RESEARCH ON THE CARBOTHERMIC REDUCTION CONDITIONS OF MILL SCALE FROM CONTINOUS CASTING PROCESSES


Demirci F. C. , Yücel O.

TMS 140th Annual Meeting and Exhibition, California, United States Of America, 27 February - 03 March 2011, pp.651-659 identifier

  • Publication Type: Conference Paper / Full Text
  • City: California
  • Country: United States Of America
  • Page Numbers: pp.651-659

Abstract

This study concerns itself with the carbothermic reduction of mill scale, which is an iron oxide layer that forms on the surface of materials subjected to hot rolling or continuous casting. The mill scale is pelletized before undergoing reduction in a rotary kiln. The final product is direct reduced iron pellets with different amounts of metallic iron. Chemical and XRD (X-Ray Diffraction) analyses are carried out on samples obtained at different periods of time during the reaction. The effect of temperature, reductant type and amount of reductant is investigated by comparing the results reached by performing experiments with different parameters. Metallization degree, which is the ratio of metallic iron to total iron, and phase structure of the samples provide the necessary data to determine the effect of the parameters. It was found out that different types of reductant offered different temperature and stoichiometry dependency with regards to the reduction potential they provide.