Author:Von Wolff, WTEDate:1969Three 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.Read more
Author:Copeman, JH; Von Wolff, WTEDate:1968The present study was undertaken to establish to what extent the method could be applied to analysis of coal ashes.Read more
Author:Copeman, JH; Von Wolff, WTEDate:1965Because of the effect of inorganic impurities on the utilization of coal, it was decided to carry out a survey on the minerals present in production samples from different mines.Read more
Author:Copeman, JH; Von Wolff, WTEDate:1968When certain component, in a mixture with other components, has to be determined in a sample, one cannot directly compare line intensities of the pure component, proposed under identical conditions as the sample, because of the absorption ...Read more
Author:Von Wolff, WTE; Kesslers, IMDate:1966This work was done at the request of Messrs Anglo American Corporation of S.A Limited, and reports on the magnetic analysis of a magnetite ore sample received from the Wankie colliery company, Limited, Rhodesia.Read more