改进的合成复体法绘制三元系等温截面图

Based on the method of compound synthesis, a new method of constructing the isothermal section phase diagram of tcrnary system is presented and the ternary C6H14O6-KCl-H2O system is taken as an example. By determinating the optical rotation of the saturated solution in the equilibrium system, the contents of the other components can be calculated, and then the isothermal section diagram of the ternary system can be constructed. The results shows that the common saturation point is as=58.5%, bs=17.4%,cs=24.1%. The general application of the method is discussed also in this paper.

铁矿石烧结过程SiO_2对黏结相流动性的影响

在实验室中采用测量熔渣在Fe-Ni合金垫片上投影面积的方法考察SiO_2含量对烧结黏结相流动性的影响,用光学显微镜和SEM对烧结后试样的微观结构进行观测,并且应用CaO-Fe_2O_3-SiO_2体系1 300℃等温截面图分析SiO_2含量与黏结相流动性和微观结构的关系。在黏结相成分为CaO含量10%、15%和20%,SiO_2含量2%和6%,试验温度为1 250、1 300和1 350℃,快速冷却的条件下的试验结果表明:(1)烧结黏结相流动性随SiO_2含量提高而降低。总体而言黏结相流动性随烧结温度提高而增加,但CaO处于10%的较低水平时,提高烧结温度对增加流动性的影响效果比较有限。(2)黏结相SiO_2含量增加,微观结构中赤铁矿比例提高。(3)通过等温截面图分析可知,体系SiO_2含量增加,黏结相固相比例增加、液相比例减少,同时液相中SiO_2提高幅度较体系中SiO_2提高幅度更为明显,在以上两方面因素共同影响下烧结黏结相流动性降低。