Thermochemistry Of The Glass Melting Process - Energy Requirement In Melting Soda-Lime-Silica Glasses From Cullet-Containing Batches

The theoretical energy requirement in melting flat and container glasses of the soda-lime-silica type from corresponding batches was directly measured at temperatures from 1370 to 1700K using the drop-mixing method. In addition, the energy to be expended in heating the aforementioned glasses, as well as calumite and ecomelt, from ambient temperture into the range from 1080 to 1700K was determined using transposed-temperature drop calorimetry. Guided by the results, thermochemical methods proposed in the literature for the estimation of the theoretical energy demand are critically assessed.