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2016 | OriginalPaper | Buchkapitel

17. Development of a New Technology for Converting Iron-Bearing Materials to Nodular Reduced Iron for Use in Various Steelmaking Operations

verfasst von : Donald R. Fosnacht, Iwao Iwasaki, Richard F. Kiesel, David J. Englund, Rodney L. Bleifuss, M. E. Mlinar, David W. Hendrickson

Erschienen in: Innovative Process Development in Metallurgical Industry

Verlag: Springer International Publishing

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Abstract

A process for converting iron-bearing raw materials into highly metallized nodular iron was developed in the course of this development (Fosnacht et al. 2010). This product is very similar to iron nuggets produced by other carbothermic processing methods. High-quality Nodular Reduced Iron (NRI) can be routinely produced provided the right choice of temperature profile, atmosphere control, and additives are employed. This chapter will summarize the variety of conditions tested and illustrate the best conditions for reaction mixtures and the use of auxiliary carbon materials that lead to high-quality NRI production. The process development began at the bench scale and proceeded to pilot and demonstration scales. The baseline operating conditions have been established through the work undertaken under pilot plant conditions using a specially designed linear hearth furnace (LHF), with both oxygen-gas and coal-oxygen-based combustion systems. The furnace variables were manipulated to operate under positive pressure, and reducing atmospheres using the stoichiometry of combustion to minimize oxygen content in the furnace atmosphere. A variety of carbon-based reductant materials were tested in the development.

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Literatur
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Metadaten
Titel
Development of a New Technology for Converting Iron-Bearing Materials to Nodular Reduced Iron for Use in Various Steelmaking Operations
verfasst von
Donald R. Fosnacht
Iwao Iwasaki
Richard F. Kiesel
David J. Englund
Rodney L. Bleifuss
M. E. Mlinar
David W. Hendrickson
Copyright-Jahr
2016
DOI
https://doi.org/10.1007/978-3-319-21599-0_17

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