硼矿石中镁资源的综合利用研究  

Study on Comprehensive Utilization of Magnesium Resources in Minerals Containing Boron

作　　者：张丽清[1] 刘素兰[2] 朱建新[2] 于洋[2] 

机构地区：[1]沈阳化工学院,辽宁沈阳110021 [2]东北大学,辽宁沈阳110006

出　　处：《矿产综合利用》1999年第5期12-14,共3页Multipurpose Utilization of Mineral Resources

基　　金：辽宁省科学技术基金

摘　　要：采用高温结晶法处理硼矿石硫酸法制硼酸后的母液，进行硫酸镁和硼酸的分离。结晶实验在ＦＸＹ－０．５Ａ 高压釜中进行。在１８０℃温度下，ＭｇＳＯ４－Ｈ３ＢＯ３－Ｈ２Ｏ 体系结晶生成固相ＭｇＳＯ４·Ｈ２Ｏ。研究了硫酸镁浓度、硼酸浓度、结晶时间对ＭｇＳＯ４·Ｈ２Ｏ 结晶产率的影响，最后确定母液中ＭｇＳＯ４ 结晶生成固相ＭｇＳＯ４·Ｈ２Ｏ 的最佳工艺条件为：溶液中硫酸镁的浓度为２５％ —２８％ ，硼酸的浓度小于４％ ，结晶时间４ｈ，结晶温度１８０℃，一水硫酸镁产率为５７．６％ 。In this paper,the boric acid and magnesium sulfate in matrix solution after mineral containing boron were leached by sulfuric acid to produce boric acid were separated by means of high temperature crystallizing.The experiments were carried out in FXY 0.5A autoclave.At 180℃,the kieserite were crystallized from system of MgSO 4 H 3BO 3 H 2O.The effect of concentration of MgSO 4,concentration of H 3BO 3 and duration of constant temperature on productivity of kieserite was studied.According experimental results and industrial magnification consideration,the optimum conditions were determined ,which are keeping the concentration of magnesium sulfate in the range of 25%_28%,the concentration of boric acid less than 4%,crystallizing temperature at 180℃,and the duration at constant temperature for 4h,yield of kieserite was 57.6%.

关 键 词：一水硫酸镁 分离 硼矿石 综合利用 镁资源 

分 类 号：TD971.1[矿业工程—选矿] TD982