[SMM Aluminum Flash News] Rio Tinto Plans Restart of NZAS Line 4 Potline in New Zealand

Published: May 28, 2026 09:48

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Rio Tinto plans to restart the idle Line 4 potline at the New Zealand Aluminum Smelter (NZAS) in Tiwai Point and has signed a letter of intent with Contact Energy for a power purchase agreement. If finalized, the potline could resume operations in 2030. The line has been idle since 2020 and is expected to add about 30,000 tones of aluminum production annually once fully operational. Rio Tinto said the restart could contribute around NZD 100 million (about USD 59 million) annually to the local economy while strengthening New Zealand’s aluminum industry and energy cooperation.

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