Kinetics of Hydrothermal Decomposition of Potassium Feldspar with Calcium Hydroxide

Abstract:

The aegirine-augite syenite potash ore, taken from Changling, Luonan in Shannxi province, were hydrothermally decomposed over the temperature ranges of 533 K to 563 K using calcium hydroxide as additive. The dissolution ratio of the K2O at different reaction temperature and time was determined. Analysis of the experimental results revealed that the dissolution rate of potash ore satisfies the chemical reaction controlled kinetic equation. The rate constant of hydrothermal reaction at different temperatures was obtained. The activation energy was calculated using the Arrhenius equation. The hydrothermal decomposition mechanism of microcline was proposed.

• Periodical: Advanced Materials Research (Volume 549)
• Pages: 65-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.549.65
• Online since: July 2012
• Authors: Yu Qin Liu, Hong Tu Xia, Hong Wen Ma
• Keywords: Decomposition Mechanism, Hydrothermal Decomposition, Kinetic, Potash Ore

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