Global Patent Index - EP 2864510 A4

EP 2864510 A4 20160302 - METHOD FOR LEACHING ZINC SILICATE ORES

Title (en)

METHOD FOR LEACHING ZINC SILICATE ORES

Title (de)

VERFAHREN ZUR LAUGUNG VON ZINKSILIKATERZEN

Title (fr)

PROCÉDÉ DE LIXIVIATION DE MINERAIS DE SILICATE DE ZINC

Publication

EP 2864510 A4 20160302 (EN)

Application

EP 13809302 A 20130620

Priority

  • AU 2012902708 A 20120626
  • AU 2013202214 A 20130328
  • AU 2013000661 W 20130620

Abstract (en)

[origin: WO2014000021A1] In accordance with the present invention there is provided a method for leaching zinc from an ore, the method comprising the method steps of: curing the zinc silicate ore to be leached through the application of an aqueous solution of a weak acid, producing a cured ore; leaching the cured ore at atmospheric pressure through the application of an ammonium carbonate solution containing free ammonia, producing a pregnant leach solution; and passing the pregnant leach solution to a means for zinc recovery.

IPC 8 full level

C22B 3/04 (2006.01); C22B 3/14 (2006.01); C22B 19/20 (2006.01); C22B 19/32 (2006.01)

CPC (source: EP)

C22B 19/02 (2013.01); C22B 19/24 (2013.01); Y02P 10/20 (2015.11)

Citation (search report)

  • [XI] US 2010180728 A1 20100722 - WELHAM NICHOLAS J [AU], et al
  • [A] T. G. HARVEY: "THE HYDROMETALLURGICAL EXTRACTION OF ZINC BY AMMONIUM CARBONATE: A REVIEW OF THE SCHNABEL PROCESS", MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, vol. 27, no. 4, 1 December 2006 (2006-12-01), US, pages 231 - 279, XP055243806, ISSN: 0882-7508, DOI: 10.1080/08827500600815271
  • [A] ZHOULAN YIN ET AL: "Dissolution of zinc silicate (hemimorphite) with ammonia-ammonium chloride solution", HYDROMETALLURGY., vol. 103, no. 1-4, 1 June 2010 (2010-06-01), NL, pages 215 - 220, XP055243817, ISSN: 0304-386X, DOI: 10.1016/j.hydromet.2010.03.006
  • [A] DIMITRIOS FILIPPOU: "INNOVATIVE HYDROMETALLURGICAL PROCESSES FOR THE PRIMARY PROCESSING OF ZINC", MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW, vol. 25, no. 3, 1 July 2004 (2004-07-01), US, pages 205 - 252, XP055243809, ISSN: 0882-7508, DOI: 10.1080/08827500490441341
  • See references of WO 2014000021A1

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

DOCDB simple family (publication)

WO 2014000021 A1 20140103; AU 2013202214 A1 20140116; AU 2013202214 B2 20160428; EP 2864510 A1 20150429; EP 2864510 A4 20160302; MX 2014016126 A 20150714; PE 20150375 A1 20150325

DOCDB simple family (application)

AU 2013000661 W 20130620; AU 2013202214 A 20130328; EP 13809302 A 20130620; MX 2014016126 A 20130620; PE 2014002545 A 20130620