摘要
针对新疆硝酸盐矿开发过程中涉及到的水盐体系Na+//Cl-,SO42-,NO3--H2O,研究了具有不同浓度特征的硝酸盐水盐体系在自然降温过程中液相组成及结晶规律的变化。研究表明:随着温度的降低,十水硫酸钠的结晶区扩大,复盐Na2SO4·NaNO3·H2O和硫酸钠的结晶区缩小至消失,氯化钠、硝酸钠的结晶区变化不大;常温下处于不同盐类饱和状态下的溶液,降温过程中将出现不同的结晶路线;对于氯化钠、硝酸钠和Na2SO4·NaNO3·H2O三盐共饱的卤水,随着温度的降低,三盐始终饱和并析出,但液相组成变化由3种盐的结晶速率共同决定。
Abstract ：The study on the change of liquid composition and crystallization regularity has been carried out for the Na＋//Cl-, SO4 2-, NO3--H2O system with different concentration characteristics in natural cooling process ,which was involved in development of nitrate mine in Xinjiang, China.Results showed that, as the temperature decreased, crystallization field of Na2SO4· 10H2O expanded but ones of Na2SO4· NANO3· H2O and Na2SO4 became small, and disappeared, and ones of NaCl and NANO3 changed a little.Crystallization pathways of solution saturated with different salts were different in cooling process. For the hrine saturated with NaCl, NANO3, and Na2SO4· NaNO3-H2O, as the temperature decreased, three salts were always saturated and precipitated, however, the liquid composition was determined by the crystallization rate of three salts.
出处
《无机盐工业》
CAS
北大核心
2014年第4期18-21,共4页
Inorganic Chemicals Industry
基金
国家自然科学基金资助项目(21166022)
新疆大学创新团队(培育)资助项目
关键词
硝酸盐
低温
结晶
相图
nitrate
low temperature
crystallization
phase diagram
