Plane model of particle separation in disintegrators with internal circulation of the grinding material

Abstract

Abstract The paper offers a method for evaluating the separation process of fine particles in the design of a classifier of a disintegrator with internal circulation of the dispersed material. Disintegrator type mills are fairly common in the construction materials industry and related industries. However, there are a number of technological problems with this type of equipment, which hinder their wider use in the production of dispersed powders with a high specific surface area. One of these problems is the presence of under-ground (coarse) particles in the volume of the finished product of a given fraction. The quality of classification is evaluated taking into account the velocity parameters of fine particles in the classifier device built into the disintegrator body. A new design of a gravity-type classifying device is considered, which contributes to the efficient return of large substandard particles to the finishes grinding in the disintegrator grinding chamber. The publication provides a method for determining the speed parameters of particle dynamics in the chamber of the classifier device of a disintegrator mill, and also presents a model for numerical calculation of the efficiency of the classifier device. This theoretical method of assessing the quality of separation of particles in the disintegrator is to define a measure of the degree of separation, to assess the effectiveness of recycle coarse fractions of grinding material powder: degree of operational separation shows the ability of disintegrator to operate in various process modes, and sets the granulometric boundaries for obtaining a particular fraction after grinding in the disintegrator.