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These non-ferrous slags with potential pozzolanic activity or hydraulic activity can now gradually replace the OPC as cementitious materials (Fig. 1B). Slag can also be applied to AAMs production for S/S, cemented paste backfilling and construction building materials with lower cost (Provis, 2018), higher compressive strength (Farhan et …
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Whereas, the compositions of non-ferrous slags, mostly from base metal production, are generally dominated by Fe and Si with significant but lesser amounts of Al and Ca. As for primary solid phases, olivine-group phases, spinel-group phases, and glass are common among all types of slag. Other silicates, such as melilite, pyroxene, or …
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These are slags from the ferrous metallurgical industry and slags from the nonferrous metallurgical industry [5,24]. As discarded waste products, the world produces approximately 320 to 384 ...
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Non-ferrous metallurgy slags, e.g. copper slags, for example, are often merely used for sandblasting or as road base filler (Dhir et al., 2016; Murari et al., 2014; Piatak et al., 2015). In the Belgian region of Flanders, 376 kt of non-ferrous slag is produced yearly (Ovam, 2016). This is 63 kg/capita or 8.5 % of the cement consumption.
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A practical flowsheet of recycling of Al-containing slags is proposed with the purpose of its further use as the secondary refractory dusting material (SRDM). ... Gel, V.I. and Rudakov, D.N., Development of aluminium scrap melting technology, Non-Ferrous Met., 2013, no. 2, pp. P. 35–39. Thoraval, M. and Friedrich, B., Metal entrapment in slag ...
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The S/S of HM from the non-ferrous slags in AAM and OPC is also reviewed. HM can be stabilized in these materials based on the complex salt effect and isomorphic effects. The major challenges faced in AAMs and OPC for HM stabilization include the long-term durability of the matrix (e.g., sulfate attack, stability of volume).
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Other non-ferrous slags include those generated from phosphate, chromite (FeCr 2 O 4), and Al ores, among others; however, these slag types are not discussed due to the limited number of environmental studies on these slags. Slag can also be generated during the recycling of raw materials (i.e., Pb scrap recycling, alkaline battery recycling ...
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was found to slightly enhance the strength activity of the slags, and the fineness was found to have a mild influence on the strength activity index (SAI) of the slags. Hallet et al. [20] studied the effect of fineness of a non‐ferrous metallurgical slag (NFMS) on the reactivity
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The objective of the study is to determine the leachability of the major phases, including solid solutions, that are present in slags from non-ferrous metallurgy.
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Nonferrous slags are produced during the recovery and processing of nonferrous metal from primary and secondary raw materials. The nonferrous slags are molten by …
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[57] ABSTRACT A process for controlled slow cooling of non-ferrous smelting slags, such as copper slags, for the recovery of the non-ferrous metals contained therein by subsequent crushing, milling and ?otation operations is disclosed. The process comprises the steps of pouring the molten slag into a ladle, allowing the slag to slowly cool and …
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The slags are molten by-products of high temperature processes that are primarily used to separate the metal and nonmetal constituents contained in the bulk ore. When cooled, the molten slag converts to a rocklike or …
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With increasing interest in utilizing metallurgical slags for mineral carbonation, there is a need to find applications for carbonated slags. The scope of this study is to explore the utilization potential of carbonated steel furnace slags (SFS) as supplementary cementitious materials (SCM) to produce low-CO 2 cement-based …
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This opens the door for ferrous and non-ferrous slags which, depending on the type, can enhance the performance of the materials, are price competitive and also can provide an important environmental benefit in …
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Metallurgical slags are generated as a by-product of smelting during ironmaking, steelmaking, and the production of ferroalloys and non-ferrous metals. The formation conditions result in complex chemical and mineralogical characteristics unique to …
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In this document an overview on spinel-containing slags of the non-ferrous metallurgical processes is given, with focus on operation in liquid state. It shows a summary of the current state of experimental and modelling work in this field done by different research groups. The importance of studies on thermodynamic properties and phase …
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Vast amounts of water-cooled non-ferrous metallurgy slags are generated yearly, and significant amounts are unutilized or dumped in landfills. To address this issue, in this study, MgO-FeOx-SiO 2 fayalitic slag (FS) was used as the sole solid precursor (as an aggregate and binder) in alkali-activated mortars. The performance of the mortar ...
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Ferrous slags include blast furnace, steelmaking, and ferroalloy slags; the compositions of these slags are generally dominated by Ca and Si, some with significant Al, Fe, and/or Mg. Whereas, the composition of non-ferrous slags, mostly from base-metal production, are generally dominated by Fe and Si with significant but lesser amounts of …
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The technosphere consists of material stocks accumulated by human activities, which can include processing residue, such as slag. Various smelting processes generate slag, and some valuable elements are concentrated in this by-product. In this review, the extraction of critical and strategic metals from non-ferrous slags is …
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This research investigated the possibility of using metallurgical slags from the copper and lead industries as partial replacement for cement. The studied slags were fayalitic, having a mainly ferro-silicate composition with minor contents of Al2O3 and CaO. The slags were treated at 1200–1300 °C (to reduce the heavy metal content) and then …
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Nonferrous slags are produced in a few locations, often remote from potential markets. As a result, nonferrous slags are not well utilized and most of the nonferrous slag produced is disposed of in slag dumps or stockpiles. MARKET SOURCES Nonferrous slags, when they are used, are marketed directly by the producers.
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As an industrial byproduct of smelter operations, smelting slag has brought certain environmental issues including without taking safety precautions or using appropriate management. Through a thorough analysis of the literature published in the last years, the latest research progress on the characteristics, resource utilization pathways, …
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non-ferrous metal smelting slags: A literature review XU Ze-lin() 1,2 3, YAO Jia-bin(), FU Rong-bing()1,2 3* 1. Centre for Environmental Risk Management and Remediation of Soil and Groundwater, Tongji University, Shanghai 200092, China; 2. State Key Laboratory of Pollution Control and Resource Reuse, College of ...
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Slags with molar ratios of (FeO + CaO)/SiO2 = 1.1–2.3 and FeO/CaO = 1.9–5.4 were synthesized, as they represent slags found within the non-ferrous metallurgical industry. Higher SiO2 content ...
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Ferrous slag: electric arc furnace slag (EAFS) and ladle furnace slag (LFS); and non-ferrous slag: copper slag (CS) and silicon-manganese slag (SiMnS) have …
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Slags are by-products generated by the pyrometallurgical processing of both ferrous and non-ferrous metal ores and secondary resources (recycling). They are formed during smelting from the reaction of gangue minerals in the furnace feed and fluxes and, …
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Non-ferrous slags are granulated and stockpiled as an alternative to pit cooling or transporting molten slag to a dump.
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Ferrous and non-ferrous slags have been used in the manufacture of alkaline activated cements. • The optimisation of the modulus of the activator Ms = SiO2/K2O has been studied. • Optimun technological properties are obtained for CS and EAFS. • Gel formation is observed in all AACs. •
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Although slags from different smelters differ in characteristics, the majority of non-ferrous metal production slags consists of similar phases that differ in proportions. Understanding the relative leachability of these different …
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DOI: 10.1016/j.rnrec.2019.104627 Corpus ID: 213769384; Upcycling of non-ferrous metallurgy slags: Identifying the most reactive slag for inorganic polymer construction materials
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