Aluminate can be attained largely after adding Al2O3 into the desufurizing system, so the free CaO is reduced effectively and C4A3S- was promoted to form in the residues. Yet aluminate can be totally transformed into C4A3S- only in a higher Ca/S ratio.

• 以Al_2O_3为添加剂，会形成较多的铝酸盐，有效降低体系中f-CaO的含量，促进C_4A_3S~-形成，但铝酸盐仅在高钙硫比下才能全部转化为C_4A_3S~-。