Analisis Efisiensi Laju Pemindahan Tanah pada Aktifitas Penggalian Bijih Timah oleh Kapal Keruk 11 Karimata Unit Penambangan Laut Bangka PT. Timah (Persero), Tbk

PT Timah (Persero) Tbk, work unit Bangka Sea Mining Unit (UPLB) Bangka Regency North District Belinyu now implementing open pit methods alluvial (offshore) with mining system using Dredger, Bucket Wheel Cutter Suction and Dradge. Dredger 11 Karimata is one Dredges are still being used by PT Timah (Persero) Tbk, Bangka Sea Mining Unit to conduct Mining Operations.
Dredger 11 Karimata have a budget plan Production (RKAP) which is used as a benchmark for the vessel to operate which contains details of production targets and work time production tools. Dredging or excavation is the first process of the processes in the tin mining Dredger 11 Karimata. Factors affecting the dredging process is the depth or thickness of layers, the progress of the excavation or trap in the amount of 4.8 m, the emphasis ladder while digging in the amount of 0.3 m, which is next to the wire speed of 6.9 m / min. Working time is one of the factors that affect the production of tin ore. The smaller the effective time of the production also will be smaller.
In January 2016 the dredger 11 Karimata reach land transfer rate of 234 m3 / h with soil removal efficiency rate of 56.03%. While the realized working hours is 441 hours. To increase the yield at Dredger (KK) 11 Karimata necessary efforts to optimize the treatment of the excavation tool by mechanical officer. Increasing yield at Dredger (KK) 11 Karimata necessary efforts to optimize the treatment of the excavation tool by mechanical officer. Dredger 11 Karimata is the oldest ship owned by PT Timah (Persero) Tbk, so the age factor appliance is one of the factors that led to the lack of effective excavation process.