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利用铝型材厂碱蚀渣为主要原料,采用二步煅烧工艺制备铝方柱石材料。探索二次煅烧温度对铝型材厂碱蚀渣制备铝方柱石材料相组成、结晶度、微观结构的影响,进而研究氧化铬对铝方柱石材料相组成、微观结构的影响。采用同步热分析、X射线衍射、扫描电镜及相关分析软件表征制备的铝方柱石材料的相组成和显微结构。结果表明:铝型材厂碱蚀渣中有大量可烧失成分,物料需要进行致密化处理,再经过1500℃煅烧后的铝方柱石材料结构中具有明显的铝方柱石条柱状结构,结晶度增大,铝方柱石相对含量达到91%。随着氧化铬加入量增加,结构中的铝铬酸钙相增加。当氧化铬加入量为2%时,试样中结晶相的结晶度最高,形成条柱状铝方柱石相与立方状铝铬酸钙相共存的结构。当氧化铬加入量4%时,试样中铝方柱石相几乎消失,结晶度降低。
The use of aluminum plant alkaline corrosion as the main raw material, the use of two-step calcination process to prepare aluminum pillared stone material. The effect of secondary calcination temperature on the phase composition, crystallinity and microstructure of aluminum-containing pillared soda-lime-stone was investigated. The influence of chromium oxide on the phase composition and microstructure of the aluminum-pillared stone was also investigated. Simultaneous thermal analysis, X-ray diffraction, scanning electron microscopy and correlation analysis software were used to characterize the phase composition and microstructure of the prepared apatite materials. The results show that there is a large amount of calcined loss components in the aluminum alloy factory, and the material needs to be densified. After calcination at 1500 ℃, the aluminum pillar has a columnar columnar structure with an obvious increase of crystallinity Large, aluminum relative content of pillars reached 91%. As the amount of chromium oxide added, the structure of aluminum chromate phase increases. When the amount of chromium oxide is 2%, the crystallinity of the crystalline phase in the sample is the highest, forming a structure in which the bar-like aluminum-containing prismatic phase coexists with the cubic aluminum-chromic acid phase. When the amount of chromium oxide added 4%, the sample Al -phase column almost disappeared, crystallinity decreased.