The systemprocess,equipmentcomposition,designcalculationandsystemarrange-ment of converter afterheat steam used as steam source for vacuum treatme nt were presented.

• 阐述了转炉余热蒸汽作为真空处理汽源的系统流程、设备组成、设计计算、系统布置、以及与其它供汽系统相比较的优点。