关键词: 湿法磷酸, 二水-半水法, 半水-二水法, 二水-DCP联产工艺

Abstract: For the purposes of energy conservation-consumption reduction and comprehensive utilization of phosphogypsum， it is of great significance to re-study and compare the production processes of wet-process phosphoric acid for the sustainable development of phosphorus chemical industry in China.The techno-economic comparison was made for the process routes （especially，the dihydrate wet-process，half-hydrate wet-process，and half-hydrate-dihydrate wet-process） of wet-process phosphoric acid at home and abroad.Suggestions were proposed for the selection of process route of wet-process phosphoric acid in China.The production technologies of half-hydrate-dihydrate wet-process，dihydrate-half-hydrate wet-process，and dihydrate-DCP coupled joint process were introduced in detail.It was also pointed out that the enterprises in China should select the process route of wet-process phosphoric acid according to the requirements of phosphate products and the utilization value of phosphogypsum. 

Key words: wet-process phosphoric acid, dihydrate-half-hydrate wet-process, half-hydrate-dihydrate wet-process, dihydrate－DCP joint process