| 摘要 |
PURPOSE:To improve the degree of sepn. between magnetic particles and nonmagnetic particles by mixing the raw material powder to be separated with a liquid to prepare a slurry, processing the slurry with a grinder to grind the flocs of the raw material powder then separating the particles with a magnetic separator. CONSTITUTION:The raw marerial powder to be separated is mixed with a liquid in a raw water tank 1 to prepare a slurry, and the slurry is processed with a grinder 20 to grind the flocs of said raw material powder. The slurry subjected to the grinding is separated to magnetic particles and nonmagnetic particles with a magnetic separator 13. The slurry charged in a hopper 40 in said grinder 20 is forced into the gap part between grindstones by the impeller provided at the top end of a shaft. The particles in the slarry are first sprung off by the lower grindstoe rotating at a high speed and collided against the inside slope of the stationary upper grindstone. The particles are gradually pulverized and dispersed by the shearing force and friction force generated therein. The degree of sepn. of the magnetic particles and the nonmagnetic particles is thus improved.
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