Ramaco’s $8 Billion Brook Valuation Rests on Carbo-Chlorination Scale-Up

Ramaco Resources has put numbers around its Brook Mine critical-minerals ambitions, and the numbers are large enough to sharpen rather than settle the investment case.

A new conceptual study by Hatch estimates roughly $3.2 billion of construction capital plus about $800 million of contingency for the Wyoming project. Ramaco says its own financial model, using Hatch’s capital and operating inputs, points to an $8 billion net present value and average annual adjusted EBITDA of $1.3 billion. Initial production is now modeled for 2031.

Those figures make Brook one of the more ambitious attempts to turn an unconventional U.S. coal-hosted resource into a domestic source of rare earths and semiconductor-linked critical minerals. They also expose the central risk: the project economics are being built around a processing route that has not yet been demonstrated at commercial scale on Brook feed.

Hatch’s July assessment replaced the hydrometallurgical route used in an earlier Fluor concept with a carbo-chlorination flowsheet. The proposed circuit combines pyrometallurgical and hydrometallurgical steps to recover products including gallium metal, germanium dioxide, scandium oxide and mixed rare-earth carbonate. The design calls for roasted feed and coke to enter fluidized-bed carbo-chlorination reactors operating at about 1,050°C, followed by chloride recovery, leaching and downstream purification.

That route is technically interesting because Brook is not a conventional bastnaesite or monazite deposit where the investment question begins with concentrate grade and established cracking chemistry. Ramaco is trying to extract value from mineralized coal and associated carbonaceous material while producing a broader basket of critical minerals. Management says roughly three-quarters of anticipated Brook revenue would come from commodities whose main demand driver is the semiconductor industry.

That shifts the project’s economic centre of gravity away from a simple rare-earth price thesis. Gallium and germanium matter because supply is highly concentrated. U.S. Geological Survey data show China accounted for about 98% of global primary gallium production and roughly 77% of refined germanium production in 2023. That concentration has become more strategically important as China has tightened export controls on several critical minerals.

But the same breadth that makes Brook strategically attractive also makes the flowsheet difficult. Hatch describes the current work as an initial assessment with an AACE Class 5 cost estimate. The report says limited test work was available for several unit operations and that some reaction extents were based on literature, client data or assumptions. Equipment for the new flowsheet, including the carbo-chlorination units, will require further testing and definition before commercial operability can be established.

That caveat is material. Ramaco’s Q2 release says the pilot-plant building in Wyoming should be structurally complete in the fall, with equipment fabrication beginning in Canada and full-scale pilot operations now expected in 2027. The company also expects an interim economics update by year-end 2026 and a preliminary feasibility study in 2027.

In other words, the sequence of de-risking events is still ahead: bench and pilot metallurgical work, recovery validation, reagent and power optimization, residue handling, equipment scale-up, a higher-confidence capital estimate, product qualification, binding offtake and project finance.

Power intensity deserves particular attention. Hatch says electricity represents 97% of modeled energy cost, with the air-separation plant alone requiring an estimated 11.7 MW. Chlorine management is another key variable. Ramaco is studying whether waste PVC could supply chlorine and whether electronic waste could be blended into the feed to increase gallium and germanium production. Those may improve economics, but they add additional integration and operating complexity to a project that is already process-heavy.

The financing challenge is equally visible. A roughly $4 billion build including contingency is far beyond what Ramaco’s metallurgical-coal business could fund casually from operating cash flow. The company ended Q2 with $400.1 million of liquidity and reported a $15.4 million quarterly net loss. Management says it is in advanced discussions around offtake and non-dilutive public and private financing, but no binding project-finance package has been announced.

Brook does have strategic support that most early-stage projects lack. The U.S. Department of Energy and National Energy Technology Laboratory have worked with Ramaco and Weir International on technology for identifying unconventional critical-mineral resources. Ramaco also has a non-binding memorandum of understanding with REalloys under which mixed rare-earth carbonate could be separated into individual oxides at the Saskatchewan Research Council facility, while Brook scandium oxide could move into alloy production in Ohio.

The next question is therefore not whether Brook can generate an eye-catching NPV in a conceptual model. It is whether Ramaco can convert a novel, high-temperature multi-product flowsheet into repeatable recoveries and a financeable Class 3 or better engineering package without losing the margin implied by the current assumptions.

If the 2027 pilot proves the chemistry and the next engineering pass reduces capital intensity, Brook could become an unusually broad U.S. source of gallium, germanium, scandium and rare-earth products. If recoveries, chlorine consumption, equipment scale-up or power requirements disappoint, the $8 billion NPV will have been an early scoping signal rather than a bankable valuation.