The influence of the weighted average diameter of the ball on the particle size of the final product

Objective. Currently, cement is crushed in mills to a specific surface area of 2500-3000 and 3500-4500 cm2/g or more. Further grinding of clinker sharply worsens the properties of the resulting product. The relevance of the topic is due to the increased interest in reducing material and energy costs in the process of clinker grinding. The purpose of the work is to study the effect of different assortment of grinding media and weighted average ball diameter on the particle size of the final product, performing particle size analysis by particle diffraction. Method. To obtain reliable experimental data, a specially developed model of the grinding unit was used. Analysis of particle size by diffraction or spatial distribution (scattering spectrum) of scattered light was carried out using a laser analyzer. Result. A research methodology has been developed that meets the modern capabilities of experimental technology. Experimental studies have been conducted on clinker grinding in a laboratory mill. The combined effect of different assortments of grinding bodies and the average weighted diameter of the ball on the particle size of the final product has been determined. Conclusion. Studies of the curves of the final product obtained using different weighted average ball diameters have shown that large impact energy is not required to grind small grains; the diameter of the grinding bodies should decrease as the grain size of the material decreases. Therefore, the balls must have a minimum diameter, but sufficient to destroy the particles of the material.