Table 3.

Chemical composition of the ore sample by XRF.

Element	O	Si	Al	Fe	K	Ca	Mg	Ti	S	Na
Content (%)	47.77	29.48	10.41	4.28	3.84	1.72	0.81	0.63	0.20	0.25
Element	As	P	Mn	Sb	Cr	Ni	Zr	Rb	Sr	Zn
Content (%)	0.24	0.12	0.07	0.04	0.03	0.03	0.01	0.01	0.01	0.01