硫酸盐型卤水蒸发过程钾盐镁矾结晶区域研究  

Crystallizing region of kainite in sulfate-type brine evaporation process

作　　者：安东[1,2] 张志宏[1] 付振海[1] 王婧[1] 赵冬梅[1] 胡天琦 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学

出　　处：《无机盐工业》2015年第8期49-52,共4页Inorganic Chemicals Industry

摘　　要：采用等温蒸发结晶、分步分离的方法,参考25、35℃下Na+,K+,Mg2+∥Cl-,SO42--H2O五元水盐体系介稳溶解度相图,研究了不同组成硫酸盐型卤水27℃等温蒸发实验。通过对卤水蒸发过程中液固相的化学分析和物相分析,得到了不同组成卤水蒸发析出钾盐镁矾的结晶路线,以及各种组成卤水的成盐类型和析盐规律。探讨了27℃该五元水盐体系部分相区较35℃时发生的变化,绘制出27℃下Na+,K+,Mg2+∥Cl-,SO42--H2O五元水盐体系中钾盐镁矾的结晶区域。Different composition isothermal evaporation experiments of sulfate-type brine at 27℃ were conducted through isothermal evaporation crystallization and fractional separation, according to the mesostable equilibriums of Na^＋, K^＋, Mg^2＋// Cl^-, SO4^2--H2O system at 25℃ and 35 ℃.The crystallization routes the brines with different compositions, as well as the salt types and salting-out laws of each brine were determined by the chemical and phase analysis on liquid and solid phases in the evaporation process.The partial phase region changes of the five-membered salt system were compared at 27℃ and 35℃, and the crystalline regions of kainite was depicted in Na^＋, K^＋, Mg^2＋//Cl^-, SO4^2-H2O system at 27 ℃.

关 键 词：钾盐镁矾 等温蒸发 硫酸盐型卤水 

分 类 号：TQ125.14[化学工程—无机化工]