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Recent Investigations on the Influence of Particle Size in Coal Dust Explosions

机译：煤尘爆炸中粒度影响的研究进展

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A suitable experimental technique was developed and small-scale tests were carried out, demonstrating that the explosion violence of coal dusts increases with increasing fineness of the dust. There is no optimum particle diameter, such as was found in earlier investigations. Large-scale tests confirm these results. A limiting particle diameter, above which a coal dust explosion is no longer possible, cannot be defined without overmuch simplification. If fine dust is added, coarse-grained material can itself become explosive, even when the concentration of the fine dust is definitely below the lower explosion limit. 3 references, 8 figures, 3 tables. (ERA citation 10:009518)

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