Towards A zero CO2 Sintering

ended

In order to allow steelmakers to comply with ever stringent environmental constraints, TACOS project aims at evaluating solutions bringing significant decrease of CO2 with consequently decrease of others main pollutants (a.o. NOx, SOx, VOC’s, dioxins and dust emissions) : - High bed heights operation for improved process internal thermal efficiency; - Waste gas recirculation (selective and non-selective); - Use of alternative heat inputs : (i) Alternative solid fuels (such as biomass) with or without pre-processings (gasification, hydrothermal conversion, torrefaction and pyrolysis); (ii) Combustible gases for injection at strand surface in combination with Waste Gas Recirculation to take profit of the recirculation hood; (iii) High temperature fumes produced in an external combustion chamber. It is a CRM breakthrough technique which, combined with WGR (VeLoSint original lay-out) could reach theoretically up to 50% solid fuel saving. For evaluation of the impact of these solutions on sintering process performances and emissions, tasks consists in modelling work (mathematical model, DEM), lab trials, sinter pot trials and industrial measuring campaigns and trials. These solutions have significant impacts on Blast Furnace process, so a special focus is also placed on their impact on sinter quality (especially on its vertical segregation) and BF performances. For that purpose a a very wide set of complementary tools not use in usual industrial practise will be used and Multi-Point Vertical Probing’s will be carried out. There are 5 partners participating to the project : CRM (BE - coordinator) ,ArcelorMittal Maizières (FR), Tata Steel IJmuiden (NL), RINA-CSM (IT) and ArcelorMittal Belgium, Gent site (BE)