Exfoliated Graphite Fortified MgO-C Refractories
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 9
Abstract
MgO-C refractories have found the wide range of applicability in basic oxygen furnace, electric arc furnace and in steel ladle, due to good thermal shock resistance and improved slag-corrosion resistance at elevated temperature. The slag penetration and corrosion resistance are improved by the formation of dense layer of MgO on the working surface of MgO-C brick, developed due to oxidation of Mg, which can be produced via the reaction between MgO and carbon. However, carbon suffers from poor oxidation resistance and thus may oxidize to form CO and CO2 resulting in a porous structure with poor strength and corrosion resistance, if this phenomena is not prevented. In this study, reduction of the carbon content while improving the physical and mechanical properties and oxidation resistance of magnesia-carbon refractories. In the present work, we used fabricated exfoliated graphite through microwave treatment as carbon source to replace flaky graphite. In order to study the effect of the replacement on the characteristics of the refractory, the physical and mechanical properties are analysed here in. Magnesia-carbon refractory batches fortified with various fractions of exfoliated graphite have been prepared to understand how the new compositions respond in terms of properties as compared to the available magnesia-carbon refractories. Our aim is to achieve improved properties, along with reduction in carbon burn-out, in the fortified magnesia-carbon refractories.
Authors and Affiliations
Pradeep Ramawat Sadh, Rahul Lodha, Kuldeep Singh, Vandana Singh
Keywords
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