Apparatus for the micronization of powdered material with the capacity to prevent incrustations

A process for micronizing a powdered material or product (P) or a material containing particles by means of a micronizer mill with jets of a first gaseous fluid (A), avoiding at the same time the formation of incrustations and/or powdered material accumulations inside an inner micronization chamber of the micronizer mill, the powdered material or product being micronized in the micronization chamber the method comprising the following steps:

• providing the micronizer mill comprising the micronization chamber;
• configuring the inner micronization chamber, of the micronizer mill, in such a way that it is delimited by respective walls that have at least one porous or filtering portion;
• and
• feeding a regular flow (f1) of a second gaseous fluid (F) through the porous or filtering portion, from the outside towards the inside of the inner micronization chamber,
• the micronizer mill further comprising:
• an intermediate chamber or hollow space, of annular shape, arranged between an outer pressure chamber, of annular shape, and the inner micronization chamber, of circular shape, with the intermediate chamber being configured to be fed by the second gaseous fluid (F) directed to cross the porous or filtering portion;
• wherein the respective walls comprise a first wall, of annular shape, separating the intermediate chamber from an outer pressure chamber;
• and
• a second wall, of annular shape, surrounding and externally delimiting the inner micronization chamber and separating the intermediate chamber, of annular shape, from the inner micronization chamber, of circular shape,
• wherein the second wall, of annular shape comprises the porous or filtering portion configured to be crossed by the second gaseous fluid (F) in order to avoid the formation of incrustations and/or powdered material accumulations within the inner micronization chamber.

An apparatus for micronization of a powdered material or product (P), or a material containing particles, comprising:

• a micronizer mill with jets of a first gaseous fluid (A);
• wherein the micronizer mill comprises an inner micronization chamber of circular shape, in which the powdered material or product (P) is micronized through collisions between the respective particles caused by the jets (G) of the gaseous fluid (A);
• wherein the micronization chamber of the micronizer mill is delimited by respective inner walls which have at least one porous or filtering portion configured to be crossed by a regular flow (f1), of a second gaseous fluid (F), directed toward the interior of the micronization chamber, so as to avoid the formation of incrustations and/or powdered material accumulations within the micronization chamber,
• wherein the micronizer mill in turn comprises in addition to the inner micronization chamber, of circular shape:
• a channel system configured to be fed by the first gaseous fluid (A), under pressure, which channel system extends annularly around the inner micronization chamber and comprising a plurality of channels directed to convey the first gaseous fluid (A), under pressure, inside the inner micronization chamber, so as to generate the jets (G) that cause the micronization of the powdered material (P);
• the apparatus for micronization further comprising:
• an intermediate chamber or hollow space, of annular shape, arranged between a ring of the channel system and the inner micronization chamber, the intermediate chamber configured to be fed by the second gaseous fluid (F) directed to cross the porous portion;
• and
• a first wall of the inner walls having an annular shape and surrounding and externally delimiting the inner micronization chamber and separating the intermediate chamber, of annular shape, from the inner micronization chamber, of circular shape,
• wherein the first wall comprises the porous or filtering portion provided to be crossed by the second gaseous fluid (F), in order to avoid the formation of incrustations and/or powdered material accumulations within the inner micronization chamber.