文档介绍：中南大学硕士学位论文摘要摘要机械化学过程中的能量学研究对机械活化处理矿物、机械合金化以及制备粉体和化合物均具有重要意义。本论文对自行研制的搅拌磨机械化学热量仪进行了标定和性能测试,并对黄铁矿以及两种氧化物(氧化锌和氧化铜)的机械活化储能进行了研究。 、稳定性测试、不同工作温度和工作介质的空白实验以及可靠性测试,结果表明该热量仪性能稳定,测量结果准确可靠,适宜于机械化学能量学在线测量的研究。机械搅拌释放热能随搅拌速度增大而增大,同一搅拌速度下热能与搅拌时间呈线性关系;搅拌速度越快则施加的热功率越大;相同条件下,干磨体系搅拌所施加的热功率大于湿磨体系;恒温温度的变化对湿磨体系影响较大,对干磨体系影响较小。 ,并对活化后的样品进行了激光粒度和X射线衍射分析。结果表明,研磨初期,黄铁矿在干磨条件下储能增加较快,而湿磨条件下储能增加则相对平缓,随着活化时间的增加,两种条件下黄铁矿储能最终趋于一致;~( kJ·mol一)-g~( kJ·mol。1)。活化后颗粒表面能的增加不是影响机械活化黄铁矿储能的主要因素。 ,并对活化后的样品进行了激光粒度和X射线衍射分析。结果表明,实验条件下,氧化锌经机械活化480min后其储能为 ‘1(3 ·mol。1');氧化铜经机械活化480min后其储能为 ~( kJ·mol。)。机械活化后两种氧化物增加的表面能不是影响其活化储能的主要因素。关键词:热量仪;能量学;机械活化;黄铁矿;氧化锌;氧化铜 ABSTRACT The study on energetics of mechanochemistry has important significance formechanical activation ofminerals,mechanical alloying and preparation ofpowders thisstudy,a new setof mechanochemical calorimeter was calibrated and thestorage energy ofmechanically activated pyrites and two kinds ofoxide(ZnO andCuO)were investigated during theprocess ofmechanical activation with thisapparatus. thermal constant,stability,accuracy and blank experiments atdifferenttemperature anddifferentmedium were investigated forthe resultsindicate thattheperformance and functioning of the machine are itiSproper forthestudy ofenergetics during theprocess output power ofmilling at different speed and different temperature were specially investigated through blank experiments. mechanically activated storage energy of pyrites was measured separately during the processing of wet grinding and dry thestructural changes ofmechanically activated pyrites were investigated using lasergranularity analysis and X—ray diffraction results indicate thatthemechanically activated storage energy ofdrygrinding islarger thanthat o