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Get MoreMining of coal leads to coal dust, and flour mills likewise have large amounts of flour dust as a result of milling. A gigantic explosion of flour dust destroyed a mill in Minnesota on , killing 14 workers at the Washburn A Mill and another four in adjacent buildings.
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Get MoreThe dust concentration is varied over a wide range until there is no further increase in either the explosion pressure or the rate of pressure rise. The explosion behaviour in the 20 litre-sphere is evaluated by means of the corrected explosion pressure.
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Get MoreExplosions consistently occur when the coal air mixture is leaner than normal, either when initating coal feed on mill start-up, stopping coal feed on shutdown, or when equip- ment problems cause inadvertent loss of feed. Upon loss of feed to a pulverizer, the coal/ air mixture in the system becomes leaner and the coal dust will
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