气浮法分离废旧涤棉混合纤维的关键技术  

Key technology of air floatation separation of waste polyester cotton mixed fiber

作　　者：蔡宇凌 苏健梅 段先月 孙秀敏[1] 时钟 姜涛[1] CAI Yuling;SU Jianmei;DUAN Xianyue;SUN Xiumin;SHI Zhong;JIANG Tao(Center for Environment and Green Development,China Electronic Product Reliability and Environmental Testing Research Institute,Guangzhou 511300,China)

机构地区：[1]工业和信息化部电子第五研究所环境与绿色发展中心,广东广州511300

出　　处：《印染》2024年第12期59-61,65,共4页China Dyeing and Finishing

基　　金：广州市科技计划项目(202201011745)。

摘　　要：研究了“重力浮选+多级气浮”物理法在分离废旧涤棉混合纤维中的应用。在250mL 30%氯化钙溶液中,加入0.375g涤棉混合纤维,利用涤棉纤维与溶液的密度差,结合甲基异丁基甲醇(MIBC)起泡剂产生的气泡,可以实现一定的涤棉分离效果。结果表明,“重力浮选+多级气浮”的分离方法可以逐级分离出更多的棉纤维,四级气浮后底层样品的棉纤维占比可达到90.1%,但分离效果随分离级数的增加而减弱,其中二级气浮的单次分离效果最佳。The application of physical method of"gravity flotation+multistage air flotation"for separating waste polyester cotton mixed fibers is studied.Certain polyester-cotton separation effect can be achieved under the optimal conditions of 30% calcium chloride solution of 250 mL and 0.375 g polyester cotton mixed fiber,utilizing the density difference between polyester cotton fibers and the solution,combined with the bubbles generated by the MIBC foaming agent.The result demonstrates that the method of"gravity flotation+multistage air flotation"can separate more cotton fibers,and the proportion of cotton fibers in the bottom after the fourth air flotation can reach 90.1%.However,the separation effect weakens with the increase of separation stages,among which the single separation effect of the second-stage air flotation is the best.

关 键 词：重力浮选 多级气浮 废纺 涤棉分离 物理法 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]