Materials Science and Nanotechnology

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Materials Science and Nanotechnology 44 7897 074717

Mining & Metallurgy Online Journals

The achieved microstructure in quenched samples was observed by SEM. The prepared phases were recognized by XRD and EDS analysis. in this experiment, Author validated experimental data with the chemical kinetic model. No significant difference has been observed in the degree of reduction on the type of coal used as the reducing agent.  The highest reaction rate constant was observed at 1000°C. Abnormal swelling was noted at 850 and 900°C, whereas shrinkage was noted at 950 and 1000°C.  For many operators, a spreadsheet-based modeling technique is attractive since the calculations are directly accessible, models can often be developed by site staff, and the results are generally easy to extract and interpret. The authors have developed a spreadsheet-based modeling technique that provides a high degree of flexibility, while still considering detailed operating information for ore properties, leach kinetics, scale-up factors, lift height, and in-heap metal inventories.  At any point in time, the difference between total metal extracted and total metal recovered is equal to the in-heap inventory of the leached metal. This paper describes the modeling technique, including input data required and methods for defining kinetic leach curves and metal recovery curves. The technique is compared against an alternative spreadsheet technique using a simplified in-heap solution inventory calculation to forecast metal production, which has proven to be effective at a number of sites.

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