EP1054068B1 - Verfahren und Vorrichtung zum Verschliessen und Öffnen eines Stichloches eines kippbaren metallurgischen Gefässes - Google Patents
Verfahren und Vorrichtung zum Verschliessen und Öffnen eines Stichloches eines kippbaren metallurgischen Gefässes Download PDFInfo
- Publication number
- EP1054068B1 EP1054068B1 EP20000108442 EP00108442A EP1054068B1 EP 1054068 B1 EP1054068 B1 EP 1054068B1 EP 20000108442 EP20000108442 EP 20000108442 EP 00108442 A EP00108442 A EP 00108442A EP 1054068 B1 EP1054068 B1 EP 1054068B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metallurgical vessel
- slag
- closure
- closure device
- tap hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- F27D19/00—Arrangements of controlling devices
-
- 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
-
- 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
- C21C5/4673—Measuring and sampling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
- F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
-
- 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
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0021—Devices for monitoring linings for wear
-
- 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
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0028—Devices for monitoring the level of the melt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
Definitions
- the invention relates to a method for closing and opening a tap hole tiltable metallurgical vessel, in particular a steelworks converter, the Tap hole by means of a closure device with a closure body which is from a Waiting position can be brought into a closed position and back, can be locked, and an apparatus for performing the method.
- Oxygen-blowing steelwork converters have for the purpose of parting off the steel bath its own tap hole, which is located far below the mouth of the converter.
- tap hole which is located far below the mouth of the converter.
- Amount of slag - called slag - is carried away, in the end, if the converter is empty of steel, the tail slag until the converter is tipped back.
- Oxidation reactions make unwanted pig iron into steel
- elements of the iron smelter are bound to oxygen and the formed oxides released in gaseous form or transferred into the slag.
- After freshening up elements often have to be added to the steel for deoxidation and alloying purposes that have a higher affinity for oxygen than that in the slag tied unwanted accompanying elements.
- the consequence of this is that such Alloy elements reduce the unwanted accompanying elements from the slag can, slagging themselves.
- Fresh slag can also be very aggressive compared to the refractory material of the melting pot and ladle. Out For reasons of quality and for reasons of economy, one strives to: Tapping and alloying a melt in the pan, as far as possible with the slag to prevent.
- the closure body leaves an annular gap with respect to the wall of the tap hole free, through the air into the interior of the metallurgical vessel due to the through the Sealing body supplied compressed gas, which is blown into the tap hole, sucked becomes. This prevents the melt from flowing out inside the vessel the tap hole is completely sealed pneumatically.
- a facility of this kind you can about 50% of the total slag is retained in the converter. 20% of Total slag flows as first or preliminary slag. 30% of the total slag result from the idling slag - called vortex - that runs along with the tapping and through no facility can be influenced.
- the jet itself is caused by the compressed gas initially held back. As a result, it comes from a certain bath level above the tap hole due to the increasing pressure of the steel bath suddenly one This increasingly unstable condition topples over until there is a surge of steel fluid pours into the tap hole.
- the signal receiver will then respond, but it is not closed prevent part of this amount from pouring out before the closure body from the tap hole.
- Steel is already flowing before the tap hole is fully opened through the tap hole on the closure body.
- the amount of steel flowing out is in of the order of 120 to 250 kg steel and depends on the taphole condition. This Quantity pours over the closure device, which places an extraordinary burden on it and is bearded.
- the invention aims to avoid the disadvantages and difficulties of the prior art Technology and set themselves the task, a method and an implementation facility to create the method, which is a tapping with significantly reduced Allow slag discharge and by which a danger of fermentation is essential is reduced.
- This object is achieved according to the invention in a method of the type described in the introduction solved in that the activation of the closure device depending on the amount of Metal and / or slag bath level of the metal contained in the metallurgical vessel or slag melt and depending on the tilt angle and the internal volume of the metallurgical vessel is carried out.
- the filling weight of the metallurgical vessel or the filling amount to know the metallurgical vessel with molten metal and slag since that Internal volume of the vessel is known.
- the burnout is for the internal volume refractory lining of the metallurgical vessel. It has in the Practice has shown that the level of the metal and slag bath level to a large extent from Burnout of the refractory lining of the metallurgical vessel is dependent, etc. also then when it's tipped. For the steelworker, taking the Burnout no effort, especially since the increase in burnout from batch to batch the steelworker is familiar with himself.
- a preferred procedure is characterized in that when the metallurgical vessel first the tap hole by means of the closure device just before Drainage of a slag melt is closed that when the open the taphole just before the molten metal runs out and that the tap hole is closed again at the tapping end of the molten metal becomes.
- the time period for the movement is advantageous the locking device from the waiting position to the closed position and vice versa the closed position into the waiting position.
- a preferred embodiment is characterized by a regulating or control unit, into which the internal volume of the metallurgical vessel and the filling quantities of metal and Data relating to slag can be entered.
- FIG. 1 is an overall side view of a Steel plant converter trained metallurgical vessel and FIGS. 2 and 3 each illustrate a section through a steelworks converter on an enlarged scale, u.zw. Fig. 2 through a freshly delivered steel mill converter and Fig. 3 is a section through a steel mill converter with severe burnout, i.e. relatively close to one Neuausmautation.
- the steelworks converter 1 shown in FIG. 1 has a refractory inside Lining 2 provided steel jacket 3, which is mounted in a support ring 4. This is with diametrically opposite trunnions 5 supported on the foundation 6 Converter bearings 7 mounted, one of the trunnions 5 with the large one Converter tilt drive gear 8 is provided.
- the steelworks converter 1 serve schematically illustrated drive motors 9.
- the Steelworks converter equipped with a tilt measuring device 10 which e.g. on the trunnion 5 or on the transmission 8 is provided.
- a pinhole 13 is arranged in the center between the pivot pin 5 in the center of rotation 12 a closure device 14 can be closed.
- a closure body 15 is below Release of an annular gap 16 between the closure body 15 and the inner wall 17th the tap hole 13 from a waiting position I into a tap hole 13 concealing Locking position II and movable back, as for example in AT 350 090 B. is described.
- Metal melt 19 and / or slag melt 20 can be introduced, whereby the metal melt 19 or the slag melt 20 can be retained in the steelwork converter 1.
- An actuating device for example, is used to move the closure body 15 a pressure medium cylinder 21, which is supplied with pressure medium via lines 22, 23.
- Control valves 24, 25, 26 are installed in each of the pressure medium lines 18, 22, 23.
- the actuating device 21 for the closure device 14 with the Tilt measuring device 10 coupled, etc. such that when the steel mill converter is tilted 1 initially just before reaching the tap hole 13 through the slag melt 20 Tap hole 13 is closed by means of the closure device 14 and when tilting further of the steelworks converter 1 just before the tap hole 13 is reached by molten steel 19 is opened. At the tapping end of the molten metal, the tap hole 13 is again locked.
- the steelworks converter 1 has to be tilted by the angle ⁇ 1 '> ⁇ 1 or ⁇ 2 '> ⁇ 2 so that the slag melt 20 or the metal melt 19 each reach the decanting point 27.
- the coupling of the tilt angle ⁇ with the actuator 21 for the Closure body 15 is realized via a regulating or control unit 33, in which the Internal volume of the steelworks converter 1, i.e. the fire of the refractory lining 2, and the fill quantities of molten steel and slag can be entered.
- the valves 24, 25 and 26 depending on the in the regulating or control unit 33 entered data relating to the tilt angle, internal volume and filling quantity actuated, so that the closure device at the right time while avoiding unwanted leakage of slag melt 20 or Minimization of slag melt leakage during metal tapping, i.e. Stahlabstich, is operated.
- the invention is not limited to the illustrated embodiment, but can be modified in various ways.
- a suitable Signal sensor to determine a difference between through the tap hole 13 emerging steel melt 19 and slag melt 20 to observe, and so on electrical and / or electromagnetic path another criterion for activation to have the closure device 14 available.
- To design taphole closure device 14 in a different way for example by the Closure body 15 with directions of movement lying in different surfaces the waiting position I is moved to the closed position II and back, thereby the Residence time of the closure body 15 in the immediate vicinity of the through the tap hole 13th emerging beam and in the beam is greatly reduced.
- the invention can be used for different tiltable metallurgical vessels with a tap hole deploy; however, the main area of application is steel mill converters.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
Description
Fig. 2 - neu ausgemauerter Stahlwerkskonverter 1:
- α1' = Kippwinkel des Stahlwerkskonverters 1, bei dem der Schlackenbadspiegel 31 den Dekantierpunkt 27 erreicht,
- α2' = Kippwinkel des Stahlwerkskonverters 1, bei dem der Stahlbadspiegel 32 den Dekantierpunkt 27 erreicht.
Claims (8)
- Verfahren zum Verschließen und Öffnen eines Stichloches (13) eines kippbaren metallurgischen Gefäßes (1), insbesondere eines Stahlwerkskonverters (1), wobei das Stichloch (13) mittels einer Verschlußeinrichtung (14) mit einem Verschlußkörper (15), der von einer Warteposition (I) in eine Schließposition (II) und retour gebracht werden kann, verschließbar ist, dadurch gekennzeichnet, daß die Aktivierung der Verschlußeinrichtung (14) in Abhängigkeit der Höhe (30, 29) des Metall- und/oder Schlackenbadspiegels (32, 31) der im metallurgischen Gefäß enthaltenen Metall- bzw. Schlackenschmelze (19, 20) sowie in Abhängigkeit des Kippwinkels (α1, α2) und des Innenvolumens des metallurgischen Gefäßes (1) durchgeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für die Bestimmung der Höhe (30, 29) des Metall- und/oder Schlackenbadspiegels (32, 31) das Füllgewicht des metallurgischen Gefäßes (1) herangezogen wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß für die Aktivierung der Verschlußeinrichtung (14) die Füllmenge des metallurgischen Gefäßes (1) mit Metallund Schlackenschmelze (19, 20) berücksichtigt wird.
- Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß für die Aktivierung der Verschlußeinrichtung (14) der Ausbrand der feuerfesten Auskleidung (2) des metallurgischen Gefäßes (1) berücksichtigt wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß beim Kippen des metallurgischen Gefäßes (1) zunächst das Stichloch (13) mittels der Verschlußeinrichtung (14) knapp vor Ausrinnen einer Schlackenschmelze (20) verschlossen wird, daß beim Weiterkippen des metallurgischen Gefäßes (1) knapp vor Ausrinnen von Metallschmelze (19) das Stichloch (13) geöffnet wird, und daß beim Abstichende der Metallschmelze (19) das Stichloch (13) wiederum verschlossen wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß beim Aktivieren der Verschlußeinrichtung (14) die Zeitdauer für die Bewegung der Verschlußeinrichtung (14) von der Warteposition (I) in die Schließposition (II) bzw. umgekehrt von der Schließposition (II) in die Warteposition (1) berücksichtigt wird.
- Vorrichtung zum Verschließen und Öffnen eines Stichloches eines kippbaren metallurgischen Gefäßes (1), insbesondere eines Stahlwerkskonverters (1), mit einer mit einer Betätigungseinrichtung (21) betätigbaren Verschlußeinrichtung (14), die aus einer Warteposition (I), bei der das Stichloch (13) geöffnet ist, in eine Schließposition (II), in der das Stichloch (13) verschlossen ist, und retour bewegbar ist, dadurch gekennzeichnet, daß das metallurgische Gefäß (1) mit einer Kippmeßeinrichtung (10) ausgestattet ist, und die Betätigungseinrichtung (21) für die Verschlußeinrichtung (14) mit der Kippmeßeinrichtung (10) gekoppelt ist.
- Vorrichtung nach Anspruch 7, gekennzeichnet durch eine Regel- oder Steuereinheit (33), in die das Innenvolumen des metallurgischen Gefäßes (1) und die Füllmengen von Metall und Schlacke betreffende Daten eingebbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90999A AT407056B (de) | 1999-05-21 | 1999-05-21 | Verfahren zum verschliessen und öffnen eines stichloches eines kippbaren metallurgischen gefässes |
AT90999 | 1999-05-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1054068A2 EP1054068A2 (de) | 2000-11-22 |
EP1054068A3 EP1054068A3 (de) | 2001-03-21 |
EP1054068B1 true EP1054068B1 (de) | 2004-10-06 |
Family
ID=3502637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000108442 Expired - Lifetime EP1054068B1 (de) | 1999-05-21 | 2000-04-18 | Verfahren und Vorrichtung zum Verschliessen und Öffnen eines Stichloches eines kippbaren metallurgischen Gefässes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1054068B1 (de) |
AT (1) | AT407056B (de) |
DE (1) | DE50008057D1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111809015B (zh) * | 2020-06-09 | 2021-09-28 | 中冶南方工程技术有限公司 | 基于转炉容积模型的转炉自动出钢方法及转炉系统 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5739112A (en) * | 1980-08-22 | 1982-03-04 | Kawasaki Steel Corp | Controlling method for inclination angle of converter |
JPS57147251U (de) * | 1981-03-10 | 1982-09-16 | ||
US5203909A (en) * | 1991-10-15 | 1993-04-20 | Ltv Steel Company, Inc. | Method and apparatus for slag free casting |
-
1999
- 1999-05-21 AT AT90999A patent/AT407056B/de not_active IP Right Cessation
-
2000
- 2000-04-18 EP EP20000108442 patent/EP1054068B1/de not_active Expired - Lifetime
- 2000-04-18 DE DE50008057T patent/DE50008057D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATA90999A (de) | 2000-04-15 |
AT407056B (de) | 2000-12-27 |
DE50008057D1 (de) | 2004-11-11 |
EP1054068A3 (de) | 2001-03-21 |
EP1054068A2 (de) | 2000-11-22 |
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