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Browsing Research Papers by Author "Baasandorj Myagmarsuren"

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    Advanced metallurgical test work on zinc ore
    (2024) Baasandorj Myagmarsuren; Dorjsundui Gombokhurts; Dashdondog Yamaaranz; Purev-Ochir Togtokhbaatar
    In these leaching investigations, sulfuric acid was employed to study the leaching rate of zinc ore, and the results were used to construct the simulative model with inverse methodology. To construct the simulative model, the prior results are used to identify the parameters and variable inter-relation with a shrinking-core model and re-expanded into column model using an interpolation with regression models. The model was tested against a column leaching to calibrate and extended to predict under different parameters for further cases. The zinc ore primarily consists of calcite, quartz, and dolomite, as determined by MLA-SEM analysis conducted in Germany. Chemical analysis revealed that the ore contains approximately 1.31% zinc, a figure confirmed by MLA-SEM. The optimal sulfuric acid concentration was found to be around 50 g L-1 , achieving a zinc recovery rate of approximately 60% within 8 hours. The maximum zinc recovery reached 72.5% at a concentration of 80 g L-1 within 64 hours. A bottle roller test was conducted to generate fundamental data for subsequent column leaching experiments. The column leaching test was carried out over a 30-day period, resulting in a zinc recovery of 19.01%. Additionally, the mathematical model predicted a recovery of 17.85% within the same timeframe, with a strong correlation of approximately 95% between the simulated and experimental results.