Table 2.
The concentration of elements in calcined hematite samples (800–1100 °C), the ratios of elements are normalized for iron content.
| Samples | Concentration of Elements, Atomic Ratios | ||||
|---|---|---|---|---|---|
| CΣ | C(CO3) | OΣ | Fe | Si * | |
| Fe2O3-800 | 1.21 | 0.04 | 1.52 | 1 | 0.08 |
| Fe2O3-900 | 1.77 | 0.13 | 1.82 | 1 | 0.24 |
| Fe2O3-1000 | 2.23 | 0.17 | 2.10 | 1 | 0.21 |
| Fe2O3-1100 | 1.59 | 0.14 | 1.89 | 1 | 0.10 |
* Si is not registered in the sample of the initial hematite reagent, so in the calcined samples, the presence of Si is due to the procedure of grinding sintered samples in the mill to obtain the particle-size fraction.