Evaluation of Crusher Productivity in Coal Processing Plant in Pt. Bara Tabang, Kutai Kartanegara District, Province of East Kalimantan, Indonesien

PT. Bara Tabang is one of the companies engaged in coal mining , L ocated in Tabang District and Kutai Kartanegara District, East Kalimantan Province with a production target for January of 806,000 tons. From the observations, the actual productivity of crusher 1 was 598.50 tons / hour, with actual production time of 558.46 hours capable of producing coal at 334,236 tons, while the actual productivity of crusher 2 was 791,78 tons / hour, with actual production time amounting to 498.47 hours capable of producing coal of 394,680 tons it can be concluded that the production target has not been achieved. Then the analysis and calculation of the time of obstacle were carried out so that the addition of time for crusher one was 29.32 hours so that the production of crusher 1 became 351.784 tons while the addition of time for crusher 2 was 76, 36 hours so the production of crusher 2 became 455, 140 tons. So the total production of crushers for January was 806, 924 tons. Index Terms : Coal, Crusher, Productivity