Korea Zinc, the world's largest metal refiner, is attracting renewed attention from Washington as the United States moves to secure critical mineral supply chains free from Chinese dependency — spanning mining, processing, refining, and manufacturing on American soil.

On Friday, U.S. President Donald Trump unveiled a $3 billion critical minerals investment package during a roundtable on the American mining industry held at the U.S. Department of State in Washington.

The initiative reflects accelerating U.S. efforts to strengthen competitiveness across advanced industries — including defense, semiconductors, artificial intelligence, and batteries — by expanding domestic processing and refining capacity while securing local raw material sources.

Against this policy backdrop, Korea Zinc continues to expand its presence in the U.S. critical minerals sector. During the same event, U.S. Commerce Secretary Howard Lutnick highlighted the company's $7.4 billion Tennessee smelter project, known as "Project Crucible," as a prime example of how tariffs and federal policy can attract world-class industrial firms to build essential infrastructure in the United States.

Lutnick emphasized that critical minerals represent not only an economic issue but a national security imperative. He stated that if the U.S. intends to lead in advanced manufacturing, AI, semiconductors, energy, and defense, it cannot remain dependent on foreign adversaries.

"Our objective is very simple. We're going to mine here. We're going to process here. We're going to refine here. We're going to manufacture here," Lutnick said.

According to Korea Zinc, one of the planned Tennessee smelter's most significant advantages is its capacity to produce 12 nonferrous metals along with semiconductor-grade sulfuric acid through a single integrated processing system.

Eleven of those metals appear on the U.S. government's list of 60 designated critical minerals. They include zinc, lead, copper, and silver, as well as antimony, indium, bismuth, tellurium, palladium, gallium, and germanium. Gallium, germanium, indium, and antimony carry particular strategic weight due to their applications in semiconductors, defense, telecommunications, and energy technologies. China is the dominant global producer of gallium and germanium and imposed export controls on both metals in 2023, moves that underscored the vulnerability of U.S. supply chains and intensified Washington's push to secure allied processing capacity.

For the United States, the ability to recover multiple critical minerals from one integrated facility could significantly enhance supply chain development efficiency. For South Korea, the project offers an opportunity to broaden bilateral cooperation beyond semiconductors, batteries, and automobiles into the critical minerals sector, encompassing the processing and refining stages of the supply chain.

Korea Zinc has operated its Onsan smelter in Ulsan for decades, producing zinc, lead, and copper while developing proprietary technologies to process complex, low-grade feedstocks and recover rare, valuable metals from smelting byproducts. This accumulated expertise positions the company to contribute meaningfully to Washington's push for a more integrated, China-free critical minerals supply chain.

The company plans to accelerate Project Crucible through Crucible Zinc, its U.S. joint venture supported by major equity investments from the U.S. Departments of Defense and Commerce. By leveraging existing infrastructure, a local workforce, and established feedstock networks, Korea Zinc aims to reduce the time and risk typically associated with building a greenfield facility.

Korea Zinc also intends to process approximately 620,000 tons of smelting byproducts accumulated across five pond sites at the Tennessee location. Industry observers note that combining these existing assets with Korea Zinc's refining expertise could help accelerate the path to commercial production.

Washington's financial commitment underscores Project Crucible's national security significance. In a demonstration of this strategic alignment, the facility became the first South Korean-led initiative designated under FAST-41 — a federal framework designed to streamline environmental and administrative permitting for key infrastructure projects.

That designation highlights Korea Zinc's refining capabilities as an essential component of U.S. economic security, creating a hybrid model that merges American resources, infrastructure, and policy support with Korean technology and operational know-how. As Washington continues to court allied partners for critical mineral processing capacity, Project Crucible is likely to serve as a reference case for future joint ventures seeking to combine foreign refining expertise with U.S. capital, permitting support, and industrial sites.