The effect of mixtures of particle sizes on the minimum ignition temperature of a dust cloud |
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| Affiliation: | 1. Department of Mining & Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USA;2. Clean Air Power Inc., Poway, CA 92064, USA;3. Division of Mining and Resources Engineering, Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;1. Applied Modelling and Computation Group, Department of Earth Science and Engineering, Imperial College London, Prince Consort Road, London SW7 2BP, UK;2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;1. Universidad Nacional de Colombia, Sede Medellín, Facultad de Minas, Carrera 80 # 60-224, 050036 Medellín, Colombia;2. Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Ghent, Belgium |
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| Abstract: | The ignition temperature in the air atmosphere at the separating line between an explosion and no explosion in a dust cloud, Tib, has been investigated for mixtures of fine and coarse dusts of the same material. The minimum ignition temperature, Tim, which is the lowest temperature at which an explosion is obtained has also been determined. Measurements were made in a Godbert-Greenwald Furnace apparatus. The results obtained indicated that the ignition temperature is dependent on the particle size, and an admixture of fine dust of 30% to coarse dust is sufficient to reduce the Tim values significantly. |
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