the working principle of jaw crusher primary rough
most of the export ore is crushed and beneficiated, the primary crusher is a 60 by 102 Nordberg extra-heavy duty gyratory, and the largest rock that can be handled is approximately 1400 mm by 1100 mm by 2500 mm. At South Plant, the primary crushers that had been in-stalled were an Allis Chalmers 74 by 54 gyratory and an Cost-efficient Transport for Open-pit Mines. An innovative technological approach to skip haulage could optimize costs and energy efficiency in hard rock mines. Open-pit metal mines are often shaped like an inverted cone, with the ore and overburden being drilled and blasted, then loaded and transported by shovel-and-truck systems.