CALCULATION OF THE VALUES OF THERMODYNAMIC FUNCTIONS OF THE SULFURIC ACID DECOMPOSITION OF THE PHOSPHORITE CONCENTRATE OF THE RIVAT DEPOSIT OF TAJIKISTAN
The article summarizes the results of laboratory studies and calculation of the values of thermodynamic functions of the process of sulfuric acid decomposition of phosphorite concentrate from the Rivat deposit. The mineralogical composition of the concentrate was determined by X-ray phase analysis. It is shown that the main constituent of the concentrate is carbonate - fluorapatite. In the course of the study, it was shown that an increase in temperature adversely affects the sulfuric acid decomposition of the concentrate and it proceeds spontaneously at room temperature.