含锌粉尘团块脱锌行为研究-中南大学学报.PDF

第 48 卷第 7 期 中南大学学报( 自然科学版) Vol.48 No.7 2017 年 7 月 Journal of Central South University (Science and Technology) July 2017 DOI: 10.11817/j.issn.1672-7207.2017.07.003 含锌粉尘团块脱锌行为研究 陈子罗，张建良，刘征建，袁骧，王飞，刘依然，高斌 (北京科技大学 冶金与生态工程学院，北京，100083) 摘要：通过正交实验分析焙烧温度、碳氧物质的量比、水分质量分数、碱度和 CO2 体积分数 5 个关键因素对含锌 粉尘的脱锌过程的影响，利用热力学软件 Factsage 计算分析实验温度范围内锌、铁的还原优势，并且通过扫描电 镜(SEM)和 X 线衍射分析(XRD)Zn 和 Fe 元素在焙烧过程中的还原行为。研究结果表明：温度是影响脱锌率最主 要的因素，脱锌率随着温度的升高而显著增加。达到 1 200 ℃时 Zn 单质几乎能和 Fe 单质同时被还原出来。脱锌 的最佳工艺参数如下：温度为 1 200 ℃，碳氧物质的量为 1.0，水分质量分数为 10%，碱度为2.0 ，CO2 体积分数 为 65%，在此最佳工艺条件下团块脱锌率达到 82.66%。 关键词：含锌粉尘；脱锌；正交实验；还原；热力学 中图分类号：TF556 文献标志码：A 文章编号：1672−7207(2017)07−1704−08 Research on dezincification of zinc-bearing dusts composite briquettes CHEN Ziluo, ZHANG Jianliang, LIU Zhengjian, YUAN Xiang, WANG Fei, LIU Yiran, GAO Bin (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China) Abstract: Based on the orthogonal experiment, the effects of roasting temperature, molar ratio of carbon to oxygen, mass fraction of water, binary basicity and CO2 volume fraction on the dezincification of zinc-bearing dusts briquettes were studied. The predominancearea of Zn and Fe were calculated by Factsage. The reduction behavior of Zn and Fe was analyzed by scanning electron microscope (SEM) and X-Ray Diffraction (XRD). The results show that roasting temperature is the most important factor of the dezincification, and the higher temperature, the higher dezincification rate. At 1 200 ℃