关键词: 活性石灰, 造渣, 焰化温度, 2CaO - SiO₂, 3CaO . SiO₂ , FactSage软件, 扫描量热法

Abstract: The limestone is calcined by an electric resistance furnace at 1 150 ~ 1 250 龙 to manufacture quickened lime for test. The activity of lime is measured according to standard ZBQ27002-85, and the beginning melting temperature, hemisphere temperature, flow property temperature, and the differential scanning calorimetry ( DSC) curves of samples of mixed lime and blast furnace slag are determined by the melting-point-rate apparatus and the high temperature synthetic thermal analyzer. Results show that with heating at 1 150 X. for 2 h the activity of lime is highest that is 417 mL； as the basicity (CaO/SiO₂) is constant, with increasing the activity of lime the beginning melting temperature, hemisphere temperature and flow property temperature of mixed furnace slag decrease; as the activity of lime is constant with increasing the basicity the beginning melting temperature, hemisphere temperature and flow property temperature of mixed furnace slag first decrease then increase； with increasing the activity of lime, the endothermic peak of formed 2CaO·SiO₂ and the exothermic peak of formed 3 CaO·SiO₂ occur at lower temperature. With simulated calculation by using Factsage software the results are in accord with experimental results.

Key words: Quickened Lime, Slag-Forming, Melting Temperature, 2CaO, SiO₂, 3CaO.SiO₂, FactSage Software, Differential Scanning Calorimetry