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| Regeneration of spent bleaching clay by secondary calcination |
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| DOI：10.12166/j.zgyz.1003-7969/2019.11.023 |
| KeyWord:spent bleaching clay secondary calcination bleaching effect recycling recycled clay |
| FundProject: |
| Author Name | Affiliation | | WANG Yuehua1, LIU Yulan2, LI Chaoqun1, HAO Xiuyun1,
CHENG Fangyuan1, WANG Ping1 | 1.R&D Center of Shandong Sanxing Group, Binzhou 256209, Shandong,China
2.College of Food Science and Technology,Henan University of Technology,Zhengzhou 450001,China |
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| Abstract: |
| The spent bleaching clay was regenerated by secondary calcination, and the calcination temperature and calcination time were studied. The optimal regeneration conditions of spent bleaching clay were determined as follows: twice calcination at 520 ℃ for 0.5 h. Under these conditions,the bleaching rate of recycled clay reached 79.79％,close to the bleaching effect of new activated clay(82.18%), which achieved the goal of recycling, cost saving, energy saving, environmental protection and safety. |
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