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(11)

EP 2 864 511 A1

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(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 13734361.2 (22) Date of filing: 21.06.2013

(51) International Patent Classification (IPC):  C22B 7/00(2006.01) C02F 101/20(2006.01) C02F 11/00(2006.01) C02F 11/10(2006.01) (86) International application number: PCT/EP2013/063052 (87) International publication number: WO 2013/190116 (27.12.2013 Gazette 2013/52)

(84) Designated Contracting States: 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 States: BA ME (30) Priority: 21.06.2012 WO PCT/EP2012/061986 (71) Applicant: Outotec (Finland) Oy 02230 Espoo (FI)	(72) Inventors: LOHRBERG, Dirk 63069 Offenbach (DE) STEGEMANN, Bertold 65760 Eschborn (DE) SCHNEIDER, Günter 64653 Lorsch (DE) HERMANN, Ludwig A-2214 Auersthal (AT) (74) Representative: Keil & Schaafhausen Patent- und Rechtsanwälte  Friedrichstrasse 2-6 60323 Frankfurt am Main 60323 Frankfurt am Main (DE)