碳机械活化对ZnO和Fe_xO_y直接还原的影响  

Influence of Carbon Mechanical Activation on the ZnO and Fe_xO_y Direct Reduction

作　　者：蒋武锋[1] 赵朔 郝素菊 张玉柱 

机构地区：[1]华北理工大学冶金与能源学院现代冶金技术教育部重点实验室,河北唐山063009

出　　处：《过程工程学报》2017年第2期362-366,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51174075;51274084);河北省自然科学基金资助项目(编号:E2014209157)

摘　　要：通过计算反应吉布斯自由能研究机械活化后的碳对氧化锌和氧化铁开始还原温度的影响,对碳热还原反应进行了热力学分析.结果表明,具有机械储能的碳不仅会使氧化铁和氧化锌开始还原的温度显著降低,还进一步改善了碳粉的还原能力,达到了节能降耗的目的.机械活化后的碳使氧化锌开始还原的温度降低了185℃,赤铁矿开始还原的温度降低了105℃,主要原因是碳在机械活化过程中产生了晶格畸变能和表面能,其中又以晶格畸变引起的位错能和无定型化能为主要储能来源.In order to study the influence of mechanical activation on zinc oxide and iron oxide reduction start temperature, the thermodynamics of carbon thermal reduction reaction was analyzed and the reaction Gibbs free energy was calculated. The results showed that the mechanical energy storage of carbon will not only make the beginning temperature of ferric oxide and zinc oxide reduction decreased significantly, and improve the ability of powdered carbon reduction, has reached the requirement of saving energy and reducing consumption. The beginning temperature of the zinc oxide reduction reduced about 185 ℃, the beginning temperature of the hematite reduction decreased around 105 ℃, the main reason was carbon lattice distortion energy and surface energy in the process of mechanical activation, which can to lattice distortion caused by the dislocation and no standard for the major source of energy storage.

关 键 词：机械活化 热力学分析 吉布斯自由能 机械储能 还原温度 

分 类 号：TF111.13[冶金工程—冶金物理化学]