PURPOSE: To enhance separation and exclusion capacity of a magnetic material in a liquid as well as to smooth movement of contained magnetism by a method wherein spikes are formed on a conveyor having a permanent magnet mounted thereto while a scraper is contacted with the upper surface of said magnet in a slidable manner.

CONSTITUTION: When a magnetic substance containing liquid such as a cutting oil or the like is poured in a liquid containing tank, a magnetic material such as a cut powder or the like is accumulated on an upper surface of a foward running side of the conveyor 4. Said cut powder is attracted to a permanent magned 15 provided to the lower surface of the conveyor and adsorbed on the upper surface of the conveyor 4 and conveyed to other end to be thrown into a receiving container or the like. A magnetic powder sticked to the conveyor 4 is adsorbed to and removed by a magnet drum or the like. Further, a spike 7 is provided on the surface of the conveyor 4 in a protruded manner and the interwound cut powder or the like is unravelled to be certainly conveyed to the other end. The fine powdery cut powder turned into a gap between a hopper plate 29 and the conveyor 4 is scraped off by a scraper 5 attached to an inner surface of the conveyor 4 to be conveyed by said conveyor 4.