THE EFFECT OF SULPHATE ACID CONCENTRATIONS ON THE PROCESS OF EXTRACTION OF PHOSPHATE FROM PHOSPHORIT FLOUR

To date, there are two methods of industrial production of phosphoric acid: dry (electric furnace) extraction and (wet) method. The process of recovering phosphorus from the product obtained by burning phosphates in blast furnaces, followed by oxidation in blast furnaces and subsequent dissolution in water is called thermal phosphoric acid (TPA), and the phosphoric acid extracted from the phosphate rock product with the participation of mineral acids is called extraction phosphoric acid (EPA). The concentration and purity of TPA are higher than that of EPA, but since its cost is much higher, phosphate fertilizers are produced from EPA.