South Africa's Last Manganese Smelter Goes Dark — Global Supply Jitters Begin

July 6, 2026 — Sarah Johnson 3 min read

The final operational manganese smelter in South Africa has ceased production, industry sources confirmed Wednesday, leaving the world's largest manganese-producing nation without domestic processing capacity. The closure marks a stark reversal for South Africa's mining sector, which once dominated global ferroalloy output. Traders and steelmakers are now bracing for potential supply disruptions as spot markets absorb the news.

Industrial Lifeline Cut

South Africa supplied roughly 30 percent of global manganese ore output last year, according to data from the International Manganese Institute. However, the closure of the last smelter means that ore extraction will now flow entirely toward export markets rather than domestic value addition. The plant, located in the Northern Cape province near Kathu, employed hundreds of workers and had operated for more than two decades. Its shutdown follows years of mounting electricity costs and falling ferroalloy prices that squeezed profit margins to unsustainable levels.

Glencore Merafe Venture Under Scrutiny

The Glencore Merafe Chrome Venture, one of South Africa's largest ferrochrome producers, has faced similar pressures across its chrome operations, though its specific involvement in manganese processing remains unclear. Industry analysts noted that the venture's chrome smelters have reduced output intermittently over the past eighteen months amid power supply constraints. The manganese smelter closure underscores a broader retreat from energy-intensive processing as Eskom, South Africa's state utility, continues to implement rolling power cuts that make consistent furnace operations difficult.

Electricity Costs Compound Pressure

Eskom raised industrial electricity tariffs by over 18 percent last April, adding millions of rand to monthly production costs for energy-heavy operations. Smelter operators have long argued that South Africa's power pricing has eroded the competitiveness of domestic ferroalloy production against competitors in China and Indonesia. The government has so far resisted calls to grant special tariff exemptions for mining-intensive industries, citing strain on the national power grid.

China's Role in the Shift

Chinese manganese smelters have expanded rapidly over the past decade, building massive processing complexes powered by subsidized coal electricity. That growth has flooded global markets with cheaper ferroalloys, making it difficult for higher-cost producers in South Africa to compete. China currently processes more than 60 percent of global manganese ore, according to customs data, even as its own mines produce relatively low-grade ore that requires blending with higher-quality imports from South Africa and Australia.

Market Reaction Begins

Ferroalloy exchanges reported modest price movements following the closure confirmation, with manganese alloy contracts ticking up by less than 2 percent in early Asian trading. Market participants cautioned against overreaction, noting that ore exports could continue uninterrupted. However, traders in Singapore and London flagged the closure as a signal that South African industrial capacity is contracting faster than many analysts had projected. Some steel producers are already seeking to lock in longer-term supply agreements with alternative producers in Gabon and Brazil.

What Comes Next

South Africa's Department of Mineral Resources and Energy faces mounting pressure to address the structural challenges facing the ferroalloy sector. Industry groups have called for a summit with power regulators, but no date has been announced. Investors in mining equities will watch for earnings impact statements from companies with exposure to South African manganese and chrome assets. The trajectory of global steel demand, particularly in construction and automotive manufacturing, will ultimately determine whether any mothballed capacity can be revived or whether South Africa's processing sector faces permanent decline.