Investigation of the Physicochemical Regularities of the Decomposition of Local Dolomite Raw Materials Using Sulfuric Acid
DOI:
https://doi.org/10.66960/jof.3093-8899.00045Keywords:
Dolomite, sulfuric acid, decomposition process, MgO extraction, CaSO4, chemical analysis, phase composition, Dehqonobod deposit, X-ray diffraction analysis, technological parametersAbstract
In this study, the physicochemical regularities of the decomposition process of dolomite raw material from the Dehqonobod deposit using sulfuric acid were investigated. The experiments were carried out under laboratory conditions at an H2SO4 concentration of 20-40%, a stoichiometric ratio of 100-110%, a temperature of 50 °C, and a duration of 40 minutes. The chemical compositions of the resulting slurry, liquid, and solid phases were comprehensively analyzed. The results showed that increasing the acid concentration and stoichiometric ratio leads to a significant rise in the contents of CaO, MgO, and sulfate compounds. The degree of MgO transfer into the liquid phase reached its maximum under optimal conditions determined as an H2SO4 concentration of 35-40%, a stoichiometric ratio of 110%, a temperature of 50-55 °C, and a reaction time of 40 minutes. X-ray diffraction analysis confirmed that the main component of the solid phase is CaSO4 (≈77%).
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