The result not only makes it further sure that the coal parting of kaolinitic claystone in the study area was formed by the alteration of volcanic ash fallen into the peat moor,also the authors put forward a new idea,according to the results of microelement analysis and REE analsis,th.

It has been thought that the “Caledonian” granitic intrusions were wi dely distributed in the intersection of northern marginal of the North China Cra ton and the Xing’an-Mongolian orogenic belt, with the Huangniling granite as t he most typical one.

Selective Comminution and Liberation Mechanism of Pyriterich Kaolinite;

The kaolin in Weibei is pure,idiomorphism of kaolinite is not so good,but crystallization is in order;,while the kaolin in Fugu is also pure,only little impurity,fine grained,good crystallized,and is a kind of high quality kaolin resource.

For promoting the production quality and enlarging the utilization of the resource of kaolinite, in technical flow of producing kaolin, we plan to dispose a kind of impeller deironing device different from the makeup principle of present magnetic separating device.