Tundish and method for production of a metal strip of high...

Metal founding – Process – Shaping liquid metal against a forming surface

Reexamination Certificate

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C164S437000, C222S591000

Reexamination Certificate

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07108048

ABSTRACT:
To achieve the highest possible separation rate for foreign particles in a tundish combined, at the same time, with a minimized level of inclusions, the refractory-lined interior space of the tundish, as a function of an operating bath level (h), satisfies the condition that a dimensionless ratio (κ) of the refractory-lined surface area (Aref) to the filling volume (V) which is delimited by this refractory-lined surface area and the bath-level-dependent exposed surface area (ATop) and results from the relationshipκ=Aref(V)23be between 3.83 and 4.39.

REFERENCES:
patent: 3333746 (1967-08-01), Cope et al.
patent: 4715586 (1987-12-01), Schmidt et al.
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patent: 0 376 523 (1990-07-01), None
patent: 0 804 306 (1990-07-01), None
patent: 0 533 943 (1993-03-01), None
patent: 57 115949 (1982-07-01), None
patent: WO 01/61059 (2001-08-01), None
International Search Report dated Aug. 7, 2003.
English language equivalents of German Patent No. 3 514 539=.
U.S. 4 632,668 dated Dec. 1986 Wilson, Jr. et al. and Divisional U.S. 4,739,972 dated Apr. 1988 Podrini.

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