科研之友
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摘要
In order to find the replacement of chromium-free refractory in copper metallurgy, high density magnesium aluminate spinel material was prepared and the corrosion resistance mechanism of spinel material to copper smelting slag was investigated. The light burning magnesium powder and industrial alumina were prepared as the main raw materials. The influence of light burning temperature on the synthesis of active spinel was researched, and the sintering properties of the active spinel were characterized. The static crucible method was used to investigate the corrosion resistance mechanism of magnesium aluminum spinel to copper smelting slag. The results showed that the optimum light burning temperature of the synthesis of active spinel with small grain size and high sintering activity is 1 400 ℃. The compact spinel material is sintered at 1 750℃ for 3 h using active spinel, which has uniform grain size distribution of 7.26 μm, and bulk density of 3.29 g/cm3, and apparent porosity of 3.53%. The liquid phase and Mg(Fe2+)Al(Fe3+)2O4 spinel phase can be formed by the reaction of magnesium aluminate spinel with copper smelting slag. The densification degree of the material plays a key role in the resistance to slag penetration. Compared with the fused spinel raw material used in traditional industry, the synthesized active spinel shows higher sintering activity, which can improve the densification degree of the material and thus improve the resistance to slag penetration of the material. ? 2023 Central South University of Technology.
- 出版日期2023
- 单位武汉科技大学
