Table 1.

Chemical composition of raw materials (wt.%).

Raw Materials	L.O.I	CaO	SiO2	Al2O3	Fe2O3	SO3	MgO	BaO
limestone	42.63	51.99	1.80	0.51	0.35	/	2.41	/
bauxite	16.01	2.05	16.92	58.58	2.70	/	0.24	/
gypsum	9.67	37.66	0.23	1.42	0.47	45.46	3.53	/
barite	6.45	1.09	2.98	0.88	0.24	27.27	0.39	59.56
tailing sand	2.53	4.00	60.69	3.95	23.06	/	4.20	/