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Effect of Gahnite on Properties of High Alumina Castable.
- Source :
- Bulletin of the Chinese Ceramic Society; Dec2023, Vol. 42 Issue 12, p4518-4523, 6p
- Publication Year :
- 2023
-
Abstract
- In this paper, gahnite (ZnAl<subscript>2</subscript> O<subscript>4</subscript>) was prepared with solid phase reaction by ZnO and Al<subscript>2</subscript> O<subscript>3</subscript> as raw materials. The micro-structure change of ZnAl2 O4 was researched when ZnO/Al<subscript>2</subscript> O<subscript>3</subscript> molar ratios were 1.0 : 0. 9, 1.0 : 1.0 and 1.0: 1.1, respectively. In addition, the effect of ZnAl<subscript>2</subscript> O<subscript>4</subscript> on properties of high alumina castables were studied. The results show that when the molar ratio of ZnO to Al<subscript>2</subscript> O<subscript>3</subscript> is 1.0: 0.9, due to the excessive ZnO, it volatilizes because of the removal of O<superscript>2-</superscript> to produce liquid phase, and the surface of ZnAl<subscript>2</subscript> O<subscript>4</subscript> particles is microporous structure. When the molar ratio of ZnO and Al<subscript>2</subscript> O<subscript>3</subscript> is 1.0: 1.0 (standard molar ratio), the surface of ZnAl<subscript>2</subscript> O<subscript>4</subscript> particles with standard molar ratio is smooth. The lattice strain value (0.085 86) of standard molar ratio ZnAl<subscript>2</subscript> O<subscript>4</subscript> is the smallest, which can capture more manganese ions and iron ions in steel slag. When the molar ratio of ZnO to Al<subscript>2</subscript> O<subscript>3</subscript> is 1.0: 1.1, the surface of ZnAl<subscript>2</subscript> O<subscript>4</subscript> particles is rough. The high alumina castable with standard molar ratio ZnAl<subscript>2</subscript> O<subscript>4</subscript> has denser structure, highest strength and best slag resistance. [ABSTRACT FROM AUTHOR]
- Subjects :
- ALUMINUM oxide
IRON ions
MECHANICAL drawing
RAW materials
MICROSTRUCTURE
SLAG
Subjects
Details
- Language :
- Chinese
- ISSN :
- 10011625
- Volume :
- 42
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Bulletin of the Chinese Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 174211265