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AssigneeChemikalien-Gesellschaft Hans Lungmuss m.b.H.
InventorThomas Ferdinand Middeldorf
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The procedure for manufacturing fireproof crucibles for steel-processing ladles, in which aluminum deoxidation is carried out for the total quenching of liquid steel, is such that a monolithically hardening fireproof mass with a proportion of silicon dioxide is placed between the inside wall of the ladle and a reusable plug that is installed therein. After the plug has been removed, the ladle is put into use again, at which time a layer that contains alumina builds up on the hot side of the fireproof crucible and a highly sintered layer of greater hardness forms behind this. It is intended that a procedure such as this should simplify the reestablishment of the fireproof lining when the limits of use are reached, in view of the use of a layer that contains alumina and the highly sintered layer located behind this on the inside wall of the crucible. To this end, after a number of charges have been processed, a second crucible is installed as an expendable crucible within the first crucible, which now forms a safety crucible, this being done with the help of an appropriately smaller plug; when this reaches its limits of use it is broken out and the layer is reinstalled.
A process for manufacturing fireproof crucibles for steel-processing ladles, in which aluminum deoxidation is carried out for total quenching of liquid steel, in which a monolithically hardened fireproof mass that contains alumina with a proportion of silicon dioxide is inserted between an inside wall of the ladle and a reusable steel plug is installed therein forming a fireproof first crucible, the ladle being used after removal of the plug, at which time a layer that contains alumina forms on a hot inner side of the fireproof first crucible, a highly sintered surface layer of greater hardness forming thereon, wherein after a number of charges, using an appropriately smaller plug, a second expendable crucible is formed inward of the fireproof first crucible whereby the second expendable crucible can be broken out on reaching its limit of use, and a replacement second expendable crucible can then be reinstalled.
Dependencies are inferred from the claim text.