Feed-grade calcium hydrogen phosphate was prepared by defluorination and neutralization method with wastewater in phosphate fertilizer plant,diatomite,sodium chloride and lime milk as raw materials.

• 以磷肥厂废水、硅藻土、氯化钠和石灰乳为原料,采用脱氟与中和法制备饲料级磷酸氢钙,并通过正交试验优化了工艺条件。