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| Experimental study on purification of gypsum, a by-product of phosphoric acid industry in Yunnan |
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Received:February 13, 2023
Revised:February 22, 2023
Accepted:February 23, 2023
Published Online:August 22, 2023
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| DOI： |
| KeyWord:phosphogypsum; purification; direct flotation; calcium sulfate |
| Author | Institution |
| ZHANG Hua |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
| YANG Wen-quan |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
| LI Hai-bing |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
| He Hai-tao |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
| CAI Zhong-jun |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
| WANG Chong |
Yunnan phosphate group R D center Yunnan Kunming National Engineering and Technology Center for the Development Utilization of Phosphorous Resources Yunnan Kunming |
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| Abstract: |
| The flotation purification technology of phosphogypsum was studied in view of the by-product of wet phosphoric acid in a large phosphorus chemical industry in Yunnan. The research shows that when the pulp pH is 1.3 and the dosage of collector YP8-2 is 0.3kg/t, the mineral processing index of 97.63% CaSO4.2H2O content and 94.72% recovery can be obtained through the full-size "one coarse, two fine and one sweep" direct flotation closed circuit process; Through the direct flotation closed circuit process flow of "one coarse, one fine and one sweep", the beneficiation index with the content of CaSO4.2H2O of 98.92% and the recovery of 98.19% can be obtained. The results of the purification test of gypsum, a by-product of phosphoric acid industry, provide pretreatment technology for the high value utilization of phosphogypsum resources. |
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