

(Posted on 11/03/21)
Rio Tinto will begin construction on a new plant that will recover tellurium, a critical mineral used in solar panels, from copper refining at its Kennecott mine near Salt Lake City, Utah. The company is investing $2.9 million to set up the plant, which will recover tellurium as a byproduct of copper smelting, extracting a valuable mineral from waste streams. The plant will have a capacity to produce approximately 20 tonnes of tellurium per year. Rio Tinto expects to begin production of tellurium in the fourth quarter of 2021, creating a new North American supply chain for this critical mineral.
Tellurium is an essential component of cadmium telluride, a semiconductor used to manufacture thin film photovoltaic (PV) solar panels. Thin films made of this compound can efficiently convert sunlight into electricity. Tellurium can also be used as an additive to steel and copper to improve machinability, making these metals easier to cut. It can also be added to lead to increase resistance to sulfuric acid, vibration and fatigue.
Rio Tinto Kennecott managing director Gaby Poirier said “The minerals and metals we produce are essential to accelerate the transition to renewable energy. Adding tellurium to our product portfolio provides customers in North America with a secure and reliable source of tellurium produced at the highest environmental and labour standards with renewable energy. Rio Tinto is committed to using innovation to reduce waste in our production process and extract as much value as possible from the material that we mine and process.”
Utah Governor Spencer Cox said “With abundant natural resources, Utah is ideally positioned to help supply the critical minerals essential to maintain American manufacturing competitiveness. Rio Tinto’s smelter at Kennecott is one of only two that is capable of producing copper and other critical minerals. The new tellurium plant is another valuable contribution to critical mineral independence and energy security in the U.S.”
Along with producing almost 20 per cent of U.S. copper, Kennecott’s smelting process also recovers gold, silver, lead carbonate, platinum, palladium and selenium, while molybdenum is recovered from the Copperton concentrator. In total, nine products are currently recovered from the ore extracted at Kennecott.
The National Grain and Feed Association (NGFA) in the USA has applauded Congress for including a slate... Read more
Fertilizers Europe’s have released their reaction to the European Commission announcement on the... Read more
Bunge Global SA has confirmed that it has completed the previously announced sale of its North America... Read more
Following the successful debt raising at the end of April 2025, SSAB has secured an additional EUR 430... Read more
Despite China’s dominant position in securing commodities across Africa, there are still many... Read more
Rio Tinto and Hancock Prospecting will invest $1.61 billion (Rio Tinto share $0.8 billion) to develop... Read more
SSAB has commenced preparatory work to build a new, state-of-the-art steel mill in Luleå, Sweden... Read more
Anglo American plc has streamlined its executive leadership team to reflect substantial progress with... Read more
NeoSmelt, a consortium of leading resources, energy and manufacturing companies working together on... Read more
Northern Ireland based Telestack have announced that they have been awarded a contract for the supply... Read more