Determination of Calcium Vapour Pressure in the Thermal Production of Calcium Metal
The production of metallic calcium, by reduction of lime with aluminium, was investigated. Using a modified form of the effusion method, the vapour pressure of calcium above the reaction: 4Ca0 + 2Al ~ 3Ca + CaO.AI,03 was determined and found to vary from 1.0 to 1.3 mm. Hg from 1,150° to l,200°C. From the magnitudes of the various thermodynamic quantities involved, together with a consideration of the known chemical characteristics of the reaction, it was suggested that the reaction proceeded by reduction of lime with aluminium vapour.
Calcium, calcium, operating temperature, reducing agent, University of Toronto, vapour pressure, Furnaces, Lime, metals, Pressure, Reduction, Systems, Temperature, Tubes