铅精矿吸湿平衡数学模型研究

Study on Moisture Adsorption Equilibrium Model of Lead Concentrate

摘要: 为了探究并建立更加适用于铅精矿贮存运输过程中的吸湿平衡模型，本文基于铅精矿物料在不同温度、相对湿度和粒径条件下进行的吸附空气中水分实验，结合相关性分析探讨了温湿度、粒径条件对平衡吸湿量的影响，结果表明温度和相对湿度与平衡吸湿量的相关度分别达到−0.927和0.932，为决定性因素。进而基于Langmuir等温吸湿模型，引入温度变量，通过理论推导与经验分析两种途径，分别提出了受温度、湿度共同影响的两种修正Langmuir模型。结合两种模型对实验数据的拟合分析与比较，表明在温度为20℃~80℃和相对湿度为45%~95%的实验条件下，基于经验法修正后的Langmuir吸湿平衡模型可以更为准确地描述铅精矿物料吸湿性能，可以在一定程度上计算生产过程中铅精矿物料的平衡吸湿量。

Abstract: In order to build a more applicative moisture adsorption equilibrium model of lead concentrate, the partial correlation analysis of different factors to moisture adsorption content is conducted basing on the previous experimental works. It shows that the temperature and relative humidity, the correlations are −0.927 and 0.932 respectively, are decisive factors. And then, based on the original Langmuir equilibrium adsorption model, two modified Langmuir models are built by theoretical and empirical methods, which are controlled by the temperature and relative humidity. The analysis and comparison of two models shows that the empirical modified Langmuir equilibrium model is more applicative to the lead concentrates under the 20˚C - 80˚C of temperature and 45% - 95% of RH. So, the empirical modified Langmuir equilibrium model can be employed to calculate the moisture adsorption content of lead concentrates in the industry to some extent.