China's Refractories ›› 2021, Vol. 30 ›› Issue (3): 1-6.DOI: 10.19691/j.cnki.1004-4493.2021.03.001
Online:
2021-09-15
Published:
2021-11-26
Contact:
ZHAO Huizhong
About author:
Zhao Huizhong is a professor of Wuhan University of Science and Technology, a doctoral supervisor, and a national model of teacher ethics. He graduated from Wuhan Iron and Steel Institute in 1987 and has been engaged in refractory teaching and scientific research for nearly 35 years. He has participated in the national key scientific and technological projects from the State Key Task 75 to State Key Task 95. His main research directions include refractories for new metallurgical technology, harmless treatment and resource utilization of metallurgical solid waste, etc. He has published more than 100 papers in academic journals including more than 60 papers in SCI.
ZHAO Huizhong, LI Jingjie. Effect of Spinels on Properties of MgO-Al2O3 Refractories for RH Snorkels[J]. China's Refractories, 2021, 30(3): 1-6.
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URL: http://www.cnref.cn/EN/10.19691/j.cnki.1004-4493.2021.03.001
Starting materials | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | IL | True density /(g · cm-3) | Particle density /(g · cm-3) |
---|---|---|---|---|---|---|---|---|
Fused magnesia | 2.06 | 0.25 | 0.67 | 1.44 | 92.88 | 0.27 | 3.62 | 2.86 |
High purity sintered magnesia | 0.78 | 0.14 | 0.59 | 1.44 | 96.02 | 0.35 | 3.60 | 3.16 |
MA50 spinel | 0.56 | 50.42 | 0.48 | 0.76 | 46.23 | 1.18 | 3.53 | 3.13 |
MA66 spinel | 0.38 | 65.60 | 0.38 | 0.56 | 31.53 | 1.19 | 3.56 | 3.46 |
MA78 spinel | 0.28 | 76.80 | 0.25 | 0.44 | 21.70 | 0.26 | 3.50 | 3.07 |
Table 1 Chemical and physical properties of main starting materials
Starting materials | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | IL | True density /(g · cm-3) | Particle density /(g · cm-3) |
---|---|---|---|---|---|---|---|---|
Fused magnesia | 2.06 | 0.25 | 0.67 | 1.44 | 92.88 | 0.27 | 3.62 | 2.86 |
High purity sintered magnesia | 0.78 | 0.14 | 0.59 | 1.44 | 96.02 | 0.35 | 3.60 | 3.16 |
MA50 spinel | 0.56 | 50.42 | 0.48 | 0.76 | 46.23 | 1.18 | 3.53 | 3.13 |
MA66 spinel | 0.38 | 65.60 | 0.38 | 0.56 | 31.53 | 1.19 | 3.56 | 3.46 |
MA78 spinel | 0.28 | 76.80 | 0.25 | 0.44 | 21.70 | 0.26 | 3.50 | 3.07 |
No. | MA50 spinel | High purity sintered magnesia | Fused magnesia fine powder | |
---|---|---|---|---|
3-1 mm | 5-2 mm | 2-0 mm | <0.088 mm | |
O | 0 | 37 | 40 | 23 |
A | 14 | 30 | 33 | 23 |
B | 16 | 30 | 31 | 23 |
C | 18 | 30 | 29 | 23 |
D | 20 | 30 | 27 | 23 |
Table 2 Formulations for investigation of spinel addition effect /mass%
No. | MA50 spinel | High purity sintered magnesia | Fused magnesia fine powder | |
---|---|---|---|---|
3-1 mm | 5-2 mm | 2-0 mm | <0.088 mm | |
O | 0 | 37 | 40 | 23 |
A | 14 | 30 | 33 | 23 |
B | 16 | 30 | 31 | 23 |
C | 18 | 30 | 29 | 23 |
D | 20 | 30 | 27 | 23 |
Specimens | MA50 spinel | High purity magnesia | Fused magnesia | |
---|---|---|---|---|
5-2 mm | 2-0 mm | <0.088 mm | ||
With <0.088 mm spinel | 16 | 40 | 37 | 7 |
With 1-0 mm spinel | 16 | 31 | 33.5 | 19.5 |
With 1-3 mm spinel | 16 | 30 | 31 | 23 |
Table 3 Formulations for investigating influence of MA50 spinel size /mass%
Specimens | MA50 spinel | High purity magnesia | Fused magnesia | |
---|---|---|---|---|
5-2 mm | 2-0 mm | <0.088 mm | ||
With <0.088 mm spinel | 16 | 40 | 37 | 7 |
With 1-0 mm spinel | 16 | 31 | 33.5 | 19.5 |
With 1-3 mm spinel | 16 | 30 | 31 | 23 |
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