A New Sulfide Capacity Model for CaO-Al₂O₃-SiO₂-MgO Slags Based on Corrected Optical Basicity

Abstract

A new sulfide capacity model for CaO‐Al2O3‐SiO2‐MgO slags has been developed based on corrected optical basicity. The present model has taken charge compensation into consideration and postulated that Al exits in the form of [1/2Ca(AlO4)]4– when NCaO is higher than NAl2O3 in slag. The model predicted sulfide capacities agree well with experimental measured values for CaO‐Al2O3, CaO‐Al2O3‐SiO2, CaO‐Al2O3‐MgO, and CaO‐Al2O3‐SiO2‐MgO slags. A mean deviation of 3.23% is achieved for the present model in basic Al2O3 containing slags and this value is obviously lower than that of other models. The applicable range of the present model is given.

Effect of TiO₂ on Viscosity and Sulfide Capacity of Blast Furnace Slag Containing Barium

“…where Λ represents the optical basicity, X i represents the mole fraction of oxide component i, n i is the number of oxygen in oxide component i, Λ i is the theoretical optical basicity of the pure oxide component i. When studying the properties of blast furnace slag containing Al 2 O 3 , Mills et al [24][25][26] had taken into account of the effect of the charge compensation of Ca 2+ for [AlO 4 ] tetrahedron and proposed a method of modifying the optical basicity to corrected optical basicity. According to Wang et al, 21) Where Λ corr is the corrected optical basicity; Λ i is the optical basicity of slag component i; x i is the mole fraction of slag component i, respectively.…”

Sulphide Capacity of CaO–SiO₂–Al₂O₃–MgO System Relevant to Low MgO Blast Furnace Slags

“…[4][5][6][7][8][9][10] The reported sulphide capacity models can be classified as empirical models and theoretical models, as summarized in Table 4. The comparison of experimental data along with the estimated values by those models is shown in Fig.…”

Research Progress of Desulfurization Refining Slag: A Review

“…Metallurgists have developed several sulfide capacity prediction models to describe the relationship between sulfide capacity and slag composition, such as the KTH and optical basicity models. [68][69][70][71][72][73][74][75][76] Table 3 displays typical sulfide capacity models for slag and the improvements made by later generations.…”