Numerical analysis on fluid flow and heat transfer in the smelting furnace of mitsubishi process for Cu refining |
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Authors: | Jong-ha Park Soo-sang Park Xue-feng Han Kyung-woo Yi |
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Affiliation: | 1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea 2. LS-Nikko Copper Inc., 148 Sanam-ro, Onsan-eup, Ulju-gun, Ulsan, 689-892, Korea 3. Research Center for Iron and Steel, RIAM, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea
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Abstract: | To understand complex behavior in the smelting furnace of Mitsubishi continuous process for copper refining, comprehensive 3-D numerical simulation and field experiment were performed. The numerical simulation results showed that strong and complex velocity fields of gas, matte and slag were generated in the furnace and large amounts of matte and slag were splashed into the gas area. Temperature measurements at the lance during field operation revealed that wide range of temperature variation appeared depending on the injection condition of concentrates. Numerical simulation results provided good agreements with experiments results and showed that the chemical reaction induces temperature increase during gas injection period. On the other hand, lance temperature is decreasing because of cold concentrates during gas and particles injection period. From the FFT analysis results, the fluctuations of matte and slag volume fraction near the lance induce temperature fluctuations of the lance. Through these experimental and simulation results, it was revealed that the lances in the smelting furnace were exposed to severe conditions such as high temperature, repeated large temperature change and cyclic change of large temperature gradient across the thickness. |
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