A device for separating and recovering flat-plate catalyst powder and a method for determining a wear ratio are provided. The device includes a powder separation unit and a powder recovery unit, a powder accumulation bin is respectively connected with a shell and a catalyst powder outlet, a cyclone outlet is configured on an inner side of a recovery shell, and a primary filter and a secondary filter are configured on an inner side wall of the recovery shell.

An apparatus suitable for separating particles and methods for using such apparatus are provided.

An apparatus suitable for separating particles and methods for using such apparatus are provided.

A pneumatic classifier includes: a casing having a ceiling wall and an annular wall; a classifying plate disposed such that a surface of the classifying plate faces the ceiling wall; a classifying chamber constituted between the ceiling wall and the surface of the classifying plate; a gas supply section configured to supply gas into the classifying chamber to generate a whirling stream; a feed powder supply section configured to supply feed powder to the whirling stream; a fine powder discharging port provided at a central part of one of the ceiling wall of the casing and the surface of the classifying plate; a coarse powder discharging port opening along an outer periphery of the classifying chamber on a side of the ceiling wall or the surface of the classifying chamber; and a groove portion provided in at least one of the ceiling wall or the surface of the classifying plate.

A pneumatic classifier includes: a casing having a ceiling wall and an annular wall; a classifying plate disposed such that a surface of the classifying plate faces the ceiling wall; a classifying chamber constituted between the ceiling wall and the surface of the classifying plate; a gas supply section configured to supply gas into the classifying chamber to generate a whirling stream; a feed powder supply section configured to supply feed powder to the whirling stream; a fine powder discharging port provided at a central part of one of the ceiling wall of the casing and the surface of the classifying plate; a coarse powder discharging port opening along an outer periphery of the classifying chamber on a side of the ceiling wall or the surface of the classifying chamber; and a groove portion provided in at least one of the ceiling wall or the surface of the classifying plate.

A system for processing compounds having constituent materials of different mechanical characteristics to extract their constituent materials. The system includes (a) a grinder configured to grind a bulk compound material into an initial mixture of tiny particles; (b) a preimpact separator configured to separate the particles into two groups based on their respective mechanical properties, one group being a preimpact mixture comprising the compound particles; (c) a kinetic impactor configured to impact, via an acoustic shockwave, the compound particles of the preimpact mixture, thereby creating a postimpact mixture comprising (i) subparticles of 1.sup.st-constituent-material and (ii) reduced-compound particles comprising a 2nd constituent material; and (d) a postimpact separator configured to separate the reduced compound particles from the postimpact mixture based on a mechanical property.

A system for processing compounds having constituent materials of different mechanical characteristics to extract their constituent materials. The system includes (a) a grinder configured to grind a bulk compound material into an initial mixture of tiny particles; (b) a preimpact separator configured to separate the particles into two groups based on their respective mechanical properties, one group being a preimpact mixture comprising the compound particles; (c) a kinetic impactor configured to impact, via an acoustic shockwave, the compound particles of the preimpact mixture, thereby creating a postimpact mixture comprising (i) subparticles of 1.sup.st-constituent-material and (ii) reduced-compound particles comprising a 2nd constituent material; and (d) a postimpact separator configured to separate the reduced compound particles from the postimpact mixture based on a mechanical property.