EP0918092A1 - Cooling devices for shaft furnace - Google Patents
Cooling devices for shaft furnace Download PDFInfo
- Publication number
- EP0918092A1 EP0918092A1 EP98121263A EP98121263A EP0918092A1 EP 0918092 A1 EP0918092 A1 EP 0918092A1 EP 98121263 A EP98121263 A EP 98121263A EP 98121263 A EP98121263 A EP 98121263A EP 0918092 A1 EP0918092 A1 EP 0918092A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling element
- cooling
- elements
- furnace wall
- blast furnace
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 114
- 239000010949 copper Substances 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 9
- 229910001060 Gray iron Inorganic materials 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 206010039509 Scab Diseases 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
- F27B1/24—Cooling arrangements
Definitions
- the invention relates to a cooling element for with a refractory lining shaft furnaces, in particular Blast furnaces consisting of copper or one low-alloy copper alloy with inside arranged coolant channels.
- Cooling systems for the tank of shaft furnaces, in particular Blast furnaces are in "Stahl und Eisen", 106 (1986), No. 5, pages 205-210, described in detail.
- cooling with so-called cooling boxes in recent years cooling with cooling plates, so-called staves, always made of cast iron and copper enforced more.
- 25 280 is a cooling plate made of gray cast iron known in which the cooling channels through cooling pipes were formed, which were poured into the cast body were.
- the disadvantage here is that to avoid the Carburizing requires a coating of the cooling pipes which is the heat flow from the hot side of the cooling plate or the staves through the stave body and the pipe wall to the cooling water. Staves like that therefore often reached high temperatures at which a Pearlite decay occurs (> 760 ° C); it formed Cracks in the cast body, and after a relatively short time Operating time is the casting material in front of the cooling pipes worn away.
- the so-called Copper staves are known from DE 29 07 511 and are made from rolled copper material, the cooling channels through deep hole parallel to Hot side. This creates an undisturbed, not impeded by any pipe coating Heat flow reached.
- Such copper staves are on its hot side much colder than Staves made of gray cast iron, so that - unlike with gray cast iron Staves - there is one stable crust from furniture material that acts as insulation works. It so happens that, despite the high thermal conductivity of this material from one Blast furnace dissipate less heat than gray cast iron staves.
- Another advantage of the copper staves is that these are structurally thinner (approx. 150 mm) can be cast iron staves (approx. 250 mm). Given a Blast furnace profile increases the usable volume The use of copper staves is therefore considerable.
- a disadvantage of the known copper staves is that these are still relatively massive and so are heavy and expensive.
- the processing effort is due to the all-round mechanical processing, the Milling grooves, deep hole drilling and through that Welding the pipe connections considerably.
- the Machined material makes up a significant part of the Total weight and only becomes significantly less Price withdrawn.
- Another disadvantage is that certain channel diameters when drilling deep holes over a depth of 2 - 3 m must not be undercut because otherwise there is a risk that the drill will run.
- the resulting cooling channels are larger than required; the same applies to the amount of cooling water, since a minimum speed of approx. 1.5 m / sec required is to at high thermal stress to remove any steam bubbles that may be forming on the pipe wall.
- the cooling water heating rates are therefore uneconomical low.
- the object of the invention is, in contrast to the well-known copper staves both the material and to reduce the processing effort considerably and still a stable, the rough demands in the blast furnace operation to create grown cooling element that itself can be assembled with little installation effort and one Lifetime in at least the same order of magnitude as has a blast furnace system.
- Another object of the invention is to suitable design of the Flow cross section for the cooling water to higher Heating rates for the cooling water to arrive without therefore the minimum speed required for to fall below the cooling water that is necessary to at high thermal loads on the pipe wall detaching forming vapor bubbles and transporting them away.
- the hot side is designed so that with little effort results in a surface on which Crusts from furniture material can adhere well.
- a conventional Cu cooling element usually has four has parallel cooling channels in a copper block run parallel to the hot side
- a Cooling element according to the invention from a suitable chosen length of an extruded or rolled Cu profile, which is one or more round or of contains cooling channels deviating from the circular shape.
- the extruded or rolled profile both sufficient rigidity brings with it, through which the rough demands of the Endured blast furnace operation; this applies in particular on the or the fastening ribs on the Cooling element on the side facing the furnace Side are arranged. They also serve for Fastening the cooling element to the blast furnace shell.
- the Side webs lying parallel to the blast furnace shell of the copper cooling elements ensure a comprehensive coverage Protection of the blast furnace shell. Your width will be like this determined that they are with the appropriate web of the neighboring element overlap or finish flush. This also makes the diameter or circumference differences in conical parts of the blast furnace (Rest, shaft) balanced.
- the inside of the oven protruding slag ribs on the hot side are through mechanical postprocessing designed so that the Formation and stable adhesion of a layer solid or doughy stuff on the hot side of the Lighten copper cooling elements.
- the copper cooling elements can be installed close to the construction site cut to the correct length and bent become.
- the individual copper cooling elements through the side webs Sawing, abrasive cutting or burning separated or removed, the remaining circular or non-circular Channel cross-section bent accordingly and through the Corresponding passage opening in the blast furnace tank guided.
- Via intermediate pipe sections for the cooling water flow the cooling elements to the cooling circuit connected to the blast furnace.
- the one in the furnace and outside Duct cross section back to the cold deformation round cross section.
- Cooling elements Holes in the ribs running towards the tank; in these ribs grip attached to the blast furnace shell Support elements; the connection between the ribs and the support elements are made, for example, by inserted secured dowel pins or bolts. After the mechanical assembly takes place in a known manner a backfilling of the Cu cooling elements with a low heat-conductive refractory mass.
- Cooling element does require a slightly larger one Material and manufacturing costs due to the Joining the box profiles and manufacturing the foot and head pieces, but it is even flatter than the Cu cooling elements with the pipe cross section or sections as well as the attached ribs and can therefore be largely adapted to the curvature of the furnace wall.
- the attachment to the furnace wall can be done conventionally Blind holes with threads in the cooling element and through mounting screws going through the furnace done by welded on the outside Cover caps are made gastight.
- Fig. 1 shows a cross section through a cooling element (1) from an extruded or rolled profile section, the inside one or more round or of elongated cooling channels deviating from the circular shape (2) contains.
- the cooling element (1) is provided with lateral webs (3) provided on the of the blast furnace wall (9) opposite side and continuous in the vertical direction Slag ribs (4) arranged. On the the Blast furnace wall (9) facing side is one Fastening rib (5) arranged.
- the cooling element (1) is screwed in by means of bolts (7) Bores (6) of the fastener (8), the Blast furnace wall (9) and the fastening rib (5) attached, the space between the cooling element (1) and blast furnace wall (9) is with a refractory backfill (10) filled out.
- the top and lower webs (3) and the slag ribs (4) run still vertical and formed by recesses (18) each with the next cooling element covering the entire area Connection connection.
- the attachment to the Blast furnace wall (8, 9) is carried out by a bolt (7) through the fastening rib (5) and the fastening element (8) is performed.
- FIG. 3 shows a longitudinal section of the cooling element (1) with the oval cooling duct (2).
- the webs (3) are arranged on both sides of the cooling channel (2).
- the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided on the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided.
- Fig. 4 shows a top view of another alternative Embodiment of a cooling element (1) that a rectangular cooling element (11) with a groove and a rectangular cooling element (13) with spring, in each of which a cooling channel (12) is incorporated.
- the cooling element (1) is by means of fastening elements (14) attached to the blast furnace shell (9). Between Cooling element (1) and blast furnace shell (9) becomes one ff backfill (10) introduced.
- Fig. 5 shows a side view of one another on the Blast furnace armor (9) attached cooling elements (1, 11, 12, 13).
- the cooling element (1) is in each case by a upper lid (15) and a lower lid (17) with Pipe pieces (16) for the coolant supply and removal covered flameproof.
- Fig. 6 shows a longitudinal section through an assembly Cooling element (1) consisting of a rectangular Cooling element (11) with groove, a rectangular cooling element (13) with spring and an upper and lower Lid (15, 17), each with a pipe section (16), and there is a recess (18).
- the cooling water passes through the pipe section (16) in the lower one Cover (17) and leaves it after flowing through the cooling channels (12) via the upper cover (15, 16).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
- Heat Treatment Of Articles (AREA)
- Tunnel Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
Description
Die Erfindung betrifft ein Kühlelement für mit einer feuerfesten Auskleidung versehene Schachtöfen, insbesondere Hochöfen, bestehend aus Kupfer oder einer niedriglegierten Kupferlegierung mit im Inneren angeordneten Kühlmittelkanälen.The invention relates to a cooling element for with a refractory lining shaft furnaces, in particular Blast furnaces consisting of copper or one low-alloy copper alloy with inside arranged coolant channels.
Kühlsysteme für den Panzer von Schachtöfen, insbesondere Hochöfen, sind in "Stahl und Eisen", 106 (1986), Nr. 5, Seiten 205 - 210, ausführlich beschrieben. Neben der Kühlung mit sogenannten Kühlkästen hat sich in den letzten Jahren die Kühlung mit Kühlplatten, sogenannten Staves, aus Gußeisen und Kupfer immer stärker durchgesetzt.Cooling systems for the tank of shaft furnaces, in particular Blast furnaces are in "Stahl und Eisen", 106 (1986), No. 5, pages 205-210, described in detail. In addition to cooling with so-called cooling boxes, in recent years cooling with cooling plates, so-called staves, always made of cast iron and copper enforced more.
Aus der DE 39 25 280 ist eine Kühlplatte aus Grauguß bekannt, bei der die Kühlkanäle durch Kühlrohre gebildet wurden, die in den Gußkörper eingegossen waren. Nachteilig ist hierbei, daß zur Vermeidung der Aufkohlung eine Beschichtung der Kühlrohre erforderlich ist, die den Wärmefluß von der Heißseite der Kühlplatte oder der Staves durch den Stavekörper und die Rohrwand zum Kühlwasser hin behindert. Derartige Staves erreichten daher oft hohe Temperaturen, bei denen ein Perlit-Zerfall eintritt (> 760 °C); es bildeten sich Risse im Gußkörper, und schon nach relativ kurzer Betriebszeit wird der Gußwerkstoff vor den Kühlrohren abgetragen.From DE 39 25 280 is a cooling plate made of gray cast iron known in which the cooling channels through cooling pipes were formed, which were poured into the cast body were. The disadvantage here is that to avoid the Carburizing requires a coating of the cooling pipes which is the heat flow from the hot side of the cooling plate or the staves through the stave body and the pipe wall to the cooling water. Staves like that therefore often reached high temperatures at which a Pearlite decay occurs (> 760 ° C); it formed Cracks in the cast body, and after a relatively short time Operating time is the casting material in front of the cooling pipes worn away.
Es wurde versucht, eine längere Haltbarkeit dieser Gußeisen-Staves dadurch zu erreichen, indem man eine Vielzahl von Kühlrohren eingoß und diese teilweise auch in unterschiedlichen Ebenen parallel zur Heißseite anordnete. Dadurch wurden die Grauguß-Staves zwar sehr viel komplizierter und teurer, ihre Haltbarkeit hat sich jedoch nicht in gleichem Maße erhöht. An attempt was made to extend the shelf life of this To achieve cast iron staves by making a Cast in a variety of cooling tubes and some of them in different levels parallel to the hot side ordered. This made the gray cast iron staves very much much more complicated and expensive, their durability has however, does not increase to the same extent.
Eine wesentliche Verbesserung stellten die sogenannten Kupfer-Staves dar, die aus der DE 29 07 511 bekannt sind und aus gewalztem Kupfermaterial hergestellt sind, wobei die Kühlkanäle durch Tieflochbohrung parallel zur Heißseite eingebracht werden. Hierdurch wird ein ungestörter, durch keine Rohrbeschichtung behinderter Wärmefluß erreicht. Derartige Kupfer-Staves sind an ihrer Heißseite deutlich kälter als Staves aus Grauguß, so daß sich dort - anders als bei Grauguß-Staves - eine stabile Kruste aus Möllermaterial bildet, die als Isolierung wirkt. So kommt es, daß Kupfer-Staves trotz der hohen Wärmeleitfähigkeit dieses Materials aus einem Hochofen weniger Wärme abführen als Grauguß-Staves. Ein weiterer Vorteil der Kupfer-Staves ist es, daß diese konstruktiv dünner (ca. 150 mm) ausgeführt werden können als Grauguß-Staves (ca. 250 mm). Bei einem gegebenen Hochofenprofil erhöht sich das Nutzvolumen bei Verwendung von Kupfer-Staves daher erheblich.The so-called Copper staves are known from DE 29 07 511 and are made from rolled copper material, the cooling channels through deep hole parallel to Hot side. This creates an undisturbed, not impeded by any pipe coating Heat flow reached. Such copper staves are on its hot side much colder than Staves made of gray cast iron, so that - unlike with gray cast iron Staves - there is one stable crust from furniture material that acts as insulation works. It so happens that, despite the high thermal conductivity of this material from one Blast furnace dissipate less heat than gray cast iron staves. Another advantage of the copper staves is that these are structurally thinner (approx. 150 mm) can be cast iron staves (approx. 250 mm). Given a Blast furnace profile increases the usable volume The use of copper staves is therefore considerable.
Der ausschlaggebende Vorteil der Kupfer-Staves gegenüber Staves aus Gußeisen ist jedoch, daß sie aufgrund der Materialeigenschaften keine Rißbildung zeigen und daß ihr Oberflächenverschleiß extrem gering ist. Bei einem über 10 Jahre gehenden Langzeitversuch wurde ein Materialverlust von nur 3 - 4 mm beobachtet. Hieraus ergibt sich bei 50 mm Rippenhöhe eine rechnerische Lebensdauer von rd. 150 Jahren, die weit über der des zugehörigen Hochofens liegt.The decisive advantage of the copper staves over Cast iron staves, however, is because of them the material properties show no cracking and that their surface wear is extremely low. At a long-term trial over 10 years was Material loss of only 3 - 4 mm observed. Out of this arithmetical results at 50 mm rib height Lifespan of approx. 150 years, well above that of the associated blast furnace.
Ein Nachteil der bekannten Kupfer-Staves ist es, daß diese immer noch relativ massiv ausgeführt und damit schwer und teuer sind. Der Bearbeitungsaufwand ist durch die allseitige mechanische Bearbeitung, das Einfräsen von Nuten, das Tieflochbohren sowie durch das Einschweißen der Rohranschlüsse erheblich. Das zerspante Material macht einen erheblichen Teil des Gesamtgewichts aus und wird nur zu deutlich geringerem Preis zurückgenommen. Ein weiterer Nachteil ist, daß beim Tieflochbohren über 2 - 3 m Tiefe bestimmte Kanaldurchmesser nicht unterschritten werden dürfen, da sonst die Gefahr besteht, daß der Bohrer verläuft. Die so entstehenden Kühlkanäle sind größer als erforderlich; das gleiche gilt für die Kühlwassermenge, da eine Mindestgeschwindigkeit von rd. 1,5 m/sec erforderlich ist, um bei hoher thermischer Belastung sich an der Rohrwand evtl. bildende Dampfblasen abzulösen. Somit sind die Kühlwasser-Aufheizraten unwirtschaftlich gering.A disadvantage of the known copper staves is that these are still relatively massive and so are heavy and expensive. The processing effort is due to the all-round mechanical processing, the Milling grooves, deep hole drilling and through that Welding the pipe connections considerably. The Machined material makes up a significant part of the Total weight and only becomes significantly less Price withdrawn. Another disadvantage is that certain channel diameters when drilling deep holes over a depth of 2 - 3 m must not be undercut because otherwise there is a risk that the drill will run. The resulting cooling channels are larger than required; the same applies to the amount of cooling water, since a minimum speed of approx. 1.5 m / sec required is to at high thermal stress to remove any steam bubbles that may be forming on the pipe wall. The cooling water heating rates are therefore uneconomical low.
Aufgabe der Erfindung ist es, im Gegensatz zu den bekannten Kupfer-Staves sowohl den Material- wie auch den Bearbeitungsaufwand erheblich zu senken und dennoch ein stabiles, den rauhen Beanspruchungen im Hochofenbetrieb gewachsenes Kühlelement zu schaffen, das sich mit geringem Montageaufwand montieren läßt und das eine Lebensdauer in mindestens gleicher Größenordnung wie eine Hochofenanlage aufweist.The object of the invention is, in contrast to the well-known copper staves both the material and to reduce the processing effort considerably and still a stable, the rough demands in the blast furnace operation to create grown cooling element that itself can be assembled with little installation effort and one Lifetime in at least the same order of magnitude as has a blast furnace system.
Eine weitere Aufgabe der Erfindung besteht darin, durch geeignete, von der Kreisform abweichende Gestaltung des Strömungsquerschnitts für das Kühlwasser zu höheren Aufheizraten für das Kühlwasser zu gelangen, ohne deshalb die erforderliche Mindestgeschwindigkeit für das Kühlwasser zu unterschreiten, die notwendig ist, um bei hohen thermischen Belastungen an der Rohrwand sich bildende Dampfblasen abzulösen und fortzutransportieren.Another object of the invention is to suitable design of the Flow cross section for the cooling water to higher Heating rates for the cooling water to arrive without therefore the minimum speed required for to fall below the cooling water that is necessary to at high thermal loads on the pipe wall detaching forming vapor bubbles and transporting them away.
Schließlich wird die Heißseite so gestaltet, daß sich mit geringem Aufwand eine Oberfläche ergibt, an der Krusten aus Möllermaterial gut haften können. Finally, the hot side is designed so that with little effort results in a surface on which Crusts from furniture material can adhere well.
Die Lösung der Aufgabe erfolgt in der Weise, wie es in
Anspruch 1 angegeben ist, eine weitere vorteilhafte
Ausgestaltung der Erfindung wird in den zugeordneten
Unteransprüchen 2 - 7 aufgeführt.The task is solved in the way it is in
Eine alternative Lösung der Aufgabe erfolgt in der
Weise, wie es in Anspruch 8 angegeben ist, eine weitere
vorteilhafte Ausgestaltung der Alternative ist in den
zugeordneten Unteransprüchen 9 - 10 aufgeführt.An alternative solution to the problem is the
Way as stated in
Die gestellte Aufgabe nach Anspruch 1 wird im einzelnen
wie folgt gelöst:The task according to
Während ein konventionelles Cu-Kühlelement meist vier parallele Kühlkanäle aufweist, die in einem Kupferblock parallel zur Heißseite verlaufen, besteht ein Kühlelement gemäß der Erfindung aus einer passend gewählten Länge eines stranggepreßten oder gewalzten Cu-Profils, welches einen oder mehrere runde oder von der Kreisform abweichende Kühlkanäle enthält. Durch entsprechende Rippen, die von dem oder den Kühlkanälen ausgehen, wird erreicht, daß das stranggepreßte oder gewalzte Profil sowohl eine ausreichende Steifigkeit mitbringt, durch die es die rauhen Beanspruchungen des Hochofenbetriebes erträgt; dies bezieht sich insbesondere auf den oder die Befestigungsrippen, die am Kühlelement auf der dem Hochofenpanzer zugewandten Seite angeordnet sind. Sie dienen gleichfalls zur Befestigung des Kühlelements am Hochofenpanzer. Die parallel zum Hochofenpanzer liegenden seitlichen Stege der Cu-Kühlelemente sorgen für einen flächendeckenden Schutz des Hochofenpanzers. Ihre Breite wird so festgelegt, daß sie sich mit dem entsprechenden Steg des Nachbarelements überlappen bzw. bündig abschließen. Hierdurch werden auch die Durchmesser- bzw. Umfangsunterschiede in konischen Teilen des Hochofenpanzers (Rast, Schacht) ausgeglichen. Die in das Ofeninnere ragenden Schlackenrippen an der Heißseite werden durch mechanische Nachbearbeitung so gestaltet, daß sie die Bildung und die stabile Haftung einer Schicht aus festen oder teigigen Möllerstoffen an der Heißseite der Cu-Kühlelemente erleichtern.While a conventional Cu cooling element usually has four has parallel cooling channels in a copper block run parallel to the hot side, there is a Cooling element according to the invention from a suitable chosen length of an extruded or rolled Cu profile, which is one or more round or of contains cooling channels deviating from the circular shape. By corresponding fins from the cooling channel or channels going out, it is achieved that the extruded or rolled profile both sufficient rigidity brings with it, through which the rough demands of the Endured blast furnace operation; this applies in particular on the or the fastening ribs on the Cooling element on the side facing the furnace Side are arranged. They also serve for Fastening the cooling element to the blast furnace shell. The Side webs lying parallel to the blast furnace shell of the copper cooling elements ensure a comprehensive coverage Protection of the blast furnace shell. Your width will be like this determined that they are with the appropriate web of the neighboring element overlap or finish flush. This also makes the diameter or circumference differences in conical parts of the blast furnace (Rest, shaft) balanced. The inside of the oven protruding slag ribs on the hot side are through mechanical postprocessing designed so that the Formation and stable adhesion of a layer solid or doughy stuff on the hot side of the Lighten copper cooling elements.
Die Cu-Kühlelemente können montagenah auf der Baustelle auf die richtige Länge zugeschnitten und gebogen werden. Hierzu werden an den Ober- und Unterseiten der einzelnen Cu-Kühlelemente die seitlichen Stege durch Sägen, Trennschleifen oder Brennen getrennt bzw. entfernt, der verbleibende kreis- oder nicht-kreisförmige Kanalquerschnitt entsprechend umgebogen und durch die entsprechende Durchtrittsöffnung im Hochofenanzer geführt. Über Zwischenrohrstücke für den Kühlwasserdurchfluß werden die Kühlelemente an den Kühlkreislauf des Hochofens angeschlossen. Hierbei kann, um zu möglichst kleinen Durchmessern der Panzeröffnungen zu kommen, der im Hochofenpanzer und außerhalb liegende Kanalquerschnitt durch Kaltverformung wieder auf den runden Querschnitt gebracht werden. Zur Befestigung der Kühlelemente am Panzer erhalten die Kühlelemente Bohrungen in den zum Panzer hin verlaufenden Rippen; in diese Rippen greifen am Hochofenpanzer befestigte Tragelemente ein; die Verbindung zwischen den Rippen und den Tragelementen erfolgt beispielsweise durch eingeschobene gesicherte Paßstifte bzw. Bolzen. Nach der mechanischen Montage erfolgt in bekannter Weise eine Hinterfüllung der Cu-Kühlelemente mit einer niedrig wärmeleitfähigen Feuerfest-Masse.The copper cooling elements can be installed close to the construction site cut to the correct length and bent become. For this purpose, on the top and bottom sides of the individual copper cooling elements through the side webs Sawing, abrasive cutting or burning separated or removed, the remaining circular or non-circular Channel cross-section bent accordingly and through the Corresponding passage opening in the blast furnace tank guided. Via intermediate pipe sections for the cooling water flow the cooling elements to the cooling circuit connected to the blast furnace. Here, in order to the smallest possible diameter of the tank openings come, the one in the furnace and outside Duct cross section back to the cold deformation round cross section. To attach the Cooling elements on the tank receive the cooling elements Holes in the ribs running towards the tank; in these ribs grip attached to the blast furnace shell Support elements; the connection between the ribs and the support elements are made, for example, by inserted secured dowel pins or bolts. After the mechanical assembly takes place in a known manner a backfilling of the Cu cooling elements with a low heat-conductive refractory mass.
In einer alternativen Ausgestaltung der Erfindung werden ebenfalls gewalzte oder stranggepreßte Kupferprofile verwendet, wobei diese rechteckig gestaltet sind und an den Seiten eine Nut und Feder für eine ineinander greifende Verbindung der Kühlelemente aufweisen.In an alternative embodiment of the invention are also rolled or extruded copper profiles used, these designed rectangular are and on the sides a tongue and groove for one interlocking connection of the cooling elements exhibit.
Durch das Aneinanderfügen mehrerer solcher Elemente wird ein zusammenhängender Kupferblock mit darin liegenden, rechteckigen Kühlkanälen gebildet. Durch diese Ausführung der Kühlelementseiten wird ein nahtloser Übergang der einzelnen Bauteile erreicht, der zum Ausgleich der Konizität im Hochofenschacht und der Hochofenrast herangezogen wird. Somit ist an allen Stellen ein fugenloser Hitzeschutz des Hochofenpanzers gewährleistet.By joining several such elements together becomes a coherent copper block with it lying, rectangular cooling channels formed. By this version of the cooling element sides becomes a seamless transition of the individual components achieved, to compensate for the taper in the blast furnace shaft and the blast furnace rest is used. So is at all Provide seamless heat protection of the blast furnace shell guaranteed.
An den Kopfenden der Kühlelemente werden ähnliche stranggepreßte Profile in U-Form, jedoch mit einem größeren Kühlkanalquerschnitt, vorgesetzt. Der Einund Austritt des Kühlwassers erfolgt dann über ein Rohrstück jeweils am Ober- und Unterteil des zusammengesetzten Kühlelements. Ein derartig hergestelltes Kühlelement erfordert zwar einen etwas größeren Material- und Fertigungsaufwand, bedingt durch das Aneinanderfügen der Kastenprofile sowie das Herstellen der Fuß- und Kopfstücke, es ist jedoch noch flacher als die Cu-Kühlelemente mit dem oder den Rohrquerschnitten sowie den angesetzten Rippen gestaltet und kann daher weitgehend der Krümmung der Ofenwand angepaßt werden. Die Befestigung an der Ofenwand kann konventionell über Sackbohrungen mit Gewinde im Kühlelement sowie durch den Ofenpanzer hindurchgehende Befestigungsschrauben erfolgen, die an der Außenseite durch aufgeschweißte Abdeckkappen gasdicht gemacht werden.At the head ends of the cooling elements are similar extruded U-shaped profiles, but with one larger cooling channel cross section, provided. The one and only The cooling water then exits via Pipe piece on the upper and lower part of the composite Cooling element. One made in this way Cooling element does require a slightly larger one Material and manufacturing costs due to the Joining the box profiles and manufacturing the foot and head pieces, but it is even flatter than the Cu cooling elements with the pipe cross section or sections as well as the attached ribs and can therefore be largely adapted to the curvature of the furnace wall. The attachment to the furnace wall can be done conventionally Blind holes with threads in the cooling element and through mounting screws going through the furnace done by welded on the outside Cover caps are made gastight.
Die Erfindung wird anhand von schematischen Ausführungszeichnungen näher erläutert. The invention is based on schematic Execution drawings explained in more detail.
Es zeigen:
- Fig. 1
- einen Querschnitt durch ein Cu-Kühlelement mit Schlackenrippen,
- Fig. 2
- eine Seitenansicht eines Cu-Kühlelements mit Schlackenrippen,
- Fig. 3
- ein Längsschnitt eines Cu-Kühlelements mit Schlackenrippen,
- Fig. 4
- einen Querschnitt durch ein Cu-Kühlelement aus rechteckigen Profilen,
- Fig. 5
- eine Seitenansicht von übereinander angeordneten Cu-Kühlelementen aus rechteckigen Profilen,
- Fig. 6
- einen Längsschnitt eines Cu-Kühlelements aus rechteckigen Profilen,
- Fig. 7
- eine Draufsicht auf den oberen Deckel des Cu-Kühlelements aus rechteckigen Profilen,
- Fig. 8
- eine Draufsicht auf den unteren Deckel des Cu-Kühlelements aus rechteckigen Profilen.
- Fig. 1
- a cross section through a copper cooling element with slag fins,
- Fig. 2
- a side view of a copper cooling element with slag fins,
- Fig. 3
- a longitudinal section of a copper cooling element with slag fins,
- Fig. 4
- a cross section through a Cu cooling element made of rectangular profiles,
- Fig. 5
- 1 shows a side view of Cu cooling elements made of rectangular profiles arranged one above the other,
- Fig. 6
- a longitudinal section of a Cu cooling element made of rectangular profiles,
- Fig. 7
- a plan view of the upper cover of the Cu cooling element made of rectangular profiles,
- Fig. 8
- a plan view of the lower cover of the Cu cooling element made of rectangular profiles.
Fig. 1 zeigt einen Querschnitt durch ein Kühlelement (1) aus einem stranggepreßten oder gewalzten Profilabschnitt, das im Inneren ein oder mehrere runde oder von der Kreisform abweichende länglich geformte Kühlkanäle (2) enthält.Fig. 1 shows a cross section through a cooling element (1) from an extruded or rolled profile section, the inside one or more round or of elongated cooling channels deviating from the circular shape (2) contains.
Das Kühlelement (1) ist mit seitlichen Stegen (3) versehen, auf der auf der von der Hochofenwand (9) abgewandten Seite und in vertikaler Richtung durchlaufenden Schlackenrippen (4) angeordnet. Auf der der Hochofenwand (9) zugewandten Seite ist eine Befestigungsrippe (5) angeordnet.The cooling element (1) is provided with lateral webs (3) provided on the of the blast furnace wall (9) opposite side and continuous in the vertical direction Slag ribs (4) arranged. On the the Blast furnace wall (9) facing side is one Fastening rib (5) arranged.
Das Kühlelement (1) wird mittels Bolzen (7) in Bohrungen (6) des Befestigungselements (8), der Hochofenwand (9) und der Befestigungsrippe (5) befestigt, der Zwischenraum zwischen Kühlelement (1) und Hochofenwand (9) ist mit einer feuerfesten Hinterfüllung (10) ausgefüllt.The cooling element (1) is screwed in by means of bolts (7) Bores (6) of the fastener (8), the Blast furnace wall (9) and the fastening rib (5) attached, the space between the cooling element (1) and blast furnace wall (9) is with a refractory backfill (10) filled out.
Entsprechend Fig. 2 sind die oberen und unteren Enden des Kühlelements (1) mit dem Kühlkanal (2) in Richtung Hochofenwand (9) um 90° gebogen und durch Öffnungen (19) der Hochofenwand (9) geführt. Die oberen und unteren Stege (3) und die Schlackenrippen (4) verlaufen weiterhin vertikal und bilden durch Aussparungen (18) jeweils mit dem nächsten Kühlelement eine flächendeckende Anschlußverbindung. Die Befestigung an der Hochofenwand (8, 9) erfolgt durch einen Bolzen (7), der durch die Befestigungsrippe (5) und das Befestigungselement (8) geführt ist.2 are the upper and lower ends of the cooling element (1) with the cooling channel (2) in the direction Blast furnace wall (9) bent through 90 ° and through openings (19) of the blast furnace wall (9). The top and lower webs (3) and the slag ribs (4) run still vertical and formed by recesses (18) each with the next cooling element covering the entire area Connection connection. The attachment to the Blast furnace wall (8, 9) is carried out by a bolt (7) through the fastening rib (5) and the fastening element (8) is performed.
Fig. 3 zeigt einen Längsschnitt des Kühlelements (1) mit dem ovalen Kühlkanal (2). Beidseitig des Kühlkanals (2) sind die Stege (3) angeordnet. Auf der dem Befestigungselement (8) der Hochofenwand (9) zugewandten Seite ist eine längliche Befestigungsrippe (5) vorgesehen. 3 shows a longitudinal section of the cooling element (1) with the oval cooling duct (2). On both sides of the cooling channel (2) the webs (3) are arranged. On the the fastener (8) the side of the blast furnace wall (9) an elongated fastening rib (5) is provided.
Durch eine Bohrung (6) in (5) und (8) wird ein Bolzen (7) geschoben, um das Kühlelement an der Hochofenwand zu befestigen.Through a hole (6) in (5) and (8) is a bolt (7) pushed around the cooling element on the furnace wall to fix.
Fig. 4 zeigt eine Draufsicht auf eine weitere, alternative Ausführungsform eines Kühlelements (1), das aus einem rechteckigen Kühlelement (11) mit Nut sowie aus einem rechteckigen Kühlelement (13) mit Feder besteht, in die jeweils ein Kühlkanal (12) eingearbeitet ist.Fig. 4 shows a top view of another alternative Embodiment of a cooling element (1) that a rectangular cooling element (11) with a groove and a rectangular cooling element (13) with spring, in each of which a cooling channel (12) is incorporated.
Das Kühlelement (1) wird mittels Befestigungselementen (14) an den Hochofenpanzer (9) befestigt. Zwischen Kühlelement (1) und Hochofenpanzer (9) wird eine ff-Hinterfüllung (10) eingebracht.The cooling element (1) is by means of fastening elements (14) attached to the blast furnace shell (9). Between Cooling element (1) and blast furnace shell (9) becomes one ff backfill (10) introduced.
Fig. 5 zeigt eine Seitenansicht von übereinander an dem Hochofenpanzer (9) befestigten Kühlelementen (1, 11, 12, 13). Das Kühlelement (1) wird jeweils durch einen oberen Deckel (15) und einen unteren Deckel (17) mit Rohrstücken (16) für die Kühlmittelzu- bzw. -Abfuhr druckfest abgedeckt.Fig. 5 shows a side view of one another on the Blast furnace armor (9) attached cooling elements (1, 11, 12, 13). The cooling element (1) is in each case by a upper lid (15) and a lower lid (17) with Pipe pieces (16) for the coolant supply and removal covered flameproof.
Durch versetzt angeordnete Aussparungen (18) in den Deckel (15, 17) wird eine überlappende Verlegung der Kühlelemente (1) am Hochofenpanzer (9) erreicht.Through offset recesses (18) in the Cover (15, 17) is an overlapping laying of Cooling elements (1) on the blast furnace shell (9) reached.
Fig. 6 zeigt einen Längsschnitt durch ein montagegerechtes Kühlelement (1), das aus einem rechteckigen Kühlelement (11) mit Nut, einem rechteckigen Kühlelement (13) mit Feder sowie einem oberen und unteren Deckel (15, 17), jeweils mit einem Rohrstück (16), und einer Aussparung (18) besteht.Fig. 6 shows a longitudinal section through an assembly Cooling element (1) consisting of a rectangular Cooling element (11) with groove, a rectangular cooling element (13) with spring and an upper and lower Lid (15, 17), each with a pipe section (16), and there is a recess (18).
Das Kühlwasser tritt über das Rohrstück (16) im unteren Deckel (17) ein und verläßt dieses nach Durchströmen der Kühlkanäle (12) über den oberen Deckel (15, 16). The cooling water passes through the pipe section (16) in the lower one Cover (17) and leaves it after flowing through the cooling channels (12) via the upper cover (15, 16).
Fig. 7 und 8 zeigen jeweils eine Draufsicht auf den oberen Deckel (15) sowie den unteren Deckel (17) mit den Rohrstücken (16) und Segmenten des Kühlelements (11) mit Nut und (13) mit Feder einschließlich der beiden Kühlkanäle (12). 7 and 8 each show a top view of the upper lid (15) and the lower lid (17) with the pipe sections (16) and segments of the cooling element (11) with groove and (13) with tongue including the two cooling channels (12).
- 11
- KühlelementCooling element
- 22nd
- ovaler Kühlkanaloval cooling channel
- 33rd
- seitliche Stegeside bars
- 44th
- SchlackenrippenSlag ribs
- 55
- BefestigungsrippenMounting ribs
- 66
- Bohrung in 5 und 8Hole in 5 and 8
- 77
- Bolzenbolt
- 88th
- BefestigungselementFastener
- 99
- HochofenpanzerBlast furnace tanks
- 1010th
- feuerfeste Hinterfüllungfireproof backfill
- 1111
- Kühlelement, rechteckig mit NutCooling element, rectangular with groove
- 1212th
- KühlkanalCooling channel
- 1313
- Kühlelement, rechteckig mit FederCooling element, rectangular with spring
- 1414
- BefestigungselementFastener
- 1515
- oberer Deckelupper lid
- 1616
- RohrstückePipe pieces
- 1717th
- unterer Deckellower lid
- 1818th
- Nut/AussparungGroove / recess
- 1919th
- Öffnungen in 9Openings in 9
Claims (10)
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
daß das Kühlelement (1) auf der von der Hochofenwand (9) abgewandten Seite in vertikaler Richtung mit zwei oder einer Vielzahl parallel verlaufender Schlackenrippen (4) ausgerüstet ist.Cooling element according to claim 1,
characterized,
that the cooling element (1) on the side facing away from the blast furnace wall (9) is equipped in the vertical direction with two or a plurality of parallel slag fins (4).
dadurch gekennzeichnet,
daß in die Befestigungsrippe (5) mindestens eine Bohrung (6) eingebracht ist.Cooling element according to claim 1,
characterized,
that at least one bore (6) is made in the fastening rib (5).
dadurch gekennzeichnet,
daß in die Stege (3) eine Aussparung (18) eingearbeitet ist.Cooling element according to claim 1,
characterized,
that a recess (18) is incorporated in the webs (3).
dadurch gekennzeichnet,
daß die Befestigungsrippen (5) der Kühlelemente (1) an Befestigungselementen (8) der Hochofenwand (9) mittels Bolzen (7) angebracht und die Stege (3) in der Aussparung (18) der Kühlelemente (1) überlappend angeordnet werden.Cooling element according to claims 1-6,
characterized,
that the fastening ribs (5) of the cooling elements (1) are attached to fastening elements (8) of the furnace wall (9) by means of bolts (7) and the webs (3) in the recess (18) of the cooling elements (1) are arranged to overlap.
dadurch gekennzeichnet,
daß die Befestigungsrippen (5) der Kühlelemente (1) an Befestigungselementen (8) der Hochofenwand (9) mittels Bolzen (7) angebracht und die Stege (3) der Kühlelemente (1) bündig angeordnet werden. Cooling element according to claims 1-5,
characterized,
that the fastening ribs (5) of the cooling elements (1) are attached to fastening elements (8) of the furnace wall (9) by means of bolts (7) and the webs (3) of the cooling elements (1) are arranged flush.
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
daß das Kühlelement (1) mittels Befestigungselementen (14) am Hochofenpanzer (9) befestigt wird.Cooling element according to claim 9,
characterized,
that the cooling element (1) is fastened to the blast furnace shell (9) by means of fastening elements (14).
dadurch gekennzeichnet,
daß der obere Deckel (15) und der untere Deckel (17) mit je einer Aussparung (18) versehen ist.Cooling element according to claim 9,
characterized,
that the upper cover (15) and the lower cover (17) are each provided with a recess (18).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19751356 | 1997-11-20 | ||
| DE19751356A DE19751356C2 (en) | 1997-11-20 | 1997-11-20 | Cooling elements for shaft furnaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0918092A1 true EP0918092A1 (en) | 1999-05-26 |
| EP0918092B1 EP0918092B1 (en) | 2003-07-09 |
Family
ID=7849253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98121263A Expired - Lifetime EP0918092B1 (en) | 1997-11-20 | 1998-11-07 | Cooling devices for shaft furnace |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US6257326B1 (en) |
| EP (1) | EP0918092B1 (en) |
| JP (1) | JPH11217609A (en) |
| KR (1) | KR19990045327A (en) |
| CN (1) | CN1080314C (en) |
| AT (1) | ATE244772T1 (en) |
| AU (1) | AU753713B2 (en) |
| BR (1) | BR9804728A (en) |
| CA (1) | CA2254281A1 (en) |
| DE (2) | DE19751356C2 (en) |
| ES (1) | ES2203870T3 (en) |
| RU (1) | RU2210705C2 (en) |
| TW (1) | TW410266B (en) |
| UA (1) | UA49885C2 (en) |
| ZA (1) | ZA9810483B (en) |
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| DE10061359A1 (en) * | 2000-12-09 | 2002-06-27 | Didier M & P Energietechnik Gm | Cooling device for shaft furnaces and shaft furnaces equipped with such a cooling device |
| WO2013135221A1 (en) * | 2012-03-13 | 2013-09-19 | Kme Germany Gmbh & Co. Kg | Cooling element for a melting furnace |
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| EP1183396B1 (en) * | 1999-04-09 | 2003-12-03 | SMS Demag Aktiengesellschaft | Stave for cool shaft kilns |
| KR100815808B1 (en) * | 2001-12-26 | 2008-03-20 | 주식회사 포스코 | Dual structure stave chiller of blast furnace |
| MX2008005528A (en) * | 2005-11-01 | 2008-11-13 | Amerifab Inc | Heat exchange apparatus and method of use. |
| JP4498410B2 (en) * | 2007-12-28 | 2010-07-07 | パンパシフィック・カッパー株式会社 | Water-cooled jacket structure for inspection hole of flash furnace |
| LU91454B1 (en) * | 2008-06-06 | 2009-12-07 | Wurth Paul Sa | Cooling plate for a metallurgical furnace |
| LU91455B1 (en) * | 2008-06-06 | 2009-12-07 | Wurth Paul Sa | Gap-filler insert for use with cooling plates for a metallurgical furnace |
| RU2487946C2 (en) * | 2008-12-29 | 2013-07-20 | Лувата Эспоо Ой | Method of making cooling element for pyrometallurgical reactor and cooling element |
| ITRM20110448A1 (en) * | 2011-08-25 | 2013-02-26 | I R C A S P A Ind Resistenz E Corazzate E | TUBULAR PROFILE FOR BIPHASIC RADIATOR AND ITS BIPHASIC RADIATOR |
| WO2020144802A1 (en) * | 2019-01-10 | 2020-07-16 | 三菱重工エンジン＆ターボチャージャ株式会社 | Motor, and inverter-integrated rotating electric machine |
| FR3105649B1 (en) * | 2019-12-19 | 2021-11-26 | Valeo Equip Electr Moteur | Cooled rotating electric machine |
| JP7509048B2 (en) * | 2021-02-02 | 2024-07-02 | トヨタ自動車株式会社 | Electric vehicles |
| CZ310117B6 (en) * | 2021-03-05 | 2024-08-28 | Inteco Pti S.R.O. | An equipment for the cooling of metallurgical equipment |
| CN117587178A (en) * | 2023-11-27 | 2024-02-23 | 秦冶工程技术(北京)有限责任公司 | Blast furnace cooling wall |
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| DE4446542A1 (en) * | 1994-12-24 | 1996-06-27 | Abb Management Ag | Furnace vessel for a direct current arc furnace |
| EP0741190A1 (en) * | 1995-05-05 | 1996-11-06 | MAN Gutehoffnungshütte Aktiengesellschaft | Cooling plates for shaft furnaces |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10061359A1 (en) * | 2000-12-09 | 2002-06-27 | Didier M & P Energietechnik Gm | Cooling device for shaft furnaces and shaft furnaces equipped with such a cooling device |
| DE10061359C2 (en) * | 2000-12-09 | 2003-01-02 | Didier M & P Energietechnik Gm | Cooling device for shaft furnaces |
| WO2013135221A1 (en) * | 2012-03-13 | 2013-09-19 | Kme Germany Gmbh & Co. Kg | Cooling element for a melting furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9804728A (en) | 1999-12-14 |
| CN1225395A (en) | 1999-08-11 |
| ES2203870T3 (en) | 2004-04-16 |
| KR19990045327A (en) | 1999-06-25 |
| JPH11217609A (en) | 1999-08-10 |
| US6257326B1 (en) | 2001-07-10 |
| ZA9810483B (en) | 1999-04-07 |
| AU753713B2 (en) | 2002-10-24 |
| EP0918092B1 (en) | 2003-07-09 |
| RU2210705C2 (en) | 2003-08-20 |
| ATE244772T1 (en) | 2003-07-15 |
| CA2254281A1 (en) | 1999-05-20 |
| DE59808968D1 (en) | 2003-08-14 |
| AU9243498A (en) | 1999-06-10 |
| UA49885C2 (en) | 2002-10-15 |
| DE19751356A1 (en) | 1999-06-10 |
| DE19751356C2 (en) | 2002-04-11 |
| CN1080314C (en) | 2002-03-06 |
| TW410266B (en) | 2000-11-01 |
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