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High‐Temperature Chemistry of Glass Furnace Atmospheres
Author(s) -
WILLIAMS ROBIN O.,
PASTO ARVID E.
Publication year - 1982
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1982.tb09937.x
Subject(s) - glass furnace , chemistry , metallurgy , mineralogy , chemical engineering , materials science , engineering
The chemical nature of species in glassmelting furnace exhaust streams was thermodynamically analyzed using a computer program. These analyses indicate that the primary material which will condense out of such atmospheres is liquid sodium sulfate. It is postulated that the amount of sodium is controlled by equilibrium between the bath and the atmosphere. Given this assumption, higher sulfur contents decrease the sodium content, and higher chlorine increases the sodium content. Variations in the hydrogen‐to‐carbon ratio caused by using different fuels have only a modest effect on the condensation. Potassium behaves similarly to sodium but condenses at a somewhat lower temperature. It is believed that entrained dust particles serve as nucleation sites. The CaO and MgO particles derived from batch carryover and spalled refractories can be converted to the sulfate and dissolved in the liquid sodium sulfate, whereas the simultaneous presence of SiO 2 can lead to a glasslike oxide mixture.