Optimization of Metal Tapping Cycle Operation at INALUM

Abstract

PT Indonesia Asahan Aluminium (Persero) "INALUM" as a Holding State-Owned Mining Industry since November 27, 2017 has passed through long journey until now. As Holding Company, INALUM must maintain and improve competitiveness and the culture of continuous improvement. One of the improvements continuously maintained since joint venture Company between Indonesian Goverment and Japan Consortium is Optimization of Metal Tapping (MT) cycle Operation. The objective of the improvement is to minimize equipment utilization such as Anode Changing Crane (ACC), Ladle and Molten Transport Car (MTC), Minimize man hour, Hidrogen Flouride (HF) gas Emission and improve safety condition. By doing Site observation and direct measurement to understand existing system, analized the data, design new system and take into account of new system to calculate cost benefit analysis and implemented the new system. INALUM has managed to get some benefits from production optimization through motion and time study for lean manufacturing. And the benefits are; optimization of MT cycle operation has successfully reduced ladle utilization for MT until 14 Ladles/day, ACC operation hour 20.5 %, MTC operation hour for ladle transportation 10.5%, Man hour 20.5% for MT work and 10.5 % for ladle transportation, HF Emission gas 20.5 % that caused by MT Operation, balancing operation work and improve safety condition.