根据无碱高铝硼硅酸盐玻璃的黏度-温度曲线确定了澄清温度范围1 630~1 650℃，结合各澄清剂的澄清机理，选定满足该温度范围的SnO₂作为澄清剂，分析了SnO₂的热历史进程，选取了SnO₂最佳添加量；针对现有耐火材料无法长时间满足澄清温度，对澄清段材质进行了研究，选取了铂铑合金；针对铂铑合金的特点，并结合物理澄清理论，分别研究了气泡尺寸、玻璃液黏度对气泡上浮速度的影响，选择提升仓的最佳上倾角度为45~60°；澄清仓的长度为4~5 m等技术参数，为澄清段结构设计提供依据。

According to the viscosity temperature curve of alkali free high alumina borosilicate glass,the clarification temperature is confirmed in the range of 1 630-1 650℃.Combining with the clarification mechanism of clarifiers,SnO₂ is selected as the clarifier.The thermal history of SnO₂ is analyzed,and the optimum adding amount of SnO₂ is settled down.Because the existing refractory materials cannot meet the clarification temperature for long time,clarification materials are studied,and hence platinum rhodium alloy is selected.According to the characteristics of platinum rhodium alloy and combining with the theory of physical clarification,the effects of bubble size and viscosity of molten glass on the buoyancy velocity of bubble are studied.The technical parameters are selected to provide the basis for designing the structure of clarification section:the optimum angle of inclination of the lifting section is 45-60°;the length of the clarification section is 4-5 m.

李青(1965-),女,硕士,教授级高级工程师,主要从事机械设计方面的研究