Displaying items by tag: circular economy
Australian Steel Mill Services and University of Wollongong investigate steel furnace slag applications
30 September 2022Australia: Australian Steel Mill Services (ASMS) and the University of Wollongong have launched an investigation into the possible industrial uses of steel furnace slag (SFS) at the Steel Research Hub in Wollongong, New South Wales. ASMS says that SFS has historically had a lower recyclability than ground granulated blast furnace slag (GGBFS) because of its behaviour when hydrated, which potentially includes expanding. The research team believes that SFS might be a possible ingredient for construction materials, including paving slabs. Tests will involve mixtures of SFS with cement, lime, lignosulphonate, coal wash and plastics.
Australia: Hallett Group plans to establish a slag cement grinding plant in Port Augusta, South Australia. Magnet News has reported the cost of the project as US$83.9m, towards which the producer has received US$13.4m in government funding. The plant will produce cement using South Australian ground granulated blast furnace slag (GGBFS) from Nyrstar’s Port Pirie and Liberty Primary Steel’s Whyalla steel refineries and fly ash from the site of the former Port Augusta power plant. Its operations will be 100% renewably powered. An accompanying new distribution facility at Port Adelaide will ship the cement to markets. The project will create 50 new jobs.
When the Port Augusta grinding plant becomes operational in 2023, its products will reduce regional CO2 emissions by 300,000t/yr, subsequently rising to 1Mt/yr, according to the company’s expansion plans.
Hallett Group chief executive officer Kane Salisbury said "We're talking about 1% of the entire country's 2030 [CO2 reduction] commitment, delivered through this project." Salisbury added "We're looking at turning South Australia into a global leader in manufacturing green cement."
India: Three new Indian concrete companies have separately secured agreements for the use of Finland-based Betolar’s Geoprime alkali-activated slag and fly ash additive. Reuters News has reported that the companies are Balaiji Cement Products, Shiv Tiles and SNEH Precast. Engineering company Godrej & Boyce has also signed a letter of intent with the supplier for pilot production of concrete blocks, paving slabs and other elements.
Betolar expects producers to achieve global concrete production volumes of 250,000t/yr of concrete containing Geoprime by 2023.
Vietnam: Trung Hieu Development Corporation has secured a five-year contract to use Betolar’s alkali-activated slag and fly ash-based concrete additive Geoprime. Trung Hieu Development Corporation plans to source the materials for Geoprime from local industrial side streams. Dow Jones Institutional News has reported that the move will eliminate 80% of raw materials CO2 emissions across its 120,000t/yr-worth precast concrete production capacity.
Betolar's Head of Asia Juha Pinomaa said "Vietnam is the world's third largest cement producer and fourth largest cement consumer, with 85Mt/yr. We estimate that the Vietnamese market represents significant commercial potential for us in the coming years due to the huge potential for cement replacement.” He concluded “We can promote the local circular economy and accelerate Vietnam's sustainable development efforts by directly offering cement-free alternatives. The Vietnamese steel and energy industry generates large amounts of steel slag and fly ash as side streams, which can be used for Geoprime-based concrete."
Spain: Cemex España has received clearance from the Balearic Islands Environmental Commission (CMAIB) to import up to 10,000t/yr of granulated blast furnace slag (GBFS) to Majorca. Ultima Hora Online News has reported that the producer will substitute some of the limestone used in the plant's cement production with the material.
Waste management company Tirme previously handled the Lloseta cement plant's slag supply.
UK: A team of researchers from six UK universities has filed a patent for a clinkerless cement product called Cambridge Electric Cement. Local press has reported that the project, called UK Fires, saw researchers successfully produce the cement using renewable power from recycled cement powder and ground granulated blast furnace slag (GGBFS). Following its successes, UK Fires has obtained a further Euro2m in funding from the UK Engineering and Physical Sciences Research Council (EPSRC) to continue its work into the range of concrete wastes suitable for use in Cambridge Electric Cement production.
Hoffmann Green Cement Technologies’ clinkerless cement secures Scientific and Technical Center for Building certification
25 March 2022France: The Scientific and Technical Center for Building (CSTB) has certified Hoffmann Green Cement Technologies’ clinkerless H-UKR alkali-activated slag cement for structural use in buildings of all types. BusinessWire News has reported that the certification confirms the product’s safety, sustainability, lifespan and performance in conformity with Eurocode 2 and Eurocode 8 design standards.
Co-founders Julien Blanchard and David Hoffmann said “In the midst of ongoing frenetic communication regarding carbon neutrality, Hoffmann Green Cement is as usual endeavouring to back its announcements with verified and evaluated elements. The granting of these evaluations further objectifies the quality of our cement, notably with the awarding of a lifespan of 100 years. In this regard, we would like to thank the CSTB’s teams for drafting this unprecedented technical appraisal and our own teams who are working tirelessly on seeking innovative decarbonised solutions to preserve tomorrow’s world.”
Continental New Materials to produce clinker-free cement using ground granulated blast furnace slag
25 February 2022South Korea: Continental New Materials has awarded a granulated blast furnace slag (GBFS) supply contract to steel producer POSCO. Continental New Materials applies technology developed at the Ulsan National Institute of Science Technology (UNIST) to produce clinker-free cement.
POSCO's hot rolled and wire rod marketing manager Kim Dae-Up said "We will continue to provide support so that POSCO's steel by-products can become eco-friendly cement materials and contribute further to carbon reduction."
ArcelorMittal discuss role of slag in circular economy
12 January 2017France: ArcelorMittal has discussed the role of slag in the circular economy at a recent media event in Paris. Alan Knight, head of corporate responsibility, described how steel plays a key role in the circular economy, at a time when the European Union is debating its Circular Economy Package, which includes revised legislative proposals on waste. He detailed a number of projects at ArcelorMittal that are using waste created during the steelmaking process including turning steelmaking slag into agricultural fertiliser as well as making bioethanol to fuel aeroplanes from waste gases created during the steelmaking process.
“At ArcelorMittal we are active in being involved in a number of different partnerships that look to more fully utilise and exploit the potential from re-using by-products and waste gases. We are fully supportive of the concept of carbon capture and utilisation and convinced that this offers an important long-term opportunity for the reduction of CO2,” said Knight.
Key topics discussed at the event included the effects of Chinese steelmaking overcapacity upon the European industry. David Clarke, ArcelorMittal’s head of strategy and chief technology officer, said that imports of steel are effectively ‘swallowing’ up a slow increase in European steel consumption since the market crash in 2009. However, Europe Flat Products chief executive officer Geert Van Poelvoorde added that the European steel industry could prosper under the right legislative framework.