| Title | The Effects of B2O3 Content on the Properties of Alumina-magnesia Dry Ramming Materials |
| Thematic area | Other Industries |
| Presenter | Prof. Hongxi Zhu |
| Authors | Mr. Yunfei Song, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan - China Prof. Hongxi Zhu, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan - China Prof. Chengji Deng, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan - China Mr. Shuangshuang Ding, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan - China |
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Abstract
The paper explored the effect of appropriate number of B2O3 on the properties of alumina-magnesia dry ramming materials through analysis of its phases, morphology of the samples fired at a high temperature with different amounts of B2O3. Different sizes of corundum, α-Al2O3 powder and fused magnesia were used as raw materials, boron oxide as binding agent and a hand-ramming molding method to keep its shape. The test results of the samples fired at 1600 ℃ for 3h showed that the most appropriate amount of B2O3 addition was 1.5wt%, at this condition, the Al2O3 and MgO reacted with each other to generate a great amount of aluminum-magnesium spinel with the size ranging from 3μm to 15μm. Some of the alumina-magnesia spinel were closely combined together for sintering and crystallization, and the ones of small size showed a more regular shape. |
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