title: Factors influencing the Zn and Mn extraction from pyrometallurgical sludge in the steel manufacturing industry.
abstract: In this laboratory study, a process has been developed for selectively leaching zinc and manganese from pyrometallurgical sludge produced in the steel manufacturing industry. In the first part, the yield of Zn extraction was studied using four factors and four levels of the Box-Behnken response surface design. The optimum conditions for the step of Zn leaching were determined to be a sulfuric acid concentration of 0.25 mol/L, a pulp density of 10%, an extraction temperature of 20 °C, and three stages of leaching. Under such conditions, 75% of the Zn should be leached. For Mn leaching, the optimum conditions were determined to be a sulfuric acid concentration of 0.25 mol/L, a Na2S2O5/Mn stoichiometry of 1, a leaching time of 120 min and two leaching steps. In this case, 100% of the Mn should be leached.
authors.affiliation: Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, Canada G1K 9A9. Electronic address: julien.mocellin@ete.inrs.ca.
authors.forename: J
authors.initials: J
authors.lastname: Mocellin
authors.affiliation: Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, Canada G1K 9A9. Electronic address: guy.mercier@ete.inrs.ca.
authors.forename: G
authors.initials: G
authors.lastname: Mercier
authors.affiliation: Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, 2, avenue de la Forêt de Haye, TSA 40602, 54518 Vandoeuvre-lès-Nancy cedex, France. Electronic address: jean-louis.morel@univ-lorraine.fr.
authors.forename: J L
authors.initials: JL
authors.lastname: Morel
authors.affiliation: Institut national de la recherche scientifique (Centre Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, Canada G1K 9A9. Electronic address: jean-francois.blais@ete.inrs.ca.
authors.forename: J F
authors.initials: JF
authors.lastname: Blais
authors.affiliation: Université de Lorraine, Laboratoire Réactions et Génie des Procédés, UMR 7274, 1 rue Grandville, 54001 Nancy cedex, France. Electronic address: marie-odile.simonnot@univ-lorraine.fr.
authors.forename: M O
authors.initials: MO
authors.lastname: Simonnot
mesh_terms: D006801:Humans; D007220:Industrial Waste; D007854:Lead / Q000737:chemistry; D008345:Manganese / Q000737:chemistry; D066192:Manufacturing Industry; D019216:Metals, Heavy / Q000737:chemistry*; D013232:Steel; D018505:Waste Management; D015032:Zinc / Q000737:chemistry
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy; D013232:Steel; D007854:Lead; D008345:Manganese; D015032:Zinc
keywords: Box–Behnken design; Leaching; Manganese; Pyrometallurgical sludge; Steel manufacturing industry; Zinc