Metallurgical and Materials Transactions B

, Volume 44, Issue 6, pp 1390–1397 | Cite as

Influence of CaO-SiO2-Al2O3 Ternary Oxide System on the Reduction Behavior of Carbon Composite Pellet: Part II. Morphological Properties

Article

Abstract

Carbon composite pellets composed of hematite, synthetic graphite, and oxide system were reduced at 1773 K (1500 °C) in a laboratory-scale horizontal tube furnace. The morphological properties of produced pellets after reduction were examined using light optical microscopy and a scanning electron microscope. Microscopic observation confirmed the correlation between morphological change of pellets and compositional difference of CaO-SiO2-Al2O3 ternary oxide systems. Samples were also analyzed by X-ray diffraction to investigate phase change during the reduction process. The impact of oxide chemistry was established as each pellet illustrated different states of iron oxide as a function of time. In addition, the surface area was measured by the BET-N2 absorption method to clarify the reaction mechanism which is significantly affected by physical contact.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2013

Authors and Affiliations

  1. 1.School of Materials Science and Engineering, Centre for Sustainable Materials Research & Technology (SMaRT)University of New South WalesSydneyAustralia

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