Effects of Additives on the Reductive Decomposition of Phosphogypsum in the CO Atmosphere

Abstract:

The effect of the reaction time and the amount of additives on the decomposition rate and temperature of phosphogypsum were studied in the weak reducing atmosphere of 3%Vol CO by using the mixture of phosphogyp-sum and a certain percentage of CaCl₂, Fe₂O₃ and MgO additives. The result shows that the decomposition rate of phosphogypsum reached 85% by adding CaCl₂ and Fe₂O₃, and the decomposition temperature of phosphogypsum was only 950°C which was 100 °C lower than the one of decomposition reaction of phosphogypsum without any adductives. And the addition of MgO had no significant effects on the decomposition of phosphogypsum under the same condition.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 331-339
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.331
• Online since: August 2013
• Authors: Long Gui Xie, Li Ping Ma, Qu Xiu Dai, Yu Mao, Hang Zhang, Jun Ma
• Keywords: Additive, Phosphogypsum, Reductive Decomposition

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