Study of the Production of Wet-processing Phosphoric Acid by Clinker Method on Base of Mineralized Mass

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.