微波加热配碳还原分解铁酸锌的工艺及机理研究  

Carbothermic Process and Mechanism Study on Zinc Ferrite Decomposition with Microwave

作　　者：王欣[1,2,3] 杨大锦[4] 彭金辉[1,2,3] 巨少华[1,2,3] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]非常规冶金教育部重点实验室,昆明650093 [3]微波能工程应用及装备技术国家地方联合工程实验室,昆明650093 [4]昆明冶金研究院,昆明650093

出　　处：《有色金属（冶炼部分）》2013年第5期1-4,9,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51104073);云南省中青年学术技术带头人后备人才项目(2012HB008)

摘　　要：研究了利用微波配碳还原焙烧分解铁酸锌的工艺及机理。利用碳气化控制、化学控制及扩散控制模型研究了样品中铁酸锌分解的动力学行为,并考察了微波功率、反应温度、配碳比和粒度对铁酸锌分解率的影响。结果表明,样品的微波加热碳热还原试验的控制步骤为碳气化控制,活化能为39.21kJ/mol,在微波加热温度850℃、C/ZnFe2O4质量比为1∶4、粒径74～89μm、微波功率1.8kW、加热时间60min的条件下,铁酸锌的分解率达到90%。The process and mechanism of carbothermic reduction with microwave of ZnFe2 O4 were studied. The decomposition kinetics of ZnFe2 O4 was carried out with models of carbon gasification, interracial area of mass transfer, and diffusion control. The effects of microwave power, reaction temperature, ratio of C/ZnFe2O4, and particle size on decomposition rate of ZnFe2O4 were investigated. The results show that the controlling model of decomposition of ZnFe2O4 is carbon gasification control with the kinetics of ln（1-3a） kt and activation energy of 39.21 kJ/mol. The decomposition rate of ZnFe204 is up to 90% under the conditions including microwave heating temperature of 850 ℃, mass ratio of C/ZnFe2O4 of 1/4, particle size of 74-89 μm, microwave power of 1.8 kW, and reaction time of 60 min.

关 键 词：动力学 铁酸锌 活化能 微波 机理 

分 类 号：TF813[冶金工程—有色金属冶金]