1,721,009 research outputs found
Modelling of an Ozonation Process for Cyanide Removal from Blast Furnace Gas-Washing Water and Analyses of Process Behaviour in Different Scenarios
No full textA Simulation Assessment of Modifications of the Water Network of an Electric Arc Furnace Steelworks to Allow Wastewater Reuse
No full textEvaluation of Internal Slag Reuse in an Electric Steelmaking Route: Simulation Analyses through the EIRES Monitoring Tool
No full textWater Process Integration: Assessment of an Ultrafiltration and Reverse Osmosis-Based Treatment to Regenerate Coke-Making Area Wastewater
No full textOptimization of By-Products Reuse in the Steel Industry: Valorization of Secondary Resources with a Particular Attention on Their Pelletization
No full textAn improvement of by-products reuse contributes to reduce the environmental impact of industries and to increase their competitiveness. Within the steel production cycle, several by-products are produced: slags, sludges, scales, dusts. Some of them are directly suitable to the internal reuse, other ones can be separated in fractions that can
be used internally or sold for external use. This paper shows an analysis focused on the optimization of by-products reuse in an Italian Integrated Steelworks with a particular attention on the internal recycling in the pelletization process. Starting from previous studies on the selection of suitable by-products and treatments, the paper presents, firstly, the development of a superstructure model using reMIND® software in order to find optimal solutions, considering quality and environmental constraints, and to minimize operating costs. Furthermore, the evaluation and the optimization through laboratory or simulation tests of possible mixtures of by-products to be used in pelletization is also discussed. By-product mixtures were evaluated to the aim of achieving good pellets formation, according to the number, size of pellets and the compression test results. This study shows that a particular scenario is capable to jointly reduce costs and environmental impact as well as to obtain high quality pellets that can maximize the internal reuse in sinter plant of by-products in a particular "winning formula" (BOF slag 65wt%, BOF sludge 27wt%, dolime 1wt%, cement 7wt%). These preliminary results show that a good by-products management could provide
important advantages to the companies by contributing to the "zero waste" target
Application of Unconventional Techniques for Evaluation and Monitoring of Physico-Chemical Properties of Water Streams
No full text
Simulation techniques for an efficient use of resources: an overview for the steelmaking field
No full textQuantification of energy and environmental impacts in uncommon electric steelmaking scenarios to improve process sustainability
No full textThe electric steel production is in line with the circular economy concept due to the reuse of scrap. However, being energy intensive industries with a significant environmental impact, electric steelworks can increase their competitiveness and environmental sustainability through an adequate management of resource and energy. The paper presents a work related to the quantification of electric energy consumption and environmental impact of unconventional electric steelmaking scenarios while simultaneously monitoring the steel composition. The exploitation of an ad-hoc developed Decision Support Tool highlights that scrap quality strongly affects the monitored energy and environmental parameters (quantified in terms of Key Performance Indicators and aggregated in a Global Index). Moreover, the developed simulations pointed out that the removal of Fe-alloy addition during EAF tapping allows reducing slag and improving the yield by preserving also the steel quality while slightly increasing the electric energy consumption: in countries where the price and the emissions related to the production of electricity are low, this can be a good compromise to improve the environmental sustainability of the sector. The study shows that also limited modifications of the well-known electric steelmaking process could help to increase the sustainability of this energy intensive industrial production route
- …
