Use in cement and steel industries. Refractory gunning is composed of refractory aggregates and powders with a certain particle size, binding agent and admixture. According to the material, there are alkaline, aluminum silicate, zirconium-containing and silicon carbide-containing. Refractory gunning mix is mainly used for repairing of steel and non-ferrous metal smelting furnaces and heating furnaces.

| Material | Percentage | Typical |
|---|---|---|
| Al2O3 | 24-27 % | - |
| SiO2 | 40-43 % | - |
| Fe2O3 | 5-8 % | - |
| CaO | 12-15 % | - |