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

曹吉林; 佟建华; 林源; 吕秉玲

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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

化工学报 | 更新时间：2025-12-16

- 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
- PROCESSING OF ASCHARITE-MAGNETITE SYNGENETIC MINERAL BY SULFURIC ACID(Ⅲ)──PHASE DIAGRAMS OF H_3BO_3-MgSO_4-Mg(NO_3)_2-H_2O SYSTEM AT 25℃ AND 100℃ AND THEIR APPLICATIONS
- 化工学报 1998年第1期
- 作者机构：
  
  大连理工大学化工学院!大连l16012,大连理工大学化工学院!大连l16012,大连理工大学化工学院!大连l16012,大连理工大学化工学院!大连l,16012
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： F52
- 网络首发：1998-02-25，
  
  纸质出版：1998-02-25
- 稿件说明：
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曹吉林, 佟建华, 林源, 等. 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[J]. 化工学报, 1998,(1).

Cao Jilin, Tong Jianhua, Lin Yuan, et al. PROCESSING OF ASCHARITE-MAGNETITE SYNGENETIC MINERAL BY SULFURIC ACID(Ⅲ)──PHASE DIAGRAMS OF H_3BO_3-MgSO_4-Mg(NO_3)_2-H_2O SYSTEM AT 25℃ AND 100℃ AND THEIR APPLICATIONS[J]. CIESC Journal, 1998, (1).
曹吉林, 佟建华, 林源, 等. 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[J]. 化工学报, 1998,(1). DOI：

Cao Jilin, Tong Jianhua, Lin Yuan, et al. PROCESSING OF ASCHARITE-MAGNETITE SYNGENETIC MINERAL BY SULFURIC ACID(Ⅲ)──PHASE DIAGRAMS OF H_3BO_3-MgSO_4-Mg(NO_3)_2-H_2O SYSTEM AT 25℃ AND 100℃ AND THEIR APPLICATIONS[J]. CIESC Journal, 1998, (1). DOI：

摘要

Abstract

In order to establish the theortetical basis and optimize the production conditions for the separation process of the H_3BO_3-MgSO_4 mixed solution by using Mg(NO_3)_2 as the salting out agent.The phase diagrams of H_3BO_3─MgSO_4─Mg(NO_3)_2─H_2O system at 25℃ and 100℃ were studied.The results show that there appear MgSO_4·7H_2O

MgSO_4·6H_2O

Mg(NO_3)_2·6H_2O and H_3BO_3 three crystallization regions in the phase diagram at 25℃

and three crystallization regions of MgSO_4·H_2O

Mg(NO_3)_2·2H_2O

and H_3BO_3 at l00℃.When the temperatures rise from 25℃ to 100℃

the crystallization regions for magnesium sulfate hydlates grow larger and while that of H_3BO_3 get smaller.Only MgSO_4·4H_2O could be crystallized out alone

if evaporating the H_3BO_3─MgSO_4 solution in the presence of Mg(NO_3）_2.On cooling the MgSO_4 mother liquor

H_3BO_3 can be separated alone without any addition of water.

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