Study on the Carbon-Thermal Reaction Mechanism of Potassium feldspar and Phosphogypsum

Chao Qin Yang; Ju Pei Xia

doi:10.4028/www.scientific.net/AMR.1073-1076.308

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1073-1076Study on the Carbon-Thermal Reaction Mechanism of...

Study on the Carbon-Thermal Reaction Mechanism of Potassium feldspar and Phosphogypsum

Abstract:

This paper has proved that best material ratio is n (KAlSi₃O₈) : n (CaSO₄) : n (C) = 2:7:3 in carbon-thermal reduction of potash feldspar and phosphogypsum for preparation potassium sulfate, which is based on thermodynamic calculation and analysis, combined with experimental study. XRD analysis shows that generated solid content is K₂SO₄, CaSiO₃ and Ca₂Al₂SiO₇ at the batching system. Under the above ingredients system, the production ways of potassium sulfate have three possible. It depends on operating temperature of the system. At the same time, the phosphogypsum reduction conditions and decomposition rate is controlling factor that potassium sulfate is generated in the system.

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Periodical:

Advanced Materials Research (Volumes 1073-1076)

Pages:

308-313

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.308

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Online since:

December 2014

Authors:

Chao Qin Yang, Ju Pei Xia

Keywords:

Phosphogypsum, Potassium Feldspar, Potassium Sulfate, Reaction Mechanism

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