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The mineral compositions (wt.%) of red mud sampled in this study.
| Mineral | Formula | HN-A | SD-A | GX-A | GX-B | SD-B |
|---|---|---|---|---|---|---|
| Quartz | SiO2 | 10 | 10 | - | 10 | |
| Calcite | CaCO3 | - | 20 | 10 | 10 | - |
| Dolomite | CaMg(CO3)2 | - | - | - | - | - |
| Hematite | Fe2O3 | 20 | 40 | 35 | 35 | 50 |
| Hydrogarnet | Ca3Al2(SiO4)2(OH)4 | 40 | - | 30 | 30 | - |
| Sodalite | Na8(Al6Si6O24)Cl2 | 30 | 20 | - | 25 | - |
| Anhydrite | CaSO4 | - | 10 | - | - | - |
| Cancrinite | Na6Ca2((CO3)2Al6Si6O24)·2H2O | - | - | 25 | - | - |
| Gibbsite | Al(OH)3 | - | - | - | - | 40 |
