In order to reduce the energy consumption of air flow and improve the production efficiency ultrafine vertical mill, we must first understand the reasons.

Generally speaking, the forms of solid particles accelerated by high-speed airflow are mainly composed of the following three methods:

Airflow particle acceleration nozzle: the airflow and particles are fully mixed and then accelerated by the nozzle, which can make the particles obtain a very high speed (almost the same as the airflow speed), but the material has serious wear on the inner wall of the nozzle, so it is rarely used in practice.

Syringe accelerating particles: high speed (supersonic) airflow and particles are mixed and accelerated in the mixing tube, and the particles get higher speed, but the material has serious wear on the mixing tube.

Free air acceleration particles: particles enter the high-speed air beam as a free falling body to be accelerated. At this time, there is only high-speed air flow through the nozzle, and the wear is very small. However, due to the low falling velocity (transverse) of particles, it is difficult to get into the center of the air beam (high-speed air flow) and obtain high velocity.