Research on Enrichment of P₂O₅ from Low-Grade Carbonaceous Phosphate Ore via Organic Acid Solution

Table 3

The leaching results of three kinds of organic acids at different acid concentrations.

Acid concentration (%)	Acid type
	Grade of P2O5 (%)
	Citric acid	Lactic acid	Acetic acid
1	17.72	18.94	23.46
3	20.66	22.87	27.34
5	23.58	24.14	33.78
7	25.46	28.42	32.62
9	27.36	28.88	28.22