Air-dried limestone was crushed continuously in a laboratory single-toggle Blake jaw crusher designed to provide a throw of 228 mm. The lower opening close set was 102 mm and the maximum bottom opening was 330 mm. The gape was 813 mm and the width of hopper 1067 mm. 90% of the ore commenced crushing 200 mm from the bottom of the crusher. The Bond Index was estimated as 15 kWh/t. Assuming that the density of the limestone was 2.6 t/ m. determine: 1. 2. 3. the optimum RPM of the toggle the maximum annual capacity of crusher with 99% availability Power consumption at the optimum speed

Air-dried limestone was crushed continuously in a laboratory single-toggle Blake jaw crusher designed to provide a throw of 228mm. The lower opening close set was 102mm and the maximum bottom opening was 330mm. The gape was 813mm and the width of hopper 1067 mm. 90% of the ore commenced crushing 200mm from the bottom of the crusher. The Bond Index was estimated as 15kWh/t. Assuming that the density of the limestone was 2.6Vm3, determine: 1. the optimum RPM of the toggle 2. the maximum annual capacity of crusher with 99% availability 3. Power consumption at the optimum speed