Patent ID: 9669412
Date: 2017-06-06
CPC Classifications: B02C

Claim:
1. A micronizing device for fluid jet mills, comprising: a containing body internally delimiting a substantially cylindrical grinding chamber; a plurality of nozzles, each presenting a mouth which opens onto a radially internal side wall of the grinding chamber; a supply duct for material to be micronized, opening into the grinding chamber; at least one injection duct for pressurized fluid, in fluid communication with said nozzles; wherein said nozzles present a pressurized fluid injection direction (X-X) which is tangent to an imaginary circle included inside the grinding chamber; characterized in that the radially internal side wall presents, at each nozzle, a first portion which is substantially perpendicular to the injection direction (X-X) of the respective nozzle; wherein the radially internal side wall presents second curved portions placed between the first portions; wherein the second curved portions connect two consecutive first portions to create an annular saw tooth profile; wherein each of the second portions has one or two concave parts and only one convex part.