Method for separating slag and nonmetallic particles during molt

Details Method for separating slag and nonmetallic particles during molt Method for separating slag and nonmetallic particles during molt

1992-04-23

1994-07-26

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75582, 75584, 164337, 266227, C22B 900

Patent

active

053324161

ABSTRACT:
A method and apparatus is provided for temporarily retaining slag and nonmetallic particles in a tundish while molten metal is being transferred through the tundish to other desired vessels. In particular, a meltable dam is placed into an opening between the chambers in a tundish, and the meltable dam retains an accumulation of molten metal in the pour chamber of the tundish with the slag and nonmetallic particles floating on top of that level such that the slag and nonmetallic particles are above the opening between the chambers of the tundish. The dam then completely melts and allows the transfer of molten metal through the opening. The slag and nonmetallic particles are retained in the pour chamber, however, because the molten metal being transferred into the pour chamber maintains the level in that chamber above the opening until almost all of the metal has been transferred into and through the chamber. In this manner, problems associated with the transfer of slag and nonmetallic particles with the first flow of molten metal in VIM teeming operations are eliminated.

REFERENCES:
patent: 631736 (1899-08-01), Collins
patent: 3193892 (1965-07-01), Sickbert
patent: 4043543 (1977-08-01), Courtenay et al.
patent: 4125146 (1978-11-01), Muller et al.
patent: 4522322 (1985-06-01), Guntermann et al.
patent: 4549600 (1985-10-01), Kauserud

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