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Riduzione del minerale di manganese egiziano mediante brezza di coke in diverse forme by Hamdy Abd El-Gawad, Hala

Riduzione del minerale di manganese egiziano mediante brezza di coke in diverse forme

by Hala Hamdy Abd El-Gawad , Mohamed El-Menshawi Hussein Shalabi , Naglaa Ahmed
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Book cover type: Paperback
  • ISBN13: 9786207741335
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edizioni Sapienza
  • Publisher Imprint: Edizioni Sapienza
  • Publication Date:
  • Pages: 52
  • Original Price: GBP 30.0
  • Language: Italian
  • Edition: N/A
  • Item Weight: 91 grams
  • BISAC Subject(s): Chemistry / Inorganic

A causa dell'estrazione intensiva di minerali di manganese di alta qualità per lungo tempo, lasciando dietro di sé i minerali di bassa qualità, l'utilizzo di questi ultimi è diventato necessario. Esistono diverse differenze fisico-chimiche tra i componenti dei minerali di manganese, che possono essere utilizzate per l'arricchimento del manganese. In particolare, gli abbondanti minerali di manganese a basso grado, che contengono ossido di ferro, possono essere migliorati mediante preriduzione e separazione magnetica. In questo libro, il minerale di manganese ferruginoso di basso grado è stato preridotto con la brezza di coke come fonte di carbonio sotto forma di bricchette e pellet; la riduzione ha avuto luogo a una temperatura compresa tra 600 e 950 C. Nello studio della cinetica di riduzione, il modello più soddisfacente è stato quello di prendere la pendenza della regione lineare iniziale della curva di riduzione frazionaria rispetto al tempo come misura della costante di velocità (k). I grafici di k vs. 1/T erano rettilinei da cui è stata calcolata l'energia di attivazione.

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