Analysis of coal

Details Analysis of coal Analysis of coal

G - Physics

01

N

358/7

G01N 23/08 (2006.01) G01N 23/12 (2006.01)

Patent

CA 1165018

ABSTRACT "ANALYSIS OF COAL" The present invention relates to a method and apparatus for analysing coal wherein the concentration of ash or mineral matter in said coal is determined from: (i) the result of a measurement in a first energy region of the intensity of X-rays or low energy .gamma.-rays of resulting from at least one scatter- ing interaction in said coal, said first energy region so chosen such that there is significant difference in absorption of radiation per unit weight in coal matter and mineral matter excluding iron, combined with (ii) the result of at least one further measurement at a different energy region of X-rays or low energy .gamma.-rays, resulting from-at least one scattering interaction in said coal, said different energy region(s) so chosen that there is a significant difference in absorption of radiation per unit weight of coal matter and mineral matter, and wherein the relative absorption per unit weights by said coal matter and said mineral matter at any one energy or energy region is significantly different from the absorption at each other energy or energy region.

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