Two firms, Singapore-based Trafigura and Canada's Ivanhoe Mines, signed a major deal on Wednesday to export copper along a US-backed rail route from the Democratic Republic of Congo.
The corridor to the Angolan port of Lobito has been part-funded by Washington as part of its efforts to help Western companies compete with China for access to African minerals.
Trafigura announced that Ivanhoe's Kamoa-Kakula mine in the DRC would be assigned capacity on the route at the Mining Indaba, an annual industry summit in Cape Town, South Africa.
After an initial 10,000 tonnes of copper products in 2024, as the line comes into service, the mine would be able to ship between 120,000 and 240,000 tonnes per year to the Atlantic port.
Trafigura's chairman and CEO Jeremy Weir said the industry hopes "to grow the volumes on the corridor so that it becomes the leading rail transport link in sub-Saharan Africa."
Ivanhoe Mines' founder and co-chair Robert Friedland thanked the Trafigura-led Lobito Corridor consortium and the governments of Angola and the DRC.
Lobito, he said, is "fast becoming one of the most important trade routes for vital copper metal in the world" and would unlock access to minerals in other parts of central southern Africa.
The Lobito Corridor is not just an economic opportunity for poor land-locked African countries like the DRC and Zambia attempting to get their minerals to oil-rich Angola's ports.
It is also a playing piece in the geopolitical battle between the United States and its allies and China, which is securing access to African mines with promises of infrastructure investments.
Last month Washington's top diplomat, Secretary of State Antony Blinken, visited Angola to tout the US counteroffer, including its massive investment in the Lobito Corridor.
"This project has genuinely transformative potential for this nation, for this region and, I would argue, for the world," Blinken said.
Washington has vowed to fund 1,300 kilometres (800 miles) of rail and to work with multinational lenders to expand the project to Tanzania, connecting the Atlantic and Indian Oceans.
The route will transport resources critical to the global economy, including copper and cobalt, both vital in the production of solar panels and electronics like smartphones.