Experimental Research on the Impact of Ion Exchange and Infiltration on the Microstructure of Rare Earth Orebody

Table 2

REO in the leaching process.

Leaching solution	Leaching time/h	REO/10^−6 g/t
H2O	0	649
	1	652
	2	647
	3	657
	4	641
	5	639
	6	650
(NH4)2SO4 (2.5%)	7	630
	8	600
	9	470
	10	290
	11	200
	12	180
	13	178
	14	181