초록 ▼

Particles are cooled at a particle introducing section by a cooling device. A vapor of modifying agent for modifying the particles is produced by heating the modifying agent in a vapor producing chamber by a heating device. Further, a supersaturated vapor of the modifying agent is produced around th

Particles are cooled at a particle introducing section by a cooling device. A vapor of modifying agent for modifying the particles is produced by heating the modifying agent in a vapor producing chamber by a heating device. Further, a supersaturated vapor of the modifying agent is produced around the particles by mixing the cooled particles with the vapor of the modifying agent. The modifying agent condenses on the surface of the particles by the production of the supersaturated vapor, and consequently, a film of the modifying agent is formed on the surface of the particles. A thick film of the modifying agent can be formed if this film forming step is carried out repetitively. Thus, modified particles having formed thereon a thick uniform film of the modifying agent can be produced by quite a simple manipulation in a very short time.

대표청구항 ▼

1. A particle modifying apparatus comprising:a mixing section for mixing cooled particles with a saturated vapor of a modifying agent for modifying the particles to let the modifying agent condense on a surface of the particles; a particle introducing section for introducing the particles into said

1. A particle modifying apparatus comprising:a mixing section for mixing cooled particles with a saturated vapor of a modifying agent for modifying the particles to let the modifying agent condense on a surface of the particles; a particle introducing section for introducing the particles into said mixing section; particle cooling means for cooling the particles in said particle introducing section so as to be capable of producing a supersaturated atmosphere of the modifying agent surrounding the particles when the particles are mixed with the saturated vapor of the modifying agent; and a modifying agent vapor supplying section for turning the modifying agent into the saturated vapor prior to supplying the saturated vapor of the modifying agent to said mixing section, whereby the particle introducing section and the modifying agent vapor supplying section introduce the cooled particles and the saturated vapor of the modifying agent separately into the mixing section.