Critical Mineral Supply Chain Diversification — De-Risking from China, Alternative Processing, and Western Refinery Investments

The Imperative of Diversification

The diversification of critical mineral supply chains away from Chinese dominance has become the most urgent industrial policy challenge facing the United States, the European Union, and their allies. The concentration risk is stark: China processes approximately 70% of the world's cobalt, 65% of its lithium, nearly 90% of its rare earth elements, over 90% of its manganese for batteries, and dominant shares of graphite and other minerals essential to the energy transition. This processing dominance means that even minerals mined in Western-allied countries, or by Western companies in Africa, are typically shipped to Chinese refineries before they can be manufactured into batteries, magnets, semiconductors, and other advanced products.

The strategic vulnerability created by this concentration has been demonstrated in practice. China's imposition of export controls on gallium, germanium, and graphite between 2023 and 2024, announced in response to US semiconductor export restrictions, showed that Beijing is willing to weaponise mineral supply. For Western policymakers, these restrictions transformed an abstract risk assessment into a concrete demonstration of dependency. The lesson was unambiguous: any country that depends on China for mineral processing is subject to Chinese leverage in geopolitical disputes unrelated to minerals.

Diversification, however, is not merely a matter of political will. It requires building physical infrastructure, developing technological capabilities, training workforces, securing enormous capital investments, and doing so on timelines compressed by the accelerating pace of the energy transition. The challenge is compounded by the fact that Chinese processing dominance was built over two decades of sustained investment, policy support, and tolerance for the environmental costs that early-stage mineral refining entails. Replicating this industrial base outside China will take years even under the most optimistic scenarios.

The Chinese Processing Chokepoint

Understanding the diversification challenge requires understanding how China built its processing dominance and why that dominance is so difficult to replicate.

China's mineral processing industry developed through a combination of deliberate industrial policy, massive capital investment, relaxed environmental regulation, and integration with domestic manufacturing demand. Beginning in the 1990s, Chinese state policy identified mineral processing as a strategic industry and directed state banks to finance processing facility construction. Environmental standards for refining operations were set lower than in Western countries, reducing compliance costs and enabling faster facility construction. The growth of Chinese manufacturing, particularly in electronics, automotive, and clean energy sectors, created domestic demand for refined mineral products that provided a guaranteed market for processing facilities.

The chokepoint's power derives from scale economics and technological expertise. Chinese refineries operate at scales that drive down per-unit costs, making it difficult for smaller facilities elsewhere to compete on price. Chinese companies have developed proprietary processing technologies, particularly for rare earths and battery-grade lithium, that represent genuine technological advantages. The workforce of trained metallurgists, chemical engineers, and process technicians required to operate complex refining facilities exists at scale in China but is scarce elsewhere. Replicating not just the facilities but the human capital and operational expertise is a generational challenge.

Building Alternative Processing Capacity

The construction of non-Chinese mineral processing capacity is proceeding on multiple fronts, driven by a combination of government policy, private investment, and strategic necessity. The investment pipeline is significant, but the gap between announced projects and operational facilities remains wide.

In North America, several processing facilities are under development or in planning stages. Lithium Americas is developing the Thacker Pass lithium mine and processing facility in Nevada, which would be one of the largest lithium sources in the Western Hemisphere. Piedmont Lithium is building a lithium hydroxide plant in Tennessee. Electra Battery Materials is constructing a cobalt refinery in Ontario, Canada. The US Department of Energy has committed billions in grants and loans to support domestic mineral processing through the Bipartisan Infrastructure Law and IRA funding mechanisms.

In Europe, the CRMA's processing targets are driving investment. Finnish company Terrafame produces nickel sulphate for batteries at its Sotkamo facility. Belgium's Umicore operates one of the world's largest cobalt and nickel refineries outside China at its Olen facility, producing battery-grade cathode precursor materials. Norway's Hydro is expanding aluminium processing with an emphasis on recycled content. Multiple lithium conversion facilities are planned across Portugal, Germany, and France, leveraging European lithium deposits and imported concentrates.

In Australia, the government's Critical Minerals Strategy has supported the development of processing facilities that complement the country's substantial mining industry. Lynas Rare Earths operates the only significant non-Chinese rare earth processing facility at its Kalgoorlie plant, with an additional facility under construction in Texas under a US Department of Defense contract. BHP's Nickel West operations in Western Australia include integrated nickel sulphate production for the battery market.

Each of these initiatives faces challenges. Construction costs for processing facilities in Western countries are significantly higher than in China, due to labour costs, environmental compliance requirements, and permitting timelines. The environmental and community opposition that mineral refining attracts in Western countries, the "not in my backyard" dynamic, creates political obstacles that Chinese facilities operating under more permissive regulatory regimes do not face. And the timeline from project announcement to commercial production typically spans five to ten years, meaning that facilities announced today will not contribute to supply chain diversification until the late 2020s or early 2030s.

Western Refinery Investment Map

The following represents the principal non-Chinese mineral processing investments that are either operational, under construction, or in advanced development as of mid-2025. This is not exhaustive but captures the most strategically significant projects.

The aggregate capacity of these projects, while growing, remains a fraction of Chinese processing output. Achieving meaningful diversification requires not isolated facility construction but the development of entire processing ecosystems, including feedstock supply agreements, skilled workforces, waste management systems, and downstream customer relationships. China's processing dominance was built on ecosystem development over decades. The West is attempting to replicate this in years.

Policy Tools Driving Diversification

Governments have deployed an array of policy tools to accelerate supply chain diversification, ranging from financial incentives to regulatory mandates to diplomatic agreements.

Financial incentives are the most direct tool. The US Inflation Reduction Act's clean vehicle tax credits, conditioned on mineral sourcing from allied nations and excluding Chinese-processed minerals, create a price signal worth billions of dollars annually that redirects investment toward non-Chinese supply chains. The EU's CRMA creates regulatory requirements that drive investment in European processing. Government grants, concessional loans, and loan guarantees from the US Department of Energy, European DFIs, and allied institutions reduce the capital cost of new processing facilities.

Regulatory mandates create compliance requirements that force supply chain restructuring. FEOC restrictions under the IRA effectively mandate Chinese-free supply chains for vehicles seeking tax credits. The CRMA's single-source dependency limits require European manufacturers to diversify mineral procurement. Due diligence regulations, including the EU's Battery Regulation and conflict mineral regulations, create additional compliance incentives to use transparent, traceable supply chains that are more easily established outside Chinese-controlled channels.

Trade policy instruments include tariffs on Chinese mineral products, trade agreements that facilitate mineral trade with allied nations, and export control frameworks that restrict technology transfer to Chinese competitors. The US has imposed tariffs on Chinese-processed minerals and is negotiating critical mineral agreements with allies. The EU's Carbon Border Adjustment Mechanism (CBAM), while primarily designed to address carbon leakage, creates additional cost pressures on Chinese mineral processing, which relies heavily on coal-fired energy.

Diplomatic tools include the Mineral Security Partnership, bilateral mineral agreements, and development finance investments that create supply relationships with mineral-producing nations. The DFC's investments along the Lobito Corridor are simultaneously infrastructure finance and supply chain diplomacy, creating physical and institutional connections between African mineral producers and Western markets.

Processing in Africa: The Value Addition Frontier

The diversification of mineral processing away from China has created an unprecedented opportunity for mineral processing investment in Africa. African governments have long demanded that minerals be processed locally rather than exported as raw concentrates, and the convergence of Western supply chain security concerns with African value addition demands creates a powerful alignment of interests.

The logic is compelling. African mineral-producing countries have the feedstock. Western nations have the capital and technology. Both have the motivation: Africa wants industrial development and employment, the West wants non-Chinese processing capacity. The Lobito Corridor provides the transport infrastructure to move processed minerals from African production centres to Atlantic shipping lanes and onward to European and North American markets.

Several processing initiatives in Africa are advancing. In Zambia, the government has made mineral value addition a centrepiece of its development strategy, negotiating with both Chinese and Western investors for processing facility construction. The proposed establishment of battery precursor manufacturing in Zambia's industrial zones would create a direct link between Copperbelt mining and the Western battery supply chain. In the DRC, the national battery precursor strategy envisions converting raw cobalt and copper concentrates into higher-value products before export, capturing a greater share of the mineral value chain within the country.

In Tanzania, Lifezone Metals is developing a hydrometallurgical processing facility for nickel and platinum group metals, using a proprietary technology that reduces the environmental footprint of conventional smelting. The project has attracted DFC financing and represents a model of technology transfer that could be replicated for other minerals and in other African countries.

The challenges to African processing development are significant. Energy costs in many African countries are high and supply is unreliable, creating obstacles for energy-intensive refining operations. Workforce skills for complex metallurgical processes are scarce. Water availability, essential for mineral processing, is constrained in some locations. And the regulatory and institutional environments in countries like the DRC present risks that increase the cost of capital for processing investments. Addressing these constraints requires infrastructure investment that the Lobito Corridor and associated energy projects are designed to provide.

The Economics of Diversification

Supply chain diversification carries real economic costs that governments and industry must acknowledge and manage. Chinese processing dominance was not built by accident. It was built on genuine cost advantages that alternative facilities must overcome.

The primary cost advantage is scale. Chinese cobalt refineries process hundreds of thousands of tonnes annually. A new Western or African facility starting at thousands of tonnes cannot achieve comparable unit costs. Scale advantages are amplified by China's integrated supply chain architecture, where mining, processing, manufacturing, and end-use occur in proximity, reducing logistics costs that dispersed Western supply chains cannot avoid.

Energy costs represent a second advantage. Chinese processing facilities often use cheap coal-fired electricity, while Western alternatives face higher energy costs from renewable or gas-fired generation. The environmental case for diversification, reducing the carbon footprint of mineral processing, comes with a cost premium that consumers and manufacturers must absorb.

Labour costs in China, while rising, remain below Western levels for the skilled technical workforce that mineral processing requires. African processing offers a potential cost advantage in labour, but this is offset by higher training requirements and the need to develop local expertise from a limited base.

The economic case for diversification ultimately rests on risk pricing. The cost of supply chain disruption, whether from Chinese export restrictions, geopolitical conflict, or pandemic-related shutdowns, is difficult to quantify but potentially enormous. The IRA and CRMA effectively internalise this risk by creating regulatory penalties for Chinese-dependent supply chains, making diversification economically rational even where it increases unit processing costs. The question is whether these policy instruments create sufficient incentive to sustain investment through the years of below-commercial returns that new processing facilities will experience as they scale up.

Timeline and Prospects

Meaningful diversification of critical mineral processing will require at least a decade of sustained investment, policy support, and institutional development. The current pipeline of announced projects, if fully realised, would reduce Chinese processing share for most minerals by ten to twenty percentage points by the early 2030s. This represents significant progress but would leave China as the dominant processor for most critical minerals well into the next decade.

The timeline is compressed by the accelerating pace of the energy transition. Global EV sales are growing at 30-40% annually, and renewable energy deployment is accelerating. Demand for processed mineral inputs is growing faster than non-Chinese processing capacity can expand, creating a period of heightened vulnerability during which Western supply chains remain dependent on Chinese processing even as diversification investments mature.

The Lobito Corridor plays a specific role in this timeline. By creating a transport link between the DRC-Zambia Copperbelt and Atlantic markets, the corridor enables mineral flows that bypass Chinese-controlled logistics. By supporting the development of processing capacity in Africa, it creates refining alternatives that complement domestic Western facilities. And by demonstrating that Western-backed infrastructure can deliver at scale, it builds the credibility necessary to sustain the long-term investment commitments that diversification requires.

The outcome of the diversification effort will depend on whether Western governments maintain policy support through economic cycles and political transitions, whether private sector investment materialises at sufficient scale, and whether African host countries provide the enabling environment necessary for processing facility development. The stakes are high: failure to diversify leaves Western economies permanently vulnerable to Chinese supply chain leverage, while success creates a more resilient, multipolar mineral processing landscape that serves the interests of both Western consumers and African producers.