Three coal samples, with abrasiveness indices of 533, 779 and 142 iron eroded, respectively, were heated 350 C in a current of air to remove carbonaceous material.
Reference:
Von Wolff, W. 1969. Determination of quartz and pyrites in coal for comparison with their abrasive properties. http://hdl.handle.net/10204/12909 .
Von Wolff, W. (1969). Determination of quartz and pyrites in coal for comparison with their abrasive properties Retrieved from http://hdl.handle.net/10204/12909
Von Wolff, WTE Determination of quartz and pyrites in coal for comparison with their abrasive properties. 1969. http://hdl.handle.net/10204/12909
Von Wolff W. Determination of quartz and pyrites in coal for comparison with their abrasive properties. 1969 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/12909
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