Journal
ADVANCED MATERIALS, PTS 1-3
Volume 415-417, Issue -, Pages 735-+Publisher
TRANS TECH PUBLICATIONS LTD
DOI: 10.4028/www.scientific.net/AMR.415-417.735
Keywords
Phosphogypsum; Thermal decomposition; Additives
Categories
Funding
- Science Research and Development Project of Hubei [2009BCB031]
- Fund of Huanggang Normal University [2011CD216]
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The effect of different additives on thermal decomposition of phosphogypsum was investigated by means of a thermogravimetry coupled with a Fourier transform infra-red spectroscopy. These additives included C, CaO, Al2O3 and S. The temperature of thermal decomposition of phosphogypsum is about 1100 similar to 1320 degrees C without any additives under the background of nitrogen. The temperature of the thermal decomposition of phosphogypsum decreased obviously with the addition of CaO, C and S. No influence was found for the thermal decomposition of phosphogypsum with the addition of Al2O3. As one of evolved products from the thermal decomposition of phosphogypsum, SO2 production was discussed.
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