氧化铝载体成型工艺条件研究

利用氧化铝载体的工业成型设备，考察了氧化铝载体成型过程中水粉比、捏合机频率以及物料温度等工艺条件对捏合、挤条操作及载体性质的影响。结果表明，各工艺条件对捏合过程均有不同程度的影响，捏合过程直接影响物料的性质，进而影响后续的挤条压力，最终影响载体性质。结合实际生产的需求，确定氧化铝载体成型的最佳工艺条件为：水粉比1.37~1.40，捏合机频率先调至35 Hz、待胶溶反应开始后降低至20 Hz，捏合机外部通入循环冷却水，挤出压力10~15 MPa。

STUDY ON EXTRUSION CONDITIONS FOR TRILOBULAR ALUMINA CARRIER

The influence of extrusion conditions such as water to powder ratio, extruder frequency and material temperature on kneading，extruding, and carrier properties were studied. The results show that the kneading process, carrier properties are directly affected by extrusion conditions. Based on actual production requirement, the optimum extrusion conditions are found as follows: water to powder mass ratio 1.37~1.40, extrusion pressure of 10~15 MPa, extruder frequency of 35 Hz and then 20 Hz at the point where the peptization starts with external circulating cooling water.