Emission of Volatile Fluorine Compounds from Partially Acidulated Phosphate Rocks Production Process

Emission of volatile fluorine compounds is considered to be the major environmental concern of the phosphate fertilizers manufacturing process. The results of presented studies indicates that the use of PAPR technology as an alternative to conventional superphosphatic fertilizers reduces F total emission. For the assumed production capacity of 800 Mg/day of PAPR products a decrease in PAPR value from 1.0 (SSP) to 0.3 causes a reduction in F by average: 6045 1675 kg/day and 1545 506 kg/day for H2SO4 and H3PO4 respectively as the mineral acids used for acidulation process, while decrease in PAPR value from 1.0 (SSP) to 0.5 causes a reduction in Fby average: 6045 1865 kg/day and 1545 660 kg/day for H2SO4 and H3PO4, respectively. Reducing the F – content improves environmental and economic profile of the installation, limits the amount of resulting silica, and allow a reduction in off-gas flow intensity, or spraying density.