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AssigneeDai Nippon Toryo Co., Ltd.
InventorsAkira Okada, Ryoji Izumi, Syogo Ninomiya, Yukio Tahara, Yuji Takehara, Masaaki Suezawa, Kazuhiro Kawasaki
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This invention relates to a method for dispersing a suspension of solid particles into the colloidal state, which comprises charging grinding media and said dispersion into a vessel so that the volume ratio of the grinding media and the suspension is within a range of from 2/1 to 1/2 and agitating the suspension and the grinding media by rotating one agitation rod mounted on the tip end of an agitation shaft at the lower part of the central portion of the vessel so that the peripheral velocity of the tip of the agitation rod is within a range of from 6 to 20 m/sec. The invention also is directed to an apparatus for practicing this method.
A method for dispersing suspensions which comprises charging grinding media and a suspension containing solid particles in a vessel so that the grinding media/suspension volume ratio is withing the range of from 2/1 to 1/2, and agitating the suspension and grinding media by rotating a single agitation rod mounted on the tip end of an agitation shaft at a lower part of the central portion of the vessel so that the peripheral velocity of the tip of the agitation rod is within a range of 6 to 20 m/sec, and a laminar flow is produced in the suspension to thereby disperse the suspension in the colloidal state.
An apparatus for dispersing suspensions which comprises a vessel, grinding media contained in said vessel, an agitation shaft driven by driving means and disposed in the central portion of said vessel and a single agitation rod mounted on the tip end of the agitation shaft at a right angle to said agitation shaft, such that said agitation rod is disposed at a point spaced vertically from the bottom of the vessel by a distance corresponding to 5 to 20% of the inner diameter of said vessel, the length of said rod corresponding to 65 to 95% of the inner diameter of said vessel and the thickness of said agitation rod being 2 to 5% of the length of the agitation rod, said agitation rod having a peripheral velocity at its tip to produce laminar flow in the suspension.
Dependencies are inferred from the claim text.