PRERISCALDO DEI FOREHEARTHS E CURVE DI PRERISCALDO Il preriscaldo di tutte le strutture refrattarie è sempre necessario perché i refrattari dilatano con l’aumentare della temperatura; il conseguente aumento di volume deve essere pertanto graduale per evitare rotture. La temperatura d’esercizio all’interno del forno da vetro e nei forehearths potrebbe teoricamente essere raggiunta in brevissimo tempo, […]
FOREHEARTHS PRE-HEATING and PRE-HEATING CURVES All refractory structures have to be preheated before going into operation, since they are subject to a certain thermal expansion, and thus the consequent volume increase must be gradual to avoid any breakage later. The working temperature inside the glass melting tank, as well as in the forehearths could be […]
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Nondestructive testing of forehearth cover blocks
