Mathematical model of chalcocite particle combustion
作者： A. A. Shook , G. G. Richards , J. K. Brimacombe
DOI: 10.1007/BF02651718
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摘要: A mathematical model has been developed to simulate the combustion of a single chalcocite particle (particle diameter between 10 and 100 microns) in air, oxygen, oxygen-SO2 mixtures. Neglecting temperature composition gradients within particle, computes thermal compositional changes as function time. Five chemical reactions were considered describe interaction gas particle. Copper vaporization below boiling point was calculated by balance rate (characterized Langmuir-Knudsen equation) mass transfer from surface The calculations verified comparison with published loss data obtained stagnant reactor. revealed that for particles combusting copper does not limit temperature, all sizes 20 microns can readily reach (2836 K). Thus, explosions observed an earlier study are likely due Calculations air snowed only small (<20-micron diameter) would be capable exploding, which agreed generally observations. Consequently, commercial flash-converting furnace, careful control size oxygen atmosphere must maintained minimize concomitant dust formation.
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