New Zealand’s Aluminium Smelter

TIWAI POINT, SOUTHLAND, NEW ZEALAND

New Zealand’s Aluminium Smelter (NZAS) converts alumina into aluminium using renewable hydroelectricity, resulting in one of the lowest carbon footprints for an aluminium smelter in the world.

The smelter is located on Tiwai Peninsula in Southland and the majority of the plant's alumina is supplied from our Yarwun operation and Queensland Alumina Limited refineries. Around 90% of the aluminium produced at NZAS is exported.

NZAS is a joint venture owned by Rio Tinto (79.36%) and Japan’s Sumitomo Chemical Company (20.64%). 

In July 2020, we announced the conclusion of a strategic review of the smelter and a decision to wind down operations by August 2021 due to high energy and transmission costs. Following negotiations resulting in a new electricity agreement, in January 2021 we committed to continue operating the smelter for an additional four years until December 2024.

The extension provides certainty to employees, the local community and customers while providing more time for all stakeholders to plan for the future.

Innovation at NZAS

Innovation is at the heart of our operation. Our General Manager’s Innovation Awards, held three times per year, recognise creative and practical ways to improve our workplace by reducing risk and adding value.

For example, we have used virtual reality (VR) for more than a decade to create safer, more productive and effective processes. It has been applied to improve training, enrich the understanding of communities about the site, and improve the planning of projects.

Recently we developed an application using VR technology to re-enact an incident. This pioneering use of VR helped to answer questions about the incident, increase learning and improve safety.

We also have a “Leading for Safety” project that pioneered our Vehicle Prestart Check App. This app is being used in production on 40 vehicles – replacing the former paper-based approach. The app allows drivers to use in-vehicle tablets to perform quick and easy checks; it notifies drivers immediately with on-board warnings and guidance if there are any failed checks. The app also provides consolidated reports on the status of each fleet's pre-start checks at a glance.

Low Carbon Aluminium

NZAS is proud to have its metal marketed under Rio Tinto's RenewAl brand. As the world moves towards a lower carbon future, the RenewAl brand can help NZAS take advantage of growing demand for high-quality aluminium to be used in more sustainable, low-carbon products. RenewAl certifies NZAS metal as being some of the lowest carbon in the world.

In 2019, the Aluminium Stewardship Initiative (ASI) granted its Performance Standard and Chain of Custody certifications to our NZAS aluminium smelter. ASI certification means customers can be assured that the aluminium they purchase has been produced to the highest environmental, social and governance standards, ranging from greenhouse gas emissions to human rights.

NZAS Communities

We strive to establish and maintain community relationships that positively contribute to the quality of life where we live and work, and by supporting partnerships that are mutually beneficial and deliver long-term, sustainable results.

We have been the major sponsor of the annual NZAS Southland Science & Technology Fair since 2003. Students are required to investigate a topic of their choice using a scientific method of hypothesis, method, test and conclusions.

We also have a longstanding partnership with Southland Girls' High School, designed to encourage students to pursue careers in engineering and science. Each year we host students at the smelter for a week so they can learn about career options and work on a project gathering, testing and analysing data. 

We sponsor the Kiwi Can programme operating in local schools, the programme aims to equip young Southlanders with a sense of self-worth and self-confidence, valuable life skills, an ability to take responsibility for their actions and a "can-do" attitude to life.