Roll crushers and mills (Design review)

Abstract

The classification of roll crushers and mills for the disintegration of lumpy and loose materials processed at the enterprises of chemical, mining, construction, food and electrode industries, as well as in metallurgy, has been developed. A critical review of the most typical designs of roll crushers and mills proposed by scientists, designers and inventors of the world’s leading countries has been performed. The designs are analyzed according to the number of rolls, type of roll surface, shape of rolls, relative speed of working surface of rolls, possibility of roll surface temperature control, availability of additional working elements, as well as roll surface material. Analysis of the designs of roll crushers and mills for the disintegration of lumpy and granular materials shows that they exist in numerous standard sizes, but conventional two-roll crushers with smooth, fluted and toothed rolls remain the most demanded by industry. In this case, the most promising area for improvement of roll crushers and mills is to develop designs of crushing elements for the working surface of rolls and materials for their manufacture. In the future, it is planned to analyze the designs of other types of crushing equipment widespread in industry, such as jaw crushers and drum mills, as well as ways to improve their efficiency.