EP 0226994 B1 19900718 - AGENT FOR DESULPHURATION OF MOLTEN IRON AND PROCESS FOR ITS PRODUCTION
Title (en)
AGENT FOR DESULPHURATION OF MOLTEN IRON AND PROCESS FOR ITS PRODUCTION
Publication
Application
Priority
- DE 3544562 A 19851217
- DE 3544563 A 19851217
Abstract (en)
[origin: US4764211A] A fine-grained agent for desulfurizing molten iron comprising industrial calcium carbide, dried coal which contains at least 15% by weight of volatile constituents and which, immediately after being passed into the molten iron, releases at least 80 standard liters of gas per kg of coal, and optionally contains fine-grained magnesium. The coals used are lignites, flame coal, gas-flame coal, gas coal or coking coal. The agent is prepared by addition of the dried coal to the calcium carbide, if appropriate, pre-crushed, and common comminuted to a grain size of 90% <200 mu m. The fine-grained magnesium is present in the agent either in uniform distribution, or it is stored and fluidized separately from the carbide/coal mixture and added to the carbide/coal mixture in the transport line or in the lance, if appropriate, with variation during injection.
IPC 1-7
IPC 8 full level
C21C 1/02 (2006.01)
CPC (source: EP US)
C21C 1/025 (2013.01 - EP US)
Citation (examination)
Hütte, Taschenbuch für Eisenhüttenleute, 1961, S.278-382
Designated contracting state (EPC)
AT BE DE ES FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0226994 A1 19870701; EP 0226994 B1 19900718; AU 571147 B2 19880331; AU 6616786 A 19870618; BR 8606249 A 19870929; CA 1261633 A 19890926; CN 1006809 B 19900214; CN 86108525 A 19870729; DE 3672779 D1 19900823; ES 2016557 B3 19901116; FI 83095 B 19910215; FI 83095 C 19910527; FI 865126 A0 19861216; FI 865126 A 19870618; JP H02163308 A 19900622; JP H0645813 B2 19940615; NO 168057 B 19910930; NO 168057 C 19920108; NO 865074 D0 19861216; NO 865074 L 19870618; US 4764211 A 19880816; US 4832739 A 19890523
DOCDB simple family (application)
EP 86117417 A 19861215; AU 6616786 A 19861208; BR 8606249 A 19851217; CA 525509 A 19861216; CN 86108525 A 19861216; DE 3672779 T 19861215; ES 86117417 T 19861215; FI 865126 A 19861216; JP 6649089 A 19890320; NO 865074 A 19861216; US 20832488 A 19880617; US 94246986 A 19861216