Talk:Phosphogypsum
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Gypsum recycling in sulfuric acid factory or plant
[edit]CaS is produced by "carbothermic reduction" of calcium sulfate, which entails the conversion of carbon, usually as charcoal, to carbon dioxide:
- CaSO4 + 2 C → CaS + 2 CO2
and can react further:
- 3 CaSO4 + CaS → 4 CaO + 4 SO2
Instead of carbon or coal, could waste gypsum be sent to sulfuric acid plant where the gypsum is burnt with sulfur:
- CaSO4 + 3 S → CaS + 2 SO2
and reacted further:
- 3 CaSO4 + CaS → 4 CaO + 4 SO2
Overall,
- 4 CaSO4 + 3 S → 4 CaO + 7 SO2
Calcium oxide has wide spread used. In addition, could hydrogen sulfide be used also ? Recycling gypsum with sulfur and/or hydrogen sulfide could add another aspect to wet sulfuric acid process.
References
- ^ "Calcium sulfide". Retrieved 30 June 2016.
Not a phosphate mineral or mineral
[edit]This is neither phosphate mineral nor mineral at all. Eudialytos (talk) 12:29, 18 June 2017 (UTC)
A news article about phosphogypsum in Convent, LA
[edit]Interesting enough. It has a photograph of a big pile of phosphogypsum.
https://www.theguardian.com/us-news/2019/nov/06/louisiana-st-james-parish-lake-radioactive-industrial-waste-cancer-town-pollution-mosaic — Preceding unsigned comment added by 84.226.214.17 (talk) 10:26, 6 November 2019 (UTC)