The biggest challenge for our society, in order to foster the sustainable circular economy, is the efficient recycling of wastes from industrial, commercial, domestic and other streams. The transition to a circular economy is the goal of the European Commission’s Circular Economy Action, which was first launched in 2015. In 2020 the above action plan announced initiatives along the entire life cycle of the product, with the aim to make sustainable products the norm in the EU. Therefore, it is anticipated that the above action will result in an increase in Europe’s economic competitiveness, sustainability, resource efficiency and resource security. Within this context, the suitability of ferroalumina as a raw material in the blast furnace is investigated. Ferroalumina is the product of the high-pressure filter press dewatering process of the Greek red mud generated during the production of alumina by means of the Bayer cycle. Ferroalumina is a low-cost raw material and its possible charging in the blast furnace and/or steelmaking aggregates is a step towards industrial symbiosis, where the wastes, namely by-products, of an industry or an industrial process, become the raw materials for another. In the present work the effect of ferroalumina addition as a raw material was examined by smelting ferroalumina, blast furnace-slag, lime and scrap at 1550°C in a graphite crucible and a constant slag basicity. The increase of the alumina content in the slag improves the desulfurization capacity. Moreover, the silicon exchange between slag and metal was examined. The results indicate that the alkalis’ capacity of the slag increases with the addition of ferroalumina. The analysis of the finally obtained slag suggests that it could be suitable for utilization in slag-cement production.

为了促进可持续循环经济，我们社会面临的最大挑战是有效回收工业、商业、家庭和其他流中的废物。向循环经济转型是欧盟委员会循环经济行动的目标，该行动于 2015 年首次启动。 2020 年上述行动计划宣布了贯穿产品整个生命周期的举措，旨在使可持续产品成为常态在欧盟。因此，预计上述行动将提高欧洲的经济竞争力、可持续性、资源效率和资源安全。在此背景下，研究了氧化铝铁作为高炉原料的适用性。铁铝是通过拜耳循环生产氧化铝过程中产生的希腊赤泥，通过高压压滤机脱水工艺的产物。铝铁是一种低成本的原材料，它可能在高炉和/或炼钢骨料中装料是迈向工业共生的一步，工业或工业过程的废物，即副产品，成为原材料其他。在目前的工作中，通过在石墨坩埚中在 1550°C 和恒定的炉渣碱度下熔炼铝铁、高炉炉渣、石灰和废钢来检验添加铝铁作为原料的效果。渣中氧化铝含量的增加提高了脱硫能力。此外，检查了炉渣和金属之间的硅交换。结果表明，随着铁氧化铝的加入，渣的碱容量增加。对最终获得的矿渣的分析表明它可以适用于矿渣水泥生产。