Application of the Flood-Grjotheim Thermodynamic Treatment to the Slag-Metal Equilibria

Grjotheim, K.; Brun, Milivoj K.

doi:10.1179/cmq.1977.16.1.161

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Flood & Grjotheim's Ionic Theory of Slags [Grjotheim K et Brun MK, 1977], they proposed that the electrical equivalence of the fraction of ions is given by the effect of the electrical charge and the amount of each ion present in the slag: simple cations and mobile (Ca +2 , Fe +2 , Fe +3 , Mn +2 , Mg +2 ), non-metallic anions (O -2 , S -2 , F -) and complex anions (SiO4 -4 , PO4 -3 , AlO3 -, FeO2 -, Fe2O5 -4 ). Cation formation provides oxygen (O -2 ) anions and complex anion formation will consume these oxygen (O -2 ) anions in the slag.…”

Section: -The Influence Of Nepheline As a Former Of Steel Slagmentioning

confidence: 99%

Uso De Nefelina Na Aciaria: Uma Revisão

Malynowskyj,

Macarini,

Borges

et al. 2023

ABM Proceedings

View full text Add to dashboard Cite

The technological characteristics of the use of nepheline as a substitute for traditional fluorine-based fluxes are presented, detailing the physical-chemical mechanism and its influence as a former of steel slag. A summary is made of the use in steelmaking processes such as desulphurization of pig iron (De-S), primary refining (BOF-LD, FEA), De-S in steel casting and ladle metallurgy (Ladle Furnace, AHF, RH-OB ). One of the critical points of this review is the comparison of refractory wear between fluorspar (CaF2) and nepheline in BOF-LD slags, in addition to the influence of nepheline on their viscosity, demonstrating the need for a balance between refractory wear parameters with the fluidity of the slag, so that the metallurgical reactions for refining the steel occur within the standards required for the final product. Questions are raised about the use of fluorspar-free continuous casting flux powders, particularly with regard to greenhouse gases and occupational health. The text is finalized with the thermodynamic simulation (FactSage®) of De-S of hot metal with fluorspar and nepheline, resulting in an equivalence of results in relation to the final S content in the liquid metal, being considered similar with the same amount of flows.

show abstract

Section: -The Influence Of Nepheline As a Former Of Steel Slagmentioning

confidence: 99%