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Leaching of pyrolusite using molasses alcohol wastewater as a reductant / Haifeng Su in Minerals engineering, Vol. 22 N° 2 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 207–209 Titre : Leaching of pyrolusite using molasses alcohol wastewater as a reductant Type de document : texte imprimé Auteurs : Haifeng Su, Auteur ; Yanxuan Wen, Auteur ; Fan Wang, Auteur Année de publication : 2009 Article en page(s) : pp. 207–209 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Pyrolusite  Molasses  alcohol  wastewater  Sulfuric  acid  leaching  Reductive  leaching Index. décimale : 622 Industrie minière Résumé : Extraction of manganese from a pyrolusite ore was investigated using molasses alcohol wastewater as a reducing agent in dilute sulfuric acid medium. The effects of molasses alcohol wastewater dosage, concentration of sulfuric acid, leaching temperature and reaction time were studied. High manganese recovery, coupled with relatively low Fe and Al extraction yields, was obtained with this leaching process. The optimal leaching conditions were obtained using 1.9 mol/L H2SO4 and 2.0 mL/g ratio of molasses alcohol wastewater to pyrolusite for 120 min at 90 °C. These conditions resulted in leaching yields of 93% for Mn, with relatively low recoveries of 37% for Fe and 25% for Al. These results demonstrate that molasses alcohol wastewater is a low cost resource, containing renewable and non-hazardous reducing agents (when compared to other available reagents) that can be used for manganese leaching under mild acidic conditions. In short, the method provides a good extraction yield while making an economically productive use of molasses alcohol wastewa DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001398 [article] Leaching of pyrolusite using molasses alcohol wastewater as a reductant [texte imprimé] / Haifeng Su, Auteur ; Yanxuan Wen, Auteur ; Fan Wang, Auteur . - 2009 . - pp. 207–209. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 207–209 Mots-clés : Pyrolusite  Molasses  alcohol  wastewater  Sulfuric  acid  leaching  Reductive  leaching Index. décimale : 622 Industrie minière Résumé : Extraction of manganese from a pyrolusite ore was investigated using molasses alcohol wastewater as a reducing agent in dilute sulfuric acid medium. The effects of molasses alcohol wastewater dosage, concentration of sulfuric acid, leaching temperature and reaction time were studied. High manganese recovery, coupled with relatively low Fe and Al extraction yields, was obtained with this leaching process. The optimal leaching conditions were obtained using 1.9 mol/L H2SO4 and 2.0 mL/g ratio of molasses alcohol wastewater to pyrolusite for 120 min at 90 °C. These conditions resulted in leaching yields of 93% for Mn, with relatively low recoveries of 37% for Fe and 25% for Al. These results demonstrate that molasses alcohol wastewater is a low cost resource, containing renewable and non-hazardous reducing agents (when compared to other available reagents) that can be used for manganese leaching under mild acidic conditions. In short, the method provides a good extraction yield while making an economically productive use of molasses alcohol wastewa DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001398