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Reactivity of crystalline slags in alkaline solution
Published in Springer International Publishing
2019
Pages: 177 - 187
Abstract
Slags with varied amorphous and crystalline content, typical of iron and steel production, are generally underutilized. One promising reuse pathway for these wastes is chemical activation, producing alternatives to conventional building materials with lower embodied energy. The formation of a hardened binder is dependent on the slag mineralogy and, specifically, the reactivity of relevant phases. Reactivity can be understood by monitoring elemental dissolution rates through inductively coupled plasma (ICP-OES) analysis. Post-dissolution ICP analysis of activating solution and spectroscopic analysis of remaining solids was performed on several highly crystalline slags and on relevant synthetic minerals to track changes in chemical and phase composition. Amorphous and ionic phases have been observed as more reactive than other crystalline phases. This work aims to inform future studies on waste blending in alkali-activated systems, a promising avenue for valorization of industrial wastes with varied physicochemical properties. To this end, dissolution tests with varied initial Si, Al, and Ca concentrations in activating solution were also performed. © The Minerals, Metals & Materials Society 2019.
About the journal
JournalData powered by TypesetMinerals, Metals and Materials Series
PublisherData powered by TypesetSpringer International Publishing
ISSN23671181
Open AccessNo
Concepts (19)
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    Alkalinity
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    Blending
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    Crystalline materials
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    Dissolution
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    Inductively coupled plasma
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    Minerals
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    Physicochemical properties
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    Slags
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    Spectroscopic analysis
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    STEELMAKING
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    ACTIVATING SOLUTIONS
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    Alkali activation
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    Alkaline solutions
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    CHEMICAL AND PHASE COMPOSITIONS
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    Crystalline phasis
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    Dissolution rates
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    DISSOLUTION TESTS
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    IRON AND STEEL PRODUCTIONS
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    Chemical activation