English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The role of fluorine in the CaO-SiO2-MgO-Al2O3-FetO steelmaking slags was investigated through analyzing the viscous flow and crystallization behaviors of the slags. It was found that the viscosity decreased with increasing CaF2content, which resulted from the decrease of the degree of polymerization (DOP) of the structures, as proved by O1sX-ray photoelectron spectroscopy (XPS) and magic angular spinning nuclear magnetic resonance (MAS-NMR) analysis. The continuous cooling transformation (CCT) diagrams of the primary crystals were also constructed. The results showed that CaF2addition promoted the transformation of the primary crystal from spinel (MgFe2O4) to flourapatite (Ca5(PO4)3F, which was beneficial to the further enrichment of phosphorus. According to19F MAS-NMR results, F-ions mainly coordinate with Ca2+ions to form Ca-F bond. Furthermore, considering the greater stability of P-O-Ca than that of Si-O- Ca bonds, most of the F- ions behave as F-Ca-O-P band, which thus enhanced the formation of Ca5(PO4)3F. Additionally, the non-isothermal crystallization kinetics was further analyzed and the activation energy for the primary crystal growth was derived. © 2016 ISIJ.

Viscous Flow and Crystallization Behaviors of P-bearing Steelmaking Slags with Varying Fluorine Content