Voest-alpine Aktiengesellschaft

Voest-alpine International Corporation

Franz Lang

Othmar Kriegner

Gunter Holleis

Karl Schwaha

Fritz Granitz

The jet exiting from jet nozzles is guided along a guide surface for a jet nozzle with one or more nozzle channels disposed next to each other and in parallel, where the hydraulic diameter of the nozzle channels is from about 1.5 to 4 millimeters. In order to limit sharply and without spray the jet exiting out of the jet nozzle crosswise to its axis on the sides and in order to maintain it of uniform width over a large part of its length, the guide surface is of concave shape, the nozzle channels merge without step into the cylindrical jacket surface, the axes of the nozzle channels and the guide surface include an angle of from 0.5 and 2.5 degrees, and the guide surface is provided with a tear-off provision with a cutting edge.

Jet nozzle

A strand guide for a continuous casting plant includes rollers supporting and guiding the strand. Each roller has a cavity through which a coolant flows and which is connected with a coolant supply duct and a coolant discharge duct. The coolant discharge duct is aligned in duct-like manner with at least one tuyere or a set of tuyeres of an external cooling device. In order to combine the advantages of an external cooling device with the advantages of an internal cooling of the rollers, the external cooling device includes tuyeres or sets of tuyeres arranged between the rollers. Each tuyere or set of tuyeres is arranged adjacent the roller end that includes the coolant discharge duct. The jet direction of the tuyere or tuyeres of the set of tuyeres is directed opposite to the flow direction of the coolant through the roller.

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Linz, Austria

Franz Lang