THERMODYNAMIC PARAMETERS OF PROCESSING COBALT-CONTCAINING ORES AND OF IVESTIGATION OF CONDITIONS OF SEPARATION COBALT FROM SOLUTION

Kinetics of separation of Co by dissolution of cobalt ores was studied. Using of methods chemical analysis decomposition of cobalt, iron, calcium, manganese and magnesium oxides to simple chlorides with thermal consequence at interacting with ammonium chloride and forming ammonium chloride complexes was confirmed. Optimum yield of cobalt makes up 94% at 3000С for 160 min. To define the mechanism of the process results of thermogravimetric and X-ray phase analysis methods were used. Free energy values of chlorination of cobalt compounds with ammonium chloride were calculated. Change of Gibbs energy value depending on the temperature was calculated. As seen from calculations obtaining of compound CoCl2 is possible from thermodynamic. Separation condition of cobalt and accompanying elements from solutions depending on pH by precipitation was studied