| 摘要 |
In an apparatus and a method, a suspension of fluid using a fluid under supercritical state as a dispersion medium is pulverized to obtain fine particles. Solid particles are suspended in the fluid under supercritical or subcritical state, which is in a gaseous state at normal temperature. Thus, pressure on the suspension fluid is increased, and the suspension fluid under high pressure thus obtained is injected through a nozzle and collided at high speed to disperse and pulverize. Then, pressure on the suspension fluid is reduced, and the fluid under supercritical or subcritical state is vaporized and solid particles are separated. As a result, efficient pulverizing can be performed, and it is possible to prevent agglomeration of particles in drying process.
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