Research Article
Formation Mechanism of Preferential Flow Paths and Seepage Characteristics of a Novel Growable Pile for Heap Leaching of Rare Earth
Table 1
Particle gradation of the rare earth particles at each observation point after leaching.
| Observation points | Weight percentage (%) | >0.25 mm | >2 mm | 1-2 mm | 0.5–1 mm | 0.25–0.5 mm |
| 1 | 25.39 | 12.78 | 15.88 | 14.63 | 68.70 | 2 | 22.91 | 12.52 | 18.91 | 15.70 | 70.04 | 3 | 25.09 | 13.42 | 17.33 | 16.44 | 72.28 | 4 | 21.01 | 8.68 | 12.24 | 10.75 | 52.69 | 5 | 20.57 | 9.30 | 13.29 | 12.19 | 55.35 | 6 | 22.29 | 9.83 | 14.25 | 13.40 | 59.77 | 7 | 21.53 | 9.23 | 14.47 | 14.08 | 59.31 | 8 | 21.89 | 10.32 | 15.37 | 11.91 | 59.48 | 9 | 23.56 | 14.22 | 17.14 | 16.15 | 71.07 | 10 | 20.42 | 12.12 | 17.71 | 15.33 | 65.58 |
| Observation points | Weight percentage (%) | <0.25 mm | 0.075–0.25 mm | 0.058–0.075 mm | 0.038–0.058 mm | <0.038 mm |
| 1 | 26.94 | 0.17 | 0.00 | 4.19 | 31.30 | 2 | 28.24 | 0.13 | 0.00 | 1.59 | 29.96 | 3 | 23.25 | 0.10 | 0.00 | 4.37 | 27.72 | 4 | 43.66 | 3.22 | 0.15 | 0.28 | 47.31 | 5 | 41.62 | 2.34 | 0.04 | 0.65 | 44.65 | 6 | 38.04 | 1.50 | 0.00 | 0.69 | 40.23 | 7 | 38.53 | 2.07 | 0.09 | 0.00 | 40.69 | 8 | 38.2 | 2.18 | 0.11 | 0.00 | 40.52 | 9 | 26.92 | 0.31 | 0.00 | 1.70 | 28.93 | 10 | 32.68 | 0.43 | 0.04 | 1.26 | 34.42 |
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