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对磷酸氢钙生产中的除氟工艺条件及工艺流程进行了改进，改进后该工序的Ｐ２Ｏ５得率可由９５．２％提高到９９．５％。
The technological conditions and technological process of fluoride removal in the production of dicalcium phosphate have been improved. The yield of P2O5 in this process can be improved from 95.2% to 99.5% after the improvement.