摘要:
Es werden eine Verfahren und eine Vorrichtung zum Einleiten feinteiliger, kohlenstoffhaltiger Brennstoffe, die in einem Trägergas suspendiert sind, und Sauerstoff in eine Eisenschmelze beschrieben. Bei dem Verfahren können Brennstoff und Sauerstoff im Wechsel durch den gleichen Einleitungskanal einer Düse in eine Eisenschmelze unterhalb der Eisenbadoberfläche eingeleitet werden. Die Vorrichtung gestattet die wechselweise Zuführung von Brennstoff oder Sauerstoff und wird durch den Sauerstoffleitungsdruck gesteuert.
摘要:
La pièce selon l'invention est destinée à être mise au contact d'un métal en fusion et se caractérise en ce qu'elle est essentiellement constituée d'une masse en matériau réfractaire non-poreux présentant une pluralité de discontinuités locales s'étendant sur toute sa hauteur dans la direction du soufflage gazeux et constituant des zones étroites de passage gazeux. Dans un mode de réalisation, les discontinuités (8) sont obtenues par assemblage (1 dans une enveloppe métallique (3), d'éléments réfractaires non-poreux (2) en forme de plaques et juxtaposés par leurs grandes faces latérales sans interposition de joints matériels d'étanchéité. La pièce selon l'invention est facilement réalisable. Elle présente en outre toutes les qualités requises de sélectivité ou d'orientation de manière à posséder une durée de vie sensiblement égale à celle du garnissage réfractaire du récipient métallurgique destiné à la recevoir tout en permettant d'insuffler les débits de gaz voulus.
摘要:
A purging plug (1) for blowing gas to be attached to an opening (41) of a molten metal treatment recipient, comprises a core (2) having a shape extended along a longitudinal axis (40) from a bottom side (5) to a top side (6), wherein the core is substantially made of a first material, wherein the first material has a first permeability, and a surrounding layer (4) arranged around the core in direction of the longitudinal axis from the bottom side to the top side, wherein the surrounding layer is substantially made of a second material, wherein the second material has a second permeability, the second permeability being of higher value than the first permeability. The purging plug further comprises at least one gas passage duct (7) allowing a gas to flow through the gas passage duct from the bottom side to the top side, the gas passage duct being formed according to one of the following configurations: the at least one gas passage duct is formed as an interstice (7) between the core and the surrounding layer; the at least one gas passage duct is formed as a channel (308) in the core; or the at least one gas passage duct is formed as an interstice between the core and the surrounding layer and at least a further gas passage duct is formed as a channel in the core.
摘要:
Die Erfindung betrifft eine Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper, wie er beispielsweise in feuerfesten keramischen Gasspülsteinen benutzt wird, um eine sogenannte gerichtete Porosität im Gasspülstein zu ermöglichen.
摘要:
A method of decarburizing a molten alloy may generally comprise injecting a first gas comprising at least one of argon, carbon dioxide, and oxygen through a first fluid-conducting portion of a tuyere into the molten alloy below the surface of the molten alloy, and injecting a second gas comprising at least one of argon and carbon dioxide through a second fluid-conducting portion of the tuyere into the molten alloy below the surface of the molten alloy. The tuyere may comprise an inner portion concentrically aligned within an outer portion to define an annulus therebetween. The first gas may be injected through the inner portion, and the second gas may be injected through the annulus.
摘要:
The invention relates to a refractory ceramic gas purging plug, with a gas inlet at a first end, the so-called cold end, a gas outlet at a second end, the so-called hot end, and a peripheral surface extending between first and second end.
摘要:
Provided is an integrated system for manufacturing steel including an iron making apparatus and a steel making apparatus. The steel making apparatus produces molten steel from molten iron and agglomerated reduced iron received from the iron making apparatus. The iron making apparatus includes a first iron ore reducing device, first and second agglomerating devices, and a smelting furnace. The fine iron ore reducing device includes first and second fluidized reduction furnace apparatuses respectively including at least one fluidized reduction furnace for reducing fine iron ore. The first and second agglomerating devices agglomerates reduced fine iron ore received from the first and second fluidized reduction furnace apparatuses, respectively. The smelting furnace produces molten iron by melting agglomerated reduced iron received from the first agglomerating device.