发明名称 AGGLOMERATED ELEMENTS FOR VITRIFIABLE MIXTURES, PROCESS FOR THEIR MANUFACTURE AND THEIR USE
摘要 Refining agents comprising intimate mixtures of finely-divided sulfates and reducing agents are added to vitrifiable charges of glassmaking raw materials prior to melting the raw materials so that, when the charge is melted, the refining agent will evolve bubbles of sulfur dioxide gas which will remove smaller bubbles of other gases from the molten glass as these bubbles rise to the surface of the molten glass. The metal sulfates and reducing agents (preferably carbon) employed in the refining agent have a particle size of less than about 0.1 mm and are formed into homogeneous agglomerates having a size of about 1 to 5 mm. The glassmaking raw materials are also finely-divided and may be used in this form or may be formed into agglomerates of about the same size as, or containing the agglomerated refining agent. The relative amounts of reducing agent to sulfur in the refining agent is such that at least one-fourth of the sulfate present will be reduced to the sulfide form, and the amount of refining agent employed is such that the amount of added sulfur expressed as SO3 is at least 0.05% by weight of the glass to be obtained.
申请公布号 DE3066139(D1) 申请公布日期 1984.02.23
申请号 DE19803066139 申请日期 1980.05.14
申请人 SAINT-GOBAIN EMBALLAGE 发明人 BARTON, JAMES LEONARD
分类号 C03C1/00;C03C1/02;(IPC1-7):C03C1/02;C03B5/22;C03C1/10 主分类号 C03C1/00
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