Mperature loss of molten steel may be calculated. Q t T = = (12) mC

January 14, 2022

Mperature loss of molten steel may be calculated. Q t T = = (12) mC p mCP exactly where: T is definitely the Bcr-Abl| temperature distinction of molten steel, C; Q may be the total heat transferred by OSS, J; m is definitely the top quality of molten steel, kg; CP would be the precise heat capacity of molten steel, J/kg C; t would be the time of a furnace age beneath operating circumstances, s. The drop rate of molten steel temperature is usually calculated by Formula (13). V = T t (13)exactly where: V could be the drop rate of steel molten temperature, C/min; T is the temperature difference of molten steel, C; t is definitely the time of a furnace age below operating circumstances, s. Associated parameter values are shown in Table 7.Table 7. Connected parameter values for Formulas (12) and (13). Parameter m t CP (1600 C) Worth 0.717 106 W 1.30 105 kg 5400 s 0.837 103 J/kg CTo sum up, inside a furnace age, the test ladle saves 16.67 C of molten steel temperature loss than the comparison ladle. The calculated outcomes on the mathematical model are extremely close for the 18.8 C drop of steel water temperature measured in Reference [40], the key explanation for the difference of two.13 C is the fact that the thermal conductivity in the insulation layer is 0.042 W/mK, ladle walls transfer heat outward immediately. The molten steel drop rate from the test ladle is 0.18 C/min lower than the comparison ladle (see Appendix A for calculation procedure of temperature loss of molten steel).Coatings 2021, 11,13 of3.two.two. Measuring Outcome Table eight shows the actual measured drop price of steel molten temperature.Table eight. Actual molten steel temperature drop rate. Steel Ladle Condition Comparison ladle Test ladle Comparison ladle Test ladle(a) (d)A (a) (Furnace Age) Early stage (10) later stage (5100)N (b) (Furnace) 24 23 18T (c) ( C) 1585.4 1583.1 1584.9 1585.T (d) ( C) 1577.1 1576.six 1577.two 1579.T (e) (min) 15.four 15.7 14.8 15.( C/min) 0.54 0.41 0.52 0.V (f)The stage of steel ladle; (b) Total number of steel ladle furnaces collected; (c) Average temperature of molten steel right after soft blowing; Average temperature of molten steel on continuous caster platform; (e) Temperature measurement interval. (f) Temperature drop rate of molten steel.It could be PR5-LL-CM01 medchemexpress noticed from Table eight, when the steel ladle furnace age is 10, the temperature drop prices of comparison ladle and test ladle are 0.54 C/min and 0.41 C/min, respectively, the distinction temperature drop rates of is 0.13 C /min. when the steel ladle furnace age is 5100; the temperature drop prices of comparison ladle and test ladle are 0.52 C/min and 0.40 C/min, respectively, the distinction temperature drop rates of is 0.12 C /min. Thus, when the steel ladle furnace age is 100, the temperature drop price of your test ladle could be 0.12.13 C/min decrease than comparison ladle. According to the calculating model, the molten steel drop rate in the test ladle is 0.18 C/min reduce than the comparison ladle within a furnace age. The difference of molten steel temperature drop price among test ladle and comparison ladle is 0.05.06 C/min reduce than obtained by calculation model. The cause is that the thermal insulation effect with the test ladle is far better than comparison ladle, the heat loss with the ladle wall is small, the molten steel temperature is high, as well as the heat loss on the ladle slag layer and bottom is greater than the comparison ladle. Even so, inside the mathematical calculation model, the heat loss of your slag layer along with the ladle bottom isn’t deemed, only the heat loss of ladle wall is deemed [41]. 3.three. Expense Comparison In the produc.