反应温度与时间对铝型材厂工业污泥合成堇青石材料的得率与晶相结构影响

本研究主要探讨反应温度和反应时间对铝型材厂工业污泥合成堇青石材料的得率和晶相结构的影响。该污泥系由铝型材表面处理时产生的大量废液, 经沉淀过滤所得。主要成分是一种超细的γ-AlOOH, 其中部分是晶体, 部分是无定形体, 活性很高, 有利于堇青石晶相的形成, 能降低反应温度。 实验结果表明: 堇青石含量随着反应温度升高而增加; 晶相结构和晶胞参数与反应温度有关; 确定1350℃为最佳的反应温度; 反应时间在 2~5 h的试样中,堇青石含量增加, 在5~6 h含量降低. 5 h为最佳的反应时间。

Influence of Sintering Time and Sintering Temperature on Crystalline Structure of Cordierite Synthesized from Waste Aluminum Sludge

The influence of sintering time and sintering temperature on the crystalline structure of cordierite synthesized from waste aluminum sludge was studied in this paper. The sludge was obtained from treating the surface of Al finishing plant. After dewatering its main component is -AlOOH which is the coexistence of both crystal and amorphous states. -AlOOH has high activity which can decrease the sintering temperature and help form cordierite. The results show that the amount of cordierite increases with the increase of sintering temperature, and consequently the crystalline and unit cell parameters are changed. The best sintering tem- perature and sintering time are determined to be 1350 ℃ and 5 h, respectively. Under such conditions, the amount of cordierite phase is the largest.