Optimized process and installation for melting vitrifiable material in a flame fired furnace

摘要

Process for melting vitrifiable material in a flame-fired melting furnace (1), whereby, during a first-high-temperature heat recovery stage, at least one combustion reactant (31, 32) is preheated through indirect heat exchange with the hot flue gas from the furnace (1) and whereby, during a second low-temperature heat recovery stage, the tempered flue gas (21) obtained in the first stage are cleaned and used to heat a working fluid (13) of a Rankine cycle.