ASH CONTENT OF COAL BY X AND GAMMA -RAY TECHNIQUES

摘要

An X- or gamma -ray scatter assembly for use in quantitative determination of the concentration of ash in coke or coal 5, comprises X- or gamma -ray source 1, energy sensitive detector 3, 4 to detect X- or gamma -rays 8, resulting from X- or gamma -ray scatter in the coal or coke. Shielding means 2 is adapted to reduce the intensity of direct X-rays or gamma -rays and to collimate partly the beam of X-rays and/or gamma -rays to ensure matched volumes and deep penetration in the coal or coke. The assembly has an associated electronic analyser adapted to select all or one or more parts of the detected X-ray or gamma - ray spectrum, thereby modifying the output of the assembly. Two or more of these assemblies are employed in an apparatus and method for analysing coal or coke. IMAGE