Corporate Update: South32 Limited Places Mozal Aluminium Smelter on Care and Maintenance
South32 Limited announced on 15 March 2026 that its Mozal aluminium smelter in Mozambique will be placed on care and maintenance. The decision follows extended negotiations with the Mozambican government and the South African power supplier Eskom, during which South32 was unable to secure a sustainable power supply for the smelter beyond the current month.
Context and Rationale
Mozal, a joint venture in which South32 holds a 63.7 percent stake, has operated for 25 years as the largest aluminium smelter in sub‑Saharan Africa. The plant has been a significant contributor to Mozambique’s economy, generating employment, local procurement, and tax revenue. Nevertheless, the smelter’s operational viability hinges on reliable and cost‑effective electricity.
Despite concerted efforts, the power procurement agreement with Eskom could not meet the smelter’s demand profile, and the Mozambican government expressed concerns about long‑term supply security and price escalation. With the power contract set to expire at the end of March 2026, South32 concluded that maintaining the smelter in an operating state was no longer feasible without jeopardizing financial performance and shareholder value.
Financial Impact
South32 disclosed that one‑off costs associated with the transition—including employee separation packages and contract terminations—are estimated at approximately US$60 million. Ongoing care and maintenance obligations are projected at around US$5 million per year. These figures reflect the company’s commitment to responsible asset stewardship and to mitigating the impact on local stakeholders.
Operational Consequences
Production of primary aluminium at Mozal will cease. The alumina feedstock, sourced from South32’s Worsley refinery, will be redirected to third‑party customers at index‑linked prices. This strategic realignment allows the company to preserve value in its upstream operations while curtailing losses associated with an unprofitable smelting facility.
Strategic Implications
South32’s decision underscores a broader industry trend in which aluminium producers are recalibrating their asset portfolios in response to fluctuating energy markets and tightening environmental regulations. By divesting from a high‑energy‑intensity operation that no longer aligns with its cost structure, South32 positions itself to focus on core competencies—mineral exploration and primary metal production—while maintaining a responsible approach to community and environmental commitments.
The company reiterated its dedication to developing natural resources responsibly and to supporting the communities in which it operates, signalling that it will continue to engage with local stakeholders during the transition phase.
Market Perspective
The move reflects a growing recognition across commodities sectors that power costs are becoming a decisive factor in determining the economic viability of large‑scale industrial projects. As renewable energy penetration increases and electric prices rise in many emerging markets, companies like South32 are likely to reassess the feasibility of energy‑intensive operations. Moreover, the ability to redirect alumina to alternative customers preserves revenue streams and demonstrates operational agility in a fluctuating market environment.
South32’s experience at Mozal provides a case study for firms operating at the intersection of mining, smelting, and energy supply. It highlights the importance of robust power procurement strategies, diversified market access for feedstock, and proactive stakeholder management when navigating complex regulatory and economic landscapes.
