vertical retort smelting

例句：

1. 1. The vertical furnace is an essential part of the steelmaking process.
   垂直炉是钢铁生产过程中不可或缺的一部分。
2. 2. In this method, the molten iron is poured into a vertical furnace for smelting.
   在这一方法中，熔融的铁被倒入垂直炉中进行冶炼。
3. 3.The vertical furnace smelting process is highly energy-efficient and environmentally friendly.
   垂直炉炼钢过程非常节能且环保。