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Al2O3-Cr2O3 refractory aggregate and preparation method thereof
The invention belongs to the field of refractory materials and relates to an Al2O3-Cr2O3 refractory aggregate and its preparation method. The Al2O3-Cr2O3 refractory aggregate has nonuniform chemical composition. Content of Cr2O3 at peripheral position of the Al2O3-Cr2O3 refractory aggregate is greater than or equal to 20%, and content of Cr2O3 at the central position is lower than Content of Cr2O3 at the peripheral position. Porosity of the Al2O3-Cr2O3 refractory aggregate is not more than 10%. Al2O3 and Cr2O3 in the refractory aggregate form uniform solid solutions. Particles and a coating are combined tightly, and strength is high. A diffusion reaction of Al2O3 and Cr2O3 at high temperature causes Cr2O3 concentration attenuation from the surface layer to the center of the aggregate. An Al2O3-Cr2O3 refractory product prepared from the refractory aggregate has good slag corrosion resistance. Meanwhile, utilization rate of chromium resources is high.
Al2O3-Cr2O3 refractory aggregate and preparation method thereof
The invention belongs to the field of refractory materials and relates to an Al2O3-Cr2O3 refractory aggregate and its preparation method. The Al2O3-Cr2O3 refractory aggregate has nonuniform chemical composition. Content of Cr2O3 at peripheral position of the Al2O3-Cr2O3 refractory aggregate is greater than or equal to 20%, and content of Cr2O3 at the central position is lower than Content of Cr2O3 at the peripheral position. Porosity of the Al2O3-Cr2O3 refractory aggregate is not more than 10%. Al2O3 and Cr2O3 in the refractory aggregate form uniform solid solutions. Particles and a coating are combined tightly, and strength is high. A diffusion reaction of Al2O3 and Cr2O3 at high temperature causes Cr2O3 concentration attenuation from the surface layer to the center of the aggregate. An Al2O3-Cr2O3 refractory product prepared from the refractory aggregate has good slag corrosion resistance. Meanwhile, utilization rate of chromium resources is high.
Al2O3-Cr2O3 refractory aggregate and preparation method thereof
SUN HONGGANG (author) / LI PENGTAO (author) / LI HONGXIA (author) / WANG GANG (author) / YAN SHUANGZHI (author) / GENG KEMING (author) / DU YIHAO (author) / CAI BINLI (author)
2015-04-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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