Tata Steel today said it has developed a new technology 'HIsarna' that can not only reduce carbon emissions by at least 20 per cent but also bring down the cost of steel production. The company has been testing the technology at its IJmuiden steelworks in the Netherlands, Tata Steel said, adding "HIsarna has potential to reduce energy use and carbon emissions by at least 20 per cent, reducing steel-making costs through lower-priced raw materials, up to half of which could be recycled scrap steel". HIsarna is a completely new technology in the steel- making process which combines Tata Steel's cyclone converter furnace with Rio Tinto's smelter technology. Now, Tata Steel has acquired the Rio Tinto's smelter technology and intellectual property rights that are required to operate the HIsarna process, the company said. A company official said the technology was being developed jointly by the companies but now Tata Steel has acquired the full intellectual property rights and will operate the technology alone. HIsarna consists of a reactor into which iron ore is inserted at the top.
The ore is liquefied in a high- temperature cyclone and drips to the bottom of the reactor. When powdered coal is injected into the reactor, it combines with the molten ore to produce pure liquid iron and CO2, Tata Steel said explaining how the new technology will work. The technology also removes a number of pre-processing steps, resulting in significant efficiency gains and 20 per cent reductions in energy use and CO2 emissions, it added. Besides, steel products made with this technology can last a lifetime, after which they can be reused, re- manufactured or recycled to create new products, Tata Steel said. Further, the installation of new technology will help produce almost pure CO2, making the gas ideally suited for capture and either storage or use, which could lead to total CO2 savings of 80 per cent from the steel production process. It could also lead to substantial reductions in emissions of fine particles and the reduction of sulphur dioxide and nitrogen oxide. "Acquisition of full intellectual property rights for Hlsarna, is a significant step towards establishing our credentials in the steel manufacturing space and ensuring long term sustainability of the business...," Tata Steel Managing Director T V Narendran said. "HIsarna could play a role in helping society to achieve a circular economy with zero waste," Narendran said.
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