1. The inner refractory lining serves as sacrificial layer to protect the kiln structure.

2. Blast furnace body mainly includes internal lining refractory, lining methods and lining cooling methods.

3. Particular attention is paid to the effects on the refractory lining of the rotary kiln plant.

4. Before this invention, the converter was a cylindrical barrel, lined with an acid refractory lining, made of sand and clay.