FINE GRINDING INSTALLATION FOR LABORATORY EXPERIMENTS

摘要

PCT No. PCT/DE84/00043 Sec. 371 Date Nov. 2, 1984 Sec. 102(e) Date Nov. 2, 1984 PCT Filed Mar. 2, 1984 PCT Pub. No. WO84/03453 PCT Pub. Date Sep. 13, 1984.An apparatus for fine grinding of, in particular, material samples for laboratory experiments. The apparatus has a fixed grinding member and a rotating grinding member, which are disposed in such a way that each has a surface facing the other and slightly spaced therefrom, with the material which is to be ground being received and passed between these surfaces. The problem faced by such an apparatus is that samples have to be introduced and discharged one by one, so that the work is carried out as a batch process. It is also difficult to accurately adjust the grinding degree. In order to solve these problems, and to carry out a continuous grinding of hard and very hard materials, as well as to be able to adjust the grain size of the grinding, the invention proposal is that the grinding members on the one hand be a fixed cylindrical body and on the other hand be a roller body which rotates coaxially therein. A small annular gap, preferably in the order of magnitude of one half of a millimeter, remains between these two bodies. The material which is to be ground is introduced at one end face of the roller body, and the ground material is essentially discharged at the other end face of the roller body. For this purpose, appropriate devices are provided. The common central longitudinal axis of the two grinding members can be pivoted by suitable mechanisms through numerous inclined positions up to an essentially vertical position. A conical body which passes into the surface of the roller body can be disposed at at least one end face of the latter.