Title:
METHOD FOR THE TREATMENT OF IRON-CONTAINING SLUDGE
Document Type and Number:
WIPO Patent Application WO/2016/178073
Kind Code:
A3
Abstract:
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.
Inventors:
GIORDANA SÉVERINE (FR)
Application Number:
PCT/IB2016/000578
Publication Date:
March 16, 2017
Filing Date:
May 04, 2016
Export Citation:
Assignee:
ARCELORMITTAL (LU)
International Classes:
C22B7/00; C22B3/00; C22B13/00
Foreign References:
| US4025430A | 1977-05-24 |
Other References:
UCAR ET AL: "Kinetics of sphalerite dissolution by sodium chlorate in hydrochloric acid", HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 95, no. 1-2, 1 January 2009 (2009-01-01), pages 39 - 43, XP025717120, ISSN: 0304-386X, [retrieved on 20080422], DOI: 10.1016/J.HYDROMET.2008.04.008
CLAASSEN J O ET AL: "Iron precipitation from zinc-rich solutions: defining the Zincor Process", HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 67, no. 1-3, 1 December 2002 (2002-12-01), pages 87 - 108, XP004393579, ISSN: 0304-386X, DOI: 10.1016/S0304-386X(02)00141-X
J F BLAIS ET AL: "Metals Precipitation from Effluents: Review", 1 January 2008 (2008-01-01), XP055238615, Retrieved from the Internet [retrieved on 20160105], DOI: 10.1061/ASCE1090-025X200812:3135
JHA M K ET AL: "Review of hydrometallurgical recovery of zinc from industrial wastes", RESOURCES CONSERVATION AND RECYCLING, ELSEVIER SCIENCE PUBLISHER, AMSTERDAM, NL, vol. 33, no. 1, 1 August 2001 (2001-08-01), pages 1 - 22, XP004246483, ISSN: 0921-3449, DOI: 10.1016/S0921-3449(00)00095-1
BALTPURVINS K A ET AL: "Effect of electrolyte composition on zinc hydroxide precipitation by lime", WATER RESEARCH, ELSEVIER, AMSTERDAM, NL, vol. 31, no. 5, 1 May 1997 (1997-05-01), pages 973 - 980, XP004058634, ISSN: 0043-1354, DOI: 10.1016/S0043-1354(96)00327-2
CLAASSEN J O ET AL: "Iron precipitation from zinc-rich solutions: defining the Zincor Process", HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 67, no. 1-3, 1 December 2002 (2002-12-01), pages 87 - 108, XP004393579, ISSN: 0304-386X, DOI: 10.1016/S0304-386X(02)00141-X
J F BLAIS ET AL: "Metals Precipitation from Effluents: Review", 1 January 2008 (2008-01-01), XP055238615, Retrieved from the Internet
JHA M K ET AL: "Review of hydrometallurgical recovery of zinc from industrial wastes", RESOURCES CONSERVATION AND RECYCLING, ELSEVIER SCIENCE PUBLISHER, AMSTERDAM, NL, vol. 33, no. 1, 1 August 2001 (2001-08-01), pages 1 - 22, XP004246483, ISSN: 0921-3449, DOI: 10.1016/S0921-3449(00)00095-1
BALTPURVINS K A ET AL: "Effect of electrolyte composition on zinc hydroxide precipitation by lime", WATER RESEARCH, ELSEVIER, AMSTERDAM, NL, vol. 31, no. 5, 1 May 1997 (1997-05-01), pages 973 - 980, XP004058634, ISSN: 0043-1354, DOI: 10.1016/S0043-1354(96)00327-2
Attorney, Agent or Firm:
PLAISANT, Sophie (FR)
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