Initial Wetting and Spreading Rates Between SiC and CaO-SiO2-MnO Slag

Abstract

The wetting of CaO-SiO 2 -MnO slag on silicon carbide was studied with a variety of slag compositions at 1823 K (1550°C). Wetting experiments were performed by the dispensed drop technique. We observed complete wetting of the slag on SiC (within 1 second) without a bubble reaction regardless of the basicity (=CaO/SiO 2 = C/S ratio). However, after 8 seconds, the bubble reaction was observed under conditions of C/S = 0.8 and 1.1, whereas it was not observed at temperatures lower than 1823 K (1550°C). The contact angle was independent of MnO content, while the spreading rate increased with the increasing MnO content at the early stage of wetting. Inertial force acts on the early stage of spreading, and viscous force acts with lower MnO content due to higher viscosity. The low-viscosity slag did not fit with the nonreactive viscous model. However, the high-viscosity slag fitted the model well.

Viscosity of CaO–MgO–Al2O3–SiO2 melts containing SiC particles

“…Park et al . [19] carried on the wetting experiments of CaO–SiO 2 –MnO on SiC by the dispensed drop technique. The results showed that molten CaO–SiO 2 –MnO slags have good wettability on SiC.…”

“…They found that the wetting angle changes from 20°to 73°in Ar and from 58°to 87°in a CO atmosphere. Park et al [19] carried on the wetting experiments of CaO-SiO 2 -MnO on SiC by the dispensed drop technique. The results showed that molten CaO-SiO 2 -MnO slags have good wettability on SiC.…”

Research on the corrosion behavior of low carbon mold flux on submerged nozzle refractory

“…Generally, the corrosion resistance of refractory can be roughly estimated by measuring the contact angle between slag and refractory. [25][26][27] Liu et al 28 studied the wetting and erosion behavior between slag with different alkalinity and MgO-C refractories by using the sessile drop method. The results show that the higher the alkalinity of the slag, the weaker the corrosion of the slag on MgO-C refractories.…”

“…The corrosion behavior between slag and refractory is closely related to the wettability between the two phases. Generally, the corrosion resistance of refractory can be roughly estimated by measuring the contact angle between slag and refractory 25–27 . Liu et al 28 .…”

Wetting and Spreading Kinetics between Liquid CaO–SiO₂ Slags and a Solid SiO₂

“…Several researchers have conducted studies on wetting between solid ceramic substrates and liquid slags. [5][6][7][8][9][10][11][12][13][14][15] Wetting studies using SiO 2 have also been conducted, but not with liquid slag. [16][17][18] Many factors affect the contact angle, including the solubility of the two materials.…”