DC ladle furnace

例句：

1. 1.This DC ladle furnace is used for melting refractory metals.
   这个直流钢包炉用于熔化耐火金属。
2. 2.The DC ladle furnace is a crucial component in the steelmaking process.
   直流钢包炉是钢铁生产过程中至关重要的组成部分。
3. 3.The DC ladle furnace has been widely used in various industries due to its high efficiency and low energy consumption.
   由于其高效率和低能耗，直流钢包炉在各行业得到了广泛应用。