Displaying items by tag: bauxite

Australia: Researchers from Murdoch University in Western Australia have developed a cement-free concrete called Colliecrete. ABC News has reported that the concrete comprises of 80 – 90% fly ash. Other ingredients are bauxite residue and recycled aggregates. Developer Ramon Skane said that customers can make Colliecrete ‘anywhere, at room temperature.’

Germany/Brazil: Researchers at the Martin Luther University Halle-Wittenberg in Saxony-Anhalt and the University of Pará in Pará have produced a cement alternative with 66% reduced CO₂ emissions. A type of calcium sulphoaluminate cement, it replaces up to 60% of limestone in clinker with overburden from bauxite mining. Researchers demonstrated that the resulting product conforms to all standards for commercial Ordinary Portland Cement. The results of the research have been published in ‘Sustainable Materials and Technologies.’

India: Vedanta Aluminium has expressed interest in a long-term collaborative partnership with a cement producer. The Economic Times newspaper has reported that, in such a partnership, Vedanta would supply the producer with fly ash and bauxite residue with which to produced reduced-CO₂ cement. The company said that a cement producer could be its ‘perfect circular economy partner.’

Chief executive officer Rahul Sharma said "We hope the Indian cement producers come forth to work with us on this innovative solution, which is a true win-win scenario for the industry and environment.”

US: Cemtech Materials will produce cement using bauxite residue supplied under a new contract signed with New Day Aluminium Holdings subsidiary Noranda Alumina. Noranda Alumina has executed a letter of intent with Cemtech to sell it 60,000t of bauxite residue starting in the fourth quarter of 2020. The bauxite will be used in the cement production process as the raw material for iron, replacing other current iron bearing raw materials.

Noranda Alumina chair and chief executive officer (CEO) David D’Addario said, “We are focused on continuously improving the sustainability of our business and reducing our environmental footprint on our path to a zero residue refinery, and look forward to helping our partners in the cement industry to achieve their aligned goals.”

The deal follows a beneficial use approval from the Louisiana Department of Environmental Quality. Noranda Alumina is located in Gramercy, Louisiana. It produces smelter grade alumina for the production of aluminium and chemical grade alumina for non-metallurgical applications.

India: Metals producer Hindalco has won a contract to supply fellow Aditya Birla subsidiary UltraTech Cement with 1.2Mt/yr of bauxite residue from its aluminium operations, up by 180% from 250,000t in the 2020 financial year, which ended on 31 March 2020. The Economic Times newspaper has reported that UltraTech Cement will use the bauxite residue – or ‘red mud’ – in cement production at 14 of its plants across seven states. As a result of the deal, Hindalco, the world’s largest producer of rolled aluminium, will have full bauxite residue utilisation across three of its refineries. Managing director Satish Pai said, “We have been working with producers to develop high-grade inputs for the cement industry.”

Brazil: Norway-based Norsk Hydro and the Federal University of Para (UFPA) have announced their collaboration on the development of a low-carbon cement from bauxite residue from Norsk Hydro subsidiary Alunorte’s bauxite mining and alumina refining operations in the state of Pará. Electronic News has reported that the research partnership hopes to develop a new cement for commercial production and sale by 2030. This will use an estimated 500,000t/yr of waste bauxite residue.

Norsk Hydro bauxite and alumina research and development senior manager Erik Araujo said, “Hydro seeks to be a benchmark in sustainability in the aluminium industry. The research is an opportunity to promote intersectional advances in our environmental management, with a reduction in carbon emissions for the cement industry.

Australia/Bangladesh: Australian Bauxite has negotiated a letter of intent with Bangladesh’s Aziz Group. As part of the agreement it will use Aziz Group as its agent to market cement-grade bauxite in the country. The deal will also see Australian Bauxite supply chemical-grade bauxite to Aziz Group for the manufacture of polyaluminum chloride to be used in the treatment of industrial waste water.

"There is a real opportunity for our well established trading and manufacturing relationships to be of significant support in the marketing of this specialised Australian Bauxite cement-grade bauxite. We look forward to jointly developing a good market base for real supply opportunities,” said Johnny Chowdhury, the chief executive officer (CEO) of Aziz Group

Australian Bauxite operates a bauxite mine in Tasmania. It also holds mining tenements in Queensland, New South Wales and Tasmania for future development.

Australia: Australian Bauxite has completed its second and largest shipment of cement-grade bauxite, comprising 35,913t, from its Bald Hill mine.

“We have now demonstrated to all our customers that we can load and ship large tonnage cargos of bauxite very efficiently from Bell Bay Port. It also demonstrates that our stockpiles of bauxite performs very well, having withstood the recent major floods in northern Tasmania, without degrading. This is another landmark step for the company,” said Australian Bauxite’s Chief Operating Officer, Leon Hawker.

The mining company intends to sell its bauxite products into three main markets including cement-grade bauxite for the production of high specification cement. It re-opened its Bald Hill Bauxite Project at Campbell Town in northern Tasmania in early August 2016 ahead of the scheduled date.

Australia: Australian Bauxite has completed its first 5560t shipment of cement-grade bauxite from Bell Bay Port in Tasmania. The shipment is the first from Australian Bauxite’s Bald Hill mine, the first new bauxite project in Australia for more than 35 years. The unnamed customer is preparing for a second shipment of 30,000 – 40,000t to be completed by the end of June 2016. The sales mark a change of direction by Australian Bauxite away from alumina refineries towards specialist cements and fertilisers.