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Phosphogypsum disposal from Dinh Vu DAP company was used to separate phosphate and make gypsum by (NH¬4)2SO4. The reaction time was 120 min. The percentage of P2O5 after removal was 0.72 % and met the Vietnam Standard 11833:2017 issued by Institute of Building Materials. The components in phosphogypsum could be applied to manufacture cement. The final product was mixed by PG120 : clinker : fly ash with ratio 5:80:15% (w/w), respectively to manufacture cement. The cement was tested compressive strength. The strength was 55 N/mm2 after 28 days.

Reuse Phosphate Gypsum Waste from Dinh Vu DAP Company to Manufacture Cement