高炉

1. Origins, structure, and basic meaning

• Structure: 高炉 (こうろ) combines high 高 and furnace 炉 to name a blast furnace used in ironmaking.
• Basic usage: It is the large steelworks installation in which iron ore is processed at high temperature.

2. Common pitfalls and similar expressions

• A blast furnace, not any hot oven
  • 高炉 is a specific metallurgical facility and does not refer to every furnace that operates at a high temperature.