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

Table 7

Spectral analysis of phosphate rock after citric acid leaching.

Content (%)	Element
	C	O	Mg	P	Ca
1 wt.	8.40	20.60	0.37	18.45	52.17
2 wt.	18.41	33.82	10.26	—	37.51
3 wt.	—	23.45	—	20.74	55.80
4 wt.	9.64	38.62	12.02	—	39.71
5 wt.	19.97	44.53	15.77	—	19.72
6 wt.	27.50	34.10	—	24.24	14.15