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Continuous quality control of mined hard and soft coals
Continuous quality control of mined hard and soft coals
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机译:开采硬煤和软煤的持续质量控制
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摘要
A method is provided for determining the shale content of mined coal by monitoring the thorium content of the coal. Thorium content and ash content are shown to be related whereby a direct reading of the thorium will be indicative of the shale content of the coal and the ash content of the coal. The method utilizes the natural radiation of thorium to provide the continuous or selective control of mined coals.
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