摘要:
An arrangement (10) for preventing egress of a gas from a first opening of a vessel, the vessel including at least one other opening through which the gas can leave the vessel, the arrangement comprising an open passage (48) extending substantially around the first opening, the open passage (48) receiving a flow of gas such that the flow of gas leaves the open passage and flows towards and into the vessel to cause a gas from the environment external to the vessel to be drawn into the vessel. The arrangement may comprise a Coanda surface. The arrangement may be in the form of an inert for placement in the opening to the furnace.
摘要:
A smelting vessel (4) for producing molten metal includes a refractory lined hearth that in use is in contact with molten slag or molten metal in the smelting vessel, and the hearth includes a plurality of heat pipes (2.1) positioned in a refractory lining of at least a part of the hearth for cooling the refractory lining.
摘要:
The present invention relates to an injector for use in metallurgical plants, in particular in a Basic Oxygen Furnace (BOF), in an Argon Oxygen Decarburisation (AOD) converter or in an Electric Arc Furnace (EAF), having a primary nozzle, configured as a supersonic nozzle, for blowing an oxygen-rich gas onto a metal melt, and having a secondary nozzle, arranged coaxially with respect to the primary nozzle, for generating a coaxial jet which surrounds the gas jet emerging from the primary nozzle, wherein the primary nozzle has a convergent section and a divergent section which adjoin one another at a radius of the narrowest cross section r*, and wherein the primary nozzle and the secondary nozzle are defined by the following set of nozzle forms in the respective design situation thereof: (see table)
摘要:
Eine Blaslanze (5) für eine Metallschmelzen-Vakuumbehandlungsanlage weist einen Außenmantel (8) auf, der sich entlang einer Blaslanzenlängsachse (9) erstreckt und innerhalb dessen eine Sauerstoffführung (13) verläuft, die an einem Ausblasende (4) der Blaslanze (5) einen Sauerstoff-Austritt (14) zum Austreten von Sauerstoff (6) aufweist. Innerhalb des Außenmantels (8) verläuft eine Brenngasführung (17), die am Ausblasende (4) Brenngas-Austritte (18) zum Austreten eines Brenngases (19) aufweist. In der Blaslanze (5) ist eine Zündeinrichtung (22) angeordnet, die eine Zündspitze (23) zum Zünden eines brennbaren Gasgemisches aufweist. Die Zündeinrichtung (22) ist zwischen einer ausgefahrenen Stellung und einer zurückgezogenen Stellung verfahrbar. In der ausgefahrenen Stellung wirkt die Zündspitze (23) auf einen Mischbereich (21), in dem sich der dem Sauerstoff-Austritt (14) zugeführte Sauerstoff (6) und das an den Brenngas-Austritten (18) austretende Brenngas (19) zu dem zündfähigen Gasgemisch mischen. In der zurückgezogenen Stellung ist die Zündeinrichtung (22) in einen Schutzbereich (31) zurückgezogen, in dem die Zündeinrichtung (22) vor Spritzern der Metallschmelze (1) geschützt ist.
摘要:
Schutzvorrichtung für die Oberfläche eines, der Konvertermündung eines kippbaren Vakuum-Konverters (13) zugeordneten Flansches (12). Die Oberfläche des Flansches (12) ist mit einer einen zentrischen Durchlass aufweisenden Abdeckung (11) abdeckbar, wobei die Abdeckung (11) an ihrer, dem Konverter zugewandten Unterseite (14) eine den Flansch (12) formschlüssig umgreifende ringförmige Ausnehmung (15) aufweist.
摘要:
A metallurgical vessel e.g. a steel converter or a tundish has a supporting and/or protecting metal flange 2, 3 extending around its opening. In order to reduce thermal stresses in the flange there are a plurality of removed portions 8, 13 of the flange metal at or close to the inner periphery 7 of the flange and distributed circumferentially around the flange. The removed portions may be holes 8 spaced from the inner periphery of the flange, and/or may be slots 13 extending across part of the flange radially from the inner periphery.
摘要:
The structure of the oxygen passage in a supporting trunnion (41) of a steel converter vessel (1) comprises a hollow chamber (46) provided where a trunnion shaft (42) projects from a trunnion ring. In the hollow chamber (46) is inserted a hermetic manifold (47) to which a horizontal pipe (52) communicating with a rotary joint (9) and a vertical pipe (53) communicating with an oxygen tuyere in the bottom of the converter vessel (1) are welded. Inside the manifold (47) there is fitted a communicating member (59) containing a bend-like passage through which the horizontal and vertical pipes (52, 53) communicate with each other. This structure of the oxygen passage prevents the danger of an oxygen-induced combustion (Fig 12).
摘要:
A furnace slag amount estimation device (1) includes: an input unit (11) configured to receive input data including furnace shape data for a converter, data on components and temperatures of molten metal and slag before start of or during blowing treatment, and slag height data in a furnace of the converter; a slag bulk density calculation unit (13) configured to calculate a slag bulk density after the converter is tilted, using the input data and a model; a slag volume calculation unit (14) configured to calculate a slag volume in the furnace after the converter is tilted, using the slag height data after the converter is tilted, the furnace shape data, and a model; and a slag weight calculation unit (15) configured to calculate a slag weight in the furnace after the converter is tilted and slag is discharged, using the calculated slag bulk density and the calculated slag volume.