[13] [13] ZHU X B, LI W, ZHAO H, et al. Selective dealkalization of red mud using calcium oxide with pressure leaching［J］. JOM, 2018, 70(12): 2800-2806.

[21] [21] MAHANDRA H, GHAHREMAN A. A sustainable process for selective recovery of lithium as lithium phosphate from spent LiFePO4 batteries［J］. Resources, Conservation and Recycling, 2021, 175: 105883.