THE RESEARCH OF PROCESSING LOW QUALITY PHOSPORITES INTO PHOSPHORIC ACID

The research of the acidic decomposition of aluminium and iron containing phosphorites for getting extracted phosporic acid has been conduted. It has been shown that at the temperature of 50-60°С having the excess of SO3 in production acid at 3-4% of the mass and the recovery rate of Р2О5 at 89-92% it is possible to obtain the phosphoric acid of 18-20% concentration. The phosphoric acid obtained can be processed into mineral fertilizers without preliminary evaporation which would result in turning the acid into the viscous mass unusable for further processing.