EP 0281796 B1 19900124 - METHOD OF PRODUCING AFFINED FERROMANGANESE
Title (en)
METHOD OF PRODUCING AFFINED FERROMANGANESE
Publication
Application
Priority
DE 3707696 A 19870311
Abstract (en)
[origin: US4808220A] The invention relates to a process for the preparation of low-carbon and low-silicon ferromanganese (refined ferromanganese) by blowing with pure oxygen in a converter ferromanganese of high carbon content (high-carbon ferromanganese) produced in a blast furnace. The characterizing feature of the invention is that in an oxidation phase oxygen is blown from above with a top blowing lance on to the melt of high-carbon ferromanganese melt, while at the same time an inert stirring gas is blown through tuyeres into the melt below its level, and on termination of oxygen top blowing, in an immediately following reduction phase, solid reducing agents and lumps of lime are added to the melt to recover the slagged manganese.
IPC 1-7
IPC 8 full level
C22C 33/04 (2006.01); C22C 33/00 (2006.01); C22C 35/00 (2006.01)
CPC (source: EP US)
C22C 33/003 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 0281796 A1 19880914; EP 0281796 B1 19900124; DE 3707696 A1 19880922; DE 3707696 C2 19890914; DE 3860029 D1 19900301; ES 2013311 B3 19900501; JP S63290242 A 19881128; US 4808220 A 19890228; ZA 881149 B 19880815
DOCDB simple family (application)
EP 88102163 A 19880215; DE 3707696 A 19870311; DE 3860029 T 19880215; ES 88102163 T 19880215; JP 5653088 A 19880311; US 16253988 A 19880301; ZA 881149 A 19880218