Boston Metal’s Green Steel Breakthrough and Expansion in Brazil
Boston Metal, a Massachusetts-based company pioneering sustainable metals production, has made significant strides in advancing its Molten Oxide Electrolysis (MOE) technology. This innovation, designed to reduce the environmental footprint of metal manufacturing, is now driving the company’s expansion into critical metals production through its Brazilian subsidiary, Boston Metal do Brasil.
Understanding Molten Oxide Electrolysis (MOE)
At the core of Boston Metal’s operations is MOE, a process that uses electricity to separate valuable metals from ore. By heating a molten electrolyte to approximately 1,600 °C (3,000 °F), the technology facilitates chemical reactions that extract metals like niobium, tantalum, and tin from low-grade waste materials. This method not only enhances resource efficiency but also aligns with global demands for sustainable production practices. In early 2025, Boston Metal achieved a milestone by producing about a ton of steel through its largest industrial cell run to date in Woburn, Massachusetts. While steel remains a focus, the company is increasingly targeting high-value critical metals, which are essential for industries ranging from aerospace to renewable energy.
Brazilian Subsidiary Drives Critical Metals Production
Boston Metal do Brasil, established in Coronel Xavier Chaves, Minas Gerais, is central to the company’s strategy. The subsidiary is tasked with recovering critical metals from mining and metallurgical waste, transforming what was once a liability into a valuable resource. CEO Tadeu Carneiro, who has led the company since 2017, emphasized that funding will support the facility’s operations and future efforts to produce metals like vanadium, nickel, and chromium. The Brazil plant, which began construction in 2024, represents a key phase in Boston Metal’s commercialization of MOE. While specific timelines for full-scale production remain undisclosed, the subsidiary’s progress underscores the company’s commitment to scaling its technology.
Funding and Strategic Growth
Boston Metal has secured substantial financial backing to accelerate its mission. In July 2025, the company announced a $51 million convertible note investment, aimed at advancing the second phase of its Brazil plant. This follows an earlier $75 million funding round, which supported the commercial deployment of MOE for critical metals. The funding underscores investor confidence in Boston Metal’s vision to disrupt traditional metals production. By leveraging MOE, the company aims to create a more sustainable supply chain for metals critical to advanced technologies, including AI and clean energy infrastructure.
Leadership and Industry Expertise
Tadeu Carneiro, with nearly 50 years of experience in the metals industry, has been pivotal in Boston Metal’s growth. His previous role as CEO of CBMM, a global leader in niobium production, brought expertise in scaling innovative technologies. Under his leadership, Boston Metal has expanded its operations and strengthened partnerships, including a memorandum of understanding with Outokumpu to optimize metals production. Antonio Cirone, president of Boston Metal do Brasil, oversees the subsidiary’s efforts to commercialize MOE. The team’s focus on recovering metals from waste streams aligns with broader industry trends toward circular economy models.
Future Prospects
As Boston Metal continues to refine its technology, the company’s success could redefine global metals production. By prioritizing sustainability and resource efficiency, it positions itself at the forefront of the green industrial revolution. With ongoing investments and a clear strategic roadmap, Boston Metal’s MOE technology may soon become a cornerstone of the next generation of metal manufacturing.
Learn more about Boston Metal’s latest funding round
Explore Boston Metal do Brasil’s operations
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