Aggregate Evolution Mechanism during Ion-Adsorption Rare Earth Ore Leaching

Table 3

Physical parameters and porosity distributions of the samples.

Frequency	Sample height (mm)					Volume (mm^3)	Porosity (%)
	Test 1	Test 2	Test 3	Test 4	Average value		Test 1	Test 2	Test 3	Average value
(a) Pure water leaching test group
0	59	59	60	60	59.5	74.732	45.116	45.443	45.437	45.332
1	59	60	59	60	59.5	74.732	45.683	45.653	45.663	45.666
2	59	59	60	60	59.5	74.732	45.880	45.783	45.764	45.809
3	59	59	60	60	59.5	74.732	45.653	45.862	45.443	45.652
4	59	59	60	60	59.5	74.732	45.880	46.081	46.153	46.038
5	59	59	60	60	59.5	74.732	46.235	45.879	46.545	46.230
6	59	59	60	60	59.5	74.732	46.503	45.667	46.259	46.143
(b) Ammonium chloride leaching test group
0	58	59	59	58	58.5	73.476	45.258	45.392	45.267	45.305
1	59	60	58	59	59	74.104	45.919	45.880	46.004	45.934
2	58	60	59	59	59	74.104	47.458	47.562	47.498	47.506
3	59	59	59	59	59	74.104	48.767	48.971	48.908	48.882
4	58	60	59	59	59	74.104	49.711	49.906	49.011	49.542
5	59	60	59	58	59	74.104	49.968	49.083	49.784	49.612
6	59	60	59	58	59	74.104	49.544	49.899	49.568	49.670