| 摘要 |
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date W O 2014/000021 Al 3 January 2014 (03.01.2014) WI P 0 1 P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every C22B 3/04 (2006.01) C22B 19/20 (2006.01) kind <f national protection available): AE, AG, AL, AM, C22B 3/14 (2006.01) C22B 19/32 (2006.01) AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, (21) International Application Number: DO, DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, PCT/AU2O 13/00066 1 HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, (22) International Filing Date: KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, 20 June 2013 (20.06.2013) MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, (25) Filing Language: English SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, (26) Publication Language: English TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: (84) Designated States (unless otherwise indicated, for every 2012902708 26 June 2012 (26.06.2012) AU kind f regional protection available): ARIPO (BW, GH, 2013202214 28 March 2013 (28.03.2013) AU GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, (71) Applicant: METALEACH LIMITED [GB/GB]; Akara TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, Building, 24 De Castro Street, Tortola, 1110 (VG). EE, ES, Fl, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, (72) Inventors; and MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (71) Applicants : SUTCLIFFE, Matthew Leslie [GB/GB]- TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 83D Gloucester St, England, Greater London SW1V4EB KM, ML, MR, NE, SN, TD, TG). (GB). WELHAM, Nicholas James [GB/AU]; 2 Fairway Published: Court, Invermay Park, Ballarat, Victoria 3350 (AU). JOHNSTON, Garry Mervyn [AU/AU]; 74 Bayview Ter- with international search report (Art. 21(3)) race, Claremont, Western Australia 6010 (AU). (74) Agent: WRAYS; 56 Ord Street, West Perth, Western Aus tralia 6005 (AU). (54) Title: METHOD FOR LEACHING ZINC SILICATE ORES weak acid solution Ore- 1 3 -heap 5 solvent 7 zinc 9 zinc product or cure leach extraction recovery 0 tailings 8 (57) Abstract: In accordance with the present invention there is provided a method for leaching zinc from an ore, the method com O prising 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 0 containing free ammonia, producing a pregnant leach solution; and passing the pregnant leach solution to a means for zinc recovery. |
