2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
Seven Nobel Laureates have already confirmed their attendance: Prof. Dan Shechtman, Prof. Sir Fraser Stoddart, Prof. Andre Geim, Prof. Thomas Steitz, Prof. Ada Yonath, Prof. Kurt Wüthrich and Prof. Ferid Murad. More than 400 Abstracts Submitted from about 60 Countries.
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    Reduced Environmental Impact and Increased Energy and Material Recovery in the Ferro-alloy Industry Through Staged Combustion of Flue Gas
    Torbjørn Pettersen1; Bernd Wittgens2; Olaf Trygve Berglihn2; Balram Panjwani2; Benjamin Ravary3; Edin Myrhaug4;
    1SINTEF INDUSTRY, 7034 Trondheim, Norway; 2SINTEF, Trondheim, Norway; 3ERAMET NORWAY, Trondheim, Norway; 4ELKEM AS, Trondheim, Norway;
    PAPER: 54/Iron/Plenary (Oral)
    SCHEDULED: 12:35/Tue./Mar Azul (50/1st)



    ABSTRACT:
    The Norwegian ferro-alloy industry is a world leader in sustainable production of ferro-silicon, silicon, and manganese alloys. Even if the industry is currently operating with very low specific energy consumption, there is a considerable amount of energy available in the off-gas from the submerged arc furnaces, both in terms latent heat and unconverted chemical energy. For FeMn production, the off-gas also contains mineral rich particles which are contaminated by tar and polycyclic aromatic hydrocarbon (PAH) components. The dust particles are currently removed from the off-gas and deposited as a wet sludge waste stream. Results from recent experimental validation are presented for a new concept for off-gas processing, which enables an increased energy recovery and can facilitate future material recovery through production of tar and PAH free mineral dust. New results from a techno-economic evaluation of the concept will be presented, including ideas for material recovery from the currently unutilized waste stream. The overall objective is a maximized energy recovery and simultaneously prepare for a comprehensive reduction of waste streams.

    References:
    [1] Y. Ladam, M. Tangstad, and B. Ravary, "Energy mapping of industrial ferroalloy plants", presented at the The thirteenth International Ferroalloys Congress, Almaty, Kazakhstan, 2013, pp. 919-925.
    [2] S. Gaal, M. Tangstad, and B. Ravary, "RECYCLING OF WASTE MATERIALS FROM THE PRODUCTION OF FeMn AND SiMn", presented at the The Twelfth International Ferroalloys Congress Sustainable Future, Helsinki, Finland, 2010.
    [3] B. Wittgens, B. Panjwani, T. Pettersen, R. Jensen, B. Ravary, and D.-O. Hjertenes,"SCORE: Staged Combustion for Energy Recovery in Ferro-alloy Industries - Experimental Validation", Infacon XV Int. Ferro-Alloys Congr., 2018.