EP 0401988 A3 19910206 - RETAINING AND/OR POURING MEANS FOR TANKS FOR METAL MELTING BATHS
Title (en)
RETAINING AND/OR POURING MEANS FOR TANKS FOR METAL MELTING BATHS
Publication
Application
Priority
DE 8907044 U 19890608
Abstract (en)
[origin: EP0401988A2] The invention relates to means for retaining contaminations in metal melting baths, e.g. a tundish containing molten metal. Contaminations, e.g. from slag and other covering layers on the metal surface, can pass through the outlet of the tundish and hence contaminate the cast metal. The invention aims to avoid this problem by providing an annular buoyancy body (2) which surrounds the outlet (4), the body (2) being in the form of a protective ring preventing particles (10, 11) floating on the surface of the metal (12) from entering outlet (4). The body (2) may be constrained to surround a starting tube (1) which surrounds outlet (4) and to float up the starting tube (1) with increasing depth of molten metal (12). Pouring openings (3) in the starting tube (1) are thereby effectively closed by body (2) as the slag-covered surface of the metal (12) rises above the openings (3) and the openings (3) are then exposed to allow molten metal (12) to flow through only after layers (10, 11) of potential contaminations have safely passed.
IPC 1-7
IPC 8 full level
B22D 11/10 (2006.01); B22D 11/11 (2006.01); B22D 11/112 (2006.01); B22D 11/116 (2006.01); B22D 11/117 (2006.01); B22D 41/08 (2006.01); B22D 41/50 (2006.01); B22D 43/00 (2006.01)
CPC (source: EP)
B22D 43/002 (2013.01)
Citation (search report)
- [X] CH 517542 A 19720115 - CONCAST AG [CH]
- [XP] DE 8907044 U1 19890803
- [X] FR 2224230 A1 19741031 - THERMO IND GMBH ET CO KG [DE]
- [X] US 4526349 A 19850702 - SCHWER JOHN W [US]
- [A] DE 2830811 A1 19800131 - EISEN U STAHLWERK PLEISSNER GM
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0401988 A2 19901212; EP 0401988 A3 19910206; EP 0401988 B1 19931124; AT E97598 T1 19931215; CA 2018376 A1 19901208; DD 294890 A5 19911017; DE 69004742 D1 19940105; DE 69004742 T2 19940317; DE 8907044 U1 19890803; ES 2045806 T3 19940116; JP H0371971 A 19910327; TR 27237 A 19941220
DOCDB simple family (application)
EP 90305293 A 19900516; AT 90305293 T 19900516; CA 2018376 A 19900606; DD 34137090 A 19900606; DE 69004742 T 19900516; DE 8907044 U 19890608; ES 90305293 T 19900516; JP 14974290 A 19900606; TR 50490 A 19900620