Analysis of the Relationship Between Shell Temperature and Liquid Steel Temperature Loss on Casting Ladies

摘要

Improving the liquid steel temperature loss of Casting Ladles plants can significantly reduce costs and increase productivity. This paper assesses what effect reducing the Ladle shell temperature has on the rate of liquid steel temperature loss between the Ladle Furnace and Continuous Caster Tundish. To determine this, a standard Casting Ladle refractory lining was compared to a similar lining that included a 12.7mm thick layer of ISOMAG~R 70 structural insulating board. The 12.7mm insulation board maintains vessel capacity but is an effective barrier to heat flow. In the comparison, the refractory lining incorporating insulation proved to be more efficient in the following areas: Average 30 deg C shell temperature reduction over the whole campaign; More uniform shell temperature around the ladle - no hot spots; Potential for less shell deformation; Less variability in liquid temperature loss for less cold return heats at the Caster, and; Calculated Liquid Steel Temperature Loss at Caster reduced by 25 percent or 0.25 deg C/ min. The relationship between high shell temperature and the rate of liquid steel temperature loss in the ladle is further explored in this paper.