Kiln Phosphoric Acid
Kiln Phosphoric Acid
Kiln phosphoric acid(KPA) process technology is the most recent technology patented by Joseph A. Megy in 2008. At high-temperature, in a long rotary kiln reactor, phosphate ore, silica and cheap, high-sulphur, green petroleum coke and countercurrent air produces calcium silicate, gaseous phosphorus pentoxide and carbone dioxide. Sulphur is extract as sulfate of Ca or Mg.
Called the "Improved Hard Process", this technology will both make low grade phosphate rock reserves commercially viable and will increase the P2O5 recovery from existing phosphate reserves. This may significantly extend the commercial viability of phosphate reserves in existing operations as well as in greenfield developments, thereby positively affecting the operating economics. In Florida, there is potential to treble phosphate reserves through the application of this or other technologies that are tolerant of phosphate rock contaminants. High purity, high concentration (68%-70% P2O5) near water white acid is produced without the production of phosphogypsum, an undesirable waste product of the dominant technology today, the wet acid process. Rather a co-product aggregate is produced that neither emanates radon nor leaches metals. Lower raw material cost, owing to tolerance of low grade phosphate rock and the process's use of petroleum coke as its primary reactant, promise to reduce operating cost compared to the wet acid process and increase availability of superphosphoric acid, which is used in liquid fertilizers.
Called the "Improved Hard Process", this technology will both make low grade phosphate rock reserves commercially viable and will increase the P2O5 recovery from existing phosphate reserves. This may significantly extend the commercial viability of phosphate reserves in existing operations as well as in greenfield developments, thereby positively affecting the operating economics. In Florida, there is potential to treble phosphate reserves through the application of this or other technologies that are tolerant of phosphate rock contaminants. High purity, high concentration (68%-70% P2O5) near water white acid is produced without the production of phosphogypsum, an undesirable waste product of the dominant technology today, the wet acid process. Rather a co-product aggregate is produced that neither emanates radon nor leaches metals. Lower raw material cost, owing to tolerance of low grade phosphate rock and the process's use of petroleum coke as its primary reactant, promise to reduce operating cost compared to the wet acid process and increase availability of superphosphoric acid, which is used in liquid fertilizers.