An application of differential thermal analysis to determine the change in thermal properties of mold powders used in continuous casting of steel slabs

An application of infrared analysis to determine the mineralogical phases formation in fluxes for thin slab casting of steel

“…Differential thermal analysis have been carried out in order to determine the changes in thermal properties of mold flux [11,12]. Recently, Dapiaggi et al [13] developed a kinetic analysis on the cuspidine crystallization with differential thermal analysis of mold flux slag.…”

Estimation of Time–Temperature-Transformation Diagrams of Mold Powder Slags from Thermo-analysis of Non-isothermal Crystallization

“…[23] DTA of fresh glass samples and of samples taken from the top of the mold at different times from the start-up of the casting sequence revealed that the thermograms change with time, displaying one peak for unused and two peaks for used powders, but both samples presented the same two crystalline phases. [24] It has been claimed that DTA methods offer the best approach to determine the crystallization temperature of mold powders [25] and to define the extent of crystallization. [26] However, the thermoanalytical methods still do not meet the expectations and several others have arisen.…”

“…Thus, several researchers have processed non-isothermal DTA results that offer useful insights into the crystallization behavior of mold slags. [23,24,[43][44][45][46][47] Using the maximum peak temperature of the dominant exotherm from DTA curves obtained with different heating rates, the activation energy, E, for devitrification has been evaluated as 100 to 450 kJ/mol and it has been claimed that increases with increasing viscosity and decreasing basicity. [43] Comparative DTA measurements during cooling at À0.25 K/s (À15°C/min) showed that increased addition of MnO to a slag caused a considerable decrease in crystallization temperature, and also the authors reported a decrease in viscosity.…”