Smelting Plant

In producing a range of integrated aluminium products that are profitable, safe and environmentally friendly, there are several key components for the process to run smoothly. These components include a carbon plant that plays a role in the production of anode blocks, a reduction plant that utilizes renewable hydroelectric power to reduce alumina into molten aluminium through electrolysis process, a casting plant to cast aluminium, transmission lines and substations to provide power sources, and storage yards to store aluminum products.

The Carbon Plant that produces anode blocks consists of a Raw Carbon Plant, a Roasting Plant and an Anode Assembling Plant. At the Raw Carbon Plant, coke and hard pitch are mixed and formed into anode blocks and baked to a temperature of 1,250 degrees Celsius at the Anode Roasting Plant. Then in the Anode Assembling Plant, a rod is attached to the baked anode block using molten cast iron. The anode block serves as the electrode in the Reduction plant.

Address

Kuala Tanjung

 

INALUM’s Reduction Plant has a maximum production capacity of 250,000 tons per year, supported by 510 smelting pots. This facility is where the reduction process takes place, converting alumina into molten aluminium through electrolysis powered by green energy sourced from hydroelectric power plants. The raw materials used in this process include alumina, cryolite, carbon anodes, and aluminium fluoride. Additionally, metal tapping and anode changing are key operational processes, each governed by specific control parameters to ensure production stability at the reduction plant.

Address

Kuala Tanjung

 

Liquid aluminum that has been melted in the Reduction Plant will then be taken to the Casting Plant. In this plant, all liquid aluminium will be printed in INALUM's three main products, namely Aluminium Ingot, Aluminium Billet, and Aluminium Alloy.

Address

Kuala Tanjung

 

The Storage Yard serves as the central facility for storing all of INALUM’s aluminium products. This is where the products are held prior to being delivered to INALUM’s customers.

Address

Kuala Tanjung

 

The electricity generated by Siguragura and Tangga power stations is channeled through a 120 km transmission network with 271 towers and a voltage of 275 KV to Kuala Tanjung.

Address

Kuala Tanjung

 

Through the Kuala Tanjung substation, the voltage is distributed to the three reduction furnace buildings and other supporting buildings through 2 silicon rectifier units with DC 37 KA and 800 V.

Address

Kuala Tanjung