中文摘要：

铸造熔炉是铸造过程中的关键设备之一，并且铸造熔炉燃烧过程的完全与否将决定着铸造质量的好坏。基于PLC可编程序控制器设计了锅炉燃烧过程的自动控制系统，设计过程中主要考虑蒸汽压力、燃烧过程含氧量和炉膛负压三个变量，并分别基于以上三个变量进行控制系统硬件和软件设计，并且给出具体的控制方案，对铸造熔炉燃烧的自动控制系统的设计与研究起着重要作用。

英文摘要：

Casting furnace is one of the key equipments in casting process,and its combustion process determines the quality of the casting.A PLC-based automatic control system of boiler combustion process was designed.Steam pressure,oxygen content and combustion chamber negative pressure in combustion process are considered in design process.On the basis of theabove three variables,the hardware and software of the control system were designed.The specific control scheme is given,which plays an important guiding significance for the design and research of the combustion automatic control system of castingfurnace.