摘要
采用等温溶解平衡法研究了在KNO_3质量浓度稳定在(22±2)g/L,即K_2O质量浓度为(10.24±1.00)g/L时,ZnSO_4-CuSO_4-H_2O水盐体系相平衡关系。利用直角坐标系绘制了0,10和20℃下的水盐体系相图,其中横坐标轴、相平衡曲线和直线c(Zn~(2+))+c(Cu~(2+))=100 g/L所围成的区域即为含定量KNO_3的Zn-Cu水溶肥料配方区。试验结果表明,根据配方区所制备的水溶肥料具有良好的储存性能。
By isothermal dissolution equilibrium method, the study of phase equilibrium relationship of ZnSO_4-CuSO_4-H_2O salt-water system is carried out on condition that mass concentration of KNO_3 stabilizes at( 22 ± 2) g/L,that is,mass concentration of K_2 O is( 10. 24 ± 1. 00) g/L. The phase diagrams of the salt-water system at 0 ℃,10 ℃ and 20 ℃ are drawn by Cartesian coordinate system. The area surrounded by the axis of abscissa,phase equilibrium curve and c( Zn~(2+)) +c( Cu~(2+)) = 100 g/L straight line is the formula area of Zn-Cu water soluble fertilizers which contain quantitative KNO_3. Experiment results show that water soluble fertilizers prepared according to the formula area have good storage performance.
引文
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