chapter 4. jaw crusher 4. introduction the first stage of size reduction of hard and large lumps of run of mine (rom) ore is to crush and reduce their size . Aplications - PT. Rantai Mulia Kencana. BELT CONVEYOR FOR COAL MINING 1000 TPH. BELT CONVEYOR FOR STONE CRUSHER 500 TPH. COAL CRUSHER CAP 500 TPH.