Table 1.
Elemental (CHNS) analysis, ash content, total iron content, and volumetric magnetic susceptibility (κ) of the initial samples (lignite and char) and the samples after high-energy ball milling (magnetic lignite and magnetic char).
| Sample | Ad (%) | Cd (%) | Hd (%) | Nd (%) | Sd (%) | Od (%) | FeTotal (%) | κ (SI Units) |
|---|---|---|---|---|---|---|---|---|
| Lignite | 13.8 | 51.9 | 5.4 | 0.8 | 2.3 | 25.8 | - | 89 × 10−6 |
| Char | 21.6 | 62.9 | 3.1 | 1.0 | 2.4 | 9.0 | - | 223 × 10−6 |
| Magnetic lignite | - | 46.7 | 5.4 | 0.7 | 2.0 | - | 7.7 | 343,333 × 10−6 |
| Magnetic char | - | 55.5 | 3.5 | 0.9 | 2.2 | - | 8.5 | 316,897 × 10−6 |
Abbreviations: A, ash; d, dry-weight basis; Od, by difference calculated as 100 − (Ad + Cd + Hd + Nd + Sd).