翁泉沟硼镁铁矿的硫酸法加工(Ⅲ)──25℃及100℃H_3BO_3-MgSO_4-Mg(NO_3)_2-H_2O体系相图及其应用

作     者：曹吉林 佟建华 林源 吕秉玲 

作者机构：大连理工大学化工学院大连l16012 

出 版 物：《化工学报》 (CIESC Journal)

年 卷 期：1998年第49卷第1期

页      面：97-102页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：硼镁铁矿 硫酸法 硝酸镁 盐析剂 硼酸 生产 

摘      要：In order to establish the theortetical basis and optimize the production conditions for the separation process of the H3BO3-MgSO4 mixed solution by using Mg（NO3）2 as the salting out *** phase diagrams of H3BO3─MgSO4─Mg（NO3）2─H2O system at 25℃ and 100℃ were *** results show that there appear MgSO4·7H2O,MgSO4·6H2O,Mg（NO3）2·6H2O and H3BO3 three crystallization regions in the phase diagram at 25℃,and three crystallization regions of MgSO4·H2O,Mg（NO3）2·2H2O,and H3BO3 at l00℃.When the temperatures rise from 25℃ to 100℃,the crystallization regions for magnesium sulfate hydlates grow larger and while that of H3BO3 get *** MgSO4·4H2O could be crystallized out alone,if evaporating the H3BO3─MgSO4 solution in the presence of Mg（NO3）*** cooling the MgSO4 mother liquor,H3BO3 can be separated alone without any addition of water.