What is the job of the oven door worker?

Engaged in metal smelting. Knockers are engaged in metal smelting. They are responsible for charging, melting and adjusting the atmosphere in high-temperature furnaces such as steelmaking furnaces and ironmaking furnaces to ensure the smooth progress of metal smelting. This job requires professional knowledge and skills, and has a deep understanding of the metal smelting process in the furnace. In China, this profession usually belongs to industries such as steel and metallurgy.