Orthogonal Experimental Studies on Preparation of Mine-Filling Materials from Carbide Slag, Granulated Blast-Furnace Slag, Fly Ash, and Flue-Gas Desulphurisation Gypsum

Table 1

Chemical compositions of raw materials (in wt.%).

Raw materials	Loss on ignition	Silicon dioxide	Aluminium oxide	Iron(III) oxide	Calcium oxide	Magnesium oxide	Sulphur trioxide
Fly ash	4.22	45.98	31.79	6.18	3.67	0.90	0.70
Carbide slag	1.7	3.16	2.72	0.42	64.57	0.72	1.52
GBFS	0.25	30.13	17.14	0.71	38.83	7.38	0.59