Talk:Phosphogypsum

Latest comment: 4 years ago by 84.226.214.17 in topic A news article about phosphogypsum in Convent, LA

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

[1]

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

  1. ^ "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)Reply

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)Reply