Previous studies reported the use of chlorinated roasting for iron extraction from copper slag, but the toxic and harmful gases generated could not be reasonably handled(Guo et al., 2021; Zhang et al., 2023).For this reason, this study proposes for the first time a strategy to recycle and reuse exhaust gas, i.e., to avoid the pollution of exhaust gas to the environment …
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During the BOS process a proportion of the molten iron cannot be recovered so elemental iron is often observed in the slag (Yildirim and Prezzi, 2011). Slags can be classified …
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The merit of this study is manufacturing cheaper roof tiles using fluxed waste material such as granulated iron slag, in addition to the environmental benefit of decreasing the cost and negative impact of their disposal and landfilling. Waste
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Germany-based steel producer Thyssenkrupp Steel Europe is conducting joint research with Australia-based BlueScope Steel that will result in the installation of up to 2.5 million metric tons of annual direct reduced iron (DRI)-content steel production capacity at its complex in Duisburg, Germany.
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Converter slag (obtained by the pig iron indu stry) is not used as much for recycling due to high free lime content, but there is potential if th e free lime is stabiliz ed by carbon ation [1 06 ...
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The secondary slag hardness is lower than that in Case 2 but still quite high. Therefore, it is concluded that Case 1, in which lower flux additions and lower temperature are employed, is better suited for recycling of the initial slag into pig iron and secondary slag phase by achieving desired properties of the two products.
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The recycling trajectory in iron and steel production is promising but poses challenges. This review paper provides a comprehensive overview of research findings on …
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Steel slag recycling primarily involves extracting useful metal components (such as steel particles and iron powder) and properly managing the tailings.
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Recycling: Following removal of entrained metal, slag can be returned to the blast and steel furnaces as ferrous and flux feed, but data on these returns are incomplete. Entrained metal, particularly in steel slag, is routinely recovered ... 2021, world iron slag production was estimated to be between 340 million and 410 million tons, and steel ...
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Scientifically and effectively treating and recycling steel rolling sludge is an inevitable trend under the "dual carbon" goals. ... This paper explored the feasibility of using steel rolling sludge incineration slag in the iron ore sintering process. The study analyzed the influence of incorporating steel rolling sludge incineration slag ...
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Steel slag recycling is a serious problem in China. The volume of steel slag is growing rapidly because the output of steel is steadily increasing; however, slag's utilization remains relatively low. ... Carbothermal reduction of copper smelter slag for recycling into pig iron and glass. Miner. Eng., 107 (2017), pp. 8-19. View PDF View ...
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Mineral process wastes, such as metallurgical slags nowadays, are of significant metals and materials resources in the circular economy. The usability of iron-making slag is well established; however, steel slag still needs to be utilized due to various physicochemical constraints. In this context, we have reviewed the global steel slag generation, processing, …
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account for 80%–90% of the total smelting slag.[1] BFS accounts for about 30% of pig iron output,[2] while SS accounts for 10%–15% of the crude steel output.[3] SS comprises various slags, including basic oxygen furnace slag (BOFS) (or converter slag), electric arc furnace slag (EAFS), ladle furnace slag (LFS), and argon‐oxygen ...
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Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, the comprehensive utilization rate of …
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Iron Unit Recycling On a weight basis, steel is the most recycled material in use today (Figure 3-1). The 70 million net tons of ... iron and steel recovered from slag processing, and defective or rejected products at the mill, e.g. crop ends, side trimmings, …
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Currently, the recycling application of BFS as a resource for carbon reduction and carbon sequestration is mainly to prepare glass-ceramics, cementitious materials, carbon …
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Furthermore, highlighted the significant iron content in copper slag, emphasizing the possibility of recovering and recycling iron along with copper. It recovers copper as an iron-copper alloy and oxides in the final slag (Busolic et al., 2011). Moreover, studies have proposed various methods for iron recovery from copper slag.
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Recycling is at the very heart of the steel industry's commitment to sustainability. By using steel scrap to make new steel, the American steel industry conserves energy, emissions, raw materials and natural resources. ... like slag, water, gasses, dusts and energy. This commitment drives the reduction of steel's environmental footprint ...
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Until now, relevant scholars have done a lot of works on the environmental assessment of various recycling technologies of steel slag. For instance, Qian et al. (Qian et al., 2021) adopt Bacillus Mucilaginosus (BM) to absorb carbon dioxide to promote the carbonization of dead burned lime and periclasepared with traditional cement, Carbonized steel slag as a …
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The invention belongs to the field of recycling of steel slag, in particular to a method for recycling iron from steel slag. The method comprises the following steps of: (1) pouring steel slag into a grate plate with the length and the width of 180 mm respectively, leading the steel slag with granularity smaller than 180 mm to enter an underground material bin and carrying out first iron ...
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The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel industry was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment (LCA) as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental impacts …
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As a result of growing environmental awareness, steel slag is now highly regarded as a recycled material that can reduce environmental impact due to its resource-conservation and energy-saving properties. MEKA is designing and …
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Recently, a re-melting and reducing treatment, in order to recycle iron and modify the chemical composition of the residue, has been carried out. ... SiO 2 can promote reduction and separation of iron and slag. With the 10% of SiO 2, melting time of 30 min, coke of 5%, metallisation rate was 87.30% and metal recovery rate was 96.45% ...
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Slag examined in this study is defined as the predominantly silicate and oxide by-product derived from smelting metallic ore. The two main types of slag included in this discussion are from the primary production of ferrous ores, from iron and steel manufacturing, and from non-ferrous ores, from the recovery of base metals and some precious metals.
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which is slag. Gangue phases, e.g., SiO2 in iron ore, additives, e.g., CaO and MgO, and iron oxide form the basis of iron- ... cessary to explore new slag recycling technologies based on the distinct physical or chemical properties of the slag. Japan and China are two leading steel producing coun-
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Technological innovations in slag recycling are crucial for the steel industries in Japan and China. Here, the current status and developing trends of utilization technologies of slags in both countries are reviewed. ... Annual …
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Waste water-cooled granulated iron slag was ground and added in proportions ranging from 0 to 30 wt.% to kaolin clay to prepare roof tiles for the economic purpose of decreasing the production cost by incorporating cheap waste and to serve sustainability.
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The high‐value utilization of blast furnace slag (BFS) and steel slag (SS) as a valuable resource in the field of carbon reduction represents a green revolution, and also is an indispensable ...
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Waste water-cooled granulated iron slag was ground and added in proportions ranging from 0 to 30 wt.% to kaolin clay to prepare roof tiles for the economic purpose of decreasing the production ...
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DOI: 10.1002/cnl2.137 Corpus ID: 270465764; Recycling of iron and steel slag for carbon reduction and low‐environment load application @article{Xu2024RecyclingOI, title={Recycling of iron and steel slag for carbon reduction and low‐environment load application}, author={Ying Xu and Enshuo Li and Chenguang Hu and Fucheng Zhang and Xianguang …
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