Abstract:
A cooling plate for a metallurgical furnace comprising a body (12) with a front face (18) and an opposite rear face (20), the body having at least one coolant channel (14) therein; the front face (18) being turned towards the furnace interior and preferably comprises alternating ribs (22) and grooves (24). The cooling plate includes wear detection means comprising: a plurality of closed pressure chambers (26, 28) distributed at different locations in said body, said pressure chambers being positioned at predetermined depths below the front face (18) of said body; and a pressure sensor (30) associated with each pressure chamber (26, 28) in order to detect a deviation from a reference pressure inside said pressure chamber when the latter becomes open due to wear out of said body.
Abstract:
A metallic water jacket of an arc furnace is provided with aluminium-diffused permeable coating formed by calorizing. The coating is 200-800 microns thick and it has an aluminium concentration of 10-50% by weight at its surface.
Abstract:
An electric arc furnace (10) has an outer shell (12) and an inner refractory lining (24). During its operation the electric arc furnace (10) contains a bath (28) of molten metal which has a minimum and a maximum operational level (32). An inner cooling ring (23) of copper slabs (20), which are in thermo-conductive contact with the inner refractory lining (24) and equipped with spray cooling means (22), is mounted to the outer shell (12) in the region (34) between the minimum and the maximum operational level (32).
Abstract:
A furnace accessory of which the whole or part requires to be cooled in use (e.g. a tuyere, a plate cooler or a stave cooler for a blast furnace or an electric clamp or shoe for an electric furnace) incorporates one or more heat pipes (21) so disposed as to conduct heat from a first position in the accessory to a second position relative to the accessory, from which second position heat can be removed from the heat pipe.
Abstract:
It is proposed herein to add supplementary cooling elements to a primary cooling element of a furnace. The supplementary cooling elements, with two or more components, may be inserted from the outside of the furnace into holes that pass through and the primary cooling element such that the cooling elements protrude beyond the inner surface of the primary cooling element. An inner one of the components of the supplementary cooling element may be received by an outer one of the components in a manner that forces the outer component into a thermally conductive pressure connection with the primary cooling element.
Abstract:
An electric arc furnace (10) has an outer shell (12) and an inner refractory lining (24). During its operation the electric arc furnace (10) contains a bath (28) of molten metal which has a minimum and a maximum operational level (32). An inner cooling ring (23) of copper slabs (20), which are in thermo-conductive contact with the inner refractory lining (24) and equipped with spray cooling means (22), is mounted to the outer shell (12) in the region (34) between the minimum and the maximum operational level (32).
Abstract:
Wall structure for a metallurgical vessel at the location where the vessel wall, on the hot side, is in contact with liquid metal and/or liquid slag, in particular for the hearth of a shaft furnace, comprising a steel plate lining (2), inside which lining at least one layer of refractory brickwork (15, 16, 17) is arranged, the steel plate lining (2) being joined to the layer (layers) of brickwork by means of mortar joints (5) and/or ramming compound joints (5) to form a cohesive structure, characterized in that metal bars (11) which run in the circumferential direction inside the steel plate lining (2) and project into the wall are present, which bars are connected to the outer side of the steel plate lining by means of attachment means (20) running through the steel plate lining, each assembly comprising a metal bar (11) and its attachment means (20) and the steel plate lining (2) forming, in the vertical direction, a unit which is sufficiently elastic to maintain a surface-to-surface contact along horizontal surfaces between the metal bars (11) and bricks (15, 16, 17) during operation.
Abstract:
Le dispositif de refroidissement d'une paroi d'un four à cuve comprend des éléments longitudinaux refroidis auxquels on a donné la forme de tube (1) et qui sont disposés le long de la paroi du four, et des avancements de support refroidis ayant la forme de tubes (2) avec des bagues. Les bagues sont fixées sur les tubes (1) des éléments longitudinaux refroidis. Les tubes (2) des avancements longitudinaux refroidis sont disposés par rapport aux tubes (1) des éléments longitudinaux refroidis de manière à former un angle de 90o ou moins entre eux.