Nanshan Aluminium International expands Indonesian alumina operations

The 2 million t/y expansion was completed in two phases -- 1 million t/y was commissioned in the third quarter of 2025, while the remaining 1 million t/y became operational on December 20 2025, according to the company announcement.

Listed on the Hong Kong Stock Exchange and incorporated in the Cayman Islands, Nanshan Aluminium International is headquartered in Hong Kong. The company began construction of its alumina refinery in Indonesia in 2017 through its subsidiary and local operator, PT Bintan Alumina Indonesia.

The previously commissioned 2 million t/y capacity was also developed in two phases, with the first 1 million t/y coming on stream in the second quarter of 2021 and the second 1 million t/y in the fourth quarter of 2022.

Alongside the alumina capacity expansion, the company has completed and upgraded key supporting infrastructure for the refinery. A modern wharf with a handling capacity of 70,000 tonnes, equipped with efficient loading, unloading and conveying systems, has been completed and put into operation.

In addition, the company has expanded its coal-to-gas plant, adding annual production capacity of 700 million cubic metres to meet the requirements of expanded alumina output.

The alumina refinery, located in Bintan Industrial Park in Indonesia's Riau Islands province, is supported by a comprehensive set of facilities, including a power plant, deep-water wharf, self-built reservoir, and coal-to-gas plant.

To further utilize alumina resources and reduce aluminium production costs, the parent company, Shandong Nanshan Aluminium, has also invested in primary aluminium capacity of 250,000 t/y and carbon capacity of 260,000 t/y in the same industrial park through other wholly-owned subsidiaries, though progress on these projects has not been disclosed.

Written by Iris Pang, pangjunyu@mysteel.com

Edited by Vivian Yang, yangzhenqi@mysteel.com