refractory seal

The author describes the fluidized bed calciner cooler in the Alcoa process AlFs3 technology developed by American Aluminum Industry Corporation,points out the drawbacks of the sealing structure,and proposes using the new structure with compressed air for high temperature sealing,a revamping measure based.

国内大型湿法磷酸装置设计的副产氟硅酸几乎多用于生产AlF3 ,介绍美国铝业公司开发的Alcoa流程生产AlF3 技术中的流化床煅烧冷却器 ,指出其密封结构的不足之处 ,提出在原结构基础上改用压缩空气进行高温密封的新结构 ,改造费用很少。