American Journal of Chemical Engineering

Volume 2, Issue 5, September 2014

  • Bauxite Enrichment by Microwave-Magnetising Roasting Using Sawdust as Reducing Agent

    Grace Ofori-Sarpong, Charles Ebenezer Abbey, Richmond Komla Asamoah, Richard Kwasi Amankwah

    Issue: Volume 2, Issue 5, September 2014
    Pages: 59-64
    Received: 8 August 2014
    Accepted: 22 August 2014
    Published: 10 September 2014
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    Abstract: As high grade bauxite is getting depleted in several parts of the world, bauxite with high iron content is becoming increasingly important, and this trend has called for studies into the reduction of iron in bauxite. This study investigated the use of microwave energy in the magnetising roasting of high-iron bauxite using sawdust as reducing agent.... Show More
  • Numerical Investigation of Heat Transfer in 4-Pass Fire-Tube Boiler

    Ahmed Rahmani, Soumia Trabelsi

    Issue: Volume 2, Issue 5, September 2014
    Pages: 65-70
    Received: 7 September 2014
    Accepted: 15 September 2014
    Published: 30 September 2014
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    Abstract: In this paper, the heat transfer in 4-pass 500HP fire-tube steam boiler is numerically investigated. A calculation program is carried out in order to simulate the heat transfer characteristics between the hot gases and the boiler tube internal walls. Especially, the heat flux densities and the corresponding wall temperatures for different operating... Show More