自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第32卷    第2期    总第138期    2001年4月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1005-9792(2001)02-0139-03
Bi(Ⅲ)-X(Cl-,NO-3)-H2O体系热力学平衡研究
王云燕,彭文杰,舒余德,秦毅红

(中南大学冶金科学与工程系,湖南长沙 410083)

摘 要: 为确定Bi(Ⅲ)-X(Cl-,NO-3)-H2O体系中各固相稳定存在的pH范围,运用同时平衡原理和质量平衡原理对Bi(Ⅲ)-X(Cl-,NO-3)-H2O体系进行了热力学分析和计算,在此基础上绘制了Bi(Ⅲ)-X(Cl-,NO-3)-H2O体系在25℃时的各种沉淀物的平衡浓度对数-pH图,确定了各种固相沉淀物稳定存在的pH值范围.结果表明:溶液中铋离子和氯离子(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.由热力学图可得出:可以直接从溶液中沉淀得到Bi2O3;要得到高纯度的BiOCl或BiONO3必须严格控制溶液的pH范围.这为铋的湿法冶金过程和化工产品的湿法生产过程提供了理论依据.

 

关键字: Bi(Ⅲ)-X(Cl-,NO-3)-H2O体系;热力学平衡; Bi2O3; BiOCl; BiONO3

Thermodynamic equilibrium study of Bi(Ⅲ)-X(Cl-,NO-3)-H2O system
WANGYun-yan,PENGWen-jie,SHUYu-de,QINYi-hong

Department of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:In order to identify the pH ranges of the stabilization zone of each solid in Bi(Ⅲ)-X(Cl-,NO-3)-H2Osystem, the concentration balance principle and mass balance principle were applied to the thermodynamic analysis and calculation of Bi(Ⅲ)-X(Cl-,NO-3)-H2O system, based on which the diagrams of the logarithm of equilibrium concentration of series precipitation at25℃pH of Bi(Ⅲ)-X(Cl-,NO-3)-H2Osystemwere drawn, and the stable existingregions were analyzed and studied. The results show that c0(Bi3+),c0 (Cl-),c0 (NO-3) and pH were the important factors to the stabilization zone of each solid. From thermodynamic diagrams it could be seen that Bi2O3can be obtained from the solution directly, and if we want to get highly purified BiOCl or BiONO3the pH ranges must be controlled strictly. Which provides an important theory basis for the process of the hydrometallurgy and hydrometallurgical production of chemical products of metal bismuth.

 

Key words: Bi(Ⅲ)-X(Cl-,NO-3)-H2O system; thermodynamics equilibrium; Bi2O3; BiOCl; BiONO3

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号