Research progress of phosphate resource processing:9.The new technology progress of feed-grade calcium phosphate

Divided into two parts:both defluorination by gas stripping and reaction-granulation the new technology of feed-grade calcium phosphate made from WPA is introduced.The differences of defluorination by gas stripping between vacuum concentration and atmospheric concentration are discussed.The advantages and weaknesses between spray-granulation and mechanical stirring-granulation are also analyzed,with the cost estimation.The technology has a good application prospect,for the preparation of 3 kinds products of MDCP with low energy consumption,and convenient for industrial production.