Decomposition of Magnesite-Sparing Waste in Sulfuric Acid with a High Concentration: Empirical Modeling and Determination of Optimal Conditions
DOI:
https://doi.org/10.31643/2026/6445.41Keywords:
Zinelbulak mine, talc-magnesite waste, magnesite, dissolution in sulfuric acid, mathematical model, kinetic analysis, regression analysis.Abstract
This article describes the processes of decomposition of magnesite waste in sulfuric acid, which is formed during flotation enrichment of the Zinelbulak talc-magnesite deposit. As a result of the research, the influence of concentration and temperature of the reaction medium on the dissolution of magnesite in H₂SO₄ solution was investigated and melting degrees were determined. Based on the data obtained, a mathematical model of the process was formed: the melting kinetics were described by equations, and the parameters were calculated using regression analysis. The modelling results were based on the rate at which magnesite melts, mainly acid concentration, and temperature factors were studied. The value of the coefficient of determination of the constructed mathematical model justified the fact that this model was 97.2% accurate. Based on the reliability of the mathematical model, optimal conditions are determined through experimental and model analysis. The optimum conditions are a temperature of T = 81.45 °C and an acid concentration of C = 74.05%, resulting in a decomposition rate of Ymax = 93.57%. The results of this work establish a scientific foundation for treating waste products containing magnesium and producing products such as magnesium sulfate from them. Initially, the article describes the composition of raw materials and experimental methods, then the mathematical model and the results obtained are analysed, and conclusions and proposals are presented.
Calculations were performed by zeroing the first-order derivatives. As a result of the calculations, the decomposition rate is Ymax = 93.57% when the temperature is T = 81.45°С and the concentration of acidity required for the process is C=74.05%.
On the basis of the studies conducted, the model created to determine the possibility of processing magnesitic waste in sulfuric acid under optimal conditions was found and proved to be theoretically useful. This model has made it possible to use the acid decomposition process efficiently and efficiently in the studies because it operates at high precision.
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