真空蒸馏分离脆硫铅锑精矿中闪锌矿的实验研究

发布时间：2018-09-15 07:10

【摘要】：提出了一种利用真空蒸馏从脆硫铅锑精矿中分离闪锌矿的方法,从理论上分析了闪锌矿与脆硫铅锑精矿分离的可行性并开展了实验研究。理论计算结果表明,Sb_2S_3,PbS,ZnS和FeS在实验温度范围内挥发性依次减弱且不会分解。对实验样品采取化学分析及X射线衍射和能量色散谱物相分析,探究蒸馏温度和保温时间对闪锌矿分离富集效果的影响,分析结果表明,通过真空蒸馏脆硫铅锑精矿的方法可以实现闪锌矿与其他硫化物的分离和富集,在温度为1073~1573 K,随着蒸馏温度和保温时间的增加,锌的富集比出现先增加后稳定的趋势,蒸馏温度的对闪锌矿分离的影响大于保温时间。当保温时间为1.0 h,蒸馏温度为1473 K,系统压力为50 Pa时,锌以闪锌矿形式存在于冷凝盘中,锌含量高达66.32%,接近于纯硫化锌中锌的含量66.67%。该方法为脆硫铅锑矿的冶炼提供的新方法,同时为含有闪锌矿的其他矿物提取闪锌矿提供了新思路。
[Abstract]:A method of separating sphalerite from brittle-lead-antimony concentrate by vacuum distillation was proposed. The feasibility of separating sphalerite from brittle-lead-antimony concentrate was analyzed theoretically and the experimental study was carried out. The theoretical calculation results show that the volatility of Sb2S and FeS decreases in turn and does not decompose in the experimental temperature range. Chemical analysis, X-ray diffraction and energy dispersive spectrum phase analysis were used to investigate the effects of distillation temperature and holding time on the separation and enrichment of sphalerite. The separation and enrichment of sphalerite from other sulfides can be realized by vacuum distillation of brittle lead and antimony concentrate. With the increase of distillation temperature and holding time, the zinc enrichment ratio increases first and then stabilizes. The effect of distillation temperature on sphalerite separation is greater than that of holding time. When the holding time is 1.0 h, the distillation temperature is 1473 K and the system pressure is 50 Pa, zinc exists in the condensed disk in the form of sphalerite, and the zinc content is as high as 66.32, which is close to the zinc content in pure zinc sulfide. This method provides a new method for smelting brittle-sulfur lead antimony ore and a new idea for extracting sphalerite from other minerals containing sphalerite.
【作者单位】：省部共建复杂有色金属资源清洁利用国重点实验室;昆明理工大学真空冶金国家工程实验室;云南省有色金属真空冶金重点实验室;
【基金】：国家自然科学基金项目(51304096和U1202271) 云南省应用基础研究自筹经费项目(2013FZ028) 教育部“创新团队发展计划”(IRT1250) 云南省开放课题基金项目(CNMRCUKF1403) 云南省科技领军人才-有色金属真空治金(2014HA003)
【分类号】：TD95

【相似文献】