Shaft kiln bauxite, the bauxite calcined by shaft kiln. The raw material – bauxite ore is loaded from the top of the kiln and coal powder and combustion improver; the fire of calcination comes from the kiln bottom, about 1300-1400 degrees. After the complete calcination, the bauxite is carried out from the bottom. Comparing with rotary kiln, the sample shaft kiln can save many costs and produce similar bauxite, so it is popular with most producers.
Specification for Shaft kiln bauxite
| Item name | Al2O3 % min | SiO2 % max | Fe2O3 % max | TiO2 % max | K2O+Na2O % | CaO+MgO % | B.D gm/cc min | Moisture % max | Package |
| SKB-80 | 80 | 13-14 | 2.5 | 4.2 | 0.8 | 0.6 | 2.7 | 0.5 | Jumbo |
| SKB-83 | 83 | 11 | 2.2 | 4.2 | 0.7 | 0.5 | 2.75 | 0.5 | Jumbo |
| SKB-84 | 84 | 10 | 2 | 4 | 0.6 | 0.5 | 2.8 | 0.5 | Jumbo |
| SKB-85 | 85 | 9 | 2 | 4 | 0.5 | 0.5 | 2.85 | 0.5 | Jumbo |
| SKB-86 | 86 | 8 | 2 | 3.8 | 0.4 | 0.5 | 3 | 0.5 | Jumbo |
