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Erschienen in:

2018 | OriginalPaper | Buchkapitel

Reaction Behavior of Phosphorus in Multi-phase CaO–FeO_X–SiO₂–P₂O₅ Flux System

verfasst von : Xiao Yang, Hiroyuki Matsuura, Fumitaka Tsukihashi

Erschienen in: Extraction 2018

Verlag: Springer International Publishing

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Abstract

Calcium oxide is one of the major fluxing agents used for steel refining. Because unreacted CaO remains in slag in most cases, discharged slag is difficult to be recycled smoothly. With the growth of environmental concerns, improving utilization efficiency of CaO is required to reduce the amount of discharged slag and energy consumption. The authors have reported a resource and energy-saving process by using multi-phase flux for dephosphorization. Reaction behavior of phosphorus in multi-phase CaO–FeO_X–SiO₂–P₂O₅ flux system was investigated. Formation mechanism of P₂O₅-rich phases was clarified at the interface between solid CaO or 2CaO·SiO₂ and molten CaO–FeO_x–SiO₂–P₂O₅ slag. Phase relationship and thermodynamic properties of 2CaO·SiO₂-3CaO·P₂O₅ solid solution were observed to confirm the condensation of P₂O₅ in solid phase. Based on these results, reduction of CaO consumption, discharged slag curtailment, and energy-saving effects in the novel refining process by using multi-phase flux were discussed.

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Vorheriges Kapitel Calciothermic Reduction and Electrolysis of Sulfides in CaCl2 Melt

Nächstes Kapitel Microanalysis and Experimental Techniques for the Determination of Multicomponent Phase Equilibria for Non-ferrous Smelting and Recycling Systems

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Titel: Reaction Behavior of Phosphorus in Multi-phase CaO–FeOX–SiO2–P2O5 Flux System
verfasst von: Xiao Yang
Hiroyuki Matsuura
Fumitaka Tsukihashi
Verlag: Springer International Publishing
Buch: Extraction 2018
Print ISBN: 978-3-319-95021-1

Electronic ISBN: 978-3-319-95022-8

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-319-95022-8_61

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