Abstract
The article presents the results of the study of extractive phosphoric acid extraction processes from the mineralized mass (MM) - mineralized mass (MM) produced during the thermal processing of Central Kyzylkum (CK) phosphorite. Effects of sulfuric acid concentration on the quality parameters of the obtained wet-processing phosphoric acid (WPPA), processes of WPPA extraction through different concentrations of phosphoric acid solution from phosphoric acid-gypsum porridge were studied. The optimal parameters of these processes have been determined. In the composition of WPPA obtained in acceptable parameters 19,30-19,59% Р2О5, 0,08-0,09% F will be. Filtration rates of phosphatic-acid-gypsum porridges during extraction with different concentrations of WPPA are equal to 1096-1192 kg/m2·h. It was also determined that the main composition of the resulting phosphogypsum is as follows: 2,44-2,59% Р2О5total (t.)., 29,93-30,09% CaOtotal (t.), 41,29-41,50% SO3 and 1,16-1,21% F.
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