Abstract
Nitrogen solubilities in the CaO—CaF2 system were determined under controlled oxygen partial pressures as well as at carbon saturation. Nitrogen contents (as N3−) were shown to strongly depend on oxygen partial pressure from 10−11 to 10−13 atm. At carbon saturation both nitride and cyanide contents are also dependent on oxygen partial pressure, i.e. CO partial pressure. The dependence of nitride and cyanide contents on nitrogen partial pressure was found to be compatible with the theory and is described by the equations proposed in this paper. The results are also discussed in terms of nitride and cyanide capacities for a better understanding of the dissolution of nitrogen in slags of different composition. The temperature dependence of nitride content showed an increase in nitride content with increasing temperature.
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