zinc

As demand for the metals and minerals underpinning the green energy transition continues to surge, the pressure is on for miners to find, explore and develop scores of critical minerals.  Thankfully, the materials science revolution continues to bear fruit, allowing resource companies to employ cutting-edge technology in the quest to meet ever-increasing demand for electric vehicles, batteries, renewables and electrification infrastructure.

Startups and joint ventures are stepping up to the plate, harnessing machine learning, cutting-edge chemistry, and breakthrough processes provided courtesy of the materials science revolution.

A case in point, as per a recent Wall Street Journal story: Startup Urbix, an Arizona-based graphite producer leveraging machine learning to discern how to create “uniform graphite anodes fit for use in EV batteries from a range of natural and synthetic forms of graphite.” The company says that its machine learning technique drastically reduces waste — whereas traditional methods result in a roughly 30 to 35 percent yield, Urbix’s technique allows for 80% of raw material inputs to end up in the final product.

Meanwhile, Locus Fermentation Solutions, an Ohio-based chemical business, has begun using bio-surfactants, chemicals from microbes capable of breaking a material’s surface tension, to increase the yield in the copper production process. According to the company, bio surfactants can be utilized for either of the main copper processing techniques and can increase copper yields by 7%, while at the same time saving energy as less rock needs to be crushed.

Mine tailings can also be fertile grounds for resource harvesting.  Massachusetts-based startup Phoenix Tailings currently specializes on finding mine sites free from radioactive materials such as thorium and uranium and recovering REEs from these sites. The company says that at its pilot facility in upstart New York, where it processes the tailings, zero waste is produced as leftovers from the process are recycled.

Other companies, and even governments are also looking to “turn the same stone twice.”

As ARPN previously outlined, in Australia, New Century Resources currently owns and runs the largest tailings retreatment operation at its zinc tailings operation in Queensland.

In the rare earths realm, Reuters lists six major projects outside of China aimed at extracting the critical minerals from waste or byproducts, including Iluka Resources Ltd’s and VHM Ltd’s operations in Australia, Rainbow Rare Earths Ltd’s endeavor in northeast South Africa, Swedish state-owned LKAB’s plans to extract REEs from two existing mines, and two U.S. operations, one of them being the above-referenced Phoenix Tailings, and the other being U.S. Energy Fuels.  U.S. Energy Fuels originally focused on uranium production, started acquiring monazite, a byproduct of mineral sands, to extract REEs with plans to open its own separation plant by 2024.

Beyond the rare earths, global miner Rio Tinto began producing tellurium at its Kennecott copper operation in Utah, where roughly 20 tons of the material are generated from by-product streams generated during the copper refining process. As America’s oldest copper mine, now in its 117th year of operations, there’s no telling how many critical minerals may reside in Kennecott’s historic waste piles.

In addition to recovering tellurium from Kennecott, after commencing production of battery-grade lithium from waste rock at a lithium demonstration site at its Boron mine site in California in 2021, Rio Tinto last fall began partnering with CR Minerals Co. LLC in an effort to extract a material called pozzolans from the facility’s tailings, which can be substituted for or combined with cement to decarbonization construction materials. In Canada, the miner is producing scandium from titanium waste, becoming the first North American producer of scandium in the process.

Meanwhile, as Australia’s Financial Post reported earlier this summer, the Australian government has launched the “Atlas of Australian Mine Waste,”  a mapping project of sites containing mine waste with reprocessing potential.

Acknowledging the potential held by mine waste and tailings, the U.S. Geological Survey (USGS) earlier this spring solicited proposals for FY2023 grants to collect data on mine waste, using funds from Bipartisan Infrastructure Act in the context of the Earth Mapping Resources Initiative (Earth MRI).

At a time when geopolitical tensions are rising along side ever-increasing pressures to accelerate the shift towards renewable energy, the materials science revolution — thankfully — continues to unlock new technologies and techniques allowing for the safe and commercially viable recovery of critical minerals from a variety of previously largely untapped sources, including mine tailings.  It’s ARPN’s view that stakeholders should embrace and further these developments in the context of a comprehensive all-of-the-above approach to bolster critical mineral supply chains.

Recent media coverage might have you believe critical mineral policy only revolves around the “battery criticals”lithium, graphite, nickel, cobalt and manganese, and maybe the frequently referenced, though still somewhat obscure rare earths.  However, as followers of ARPN well know, this is far from the truth.

The New South Wales Department of Planning and environment has taken a closer look at solar panels, which, just like EV batteries, are at the core of the green energy transition, and outlines the top four metals and minerals that make solar panels work: 

Copper — a mainstay metal with perhaps unrivaled versatility, lending itself to a wide range of traditional and new applications,  and yields access to other critical minerals as a “gateway metal,” an indispensable component for advanced energy technology, ranging from EVs and wind turbines to the electric grid and solar panels.

For some of our most recent coverage of Copper, click here.

Silicon — the most abundant compound in the Earth’s crust, silicon takes the form of ordinary sand, quartz, rock crystal, amethyst, agate, flint, jasper, and opal. To produce pure silicon, the compound is hearted with carbon at extra high temperatures.  The material is used extensively in electronics because of its semiconducting properties. It is used in the manufacture of next-gen 5-nanometer (5nm) semiconductor chips, and is a key component of solar panels and photovoltaic cells.

For ARPN’s recent coverage of Silicon, click here.

Silver — By definition a “precious” metal like gold, it may come as a surprise to those who see silver primarily as shiny adornment or a means to store value that the biggest end users of silver may actually be specialized industries. More recently, the metal has evolved from “money metal to techno metal,” as North of 60 Mining News’s Shane Lasley termed it, with its true value lying in “more industrious properties that make it invaluable to high-tech applications such as solar panels, electric vehicles, and 5G networks.”

For Shane Lasley’s Treatment of Silver in the 2021 issue of “Critical Mineral Alliances” click here.

Zinc — primarily used in metallurgical applications, zinc is also a Gateway metal, yielding access to “criticals” Indium and Germanium. Today, zinc is also seeing greater application in green energy technology.

For examples of ARPN coverage of Zinc, click here and here.

These four may not make the top of the hour news at the moment, but silicon, for example, appears on the Australian and European Union’s critical minerals lists, while zinc, previously not on the U.S. Critical Minerals List, was afforded critical mineral status by the U.S. Government earlier this year, and is also deemed critical by the Canadian government.

As for copper – which Canada considers a critical mineral – followers of ARPN well know that there are good reasons to include Copper into the U.S. Government’s Critical Minerals List, and ARPN’s Daniel McGroarty has consistently argued in favor of doing so via public comments during the draft process of both the initial 2018List and its 2022 iteration.

See McGroarty’s public comments on the U.S. Critical Minerals Lists here and here.

The bottom line is, while people appear to be laser focused on achieving the green energy transition via securing supply chains for the battery criticals and rare earths, the issue is bigger than this limited group of metals and minerals.  With the materials science revolution continuing to yield research breakthroughs at neck-breaking speeds, demand scenarios for metals and minerals will be subject to change.

It is clear that in the words of Forbes contributor Wal van Lierop, “[w]ithout massive investments in base metals and key minerals, Europe and North America will fail to meet their carbon emission targets and face a new form of energy insecurity,” — but these investments have to be made in the context of a broad-based “all of the above” strategy.  

This week we continue our coverage of the just-released draft revised Critical Minerals List, for which the US Geological Survey (USGS) began soliciting public comment last week — this time via Andy Home’s latest.  In a new column for Reuters, Home zeroes in on the “only two new additions” to the draft list. (As ARPN outlined [...]

With the addition of 15 metals and minerals bringing the total number up to 50, this year’s draft updated Critical Minerals List, for which USGS just solicited public comment, is significantly longer than its predecessor. This, as USGS notes, is largely the result of “splitting the rare earth elements and platinum group elements into individual entries [...]

On November 9, 2021, the U.S. Geological Survey announced it is seeking public comment, on a draft revised list of critical minerals.  The revised list is the latest development in a broader move towards a more comprehensive mineral resource policy on the part of the U.S. Government — a long-overdue shift that began to gain steam in [...]

As demand for critical minerals is increasing in the context of the global shift towards a green energy future, Canada’s Minister of Resources Seamus O’Regan Jr. earlier this week announced the release of a Canadian list of 31 metals and minerals deemed critical “for the sustainable economic success of Canada and our allies—minerals that can [...]

Earlier this month, members of the Congressional Western Caucus sent a letter to Secretary of the Interior Ryan Zinke, Secretary of Commerce Wilbur Ross, and Acting Chair of the Council on Environmental Quality (CEQ) Mary Neumayr calling for the inclusion of additional metals and minerals into the draft critical minerals list released by Secretary Zinke [...]

It’s that time of the year again.  And as people are gearing up for the New Year, we are taking the opportunity to take stock of the last twelve months, and want to highlight a few select notable developments of relevance to ARPN followers. From a mineral resource policy perspective, we saw some positive developments [...]

Over the course of the past few months, we have featured two classes of metals and minerals, which we believe deserve more attention than they are currently being awarded.  Expanding on the findings of our 2012 “Gateway Metals and the Foundations of American Technology” report, in which we focused on a group of five “Gateway” metals which [...]

The following is an overview of our “Through the Gateway” informational campaign, in which we outline the importance of Gateway Metals and their Co-Products. Here, we expand on the findings of our “Gateway Metals and the Foundations of American Technology” report, in which we focused on a group of five “Gateway Metals,” which are not only critical to manufacturing and [...]