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Calcium desulfurization equilibrium in liquid iron
Author(s) -
Inoue Ryo,
Suito Hideaki
Publication year - 1994
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199401184
Subject(s) - flue gas desulfurization , lime , chemistry , crucible (geodemography) , solubility , solubility equilibrium , calcium , sulfur , activity coefficient , slag (welding) , analytical chemistry (journal) , equilibrium constant , metallurgy , mineralogy , nuclear chemistry , inorganic chemistry , materials science , chromatography , aqueous solution , organic chemistry , computational chemistry
Sulfur distribution ratios between CaO‐Al 2 O 3 slags and liquid iron were measured at 1873 K as a function of aluminum content using an alumina or a lime crucible. Activity coefficients of CaS relative to a solid standard state were obtained as 52&2.6 and 23&1.7 for the CaO‐Al 2 O 3 slags saturated with an Al 2 O 3 and a CaO crucible, respectively, in the concentration range up to the CaS solubility limit. From these results, logarithm of the equilibrium constant, log K CaS , for the calcium desulfurization reaction CaS(s) = Ca + S and the first‐order interaction parameter e S Ca ( e S Ca ) were estimated to be –8.72&0.27 and –269&28 (–336&35), respectively.