ON THE WEAR MECHANISM OF HIGH-CHROMIUM GYRATORYCRUSHER MANTLE LINING IN TERMS OF THE ASSESSMENTOF THE USED MATERIAL

Abstract

After the rock is excavated in bulky chunks, it must be processed into fractions usable by diverse branches ofindustry. There are many approaches to achieving a fine aggregate, and the gyratory crusher is often preferable.Alas, since its working surfaces are subjected to heavy loads of abrasive material, the lining of the gyratorycrusher is prone to specific geometry degeneration mechanisms. The authors subjected the mantle lining to aseries of tests, such as metallurgical microstructure analysis, chemical composition and hardness evaluationand X-ray examination. Although most mantles are manufactured from the high-manganese Hadfield steelfamily, the lining was fabricated from high-chromium hypoeutectic white cast steel with a white iron structure.The difference in the chosen material's chemical composition resulted in an uncommon wear mechanism withvisible inclined craters emerging in the lower part of the cone, where erosive, dynamically-moving particleswere concentrated.