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Réduction du minerai de manganèse égyptien par la brise de coke sous différentes formes by Hala Hamdy Abd El-Gawad

Réduction du minerai de manganèse égyptien par la brise de coke sous différentes formes

by Hala Hamdy Abd El-Gawad , Mohamed El-Menshawi Hussein Shalabi , Naglaa Ahmed
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Book cover type: Paperback
  • ISBN13: 9786207741342
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Editions Notre Savoir
  • Publisher Imprint: Editions Notre Savoir
  • Publication Date:
  • Pages: 52
  • Original Price: GBP 30.0
  • Language: French
  • Edition: N/A
  • Item Weight: 91 grams
  • BISAC Subject(s): Chemistry / Inorganic

En raison de l'exploitation intensive des minerais de manganèse à haute teneur pendant une longue période et de l'abandon des minerais à faible teneur, l'utilisation de ces derniers est devenue nécessaire. Il existe plusieurs différences physico-chimiques entre les composants des minerais de manganèse, qui peuvent être utilisées pour l'enrichissement du manganèse. En particulier, les minerais de manganèse abondants à faible teneur, qui contiennent de l'oxyde de fer, peuvent être valorisés par pré-réduction et séparation magnétique. Dans cet ouvrage, le minerai de manganèse ferrugineux à faible teneur a été pré-réduit par de la brise de coke comme source de carbone sous forme de briquettes et de pastilles; la réduction a lieu à une température comprise entre 600 et 950 C. Dans l'étude de la cinétique de réduction, le modèle le plus satisfaisant a consisté à prendre la pente de la région linéaire initiale de la courbe de réduction fractionnelle en fonction du temps comme mesure de la constante de vitesse (k). Dans les tracés de k en fonction de 1/T, il y avait une ligne droite à partir de laquelle l'énergie d'activation a été calculée.

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