Thyssenkrupp Stahl Ag

Dolomitwerke Gmbh

Wolfgang Rasim

Thomas Heller

Bernhard Engl

Eberhard Sowka

Horst Tiemann

Heinz Stripp

Rudlof Kawalla

The invention relates to a method for producing a hot strip, in particular for producing a hot strip intended for the production of a cold strip with good deep-drawing characteristics; in which a steel melt comprising (in % by weight) C:&lE;0.07%, Si:&lE;0.5%, Mn:&lE;2.5%, Al:&lE;0.1%, N:&lE;0.01%, P:&lE;0.025, B:&lE;0.05, if need be up to a total of 0.35% of Nb, Ti and V, with the remainder being iron and the usual impurities is melted; in which the steel melt is continually output in one strand (S) from a permanent casting mould ( ); in which the cast strand (S) immediately after discharge from the permanent casting mould ( ) is led along a cooling line ( ); in which the strand (S) is intensively cooled down to a temperature of A &plusmn;25 K at a cooling rate (a ) of at least 3 K/s; in which, following its intensive cooling, the strand (S) is cooled by exposure to air for at least 30 seconds; and in which the strand (S) itself or thin slabs (D) divided off the strand (S) is/are reheated in a soaking furnace ( ) before the strand (S) or the thin slabs (D) are hot rolled to form hot strip. The method according to the invention makes it possible, during processing of low-alloyed low-carbon steels, to reduce the required temperature in the soaking furnace such that the stress on the furnace is reduced without there being any reduction in the quality of the hot strip produced, or of the cold strip made from said hot strip.

Method for producing a hot strip

It was difficult until now to carry out intermediate repairs of monolithic refractory lining walls of steel casting and handling ladles when the slag area of the lining was worn before other areas. According to this new process for reconstructing the refractory lining in the upper area of the wall, repairs may be economically carried out in that the gap between the lower end of the template and the lining that projects under the area to be reconstructed is sealed by inflating a hose-like sealing body and by deflating again the sealing body before removing the template. This process is useful for steel casting and handling ladles and for similar metallurgical vessels.

Process for the partial reconstruction of the refractory lining of the

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Wesel, Germany

Wolfgang Rasim