基于物料加载的微波加热谐振腔谐振模式的研究

项目名称： 基于物料加载的微波加热谐振腔谐振模式的研究

项目编号： No.51304097

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 陈华

作者单位： 昆明理工大学

项目金额： 25万元

中文摘要： 作为一种新型绿色冶金方法，微波辐射技术在磨矿、湿法浸取、干燥、废物处理和矿石还原等冶金领域中具有广泛的应用前景。微波加热谐振腔的设计直接影响加热的效率，加热的均匀性以及微波源的利用率等。腔体中的谐振模式数是设计谐振腔体的重要参考指标之一，然而在加热中，随着加载物料的不同，腔体中的谐振模式会改变甚至消失，从而使腔体中的谐振频率和品质因数随之发生改变，最终导致对微波加热腔体的加热效率以及均匀性产生影响。本项目旨在：基于微波加热的优点和物料加热以后介电特性的变化，根据电磁理论推导编程，对物料加载时谐振腔内谐振模式数的和电场分布特性进行分析，建立温度场与物料介电特性以及谐振模式的数学模型。通过软件仿真及实验数据对比，总结物料加载下谐振模式数对腔体设计的影响。该项目可为实现微波冶金的低成本生产以及微波反应器的优化设计提供理论指导和技术原理，对完善微波与物质间相互作用理论，实现清洁生产具有重要的意义。

中文关键词： 微波加热；谐振腔；谐振模式；热均匀性；电磁敏感性

英文摘要： Microwave technology has a great application prospect in metallurgical area, such as preparing mineral, leaching, drying,dealing with waste,deoxidizing mineral and so on. Microwave heating reactor designing has a directly effect on the thermal efficiency, heating uniform and utilizing efficiency of microwave power.The resonance mode in cavity is one of the most improtant reference to the cavity design. However,the resonance mode could be changed or even disappeared in the process of heating, which will result in resonance frequencies changing and finally affecting on theraml efficiency. In this item, based on the strongpoints of microwave heating and permitivity properting,the resonance mode and electrical field in cavity on load will be analyzed according to the elctromagnetic theory. The mathematic model of temperature field with permitivity of the load and resonance mode will be built up. Compared with experiment data and simulation results,the relationship of resonance mode and cavity design will be summarized. This item can achieve low cost of microwave metallurgy and supply theory insutruction for microwave reactor design. The mutual action theory between microwave and material will be consummated. It is also significant for clear production.

英文关键词： microwave heating；resonance cavity；resonance mode；heating uniform；permitivity sensitivity