EP 0949339 B1 20010530 - RH vacuum process with controlled circulation rate for the decarburization of steel melts
Title (en)
RH vacuum process with controlled circulation rate for the decarburization of steel melts
Title (de)
RH-Vakuumverfahren mit Massenumlaufratesteuerung zur Reduzierung des Kohlenstoffgehalts einer Stahlschmelze
Title (fr)
Procédé RH de dégazage sous vide à taux de circulation contrôlé pour réduire la teneur en carbone d'aciers en fusion
Publication
Application
Priority
DE 19815298 A 19980406
Abstract (en)
[origin: EP0949339A1] RH vacuum decarburization process for molten steel uses a decarburization kinetics computer model to determine the carbon content reduction for comparison with a threshold carbon content value. RH vacuum decarburization process for molten steel comprises: (a) determining the differential force for melt circulation from the melt differential pressure in riser and fall pipes resulting from injected transport gas (VFG) and produced reaction gas (VCO) in the riser pipe (5); (b) determining the circulating melt mass flow (MSt) from the differential force; (c) determining the reduction in oxygen and carbon contents in the melt using a computer model for decarburization kinetics; (d) repeating steps (a) to (c) if the determined carbon content is greater than a threshold value (Ce); and (e) ending the treatment if the determined carbon content is not greater than the threshold value.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C21C 7/10 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0949339 A1 19991013; EP 0949339 B1 20010530; AT E201717 T1 20010615; DE 19815298 A1 19991007; DE 19815298 C2 20000531; DE 59900106 D1 20010705
DOCDB simple family (application)
EP 99105806 A 19990323; AT 99105806 T 19990323; DE 19815298 A 19980406; DE 59900106 T 19990323