blast furnace lump ore

例句：

1. 1.The blast furnace is the heart of the ironmaking process.
   高炉是炼铁过程的核心。
2. 2.The blast furnace is responsible for converting iron ore into iron.
   高炉负责将铁矿石转化为铁。
3. 3. The blast furnace is a complex machine that requires skilled maintenance.
   高炉是一个复杂的机器，需要熟练的维护。