The work took residue of Fushun east open-pit oil shale as raw material and investigated the leaching process conditions and preparation process condition of Al2O3. The acid leaching optimum technological conditions under single-factor research are as follows: the activation temperature is 850°C , the activation time is 1h, the granularity of raw material is 0. 074mm, the concentration of acid is 12%, the liquid-solid ratio is 5 :1, the reaction temperature is 100℃, the reaction period is 1. 5h. Homogeneous chemical precipitation method is applied to the alumina preparation. Optimum technological conditions of alumina preparation are determined by single-factor research method. The result is as follows: the reaction goes at 55℃ for 1. 5h, the concentration of sodium meta aluminate is 0. 4mol/L, the dose of surfactant is 0. 3 % of total system quality.%以抚顺东露天油页岩制油残渣为原料,用酸提法制备氧化铝,采用单因素考察法确定了抚顺东露天油页岩残渣提取氧化铝的酸溶反应最佳工艺条件为:煅烧温度850℃,煅烧时间1h,所需原料粒度0.074mm,盐酸浓度为12％,液固比为5∶1,酸溶反应温度100℃,反应时间1.5h,各项工艺指标在最佳工艺条件下,Al2O3浸出率为81.75％;采用均相化学沉淀法由酸溶反应得到的氯化铝滤液制备氧化铝的最佳工艺条件为:反应温度55℃,偏铝酸钠浓度0.4mol/L,乙酸乙酯与铝离子物质的量之比为1.7∶1,反应时间1.5h,表面活性剂的用量为总体系质量的0.3％.采用激光粒度分布仪、X射线衍射仪、X射线荧光光谱仪对所制得的产物氧化铝进行了表征和分析研究.
展开▼
