铝塑复合包装材料废弃物分选技术

目的 针对铝塑复合包装材料废弃物分离不够彻底,导致产品纯度不高、分离效率低、分离工艺不够完善等问题,采用绿色环保的铝塑活性介质进行铝塑分选技术研究,优化分离工艺参数.方法 选择天然固体酸柠檬酸溶液作为铝塑复合废料分选的分离溶剂,研究柠檬酸浓度、反应温度、液固比、搅拌速度和裁切尺寸等因素对铝塑复合材料分离效果的影响.并根据正交试验和极差分析优化出分离时间短、铝损失率较低的分离工艺.结果 在柠檬酸浓度为2 mol/L,温度为100℃,液固比为400 L/kg,搅拌速度为650 r/min,裁切尺寸为0.5 cm×0.5 cm的条件下,铝塑分离率达到100％,分离时间为65 min,铝的质量损失率为0.66％.结论 柠檬酸作为一种新型天然分离剂,对铝的腐蚀率低,此技术为铝塑复合材料废弃物回收再利用工业化生产提供了参考.

Separation Technology of Waste Aluminum-Plastic Composite Packaging Materials

In order to analyze cushioning characteristics of the circular honeycomb, this paper conducted an in-depth study on its out-of-plane impact performance. Considering the limitations of the experimental methods, the finite element simulation is used to study the influences of cell wall thickness and impact velocity on the out-of-plane impact performance of the circular honeycombs with two arrangement modes(regular and staggered). And Ansys/LS-DYNA is employed. The comparison of the calculated results from the finite element models based on the array of cells and the representative cell with the theoretical values shows consistent agreement, which proves the reliability of the finite element models. The data analysis shows that the out-of-plane average peak stresses of the circular honeycombs increase with the increase of impact velocity or cell wall thickness. At a given impact velocity, the out-of-plane specific energy absorption capacity of circular honeycomb is related to the cell wall thickness and cell arrangement mode. Under the condition that the configuration parameters are fixed, the out-of-plane specific energy absorption capacity of staggered circular honeycombs is greater than that of the regularly arranged circular honeycombs; as the cell wall thickness increases, the out-of-plane energy absorption capacity of circular honeycombs gradually increases.