Kinetics of Spinel Formation and Growth during Dissolution of MgO in CaO-Al2O3-SiO2 Slag

Investigation of High-Temperature Slag/Copper/Spinel Interactions

“…Within different types of experimental publications, the fast formation of spinel solids has already been observed. Nightingale and Monaghan [51] observed the formation of spinel crystals within seconds after the submersion of MgAl 2 O 4 in a slag containing CaO, Al 2 O 3 , and SiO 2 . Scheunis et al [52] investigated the interaction between magnesia chromite refractory and a spinel saturated PbO non-ferrous slag, for which the formation of a new spinel layer with a growth rate of 290.5 lm 2 /h was observed.…”

Dissolution rate and mechanism of solid MgO particles in synthetic ladle slags

“…So, it is possible that the MgO particle primarily reacts with the liquid slag in the boundary and forms the spinel on the surface of MgO particle. Once the spinel forms, the liquid flow and the large difference in lattice parameters between MgO and MgAl 2 O 4 lead to a significant strain at the interface [19][20][21], which results in the spinel layer detaching from the MgO core and moving toward the bulk slag to form a ring-like wall. Consequently, a gap forms between the spinel wall and the MgO core, and the liquid slag fills it quickly and forms the inner slag.…”

Initial Wetting and Spreading Phenomena of a CaO–SiO2 Liquid Slag on MgO Substrates

“…7 we plot the ratio of inertial force to viscous force using Eq. (1) for θ < 90°with the known parameters for the slag σ LV = 400 mN/m, 16) ρ = 2.56 g/cm 3 , 17) and η = 0.2 Pa·s 18) to see which effect is dominant in spreading of the droplet. It shows that the viscous force is dominant over the inertial force throughout the spreading after the transient stage where θ > 90°.…”

“…The corrosion mechanism of the refractories is investigated by many researchers: the dissolution of the refractory material into the slag and the penetration of the slag into the refractory material. [1][2][3][4][5][6] The dissolution rate of MgO refractory into oxide slags strongly depends on the slag composition and temperature. 7) Both dissolution and penetration are considerably affected by wettability.…”