Manganese — The Steel Strengthener

Manganese and the Corridor

Manganese is the fourth-most consumed metal globally, essential for steelmaking where it serves as a deoxidiser and alloying element. Approximately 90% of manganese demand comes from the steel industry. However, emerging battery chemistries — particularly lithium-manganese-iron-phosphate (LMFP) — are creating new demand drivers aligned with the energy transition.

The DRC's Kisenge manganese deposit in Haut-Katanga was included in the shortlist of mining assets presented to US investors under the December 2025 US-DRC Strategic Partnership agreement. Development of Kisenge would add manganese to the corridor's mineral portfolio, diversifying beyond copper and cobalt.

Manganese in Battery Chemistry

Manganese is the quiet disruptor of battery chemistry. Lithium manganese iron phosphate (LMFP) batteries — an evolution of the LFP chemistry that currently dominates the Chinese EV market — promise higher energy density than standard LFP at lower cost than nickel-rich chemistries. CATL, the world's largest battery manufacturer, is scaling LMFP production, and analysts project LMFP could capture 20-30% of the EV battery market by 2030.

If LMFP adoption follows this trajectory, manganese demand for batteries could increase from approximately 30,000 tonnes in 2024 to over 300,000 tonnes by 2030 — a tenfold increase. This would transform manganese from a steel industry commodity into a critical battery mineral, with corresponding implications for supply chains, pricing, and geopolitics.

Global Supply and African Production

Global manganese production is approximately 20 million tonnes per year, with South Africa (approximately 37% of global production), Gabon, Australia, China, and Brazil as major producers. Africa dominates global manganese production, with South Africa and Gabon alone accounting for nearly half of world output.

Zambia has manganese deposits in the Northwestern Province and other areas, though production to date has been limited. The DRC has known manganese occurrences that remain largely unexplored. As battery demand creates new premium markets for high-purity manganese, previously uneconomic African deposits could become viable — particularly if corridor logistics reduce transport costs to export ports.

Processing Gap

Like most critical minerals, manganese processing is dominated by China. China produces over 90% of high-purity manganese sulphate used in battery cathodes, despite mining only about 7% of global manganese ore. This processing concentration creates the familiar strategic vulnerability: abundant African ore, Chinese processing dominance, Western end-market dependence.

Battery-grade manganese processing requires upgrading manganese ore to high-purity manganese sulphate (HPMSM) through chemical processes that are technically demanding and environmentally challenging. Establishing non-Chinese HPMSM production is a priority for Western supply chain strategies. The corridor's value-addition narrative — processing minerals in Africa rather than exporting raw ore — applies to manganese as strongly as to copper or cobalt.

Manganese and Steel Production

Manganese's primary application — steel production — consumes approximately 90% of global manganese output. Every tonne of steel requires 6-9 kilograms of manganese as a deoxidiser and alloying element. This makes manganese demand directly correlated with global steel production, which totals approximately 1.9 billion tonnes per year. China alone consumes approximately 60% of global manganese for its dominant steel industry.

For the corridor, manganese's steel connection creates a secondary demand driver alongside the battery chemistry story. Infrastructure construction across Africa — including corridor development itself — requires steel, which requires manganese. As Africa industrialises and urbanises, domestic steel demand will grow, potentially creating regional markets for manganese production that currently doesn't exist at scale.

Manganese Environmental Profile

Manganese mining presents specific environmental and health challenges. Manganese dust exposure causes manganism — a neurodegenerative condition with symptoms resembling Parkinson's disease — in mining and processing workers. Effective dust control, worker health monitoring, and protective equipment are essential but often inadequate in artisanal and small-scale operations.

Water contamination from manganese mining can affect downstream communities, with elevated manganese levels in drinking water linked to neurological effects, particularly in children. Environmental management of manganese operations requires the same independent monitoring and community protection frameworks that our watchdog programme provides for other corridor mining activities.

Our ESG Intelligence platform includes manganese-specific environmental indicators as the mineral becomes more strategically important for battery applications. The transition from steel additive to battery material will bring new scrutiny to manganese mining practices — scrutiny that our monitoring infrastructure is designed to facilitate.

Manganese Supply Chain Diversification

South Africa's dominance of manganese mining (37% of global production) and China's dominance of manganese processing create a supply chain that, while less concentrated than cobalt or rare earths, still presents diversification challenges. Logistics disruptions in South Africa — port congestion, rail failures, industrial action at Transnet — have periodically disrupted global manganese supply and spiked prices.

New manganese supply sources in the corridor region would contribute to supply chain diversification while capturing a commodity whose strategic importance is growing with battery demand. Exploration-stage manganese projects in Zambia and the DRC could benefit from the corridor's logistics infrastructure, which reduces the transport cost threshold for mine viability.

The corridor's potential role in manganese is thus prospective rather than current. No large-scale manganese mining currently operates along the corridor route. But as battery demand transforms manganese economics and logistics infrastructure improves access to deposit areas, manganese could join the corridor's commodity portfolio. Our database tracks manganese exploration activity and deposit potential across corridor countries to monitor this emerging opportunity.

Manganese Strategic Stockpiling

Several countries maintain strategic manganese stockpiles as part of critical mineral security programmes. The US National Defense Stockpile includes manganese as a strategic material. China maintains significant manganese reserves. The recognition of manganese as a strategic commodity reflects its essential role in steel production — without manganese, modern steelmaking is impossible — and the growing battery applications that elevate its importance to the energy transition.

Strategic stockpiling creates additional demand and provides a price floor during market downturns. For potential manganese producers in the corridor region, strategic stockpile purchasing programmes offer a guaranteed market with government-backed demand. The US and EU critical mineral strategies both include provisions for stockpile acquisition of strategic materials, creating potential offtake agreements for new African manganese sources.

The corridor's value proposition for manganese thus spans three demand pillars: traditional steel production providing base-load demand, battery chemistry evolution providing growth demand, and strategic stockpiling providing security demand. Each pillar provides independent support for manganese investment in the corridor region, reducing the commodity price risk that characterises single-application minerals.

Related Pages

Key companies: Gecamines

Related minerals: Iron Ore (steel connection) · Lithium (battery connection)

Countries: DR Congo · Zambia · Angola