Sulfide Capacities in the Al₂O₃–CaO–MgO–SiO₂ System

Abstract

In the present study, the sulfide capacities of the slags in the ternary Al 2 O 3 -CaO-SiO 2 system at 1873 K, and in the quaternary system Al 2 O 3 -CaO-MgO-SiO 2 at 1823 and 1873 K are experimentally measured using copper-slag equilibrium at controlled oxygen partial pressure. The experimental data, which has been unavailable, are needed for the improvement of a sulfide capacity model. An assessment of the available data for sulfide capacities in the Al 2 O 3 -CaO-MgO-SiO 2 system and its sub lower-order systems are made. Based on this assessment and the present experimental results, the model parameters of the existing sulfide capacity model are re-optimized. The sulfide capacity model can be successfully used in the prediction of the sulfide capacities of multicomponent slags with satisfactory accuracy.

Optimal hot metal desulphurisation slag considering iron loss and sulphur removal capacity part I: fundamentals

“…Table 3 gives an overview of the models for log(C S ) . The KTH model [39] is excluded from this list, because it gave an opposite trend when changing the MgO content. Also the model of Taniguchi et al [40] is excluded, because it is developed for a steel slag composition range, which made it too sensitive for MgO values above 10 wt-%, making it not valid for the HMD slag range.…”

Sulphide capacity of CaO-SiO2-Al2O3-MgO-TiO2-FetO slag with high titanium and high FeO content based on HIsmelt process

“…In the 1990s, Young et al [34] summarized the previous research results and obtained the relationship between Log C S and ^through the experimental data, as Equation (12) and Equation ( 13…”

“…Previous reports primarily focused on slag of the BF ironmaking process [3,6,8,9,[12][13][14][15][16][17]. Compared with blast furnace slag, the smelting reduction represented by HIsmelt has a very high FeO content, up to 8wt-%∼10 wt-%.…”