Volume 4, Issue 3 (Summer &Autumn 2007 2007)
IJMSE 2007, 4(3): 28-38 |
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A. Ahmadi,, H. Sarpoolaky,, A. Mirhabibi, F. Golestani-fard. THE EFFECT OF GRAPHITE ADDITION ON CORROSION BEHAVIOR OF TAR BONDED DOLOMITE REFRACTORIES IN STEELMAKING CONVERTER. IJMSE 2007; 4 (3) :28-38
URL: http://ijmse.iust.ac.ir/article-1-121-en.html
URL: http://ijmse.iust.ac.ir/article-1-121-en.html
Abstract: (36924 Views)
Abstract: Dolomite based refractories are widely used in Iranian steelmaking plants. In the
present research, wear and corrosion of refractories used in steel-making converter lining in
Esfahan Steel Company was studied. Post-mortem analysis of refractories clarified that the wear
started with oxidation of carbon followed by chemical corrosion. Iron oxide from slag reacted with
calcia, resulting in formation of low melting phase, and subsequent washout process, caused the
refractory corrosion onset from the hot face. In addition, the effect of aluminum as an anti-oxidant
and graphite on the corrosion resistance of refractory was investigated. Tar-dolomite samples
containing different amount of graphite (0, 4, 7, and 10 wt. %) were prepared in order to study
their physical properties, before and after coking. SEM micrographs employed to analyze the
microstructures to determine the effect of graphite and antioxidant on corrosion behavior of the
refractory. Results showed that oxidation process of carbon in the system was hindered and
improved corrosion resistance by introducing graphite and antioxidant into the refractory
composition.
Type of Study: Research Paper |
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