- The through-flow channel in the area of the part may have a constant internal cross section when viewed from the top of the part but it may also be conformed to be slightly conical or stepped towards the outflow end.
- As was indicated previously, the cylindrical component (part) may be fitted in an outer, cylindrical end section of the tapping tube. In this way, the target length of the tapping tube remains unchanged. Only a changing sleeve is disposed detachably on the outflow end.
- However, as shown in
FIG. 3 , this may also be shortened for a predetermined length of the tapping tube, in which case when the replaceable part is installed it restores the tapping tube to its original length. - The replaceable component (part) may be fixed on or in the other part of the tapping tube in various ways. One possibility is to construct the part with an external thread, which cooperates with a corresponding internal thread. This internal thread may be arranged as a separate part in the outflow area of the tapping tube at the associated metallurgical melting vessel. It may also be an integral component of the outflow end of the tapping tube, particularly in the case of the inserted part as described.
- A bayonet connection is also possible instead of a threaded connection.
- According to one embodiment, the cylindrical replaceable part has buffers along its outer surface or at its outlet end for compression means acting in the direction of the inlet end onto said part.
- The compression means may be springs, for example, that are disposed on a retaining mechanism, which in turn is fixed to the outside of the metallurgical melting vessel.
- The determining feature is that the replacement component is biased towards the inflow end of the tapping tube in such a manner that a leak-proof joint is created with the remaining part of the tapping tube. The corresponding retaining means are therefore disposed particularly at the free lower front surface or on the outer periphery of the part.
- The quality of the seal may be improved if the front face on the mounted end of the part has a contoured surface, i.e., it is not smooth. Such contouring may consist of individual, discrete knobs or ridges. The contouring may also comprise rib-like projections in a concentric or spiral arrangement.
- Alternatively or additionally, the surface of the tapping tube against which the front surface of the changing component is pressed may also be conformed in the same way.
- A further alternative provides for placing a seal between the corresponding surfaces of the tapping tube and the component. Particularly if the corresponding surface sections of the fireproof material are more or less flat, it is sensible to conform the normally annular seal with surface contouring such as was described previously.
- Regardless of whether these profiles are formed within the refractory material and/or being part of the sealing component, these profiling enable a certain elasticity and thus also deformability when the part is mounted onto the remaining section of the tapping tube.
- A suitable sealing material is graphite, for example, since this also has the corresponding thermal resistance. The seal may also be produced from a sealing compound, for example as an emulsion of flake graphite and oil.
- The contact surface (frontal surface) of the described part with the ceramic section of the other part of the tapping tube may be flat (in particular perpendicular to the central longitudinal axis of the tapping tube) or convex, particularly cambered, which is to say arched towards the inflow end.
- At the same time, the part may include a temporary barrier for a “first slag”. This first slag flows into the tapping tube (and subsequently into the downstream metallurgical melting vessel) when the converter is tipped, and this is undesirable. The invention therefore provides that the component be constructed with a blocking element that temporarily fills the entire internal cross section (through-flow channel). In this context, “temporary” means that the blocking effect only needs to be very short, a few seconds for example, before metal melt flows into the tapping channel in the tapping process.
- Such a blocking element may be a thin metal panel, for example, or a type of cup, which are placed in the through-flow channel of the component (part), for example via spring arms (claws) on the peripheral surface thereof.
- The component may generally be of any length. The most important is, as described above,the outflow cross section at the outflow end. However, the operating life of the part may be prolonged if it is at least 1.5 times as long as the smallest internal diameter, a ratio of 1.5 to 3 usually being sufficient. This length is also important for obtaining the desired characteristic of the outflowing melt. In particular, a uniform outflow of the melt is achieved.
- Because the endpiece is easily exchanged, the tapping tube described enables highly constant tapping times to be achieved, and thus also improved availability of the melting unit. Replacement of the end component may be automated. Since it is replaced from the outside, this may be performed easily and quickly. It is fitted in such manner that the outflow end of the tapping tube lies more or less flush with the outer wall of the metallurgical melting vessel.
- The end part may be made from the same material as the rest of the tapping tube. Or the two sections may also be produced from different materials. For example, the part may be constructed from a highly wear-resistant material grade.
- Different thermal expansions of different materials may be compensated by the sealing area described previously, and/or by an elastic retaining mechanism for the component.
- Additional features of the invention are described in the dependent claims and in the other application documents.
- In the following, the invention will be explained in greater detail with reference to various embodiments. The drawing shows, in schematic form:
-
FIG. 4 : a partial cross section of an end section of a tapping tube, -
FIG. 5 : a top view of and a section throughsurface 24 of the replaceable component of the tapping tube ofFIG. 4 , -
FIG. 6 : a partial sectional view of another embodiment of a tapping tube, in which only the lower part is shown. - Identical or equivalent parts in the figures are identified with the same reference numbers.
-
FIG. 4 shows the lower part of a tappingtube 10, which is fitted in a refractory lining of aconverter 12 which shows onouter metal envelope 14. These features all represent prior art and will therefore not be described further. - Starting from
outflow end 16 of flow-through channel D, anend section 18 of tappingtube 10 has an extendedinner recess 20, in this case with a cylindrical wall surface. Ametal ring 22 is adhered to the wall area ofend section 18 directlyadjacent outflow end 16, and has an internal thread. - This internal thread cooperates with an external thread provided peripherally on a mounting component B. Component B is cylindrical. The external diameter of component B corresponds to the internal diameter of
recess 20. This enables component B to be inserted intorecess 20 along the described thread until it lies flush in closing manner withend section 18 andmetal envelope 14 atoutflow end 16. Component B has a central through-flow channel D1 which has a circular cross section, and which matches a target cross section of through-flow channel D at the outflow end of tappingtube 10. - A
graphite seal 28 is situated between an upperfrontal surface 24 of component B and thecorresponding contact surface 26 ofsection 18, and is compressed intorecess 20 when component B is screwed in, so that the size ofseal 28 is exaggerated in the drawing. - When tapping
tube 10 becomes worn, as shown inFIGS. 2, 3 , component B is also susceptible to wear, but only component B is replaced, thereby creating an arrangement that essentially corresponds to that ofFIG. 3 . In these circumstances, component B is unscrewed fromrecess 20 and a new component with a defined through-flow channel D1 is inserted instead. -
FIG. 5 shows a cross section (bottom) and a top view (top) of the conformation offrontal surface 24 of component B with concentric, raisedribs 24 r, whereinseal 28 is advantageously able to be pressed into the depressions formed betweenribs 24 r, thus enhancing the sealing effect. - In the embodiment of
FIG. 6 , Component B is not disposed in arecess 20 ofend section 18 of tappingtube 10. The upper part of tappingtube 10 is shortened by the length (height) of component B, with the result thatcontact surface 26 for component B extends over the entire wall thickness oftube 10. - The exterior shape of component B with central through-flow channel D1—which has a circular cross section—is a truncated cone and is disposed in a
corresponding metal sleeve 30, which is furnished with aridge 32 running radially. - Retaining
arms 34 abut thisridge 32, and are biased towards the upper part of tapingtube 10 via compression springs 36.Springs 36 are supported onarms 38, which are fixed at themetal envelope 14 of the metallurgical melting vessel (not shown in detail). Projecting parts form a retaining mechanism for component B. - In this way, the upper
frontal surface 24 of component B is forced under the effects ofsprings 36 against matchingcontact surface 26 of the upper part of tappingtube 10. A seal, for example a graphite foil, may also be disposed betweensurfaces - As wear occurs (shown by dashed line L) component B may be replaced quickly by detaching the retaining mechanism. The new component B (with through-flow channel D1) is then fixed with the retaining mechanism and then provides an outflow cross section with defined target diameter for subsequent tapping operations.
- Even as the wear on tapping
tube 10 becomes more advanced (shown by dotted line P), the upper part of tappingtube 10 remains unchanged. However, component B is replaced again as soon as it reaches the wear condition corresponding to the dashed line L again. -
FIG. 6 also shows a schematic representation of a pot-shapedblocking element 40, produced from thin sheet metal, and the peripheral lip of which rests on the upperfrontal surface 24 of component B when the component is pressed againstcorresponding contact surface 26. Blockingelement 40 prevents the first slag from getting into a downstream melting vessel when the metal melt is tapped along through-flow channel D. Only a small amount of slag is able to advance through-flow channel D up to blockingelement 40. As soon as the first slag has been transported past the inflow end of tappingtube 10 by tilting of the melting vessel, only molten metal remains at the top of the inflow end. Now the slag in the inflow part of tappingtube 10 can either float upwards or drain out as part of the slag when blockingelement 40 has melted. Thereafter, only molten metal passes through tappingtube 10. - The illustrated blocking element represents just one possible design solution. The essential feature is that when component B is changed, a fresh blocking element with the same function is able to be installed at the same time, which then blocks through-flow channel D temporarily.
Claims (15)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004050701.5 | 2004-10-18 | ||
DE102004050701A DE102004050701B3 (en) | 2004-10-18 | 2004-10-18 | Tapping tube for a metallurgical melting vessel |
PCT/EP2005/009957 WO2006042597A1 (en) | 2004-10-18 | 2005-09-16 | Tapping tube for a metallurgical fusion pot |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070216073A1 true US20070216073A1 (en) | 2007-09-20 |
Family
ID=35240852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/568,181 Abandoned US20070216073A1 (en) | 2004-10-18 | 2005-09-16 | Tapping Tube for a Metallurgical Fusion Pot |
Country Status (10)
Country | Link |
---|---|
US (1) | US20070216073A1 (en) |
EP (1) | EP1805330A1 (en) |
JP (1) | JP2008516772A (en) |
KR (1) | KR20070068304A (en) |
CN (1) | CN1973054A (en) |
AR (1) | AR051219A1 (en) |
BR (1) | BRPI0513000A (en) |
CA (1) | CA2563472C (en) |
DE (1) | DE102004050701B3 (en) |
WO (1) | WO2006042597A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070164491A1 (en) * | 2004-06-04 | 2007-07-19 | Refractory Intellectual Property Gmbh & Co. Kg | Tapping pipe |
EP3037558A1 (en) * | 2014-12-22 | 2016-06-29 | Refractory Intellectual Property GmbH & Co. KG | Device for inserting a refractory block into a taphole structure of a metallurgical vessel, in particular a basic oxygen furnace, and a method for an automatic supply of the refractory |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010056117B3 (en) * | 2010-12-23 | 2012-04-19 | Zetko Maschinenbau Gmbh | Converter, useful for molten metal, comprises a mantle, a refractory lining arranged in the inner side of the mantle, and tapping channel passing through the refractory lining and mantle, which is close to filling opening |
CN110195982B (en) * | 2019-06-27 | 2024-05-10 | 米易锦秀机械制造有限公司 | Two-section detachable plug |
KR20210154542A (en) | 2020-06-12 | 2021-12-21 | 안재훈 | Customized lunch box service based on body fat measurement wearable device |
CN114807502B (en) * | 2021-01-28 | 2023-12-12 | 宝山钢铁股份有限公司 | Circular seam type rotary-flow rotary furnace bottom blowing element and application method thereof |
EP4311994A1 (en) * | 2022-07-26 | 2024-01-31 | Primetals Technologies Austria GmbH | Metallurgical vessel with a tapping device for the controlled tapping of liquid metal |
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US4984769A (en) * | 1988-12-23 | 1991-01-15 | Didier-Werke Ag | Tap spout for metallurgical vessels and method of repairing |
US5316271A (en) * | 1989-06-01 | 1994-05-31 | Shinagawa Refractories Co., Ltd. | Discharge regulator of molten metal |
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JPH0763484A (en) * | 1993-08-24 | 1995-03-10 | Nippon Steel Corp | Molten steel outlet nozzle on bottom of melting furnace |
JP2860884B2 (en) * | 1994-10-26 | 1999-02-24 | 東芝セラミックス株式会社 | Refractory for controlling molten steel flow rate and sealing method thereof |
JP3012496B2 (en) * | 1995-08-29 | 2000-02-21 | 住友重機械工業株式会社 | Immersion nozzle in continuous casting equipment |
WO2005024069A2 (en) * | 2003-08-29 | 2005-03-17 | Stopinc Aktiengesellschaft | Tapping device for a crucible, especially for a converter |
-
2004
- 2004-10-18 DE DE102004050701A patent/DE102004050701B3/en not_active Expired - Fee Related
-
2005
- 2005-09-16 KR KR1020067026918A patent/KR20070068304A/en not_active Application Discontinuation
- 2005-09-16 CN CNA200580017678XA patent/CN1973054A/en active Pending
- 2005-09-16 CA CA002563472A patent/CA2563472C/en not_active Expired - Fee Related
- 2005-09-16 US US11/568,181 patent/US20070216073A1/en not_active Abandoned
- 2005-09-16 JP JP2007536013A patent/JP2008516772A/en active Pending
- 2005-09-16 BR BRPI0513000-0A patent/BRPI0513000A/en not_active IP Right Cessation
- 2005-09-16 WO PCT/EP2005/009957 patent/WO2006042597A1/en active Application Filing
- 2005-09-16 EP EP05783886A patent/EP1805330A1/en not_active Withdrawn
- 2005-10-14 AR ARP050104309A patent/AR051219A1/en active IP Right Grant
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US2967339A (en) * | 1958-09-26 | 1961-01-10 | Lukens Steel Co | Ladle |
US4474362A (en) * | 1983-03-24 | 1984-10-02 | Flo-Con Systems, Inc. | Valve and method and components thereof |
US4984769A (en) * | 1988-12-23 | 1991-01-15 | Didier-Werke Ag | Tap spout for metallurgical vessels and method of repairing |
US5316271A (en) * | 1989-06-01 | 1994-05-31 | Shinagawa Refractories Co., Ltd. | Discharge regulator of molten metal |
US5335715A (en) * | 1990-08-09 | 1994-08-09 | Nippon Steel Corporation | Method and apparatus for continuous casting |
US5329987A (en) * | 1992-06-22 | 1994-07-19 | Tokyo Yogyo Kabushiki Kaisha | Molten metal pouring pipe for pressure-casting machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070164491A1 (en) * | 2004-06-04 | 2007-07-19 | Refractory Intellectual Property Gmbh & Co. Kg | Tapping pipe |
US7556765B2 (en) * | 2004-06-04 | 2009-07-07 | Refractory Intellectual Property Gmbh & Co., Kg | Tapping pipe |
EP3037558A1 (en) * | 2014-12-22 | 2016-06-29 | Refractory Intellectual Property GmbH & Co. KG | Device for inserting a refractory block into a taphole structure of a metallurgical vessel, in particular a basic oxygen furnace, and a method for an automatic supply of the refractory |
WO2016102110A1 (en) * | 2014-12-22 | 2016-06-30 | Refractory Intellectual Property Gmbh & Co. Kg | Device for inserting a refractory block into a taphole structure of a metallurgical vessel, in particular a basic oxygen furnace, and a method for an automatic supply of the refractory |
US10400294B2 (en) | 2014-12-22 | 2019-09-03 | Refractory Intellectual Property Gmbh & Co. Kg | Device for inserting a refractory block into a taphole structure of a metallurgical vessel, in particular a basic oxygen furnace |
Also Published As
Publication number | Publication date |
---|---|
AR051219A1 (en) | 2006-12-27 |
CA2563472C (en) | 2010-02-02 |
EP1805330A1 (en) | 2007-07-11 |
JP2008516772A (en) | 2008-05-22 |
DE102004050701B3 (en) | 2006-04-06 |
KR20070068304A (en) | 2007-06-29 |
BRPI0513000A (en) | 2008-04-22 |
CN1973054A (en) | 2007-05-30 |
CA2563472A1 (en) | 2006-04-27 |
WO2006042597A1 (en) | 2006-04-27 |
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Legal Events
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AS | Assignment |
Owner name: REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG, AU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LANZENBERGER, ROLAND;SLAMENIK, MANFRED;PUNGERSEK, ROLAND;REEL/FRAME:018422/0203 Effective date: 20061009 Owner name: REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG, AU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LANZENBERGER, RONALD;SLAMENIK, MANFRED;PUNGERSEK, ROLAND;REEL/FRAME:018423/0146 Effective date: 20061009 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |