Stability of titanium-aluminium nitride (Ti<Subscript>2</Subscript>AlN) at high pressure and high temperatures

The stability of Ti2AlN at high pressure of 5 GPa and different temperatures of 700-1 600 ℃ was investigated using X-ray diffraction (XRD),scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS).Ti2AlN was found to be stable at temperatures as high as 1 400 ℃under 5 GPa for 20 min,and was proved that it held better structure stability than Ti2AlC under 5 GPa through comparative experiments of Ti2AlN and Ti2AlC (representative compounds of M2AX phases (211 phase)).The reaction process at high pressure had some difference from that at ambient pressure/vacuum,and Ti2AlN directly decomposed to TiN and TiAl at 5 GPa and 1 500 ℃ for 20 min.Moreover,the mechanism of phase segregation was discussed.In addition,the behavior of Ti2AlN contacting with Zr at high pressure and high temperature (HPHT) was also studied.     

关于隔膜泵无法开启故障的分析及处理

隔膜泵至上世纪七十年代开始发展以来,经过不断的创新和改造,目前在各行各业的应用也越来越广泛,是石化、氧化铝生产、高固含、高磨蚀的固-液两相介质长距离输送的核心设备。2#隔膜泵无法开启,到现场查看故障信息为齿轮箱润滑油泵电机热失效,造成隔膜泵跳停。齿轮箱润滑油泵电机热保护动作原因为电机过载,检查电机绝缘正常,整定值正常。     

变频器技术在氧化铝工业中的应用

变频器具有的精确性能高、调速范围广、反应速度快、节电效果明显等优点,为氧化铝生产增强工艺自动化程度,降低生产成本提供可能。文章对变频器在料浆泵、二旋进料泵和焙烧引风机、隔膜泵、过滤机、定量给料机上的应用进行了分析。     

Ti3AlC2在静高压下的热稳定性

研究了在静高压条件下Ti_3AlC_2的热稳定性,结果表明:在不同压力(2、3、4和5 GPa)下,Ti_3AlC_2直接分解的最低温度在700-800℃,反应的最终产物主要为Al_3Ti和TiC。具体的分解反应过程取决于压力的大小。     

10kV电动机轴瓦故障处理及分析

球磨机作为氧化铝行业的主要设备,球磨机的运行状况直接关系到企业的生产稳定及效经济益。球磨机的工作任务主要是将铝土矿和循环母液进行混合,利用钢球进行研磨破碎,产出的原矿浆经过稀释后,送往溶出工序进行下一步的作业。而电动机作为球磨机的驱动部分,可以间接作为球磨机运行效率的体现,并且对实现氧化铝的稳定运行和连续作业打下基础。