Abstract
Thermodynamic analysis and experimental research of the chlorination of nickel ferrite (NiFe 2 O 4 ) by gaseous chlorine in the presence of added C, BaS, S and NaCI in the temperature range from 300 to 900°C are given in this paper. Nickel ferrite chlorination in the presence of BaS and CaCl 2 was carried out in the temperature range from 750 to 950°C. The presence of added C, BaS, S and NaCI intensifies the chlorination process of nickel ferrite by gaseous chlorine and reduces the temperature the reaction begins at from 700 to 300°C. It is concluded that the process of nickel chlorination without additives is chemically controlled, whereas it is diffusion controlled in the presence of additives. The chlorination of nickel ferrite by calcium chloride, i.e., gaseous hydrochloric acid, is intensified in the presence of 7.5 mass % of CaCl 2 and 2 mass % of BaS in nickel ferrite, and temperature range from 750 to 950°C. The results obtained in thermodynamic analysis are in good agreement with the experimental ones.
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