Low-alkali sulpho-aluminate cement calcined by using refuse incineration flyash and preparation thereof

The invention belongs to the new material and environmental protection technical field, in particular relating to low-alkali sulphoaluminate cement produced by utilizing waste incineration fly ash and a method for preparing the same. The cement consists of the waste incineration fly ash, low-grade alumyte, desulfurization gypsum, pulverized fuel ash and limestone, wherein, the waste incineration fly ash is 15 to 42 weight percent; the low-grade alumyte is 20 to 30 weight percent, the desulfurization gypsum is 15 to 20 weight percent, and the balance is the limestone and the pulverized fuel ash the amount of which is determined by material proportion and meets the 100 percent total weight. The method comprises the following steps that: the waste incineration fly ash, the low-grade alumyte, the desulfurization gypsum, the pulverized fuel ash and the limestone are mixed and milled according to weight and pressed into a pat; the pat is put into a silicon carbide furnace and the temperature increases to between 1200 and 1230 DEG at a speed of 0.5-0.8 DEG C per second, the pat is kept in the temperature for 50 to 70 minutes and then taken out for sharp quenching to the room temperature, and sulphoaluminate cement clinker is obtained; the sulphoaluminate cement clinker is milled to 400 +- 10 m<2> / kg, and the cement is obtained. The low-alkali sulphoaluminate cement can not only reduce the production cost of the cement clinker, but also effectively lighten the energy consumption and relieve the strain of resources, thereby the cement is a novel environment-friendly building material, and has good economic and social benefits and important meaning for energy conservation and emission reduction.