Evaluation of Mass Transfer Coefficient during Scrap Melting
Abstract
:1. Introduction
2. Experimental Determination of Mass Transfer Coefficient
2.1. Experimental Set-Up and Description
2.2. Calculation of Mass Transfer Coefficient
3. Qualitative Evaluation of Factors Affecting Mass Transfer Coefficient
3.1. Correlation Analysis of the Factors Affecting Mass Transfer Coefficient
3.2. Qualitative Evaluation of Mass Transfer Coefficient Using the Entropy Weight Method
4. Quantitative Evaluation of Mass Transfer Coefficient Using Explicit Functions
4.1. Explicit Function under Natural Convection Conditions
4.2. Explicit Function under Forced Convection Conditions
4.3. Validation of Explicit Functions under Natural and Forced Convection Conditions
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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C | Si | P | Mn | S | |
---|---|---|---|---|---|
Q235 low-carbon steel rod | 0.168 | 0.110 | 0.041 | 0.391 | 0.0227 |
Q235 low-carbon steel plate | 0.182 | 0.17~0.37 | ≤0.030 | 0.35–0.65 | 0.0011 |
45# steel rod | 0.491 | 0.27 | 0.035 | 0.65 | 0.035 |
QT500-7 Ductile iron rod | 3.69 | 1.653 | 0.0077 | 0.0825 | 0.0125 |
Iron/carbon bath | 4.61 | 0.42 | 0.17 | 0.33 | 0.04 |
Serial Number | Bath Temperature | Stirring Energy Density | Specific Surface Area | Carbon Content | Mass Transfer Coefficient |
---|---|---|---|---|---|
- | K | W/t | m2/t | wt% | ×10−4 m/s |
1 | 1573 | 0 | 56.03 | 0.168 | 0.314 |
2 | 1623 | 0 | 56.03 | 0.168 | 0.333 |
3 | 1673 | 0 | 56.03 | 0.168 | 0.501 |
4 | 1723 | 0 | 56.03 | 0.168 | 0.531 |
5 | 1573 | 0.0249 | 56.03 | 0.168 | 0.750 |
6 | 1573 | 0.0997 | 56.03 | 0.168 | 1.097 |
7 | 1573 | 0.2243 | 56.03 | 0.168 | 1.540 |
8 | 1673 | 0.0249 | 56.03 | 0.168 | 0.842 |
9 | 1673 | 0.0997 | 56.03 | 0.168 | 1.159 |
10 | 1673 | 0.2243 | 56.03 | 0.168 | 1.720 |
11 | 1573 | 0 | 56.03 | 0.491 | 0.379 |
12 | 1573 | 0 | 52.7 | 0.180 | 0.131 |
13 | 1573 | 0 | 95.02 | 0.180 | 0.452 |
14 | 1573 | 0 | 121.2 | 0.180 | 0.569 |
15 | 1573 | 0 | 85.87 | 0.180 | 0.375 |
Bath Temperature | Stirring Energy Density | Scrap Specific Surface Area | Scrap Carbon Content | |
---|---|---|---|---|
Mass transfer coefficient | 0.533 | 0.960 | 0.362 | 0.016 |
Influencing Factors | Factors | Serial Number | Value | Rank | |
---|---|---|---|---|---|
Bath temperature | Bath temperature | r1 | 0.0453 | 0.0453 | 2 |
r2 | 0.0359 | ||||
r3 | 0.0541 | ||||
r4 | 0.0573 | ||||
Stirring of the molten pool | Rotating speed | r5 | 0.1279 | 0.1279 | 1 |
r6 | 0.1184 | ||||
r7 | 0.1663 | ||||
r8 | 0.0909 | ||||
r9 | 0.1251 | ||||
r10 | 0.1857 | ||||
Scrap type | Carbon content | r11 | 0.0411 | 0.0411 | 3 |
Scrap specific surface area | r12 | 0.0141 | |||
r13 | 0.0488 | ||||
r14 | 0.0614 | ||||
r15 | 0.0405 |
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Gao, M.; Gao, J.-T.; Zhang, Y.-L. Evaluation of Mass Transfer Coefficient during Scrap Melting. Metals 2021, 11, 1368. https://doi.org/10.3390/met11091368
Gao M, Gao J-T, Zhang Y-L. Evaluation of Mass Transfer Coefficient during Scrap Melting. Metals. 2021; 11(9):1368. https://doi.org/10.3390/met11091368
Chicago/Turabian StyleGao, Ming, Jin-Tao Gao, and Yan-Ling Zhang. 2021. "Evaluation of Mass Transfer Coefficient during Scrap Melting" Metals 11, no. 9: 1368. https://doi.org/10.3390/met11091368