Minerals Technologies unveils rare earth and slag tech targets
- Minerals Technologies unveiled new high-purity calcium metal production capabilities
- Initiative targets over $100 million in incremental revenue from rare earth supply chains
- Expanded NewYield technology repurposes steel slag with $250 million US market potential
- Strategic growth engines include automation, PFAS remediation, and sustainable fuel filtration
*this image is generated using AI for illustrative purposes only.
Minerals Technologies Inc. (NYSE: MTX) presented new breakthrough innovations targeting domestic rare earth supply chains and industrial waste repurposing at its 2026 Investor Day. The company reiterated long-term growth targets while highlighting specific opportunities to expand into higher-value markets.
High-purity calcium for rare earths
MTI detailed a new high-value revenue opportunity involving the production of high-purity calcium metal, a critical input for heavy rare earth metallization. The company already produces calcium metal in the United States for high-strength steel applications. This new process supports the development of a domestic rare earth supply chain serving aerospace, defense, transportation, renewable energy, electronics, and medical technology sectors. MTI estimates this initiative will drive over $100 million in incremental revenue over the next several years.
Steel slag repurposing technology
The company revealed an expansion of its proprietary NewYield technology, which uses Crystal Engineering to repurpose pulp waste from paper factories. This capability is now applied to steel slag generated at steel mills. In the United States, three million tons of steel slag are currently landfilled annually. MTI’s solution converts this by-product into commercially valuable mineral products, including critical minerals like magnesium and manganese. These materials support domestic infrastructure development and the production of batteries, electric vehicles, and aerospace technologies.
| Opportunity | Estimated Market/Revenue | Key Application |
|---|---|---|
| High-purity calcium metal | Over $100 million incremental revenue | Heavy rare earth metallization |
| Steel slag repurposing | Greater than $250 million TAM (US) | Critical minerals, batteries, EVs |
Strategic growth engines
Douglas T. Dietrich, Chairman and Chief Executive Officer, emphasized that MTI’s global mineral reserves and core technologies enable the provision of functional components across diverse end markets. The company identified several strategic growth engines:
- Expansion into higher growth markets
- Deepening positions in existing core markets and geographies
- New products and solutions, including automation for steelmaking, PFAS remediation, waste repurposing in paper and packaging, and Sustainable Aviation Fuel filtration
Dietrich stated that innovation remains a core tenet of the long-term growth strategy, allowing the company to apply core technologies in innovative ways to position itself in higher-growth, higher-value markets. The event took place at MTI’s R&D facilities in Bethlehem, Pennsylvania, where executive management and product line leaders reviewed the company’s approach to innovation.
How might recent U.S. legislative incentives for domestic critical mineral production impact the timeline for MTI's high-purity calcium revenue realization?
What specific regulatory hurdles or environmental compliance costs could affect the scalability of MTI's steel slag repurposing technology across different U.S. steel mills?
How does MTI's entry into the heavy rare earth metallization supply chain position it against established competitors like MP Materials or Lynas Rare Earths?
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