Method of improving quality of surface of solid particles and apparatus thereof
AssigneeNara Machinery Co., Ltd.
InventorsYorioki Nara, Masumi Koishi
Life of this patent
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Abstract
A method of improving the quality of the surface of solid particles is disclosed. The method includes fixing material different from the solid particles to the surface of the solid particles by the use of an impact striking device. The material fixed to the solid particles can be other solid particles or particles contained in a liquid, which forms a film.
Claims28
An apparatus for improving the surface quality of solid particles which comprises
- a collision chamber,
- at least one inlet means for introducing solid particles into said collision chamber,
- a collision surface disposed within said collision chamber,
- a rotating plate rotatably disposed within said collision chamber, said rotating plate being provided with a plurality of impact pins which extend from the surface thereof,
- means for rotating the rotating plate at a high peripheral speed, thereby generating a strong circulating gas stream within said collision chamber as well as impact pins with a high impact surface,
- a self-circulating circuit means provided for conducting and circulating at least a portion of the circulating gas stream generated in said collision chamber due to the rotation of said rotating plate, said self-circulating conduit communicating with said collision chamber for both removing the gas stream containing said solid particles from said collision chamber and returning it to said collision chamber so that said solid particles can repeatedly receive the impact action created by the impact pins, the collision surface and the speed of the circulating gas stream, and
- means for removing solid particles having an improved surface quality from the collision chamber.
A method for improving the surface quality of solid particles by impacting the surface of said solid particles with fine particles smaller in size than said solid particles, utilizing a collision chamber and a rotating plate having a plurality of impact pins extending from the surface thereof, said rotating plate being rotatably disposed within said collision chamber, which comprises
- introducing said solid particles and fine smaller particles into said collision chamber,
- rotating the rotating plate at a peripheral speed of 5 to 160 m/sec to create a high speed gas flow within said collision chamber, said gas flow serving to conduct and circulate said solid particles and fine smaller particles within said collision chamber to form a circulating cycle of enormous speed and circulation frequency whereby the smaller fine particles are caused to impact upon and be fixed to the surface of the solid particles thereby improving the surface quality of the solid particles.
Dependencies are inferred from the claim text.