Tag Archives: Circored

TNG enlists Metso Outotec’s H2-based Circored process for Mount Peake concentrate plans

TNG Limited, an Australia-based resources company, has awarded Metso Outotec a study looking at reducing Mount Peake Ti-V magnetite concentrate using Circored™ technology, which uses hydrogen as its only reductant source.

As part of the study, Metso Outotec will perform a techno-economic assessment to integrate Circored technology into TNG’s TIVAN® process that provides for the extraction of high-quality products from Ti-V magnetite orebodies.

Metso Outotec has been granted this assignment following positive test work performed for TNG, which confirmed the applicability of hydrogen-based reduction for Mount Peake Ti-V magnetite concentrate.

The test work program, which was a precursor to a more detailed commercial and technical evaluation, was a success, TNG says, delivering the following results:

  • Achieved iron metallisation targets across a range of testwork parameters;
  • Demonstrated the viability of processing Mount Peake titanomagnetite concentrate with Metso Outotec’s Circored technology; and
  • Generated samples for downstream validation testwork.

Now, Metso Outotec will further define the process flowsheet for the Mount Peake project and prepare a preliminary capital cost and operating cost (+/-30%) for a Circored Plant.

The use of hydrogen is a key part of the TNG’s medium-to-longer-term strategy to reduce its net carbon footprint from processing operations at the Mount Peake project.

TNG Managing Director & CEO, Paul Burton, said the Metso Outotec study also complements its existing partnership with SMS group, which TNG has a strategic partnership with, to investigate green hydrogen production at Mount Peake.

Located 235 km north of Alice Springs, in the Northern Territory of Australia, Mount Peake will be a long-life project producing a suite of high-quality, high-purity strategic products for global markets including vanadium pentoxide, titanium dioxide pigment and iron ore fines, accordiing to TNG. The project has received Major Project Status from the Australian Federal Government and the Northern Territory Government.

Circored, part of Metso Outotec’s Planet Positive portfolio, is a process that uses hydrogen as the sole reducing agent in the reduction of fine ores, enabling carbon neutrality for metal processing plants.

Metso Outotec helps steel sector decarbonise with next gen Circored process

Metso Outotec says it is introducing the next generation of its CircoredTM process for the direct reduction of iron ore fines using hydrogen as a reducing agent instead of CO produced from fossil fuels.

This new process will allow the iron and steel industry to efficiently tackle the decarbonisation challenge, according to the company.

The flexible Circored process, part of Metso Outotec’s Planet Positive portfolio, produces highly metalised DRI (direct reduced iron) or HBI (hot briquetted iron) that can directly be used as feed material in electric arc furnaces for carbon-free steelmaking.

Attaul Ahmad, Vice President, Ferrous and Heat Transfer at Metso Outotec, said: “We are very excited about the Circored process. It is an emissions- and cost-efficient alternative to traditional steelmaking routes. This innovative process eliminates the need for costly and energy intensive pelletising, and its functionality and performance have been proven in an industrial-scale demonstration plant.

“Now our team of experts has evolved the process further, and we will present the updated technology at the 2021 Dubai Steel & Raw Materials Hybrid Conference on December 8th. Additionally, during the first (March) quarter of 2022, we will be revealing further ground-breaking additions to Circored capabilities – the key word being low-grade ore – so please stay tuned for these exciting developments.”

The Circored process is based on the fluidised bed knowledge and experience developed and applied by Metso Outotec over decades in hundreds of plants for different applications. The process applies a two-stage reactor configuration with a circulating fluidised bed followed by a bubbling fluidised bed downstream. The typical plant capacity is 1.25 Mt/y per line. Two or more lines can be combined using joint facilities and utility areas. In standalone plants, the produced DRI is briquetted to HBI to enable further handling and safe transport.

If a Circored plant is integrated into an existing steelmaking facility, energy efficiency can be further increased by direct hot feeding of the DRI to an electric arc furnace, according to Metso Outotec.

As a general rule, the Circored process can handle feeds with a particle size of up to 2 mm. However, depending on the decrepitation behaviour, particle sizes of up to 6 mm are possible. For processing ultrafine (< 50 µm) ores or process reverts like scrubber dust, Metso Outotec has patented a microgranulation process.