Formation kinetics of high-temperature phase sulphoaluminate
Thermal analysis was utilized to study the formation kinetics of high-temperature phase sulphoaluminate based on competitive reaction.Experimental investigation proved that the formation of sulphoaluminate began at 1100℃ and reached a maximum at 1331℃.High temperature resulted in the change of multi-crystals composed of CaO,Al_2O_3 and CaSO_4·2H_2O.The mobility of particles increased remarkably and accelerated the solid reaction process.The formation of high-temperature phase sulphoaluminate could be described by the first order reaction kinetics, and could belong to nucleus formation mechanism.