Fray Symposium - Use Of Carbon In Pelletising Plant Of Mobarakeh Steel Company
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2011-Sustainable Industrial Processing Summit
SIPS2011 Volume 2: Advanced Sustainable Iron and Steel Making

Editors:Florian K
Publisher:Flogen Star OUTREACH
Publication Year:2012
Pages:708 pages
ISBN:978-0-9879917-1-3
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)

    Use Of Carbon In Pelletising Plant Of Mobarakeh Steel Company

    m.hussein golmakani1; mehdi koshki1; ali saidi2;
    1ISLAMIC AZAD UNIVERSITY, mashhad, Iran; 2ISFAHAN UNIVERSITY, isfahan, Iran;
    Type of Paper: Regular
    Id Paper: 493
    Topic: 5

    Abstract:

    Almost all the palletizing plants in the world which process iron ores containing hematite now add carbon (anthracite, coke breeze or petroleum coke) to the green pellet mixture. The carbon in this solid fuel reduces the hematite to magnetite. When the magnetite produced is re-oxidised in the pelletising process it produces heat inside each pellet. This form of heat transfer inside the pellet is much more efficient than the transfer from hot process gases heated by external burners.This results in higher production rates with lower total energy consumption and with higher effective capacity of the process fans.This technology works particularly well together with the deep pelletising bed practice that is being introduced into MSCo.The benefits from carbon addition is summarised as fallow:1) Increase in production rate of indurations machine (typically 20 % without modification or increase of grate area or process fan capacity.2) Reduced overall energy consumption (natural gas and electricity) of at least 20%3) More uniform firing with less quality difference between pellet at the top and bottom of the bed on the grate.4) Lower temperature in the grate bars, pellet cars and wind boxes (about 90-110 oC).This gives increased life of expensive equipment, lower maintenance cost and less stoppage time for pallet car changes.For Mobarakeh the addition of carbon (less than 0.65 %) to the green pellets has allowed the new required production levels to be more easily achieved and sustained with an overall decrease in operating cost and with more consistent pellet quality.Usage of solid carbon inside the green pellet also has showed increase the production of a further 0.9 Mtpa of pellet for internal use or sale.

    Keywords:

    pelletising. solid carbon, hematite , magnetite, reduction.

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    Cite this article as:

    golmakani m, koshki m, saidi a. Use Of Carbon In Pelletising Plant Of Mobarakeh Steel Company. In: Florian K, editors. Sustainable Industrial Processing Summit SIPS2011 Volume 2: Advanced Sustainable Iron and Steel Making. Volume 2. Montreal(Canada): FLOGEN Star Outreach;2012. p..