Abstract
With the increasing of scrap usage in steelmaking processes, the melting of scrap becomes a very important phenomenon that limits the productivity and tap-to-tap time. Ice-water systems have been widely used to study the melting of scrap and alloys. In this study, the melting rate of saturated KCl solution ice spheres in gas-water two-phase plume zone are studied as a function of height of location, gas flowrate, and melt temperature. The results show that the shape of the ice sphere gradually changes firstly from spherical to elliptical, and finally becomes an irregular state. 1) The decreasing of the distance between the ice sphere and the bottom plugs, 2) the increasing of the gas flowrate, 3) the slightly increasing of bath temperature will all benefits the melting rate of ice spheres.
Highlights
With the international trade trend becoming more unstable, international iron ore prices continue to rise
1) The decreasing of the distance between the ice sphere and the bottom plugs, 2) the increasing of the gas flowrate, 3) the slightly increasing of bath temperature will all benefits the melting rate of ice spheres
The melting rate of saturated KCl solution ice spheres in gas-water two-phase plume zone are studied as a function of height of location, gas flowrate, and melt temperature
Summary
With the international trade trend becoming more unstable, international iron ore prices continue to rise. Experimental results have been obtained for heat transfer to melting ice spheres by measuring the rate of change of apparent weight. S. Taniguchi et al.[4] studied the effect of gas injection upon the melting rate of an ice sphere in a water bath. Heat transfer coefficient was obtained from the experiment in which the melting rate of an ice sphere was measured. The melting characteristics of scrap steel in the converter was studied through water model experiments. The ice made by the denser KCl salt solution could be used to simulate the heavier scrap steel. The melting of saturated KCl solution ice spheres in gas-water two-phase plume zone are studied for a better understanding of the melting of heavier scrap steel. The dimensionless diameter is obtained and used to analysize the melting rate of ice sphere
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