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在我国新疆罗布泊、吐鲁番等地区广泛分布含硝酸盐的盐湖、盐滩 ,近年来也发现一些小型的硝酸盐矿床 .根据罗布泊等地区已发现的盐类矿物组合分析 ,该地区盐湖的卤水 矿物平衡应属K+ ,Na+ /Cl- ,SO2 - 4,NO- 3 H2 O五元水盐体系 .本文用等温溶度法研究了该体系 2 5℃时的卤水 矿物平衡 ,得到 15个平衡点的数据 (其中有 4个是五元零变度点 ) ,绘制出等温相图 ,并对该相图的特征做了分析 .说明了在 9条相区界线中8条都是共结线 ,仅有一条是反应线 .该等温图中有两个共结点 ,也是H2 O值的最低点和卤水蒸发的必然干点 .
In our country, Lop Nur, Turpan and other regions are widely distributed in the salt lake, salt beach containing nitrate, also found some small nitrate deposits in recent years.According to the Lop Nur area and other areas have found that the mineral composition of the salt analysis, the salt lake brine mineral balance Should be K +, Na + / Cl-, SO2-4, NO3H2O five yuan water salt system.In this paper, the isothermal solubility method was used to study the brine mineral equilibrium at 25 ℃, and the data of 15 equilibrium points (Four of which are five-dimensional zero-scale point of variation), draw the isothermal phase diagram, and the characteristics of the phase diagram made an analysis shows that the nine phase boundaries in the eight are common lines, only One is the reaction line.There are two nodes in the isotherm, which is also the lowest point of the H2O value and the inevitable dry point of brine evaporation.