Abstract
In references for aluminothermic reduction of metal calcium thermodynamic calculation are choose metal temperature range for the liquid or gaseous state thermodynamics calculation, the results show that the temperature at which the reaction can occur is very high. In this article, by comparing the two calculation methods under normal pressure, the theoretical initial reaction temperature of the four reactions is very high under normal pressure. The lowest temperature is the reaction to generate 3CaO·Al2O3, but the reaction still needs to exceed 2421K. The results of the two calculation methods is very different. These are 222K, 78K, 151K, and 85K. At 10Pa, Theoretical initial reaction temperature of the four reactions are 859K, 877K, 928K, and 878K. If the calculation result of the high-temperature region is substituted for the calculation result of the whole temperature interval, the theoretical initial reaction temperature of the four reactions are respectively 1329K, 1344K, 1374K and 1374K at 10Pa. The difference value of each reaction is 470K, 472K, 446K, and 459K.
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