【作者】 宋静； 齐涛； 曲景奎；

【Author】 Song Jing,Qi Tao,Qu Jingkui(National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)

【机构】 湿法冶金清洁生产技术国家工程实验室,中国科学院过程工程研究所；

【摘要】 简单介绍了OLI StreamAnalyzer相平衡模拟软件,并采用该软件对液相氧化铬铁矿生产铬盐清洁工艺中涉及的关键体系K₂CrO₄-KOH-H₂O进行相平衡计算,并根据相平衡数据,绘制了该三元体系相图,确定了KOH溶液中分离K₂CrO₄的最佳条件;考察了溶液中杂质K₂CO₃、KAlO₂及K₂SiO₃的存在对K₂CrO₄分离的影响,为K₂CrO₄的分离提供理论依据。计算结果表明,KOH浓度在一定范围内时,溶液中的K₂CrO₄可从溶液中盐析结晶出来,K₂CO₃、KAlO₂及K₂SiO₃的存在有利于K₂CrO₄的盐析结晶,K₂CO₃对K₂CrO₄溶解度的影响最大。更多还原

【Abstract】 The OLI phase equilibrium simulation software is introduced and the K₂CrO₄-KOH-H₂O phase equilibrium data were calculated using OLI,which is the key system in the chromium salts cleaner production process,the phase diagram were plotted and the optimum operation condition were determined. The effect of existing of K₂CO₃、KA1O₂ and K₂SiO₃ to the solubility of K₂CrO₄ were studied,which can provide a basis for the separation of K₂CrO₄.The results showed that K₂CrO₄ can precipitate from the solution,when the concentration in a certain range,the existing of K₂CO₃,KAlO₂ and K₂SiO₃ were beneficial for the crystallization of K₂CrO₄,the effect of K₂CO₃ was the most.更多还原