Bi -NO₃^-- H₂O系热力学平衡研究

来源期刊：中南大学学报(自然科学版)1999年第5期

论文作者：秦毅红 王云燕

文章页码：497 - 500

关键词：Bi -NO₃^-- H₂O体系;热力学;Bi₂O₃;平衡

Key words：Bi -NO₃^-- H₂O system; thermodynamic; Bi₂O₃; equilibrium

摘    要：运用同时平衡和质量平衡原理首次对Bi -NO₃^-- H₂O体系进行了详细的热力学分析和计算，在此基础上绘制了25 ℃时Bi -NO₃^-- H₂O系中各种沉淀物与溶液平衡的浓度对数－pH 图，确定了各种沉淀物稳定存在的pH值范围．结果表明：溶液中铋离子和硝酸根离子的浓度及溶液的pH 值是影响各固相稳定存在的重要参数，为铋的湿法冶金过程和化工产品的湿法生产过程提供了重要的理论依据

Abstract: The concentration equilibrium principle and mass equilibrium principle were, for the first time, applied to thermodynamic analysis and calculation of the system of Bi -NO₃^-- H₂O, on which the logarithmic diagrams of equilibrium concentration of series precipitation at 25 ℃ and pH of the system of Bi -NO₃^-- H₂O were drawn, and the stable existing region was studied. The results show that c⁰_Bi³⁺ , c⁰_NO³⁺ and pH are the important factors to the stabilization zone of each solid, which provides an important theory basis for the process of the hydrometallurgy and the hydrometallurgical production of chemical products of metal bismuth.