Method for controlling secondary foam during glass melting

09-09-1997 дата публикации
Номер:
US0005665137A
Автор: Jianzhong Huang
Принадлежит: Owens Corning Fiberglas Technology Inc
Контакты:
Номер заявки: 95-12-5154
Дата заявки: 15-08-1995



A method for controlling secondary foam in a glass melting process is provided in which an oxidizing agent is added to a second melt region (32) of a glass furnace (14) where secondary foam (52) is formed. The oxidizing agent may be supplied directly to the second melt region (32) or may be added to the molten glass composition (46) with the batch raw materials (44) in a first melt region (30). When added directly, the oxidizing agent is preferably an oxidizing gas. When added with the batch materials (44), the oxidizing agent is a high temperature oxidizing agent which is inactive in the first melt region (30) yet active in the second melt region (32).