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Thermal spelling: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling can be decreased by minimizing the development of internal stress by:
(1) Using refractory with high porosity, good thermal conductivity and low coefficient of expansion.
(2) Avoiding sudden temperature changes.
(3) Proper furnace design
Requisites of refractory material or essential requirements of good refractory: a. It should be able to withstand high temperature. The appropriate refractory is chose
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INTRODUCTION : This exercise is based on here of this course where you were introduced to For Mode-1 Students the essential features of a good preparation room that offers service
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