EP 3433391 A1 20190130 - PROCESS FOR PROCESSING RED MUD AND PRODUCING RARE-EARTH METAL SALTS
Title (en)
PROCESS FOR PROCESSING RED MUD AND PRODUCING RARE-EARTH METAL SALTS
Title (de)
VERFAHREN ZUR VERARBEITUNG VON ROTSCHLAMM UND ZUR HERSTELLUNG VON SELTENERDMETALLSALZEN
Title (fr)
PROCÉDÉ DE TRAITEMENT DE BOUE ROUGE ET DE PRODUCTION DE SELS DE MÉTAL DE TERRES RARES
Publication
Application
Priority
- HU P1600218 A 20160325
- HU P1600393 A 20160624
- HU 2017050007 W 20170323
Abstract (en)
[origin: US2020299806A1] The invention relates to a process for processing red mud, said process comprising the following steps: (a) providing red mud waste of alumina production (in the following: red mud); (b) further, providing waste containing organic material, and converting to synthesis gas by high temperature pyrolysis; (c) converting the sodium oxide present in the red mud in the form of soluble glass to sodium carbonate with carbonic acid; (d1) magnetizing the Fe2O3 hematite ferric oxide present in the red mud and separating the anti-ferromagnetic Fe2O3 hematite ferric oxide from the remained slurry by magnetic separator; (d2) converting the Fe2O3 hematite ferric oxide present in the red mud to Fe3O4 magnetite ferrous ferric oxide with synthesis gas, and separating the Fe3O4 magnetite ferrous ferric oxide from the remained slurry by magnetic separator; (e) treating the remained slurry obtained in steps (d1) or (d2) with strong acid, thus obtaining metal sulphate solution and SiO2 and TiO2 suspension.
IPC 8 full level
C22B 7/00 (2006.01); C22B 59/00 (2006.01)
CPC (source: EP US)
C22B 7/007 (2013.01 - EP US); C22B 59/00 (2013.01 - EP US); Y02P 10/20 (2015.11 - EP)
Citation (search report)
See references of WO 2017163094A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
US 2020299806 A1 20200924; EP 3433391 A1 20190130; MA 44488 A 20190130; RU 2018136337 A 20200427; RU 2018136337 A3 20200518; WO 2017163094 A1 20170928
DOCDB simple family (application)
US 201716087683 A 20170323; EP 17728251 A 20170323; HU 2017050007 W 20170323; MA 44488 A 20170323; RU 2018136337 A 20170323