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