论文部分内容阅读
对Cu-Fe-Zn-S系统中心部分相平衡的研究是用抽空的硅玻璃管法。其相关系,包括黄铜矿、中间固溶体(iss)、斑铜矿、磁黄铁矿以及闪锌矿,是在800—500℃间确定的。还澄清了每个固溶体的组成范围。黄铜矿在实验中仅在500℃时出现接近化学计算为CuFeS_2的十分有限的固溶体场,并且仅溶解了少量小于0.9原子%的锌。然而中间固溶体具有广泛的固溶体场,它可以溶解相当大量的锌,从800℃时溶解12.7原子%到500℃时溶解3.3原子%。在各种温度下都可观察到锌的最大溶解度在富铁中间固溶体中比在方黄铜矿成分中大。同时,闪锌矿固溶体也溶解有相当数量的铜。在600℃以上时,闪锌矿中CuS含量随FeS含量增加而增加。当闪锌矿中含FeS大于40摩尔%时,可观察到CuS最大含量在800℃时为10.7摩尔%,700℃时为8.6摩尔%,在600℃时为4.6摩尔%。因此,铜进入闪锌矿取决于温度和硫逸度两方面。
The study of phase equilibrium in the central part of the Cu-Fe-Zn-S system uses an evacuated silicon-glass tube method. The correlations, including chalcopyrite, intermediate iss, behenite, pyrrhotite and sphalerite, are determined between 800-500 ° C. The composition range of each solid solution is also clarified. Chalcopyrite only exhibits a very limited solid solution field close to stoichiometry of CuFeS 2 at 500 ° C in the experiment and only a small amount of less than 0.9 atom% of zinc is dissolved. However, the intermediate solid solution has a wide range of solid solution fields and can dissolve a considerable amount of zinc, dissolving 3.3 atomic% from 12.7 atomic% at 800 ° C to 500 ° C. The maximum solubility of zinc is observed at various temperatures in the iron-rich intermediate solid solution than in the chalcopyrite component. At the same time, sphalerite solid solution also dissolves a considerable amount of copper. Above 600 ℃, the content of CuS in sphalerite increased with the increase of FeS content. When the sphalerite contains more than 40 mol% of FeS, it can be observed that the maximum content of CuS is 10.7 mol% at 800C, 8.6 mol% at 700C and 4.6 mol% at 600C. Therefore, copper entering sphalerite depends on both temperature and sulfurflux.