EP 1194597 A1 20020410 - METHOD FOR RECOVERING METALLIC CHROMIUM FROM SLAG CONTAINING CHROMIUM OXIDE
Title (en)
METHOD FOR RECOVERING METALLIC CHROMIUM FROM SLAG CONTAINING CHROMIUM OXIDE
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON METALLISCHEM CHROM AUS CHROMOXID ENTHALTENDEN SCHLACKEN
Title (fr)
PROCEDE POUR LA RECUPERATION DE CHROME METALLIQUE A PARTIR DE LAITIER CONTENANT DE L'OXYDE DE CHROME
Publication
Application
Priority
- DE 0002030 W 20000623
- DE 19929551 A 19990623
Abstract (en)
[origin: WO0079014A1] The invention relates to a method for recovering metallic chromium from slag containing chromium oxide, from converter processes such as AOD, MRP, AOD-L, MRP-L, CLU, ASM, Conarc stainless steel or vacuum processes such as VOD, SS-VOD, RH and RH with lance. The slag produced at the end of a blasting or treatment process in a converter or a vacuum installation is tapped or drawn off unreduced. This slag is then charged into an electric furnace, which is also charged with a usual charge consisting of scrap and optionally, residual dust. Carbon and optionally, silicon are added. During the melting process, the chromium oxide contained in the slag is directly reduced to metallic chromium by the carbon and the silicon.
IPC 1-7
C21C 7/068; C21C 5/52; C21C 5/00; C22B 7/04; C22B 5/04; C21C 5/36; C21B 13/14
IPC 8 full level
C21C 5/00 (2006.01); C21C 5/52 (2006.01); C21C 7/068 (2006.01); C22B 5/04 (2006.01); C22B 5/10 (2006.01); C22B 7/04 (2006.01); C22B 34/30 (2006.01); C22B 34/32 (2006.01); C22C 33/04 (2006.01)
CPC (source: EP KR US)
C21C 5/005 (2013.01 - EP KR US); C21C 5/5252 (2013.01 - EP US); C21C 5/5264 (2013.01 - EP KR US); C21C 7/0685 (2013.01 - EP KR US); C22B 5/04 (2013.01 - EP US); C22B 7/04 (2013.01 - EP US); C21C 2005/5258 (2013.01 - KR); F27D 2003/168 (2013.01 - KR); Y02P 10/20 (2015.11 - EP US)
Citation (search report)
See references of WO 0079014A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT
DOCDB simple family (publication)
WO 0079014 A1 20001228; AU 6554700 A 20010109; BR 0011949 A 20020326; CN 1217017 C 20050831; CN 1357055 A 20020703; CZ 20014667 A3 20020515; CZ 303288 B6 20120718; EP 1194597 A1 20020410; JP 2003502504 A 20030121; JP 2013079449 A 20130502; KR 20020014821 A 20020225; MX PA01012898 A 20020730; PL 352472 A1 20030825; RU 2247161 C2 20050227; US 6679931 B1 20040120; ZA 200200517 B 20030625
DOCDB simple family (application)
DE 0002030 W 20000623; AU 6554700 A 20000623; BR 0011949 A 20000623; CN 00809293 A 20000623; CZ 20014667 A 20000623; EP 00952861 A 20000623; JP 2001505357 A 20000623; JP 2012258618 A 20121127; KR 20017016491 A 20011222; MX PA01012898 A 20000623; PL 35247200 A 20000623; RU 2002101484 A 20000623; US 1920702 A 20020409; ZA 200200517 A 20020121