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Traitement Et Valorisation de Rejets Miniers

Traitement Et Valorisation de Rejets Miniers

          
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About the Book

Ce travail porte sur la valorisation de déchets miniers provenant de deux gisements de natures et de régions différentes: gisement de pyrolusite d'Imini et les terrils des charbonnages de Jerada. Lors de cette étude, différentes techniques et procédés minéralurgique ont été utilisées. L'hydrométallurgie est la première technique appliquée au gisement de pyrolusite où un échantillon représentatif contenant 55% en MnO2 a été lixivié en milieu acide. Cette opération s'est déroulée à 70°C avec un rapport S/L de 90g/l. Ces conditions ont permis d'atteindre un taux de lixiviation de 98% en Mn(II). La solution est conditionnée à un pH 5 avant d'ajouter le NaClO qui oxyde le Mn(II) en différentes phases. Ces oxydes ont subi une dismutation par le HNO3 pour aboutir enfin à la variété α-MnO2 avec une pureté de 97%.Par ailleurs, les terrils abandonnés de l'ancienne mine de charbon de Jerada ont fortement évolué, en particulier la pyrite contenue s'est oxydée. Les opérations suivantes: criblage, élutriation et flottation ont permis d'obtenir un produit marchand qui titre 35% en oxyde de fer utilisable en peinture, émaillage et bioconstruction.


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Product Details
  • ISBN-13: 9786131545634
  • Publisher: Omniscriptum
  • Publisher Imprint: Omniscriptum
  • Height: 229 mm
  • No of Pages: 126
  • Series Title: Omn.Univ.Europ.
  • Weight: 195 gr
  • ISBN-10: 6131545634
  • Publisher Date: 28 Feb 2018
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Spine Width: 8 mm
  • Width: 152 mm


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