VERFAHREN ZUM ELEKTROSCHLACKE UMSCHMELZEN VON METALLEN

WASSERGEKÜHLTER DECKEL FÜR EIN FEUERFEST ZUGESTELLTES BEHANDLUNGSGEFÄSS FÜR METALLSCHMELZEN

A water-cooled cover for a treatment vessel for metal melts, wherein the preferably refractorily lined treatment vessel serves in particular for the treatment of liquid metal, in particular of steel, by blowing in solids or gases, or inductive stirring at atmosphere or in vacuum. The cover is formed dome-like, wherein the ratio of inner clear height (h) to inner clear diameter (D) of a flange of the cover is at least 0.2. On the side facing the metal melt, an inner wall of the cover is formed substantially smooth and free of grooves and gaps. Cooling channels arranged on the outer side of the inner wall so that the surface temperature of the inner wall is maintained at a temperature of maximum 350° C.

VERFAHREN UND VORRICHTUNG ZUR REGELUNG DES KONDENSATORKÜHLWASSERS EINER DAMPFSTRAHLVAKUUMPUMPE

The invention relates to method and a device for controlling condenser cooling water of a steam-jet vacuum pump in non-barometric installation; wherein an outer measuring pot constructed as communicating container provides the target value for a speed-controlled pump by means of measuring sensors.

Verfahren zur Kühlung von flüssigkeitsgekühlten Kokillen für metallurgische Prozesse

In order to avoid solidification which proceeds over the meniscus of the metal mirror during the continuous casting or remelting of steels and alloys, the cooling conditions are set in such a way that, in the case of inlet temperatures of the coolant at room temperature or else considerably thereabove, outlet temperatures of the coolant of at least 80°C are achieved. Suitable coolants are pressurized water, metals which are liquid below 100°C and also ionic liquids (salt melts) which are liquid above room temperature and up to at least 200°C, it being possible for the differences in temperature between the coolant inlet and the coolant outlet in the mould to be between 5°C and 150°C.

Verfahren und Anordnung zum Vakuumblockguss

Large forging ingots are cast into an ingot mold (4) placed in a vacuum vessel (1) proceeding from an intermediate vessel (9) that is arranged on the cover (7) of the vacuum vessel (1) and connected thereto in a vacuum-tight manner, through an outlet opening (10) present above the ingot mold (4). Said outlet opening is separated from a feeder region (15) by a calming section (16) and can, for the purpose of calming the steel flow and of promoting the removal of non-metal inclusions, comprise deflection dams (17) and inert gas bubblers (18).

VERFAHREN UND VORRICHTUNG ZUR KONTINUIERLICHEN ERFASSUNG DES SCHLACKENNIVEAUS IN ESU-ANLAGEN MIT KURZEN GLEITKOKILLEN

A method and an installation for the continuous checking and regulation of the level of the surface of a slag bath in an ESR installation with short slidable molds. For the continuous measurement of the position of the surface of the slag bath, the method employs a radar beam emitted by a radar measuring probe and directed approximately vertically onto the surface.

VERFAHREN UND ANLAGE ZUR HERSTELLUNG HOHLER UMSCHMELZBLÖCKE

The method involves melting two consumable electrodes (12) in a water-cooled mould (10). The electrodes have a diameter larger than size of an annular gap (15) formed between a portion of mould and a mandrel (17). A T-shaped flaring (11) is formed in an area of consumable electrodes. An inner diameter of cast ingot (18) is formed by water-cooled mandrel that is introduced into mould. The diameter of mandrel is downwardly tapered in an area of a metal liquid level (27) of a liquid heel (14). The liquid level of metal is adjusted below a level of flaring. An independent claim is included for production system of hollow cast ingots.

VERFAHREN ZUM ELEKTROSCHLACKE UMSCHMELZEN VON METALLEN

Mold comprises an upper insulated part (20) having several layers to prevent heat loss. A heat-insulating intermediate layer (28) is arranged between a support construction (22) which represents the outer layer and a temperature-resistant layer (26) in contact with a slag bath. An independent claim is also included for a method for electro-slag refining of metals based on iron and nickel alloys using the above mold.

VERFAHREN UND ANLAGE ZUR HERSTELLUNG HOHLER UMSCHMELZBLÖCKE

VERFAHREN UND VORRICHTUNG ZUR KONTINUIERLICHEN ERFASSUNG DES SCHLACKENNIVEAUS IN ESU-ANLAGEN MIT KURZEN GLEITKOKILLEN

Electroslag remelting in a short sliding mold (13), comprises monitoring the level of a surface (11) of a slag bath (9) in an electroslag-remelting system (10). The level of the surface of the slag bath is preferably continuously measured using preferably a radar measurement probe (3) arranged in a mold cover or a protective gas cover of the electroslag-remelting system. The radar beam produced from the radar measurement probe is guided so that the radar beam strikes on the surface of the slag bath. The determined level of the surface is indicated or represented by an evaluation device. Electroslag remelting in a short sliding mold (13), comprises monitoring the level of a surface (11) of a slag bath (9) in an electroslag-remelting system (10). The level of the surface of the slag bath is preferably continuously measured using preferably a radar measurement probe (3) arranged in a mold cover or a protective gas cover of the electroslag-remelting system. The radar beam produced from the ...

UMSCHMELZANLAGE FÜR SELBSTVERZEHRENDE ELEKTRODEN

Eine Anlage zum Umschmelzen selbstverzehrbarer Elektroden kann sowohl als Vakuumlichtbogenofen als auch als Elektroschlacke-Umschmelzanlage betrieben werden, wobei die Anlage sowohl über eine zu- bzw. wegschaltbare Gleichstrom- (26) als auch Wechselstromversorgung (27) verfügt und alternativ an ein Vakuumpumpensystem (16) bzw. eine Schutzgasversorgung (24) und Rauchgasabsaugung (21) sowie eine Dosiervorrichtung (31, 32) für Schlacke und Desoxidationsmittel angeschlossen werden kann.

Verfahren zur Herstellung von langen Gussblöcken großen Querschnitts

The invention relates to a method and a plant for producing ingots that have large cross-sections of different shapes and are more than 5 meters long, said method involving casting an ingot in a short, water-cooled ingot mold (4) and withdrawing the solidifying ingot (6) until the desired ingot length has been reached, whereupon the metal pool is heated using an electroslag remelting process with the help of consumable electrodes (18), or fresh molten metal is poured from a heated intermediate vessel (3) or a heatable cover (22), and the solidifying structure is influenced by using electromagnetic agitators (1, 11, 13) during the casting operation and upon completion of the casting operation until the ingot has completely solidified.

WASSERGEKÜHLTER DECKEL FÜR EIN FEUERFEST ZUGESTELLTES BEHANDLUNGSGEFÄSS FÜR METALLSCHMELZEN

The water-cooled lid (10) comprises two sub-elements, a flange (12) part element formed by sub-elements, an inner wall, cooling channels (15), and a central opening, where a lance is inserted through the opening of an inner wall of the treatment vessel. The lid is formed like a dome, where the ratio of internal clear height to inner light diameter of a flange of the lid is 0.2. The inner wall of lid facing the side of the molten metal is smooth and crease-free, and is formed without a gap. The cooling channels are arranged on outside of the inner wall. The water-cooled lid (10) comprises two sub-elements, a flange (12) part element formed by sub-elements, an inner wall, cooling channels (15), and a central opening, where a lance is inserted through the opening of an inner wall of the treatment vessel. The lid is formed like a dome, where the ratio of internal clear height to inner light diameter of a flange of the lid is 0.2. The inner wall of lid facing the side of the molten metal is ...

UMSCHMELZANLAGE FÜR SELBSTVERZEHRENDE ELEKTRODEN

A system (100) for remelting consumable electrodes (9) can be operated both as a vacuum arc furnace and as an electro-slag remelting system, wherein the system (100) has both a direct current (26) and an alternating current source (27), and can be connected alternatively to a vacuum pump system (16) or to an inert gas supply (24) and flue gas extractor (21) as well as to a metering device (31, 32) for slag and deoxidising agent.

VERFAHREN UND VORRICHTUNG ZUR REGELUNG DES KONDENSATORKÜHLWASSERS EINER DAMPFSTRAHLVAKUUMPUMPE

The invention relates to method and a device for controlling condenser cooling water of a steam-jet vacuum pump in non-barometric installation; wherein an outer measuring pot constructed as communicating container provides the target value for a speed-controlled pump by means of measuring sensors.