Abstract: A new integrated method based on upgrading low-grade calcareous phosphate ore with low CO2 emissions and low phosphogypsum waste production is disclosed. The method is an alternative integrated method that increases P2O5 recovery, reduces costs, minimizes the environmental impact of product phosphogypsum and CO2, and overcomes limitations due to different impurities that have negatively affected the yield of traditional processes to a wide range of natural phosphate sources.

Abstract: A new integrated method to capture polluted CO2 using CaO produced from phosphogypsum calcination using sulfur as non-CO2 fuel where (1) both pollutants of phosphogypsum and CO2 are transformed into environmentally neutral or useful products such as limestone or clinker and sulfuric acid; (2) low-CO2 CaO produced from calcination of phosphogypsum with sulfur as fuel can be used to produce low-CO2 clinker that replaces the use of high-CO2 limestone as raw material; (3) the use of sulfur as fuel to calcine phosphogypsum allows the production of low-cost sulfuric acid.

Abstract: A new integrated method to capture polluted CO2 using CaO produced from phosphogypsum calcination using sulfur as non-CO2 fuel where (1) both pollutants of phosphogypsum and CO2 are transformed into environmentally neutral or useful products such as limestone or clinker and sulfuric acid; (2) low-CO2 CaO produced from calcination of phosphogypsum with sulfur as fuel can be used to produce low-CO2 clinker that replaces the use of high-CO2 limestone as raw material; (3) the use of sulfur as fuel to calcine phosphogypsum allows the production of low-cost sulfuric acid.