Studies on the Production of Calcined Phosphatic Fertilizer under Low Kiln Temperature

1. The condition for manufacturing the phosphatic fertilizer by utilizing the reaction between phosphate roch and alkali in water vapor was investigated. 2. It is possible to produce the calcined phosphate soluble in 2% citric acid at the lowest kiln temperature. 3. The temperature of 800℃. Was needed for this method when sodium chloride was used, and 900℃. Was needed when potassium chloride was used. ....