Chemical composition | Sample | ||||
S1 (%) | S2 (%) | S3 (%) | S4 (%) | S5 (%) | |
Al2O3 | 97.2 | 96.5 | 96.4 | 92.3 | 89.6 |
SO3 | 2.05 | 2.16 | 2.19 | 4.69 | 5.28 |
SiO2 | 0.51 | 0.64 | 1.02 | 1.65 | 2.96 |
MgO | - | 0.16 | 0.12 | 0.13 | 0.29 |
CaO | 0.03 | 0.29 | 0.13 | 0.27 | 0.56 |
Fe2O3 | 0.04 | 0.04 | 0.03 | 0.04 | 0.03 |
Other | 0.17 | 0.21 | 0.11 | 0.92 | 1.28 |