DEVICE FOR SEPARATING GOOD GOOD FROM GREAT GOOD

摘要

PCT No. PCT/SE79/00064 Sec. 371 Date Nov. 23, 1979 Sec. 102(e) Date Nov. 23, 1979 PCT Filed Mar. 21, 1979 PCT Pub. No. WO79/00812 PCT Pub. Date Oct. 18, 1979.This invention relates to an apparatus for separating fine material from coarse material. The screens at present in use in the mining industry usually are so-called shaking screens. They comprise a screen-cloth, which is subjected to a vibration movement. This type of screen, however, has a very high noise level and also is exposed to heavy wear owing to the vibrations, to which the screen parts are subjected. The present invention has the object to provide an apparatus of the kind referred to above, in which the noise level and the mechanical wear are substantially lower than at conventional screens. The apparatus according to the invention comprises a perforated stationary screen-cloth (9) supported by members (10, 11, 12), which are interconnected to a closed chain (17) in such a manner, that the support members can be moved along an endless path, and means (11b, 13, 24) for rotating the portions of the support members (10, 11, 12) abutting the screen-cloth (9) in the direction opposed to the direction of movement of the support members along the path.