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1  I  

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Volume  2016  I   Issue  1

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  Das, P. ; BasuMallick, S. ; Maity, P. ; Palit, S. ; Ghosh, S. ; Mukhopadhyay, Sunanda
Evaluation of Refractory Performance of Basic Castables Containing Magnesium-Aluminate Sol-Gel Coatings on Graphite
Refractories Manual (2016) 41-46
Review Papers


Abstract:
A study was conducted to compare the properties of carbon-containing basic castables that incorporated graphite with and without a magnesium aluminate sol-gel coating. A thin sol-gel coating of magnesium aluminate spinel was prepared from inexpensive precursors. The castable batch containing hydrophilic coated graphite required less water (9.5 mass-%) for mixing than the uncoated graphie (12.5 mass-%). Basic castable containing coated graphite showed better retention of graphite inside its refractory matrix. Consequently, slag corrosion and penetration resistance were noticeably improved in the coated graphite sample. X-ray diffraction, scanning electron microscopy and investigation of physical properties were performed on the castables at different temperatures to confirm the benefits of spinel-coated graphite.

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