Engineering and Technology
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DOI: Physicochemical Laws and Optimal Conditions of The Process of Transferring Magnesium Ions into The Solution by Decomposing Dolomite Mineral with Nitric Acid
Madina Rajabova , Doctoral student of Bukhara State Technical University, Uzbekistan Akhtam Khaydarov , Professor of the Department of "Chemical Technology" of Bukhara State Technical University, UzbekistanAbstract
In this work, the physicochemical regularities of the heterogeneous decomposition process of dolomite from the Navbakhor deposit in a nitric acid environment were studied. In the study, complexometric titration and X-ray diffractometry methods were used, and the dependence of the reaction medium on concentration and temperature factors was analyzed. It was established that in the optimal process mode (120% stoichiometry, 35% HNO3), active dissolution of carbonate minerals is observed, and in the solid phase, mainly inert quartz and wollastonite phases are concentrated. X-ray diffraction analysis of the solid residue formed after acid decomposition showed that the main part of the carbonate minerals was dissolved during the reaction, and it was found that mainly quartz (73.6%), wollastonite (22.4%), and magnesium-aluminosilicate phases (4.0%) remained in the solid phase.
The obtained results have scientific and practical significance for improving the technology for obtaining magnesium-containing solutions and producing magnesium compounds based on the acid treatment of local dolomite raw materials.
Keywords
Dolomite, nitric acid, acid decomposition
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