Abstract Scope |
Inalum is a state-owned company located in Indonesia that produces ingot, alloy and billet. Ingots are divided into two product categories. Ingot with lower Fe content (HPM) has higher selling price. Apart from that, HPM pots can also be used to produce alloy. Some efforts are being made to increase the HPM pots. Firstly, by analysis the parameters that affect the number of HPM pots such as metal height, bath height, bath temperature, acidity, anode condition, Fe in alumina, and recycle material. The strategies implemented include modifying the teeth blade, optimizing AC cycle, intensive measure of bath height, create localization of HPM central station, as well as standardizing the metal height and acidity of the pots. This strategy increasing ratio of HPM pot from 14% in 2017 to 20 % in 2021 with the highest number of HPM pot in a day is 162 pots in 2021. |