Preparation of Portland Cement with Gold Ore Tailings

Table 1

Chemical compositions of raw materials (wt.%).

Materials	Limestone	Bauxite	Iron corrective material	SS	GTs
SiO2	5.70	39.08	55.96	91.64	72.86
Al2O3	1.17	33.77	2.09	3.15	13.68
Fe2O3	0.42	11.13	35.32	1.69	1.11
CaO	48.26	0.85	1.87	0.34	1.06
MgO	2.81	1.34	3.89	0.37	0.08
SO3	0.18	1.47	0.19	0.60	0.16
K2O	0.35	0.25	0.03	0.20	5.32
Na2O	0.10	—	0.03	0.20	3.04
LOI^a	40.87	11.72	0.47	1.11	1.98

^aLoss on ignition at 950°C.