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应用Application：
放置于二段转化炉顶部用于对二段转化催化剂的热保护，以防高温和气流冲
刷；It is used in the top part of the secondary reformer of the large and medium sized ammonia plants as a thermal shield for SRC to resist high temperature and gas impingement.Its performance is well adapted to the specific operating environment and conditions in the top of the secondary reformer. 

技术性能指标Technical Performance Index：
规格（mm）：25×17×9瓦灰色环状 ；/堆密度Kg/L 1.10～1.15 ；
抗压强度 ≥400 N/P ; /操作压力Kg/cm² G 80～250 ；
操作温度℃ 650～850 ；/空速h－1  ～10000