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1. (WO2016178040) METHOD FOR THE TREATMENT OF IRON-CONTAINING SLUDGE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2016/178040    International Application No.:    PCT/IB2015/000617
Publication Date: 10.11.2016 International Filing Date: 05.05.2015
IPC:
C22B 7/00 (2006.01), C22B 13/00 (2006.01), C22B 3/00 (2006.01)
Applicants: ARCELORMITTAL [LU/LU]; 24-26 Boulevard d'Avranches L-1160 Luxembourg (LU)
Inventors: GIORDANA, Séverine; (FR)
Agent: PLAISANT, Sophie; ArcelorMittal France Research & Development Intellectual Property 6, rue Campra - Immeuble Le Cézanne F-93200 Saint-Denis (FR)
Priority Data:
Title (EN) METHOD FOR THE TREATMENT OF IRON-CONTAINING SLUDGE
(FR) PROCÉDÉ DE TRAITEMENT DE BOUES CONTENANT DU FER
Abstract: front page image
(EN)The invention is related to a method for the treatment of sludge containing iron and between 4.5% to 12% by weight of zinc. This method includes a leaching step wherein leaching agents include hydrochloric acid and chlorate, and wherein the pH of the leachate directly resulting from this leaching step is set at a value strictly below 1.5. Recycling method and treatment installation associated.
(FR)Cette invention concerne un procédé de traitement de boues contenant du fer et de 4,5 à 12 % en poids de zinc. Ledit procédé comprend une étape de lixiviation mettant en œuvre des agents de lixiviation comprenant de l'acide chlorhydrique et du chlorate, et le pH du lixiviat résultant directement de cette étape de lixiviation est réglé à une valeur strictement inférieure à 1,5. L'invention concerne en outre un procédé de recyclage et une installation de traitement associée.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)