Tasmania's Liberty Bell Bay manganese smelter has ceased operations immediately after a consortium engaged to acquire the facility withdrew from the deal.
The closure, confirmed by administrator EY-Parthenon, results in the loss of approximately 200 jobs at the site, which was formerly owned by metals tycoon Sanjeev Gupta.
The failure to secure a buyer marks the end of efforts to keep the plant running under new ownership.
The abrupt shutdown highlights the challenges facing regional industrial assets in a shifting metals landscape.
With no immediate replacement for the lost production capacity, the closure adds to a broader trend of consolidation and retreat in the Australian and New Zealand industrial sectors.
The loss of the smelter removes a key node in the regional manganese supply chain, potentially tightening local availability for downstream users.