Continuous quality control of mined hard and soft coals

Details Continuous quality control of mined hard and soft coals Continuous quality control of mined hard and soft coals

1977-03-31

1978-10-03

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

175 41, G01V 500, E21B 4700

Patent

active

041186230

ABSTRACT:
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.

REFERENCES:
patent: 3940610 (1976-02-01), Dennis et al.

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