The global copper industry is facing increasing pressure in the smelting segment as processing capacity growth outpaces the availability of copper concentrate, reshaping economics for smelters across major producing regions.
At the center of the challenge are treatment and refining charges (TC/RCs), the fees paid to smelters for converting copper concentrate into refined metal. Market conditions have shifted sharply as new processing capacity, particularly in China, has intensified competition for concentrate supplies. According to Reuters, benchmark TC/RCs fell below zero in December 2024 and reached a record low of minus US$49 per tonne in January 2026, reflecting tightening concentrate availability and growing competition among smelters.
Chinese Smelters Face Tight Concentrate Markets
Chinese operators have been among the most exposed to the deteriorating processing environment. Jiangxi Copper played a central role in annual benchmark negotiations with Chilean producer Antofagasta. Reuters reported that the two companies agreed to substantially lower copper concentrate processing fees for 2025 as concentrate availability tightened.
Market conditions continued to weaken thereafter. Reuters later reported that Chinese smelters secured a processing-fee agreement with Antofagasta at US$0 per tonne and 0 cents per pound, highlighting the extent of pressure on smelting margins.
Tongling Nonferrous Metals Group was among the companies affected by the downturn. Reuters reported that Chinese smelters, including Tongling, accelerated maintenance schedules as concentrate shortages and negative processing fees eroded profitability.
By-Products Support Smelter Revenues
Despite weak copper-processing economics, revenue from by-products has provided an important source of support for some operators. Sulphuric acid, gold and silver credits have helped offset declining TC/RC income. Reuters reported that sulphuric acid became a significant contributor to profitability for Chinese smelters during a period when copper-processing fees remained deeply negative.
The growing reliance on by-product revenue underscores the changing economics of copper smelting, where profitability is increasingly influenced by secondary product markets in addition to copper output.
Japanese Producers Restructure Smelting Operations
The challenging market environment is also driving restructuring efforts outside China. Mitsubishi Materials announced plans to cease copper concentrate processing and close related smelting operations at its Onahama plant by the end of March 2027. Reuters reported that the company cited intensifying competition from overseas smelters and a sharp deterioration in TC/RCs.
The company expects to record an impairment loss of approximately 21 billion yen (US$132 million) associated with the closure.
In response to changing market conditions, JX Advanced Metals, Mitsui Kinzoku, Marubeni, and Mitsubishi Materials signed a final agreement to integrate Mitsubishi Materials’ copper concentrate procurement and copper-product sales functions into Pan Pacific Copper structures. The integration is intended to strengthen raw-material procurement capabilities and improve profitability within a more competitive processing market.
Recycling Gains Importance in Smelting Strategy
Japanese producers are also increasing exposure to recycled feedstocks. Reuters reported that JX Advanced Metals plans to invest 7 billion yen (approximately US$47 million) to expand recycled-material pre-treatment capacity by 50% by fiscal 2027.
The company is advancing a “green hybrid smelting” strategy designed to reduce dependence on traditional concentrate markets and diversify feedstock sources. The shift reflects broader industry efforts to supplement mined concentrate with recycled materials as smelters seek greater supply flexibility.
Chile Project Anchored by Long-Term Concentrate Supply
While some operators are reducing exposure to concentrate processing, new smelting capacity continues to be developed where feedstock security can be established. Codelco and Glencore signed a preliminary agreement to collaborate on a new copper smelter project in Antofagasta, northern Chile.
Under the proposal, Codelco would provide up to 800,000 tonnes per year of copper concentrate for a minimum of 10 years, while Glencore would develop a smelter with projected processing capacity of 1.5 million tonnes per year.
The project links new processing infrastructure directly to long-term concentrate supply, providing a foundation for operations in a market characterized by tightening feedstock availability.
Processing Capacity Becomes a Critical Industry Variable
Developments involving Jiangxi Copper, Tongling Nonferrous, Antofagasta, Mitsubishi Materials, JX Advanced Metals, Pan Pacific Copper, Codelco, and Glencore illustrate the evolving dynamics of the global copper-processing sector.
The market is increasingly shaped by the balance between concentrate supply and smelting capacity, while environmental permitting, by-product markets, recycling capabilities and long-term feedstock agreements play a growing role in determining project viability. As governments seek greater domestic processing capacity and miners pursue secure outlets for concentrate production, the economics of copper smelting continue to depend on access to feedstock, operating costs and the ability to sustain profitability across commodity cycles.
