基于原子经济性的固废综合利用思想，将利用固废生产高附加值产品这种“变废为宝”的产业应用概念引入本科生实验教学中，基于磷尾矿酸解综合实验进行改进，设计开展了磷尾矿酸解及产品晶化综合实验。该综合实验包括尾矿选择性酸浸取分解、分离结晶、晶体取向生长等主要化工过程，并借助扫描电子显微镜研究材料晶须长径比等微纳结构以及分析元素组成等内容，锻炼学生的动手能力和实验设备操作、分析能力，了解大精仪器的操作原理及结果分析方法，实现本科−研究生阶段的衔接。同时，强化本科生的科研创新意识，丰富实验教学理论知识体系，融入课程思政元素，从而达到综合实验的教学目的。

Based on the scientific research concept of atomic economy and comprehensive utilization of solid waste, the production of high value-added products by “turning waste into treasure” based on the solid waste is introduced into the undergraduate’s experiment. Based on the comprehensive experiment of acidolysis of phosphorus tailings, the experiment of acidolysis and product crystallization of phosphorus tailings is designed. The comprehensive experiment includes chemical engineering process of selective tailings acid leaching decomposition, filtration and crystallization, and oriented crystal growth. Moreover, with the aid of scanning electron microscope (SEM), the micro-structure and length/diameter ratio of the whisker and the elemental content analysis are also determined. These contents can train the practical ability, experimental equipment operation skill and analytical ability of the undergraduates, and learn about the operation principle of the instruments and results analysis method, thus realizing the connection between undergraduate and postgraduate stages. Based on the experimental design, the scientific research innovation consciousness and the theoretical knowledge system of the students are highly improved, and the ideological and political theories are integrated in the teaching process, which achieve the teaching aims of comprehensive experiment.