基于超结构模型的铅阳极泥制备锑白工艺水网络优化

摘要

为降低铅阳极泥回收工艺过程中废水排放对环境的影响,以高锑低银类铅阳极泥湿法制备锑白为研究对象,构造针对过程盐酸减排的水网络超结构,提出带反应单元的杂质物料平衡模型,建立水网络求解非线性规划问题,并通过实验数据调和整定用水与处理单元特征参数,求解非线性规划问题并根据最优解进行了工业装置路线设计.将该方法应用于铅阳极泥制备锑白工艺设计时,可将废水中酸和有毒金属的排放浓度控制到给定值以下,优化后水的重复利用率可达到87.4％；采用基于超结构的非线性规划对此工艺过程进行优化,可以获得合理的水网络结构,达到减排效果.%The water network synthesis of Sb recovery from lead anode slime with high antimony and low silver content using chloridization-leaching was analyzed. A superstructure was firstly proposed for the water network synthesis, based on which, an non-linear program (NLP) model considering both the waste minimization and Sb recovery profit was developed. Besides the traditional mass balance, the chemical reactions were also included. The model parameters were determined based on experimental data of real process. The optimal results are obtained with an improvement of 87.4% reusable water. Discussions on the flowsheet with optimal structure were also presented.