(19)

(11)

EP 2 547 802 A1

(12)

(43) Date of publication: 23.01.2013 Bulletin 2013/04 (21) Application number: 11755747.0 (22) Date of filing: 16.03.2011

(51) International Patent Classification (IPC):  C22B 23/00(2006.01) C22B 7/00(2006.01) C22B 3/10(2006.01) (86) International application number: PCT/FI2011/050222 (87) International publication number: WO 2011/114000 (22.09.2011 Gazette 2011/38)

(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 (30) Priority: 18.03.2010 FI 20100121 (71) Applicant: Outotec OYJ 02200 Espoo (FI)	(72) Inventors: LAITALA, Hannu FI-02700 Kauniainen (FI) KARONEN, Janne FI-32800 Kokemäki (FI) HAAVANLAMMI, Liisa FI-02200 Espoo (FI) (74) Representative: Friman, Tea Marika  Kolster OY AB Iso Roobertinkatu 23 P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)