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Influence mechanism and regulation strategy of atmospheric conditions on the thermal decomposition of phosphogypsum
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DOI：10.1016/j.cjche.2026.02.013.png)
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Abstract
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• Systematically clarifies the effects of atmospheric conditions on phosphogypsum reductive decomposition and product selective regulation mechanism • CO2 effectively promotes CaS conversion to CaO, realizes directional CaO regulation and inhibits CaS formation in the reaction system • partial pressure ratio is the core parameter, its increase significantly raises phosphogypsum decomposition mass loss rate and CaO yield • High-purity CaO is prepared from phosphogypsum under 5% CO–75% CO2–20% N2 atmosphere at 1050 °C
Keywords:
phosphogypsum
thermal decomposition
atmospheric conditions
CaO yield
CO2 effect
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