涡轮分级机设计.doc

年产1万吨超细铝粉分级系统工艺设计 摘要 本文介绍了氮气雾化生产法铝粉的工艺和涡轮分级系统的设计，雾化法制粉和铝粉的分级都是在氮气保护中进行,保证了生产的安全性，通过调节分级机转速可以获得粒径符合要求的产品。 氮气雾化法是新发展起来的雾化生产工艺，与普通的空气雾化法所不同的是它生产设备完全密封并充满氮气，由于这种工艺采取了密封式的设备和氮气保护的方法，没有了氧气爆燃的条件,所以非常的安全。 涡轮分级系统是通过不同大小的颗粒受到的离心力的不同来实现分级，在离心力的作用下，大或重的颗粒被甩至分级轮外围至分级机边壁，自然下落到出料口进行收集；小或轻的物料受离心力作用小，在分级轮内部悬停，引风机的引力被带至高处。通过变频调节分级轮的转速便可调整分级机中离心力的大小，达到分出指定粒度的物料的目的。 Design of Classification System Process of Annual Output One Million Ton Aluminum Powder Abstract This paper introduces the design method of nitrogen atomization aluminum powder production process and the classification system .to ensure the safety in production,Classification and atomized powder were protected by nitrogen.By adjusting the classifier speed can obtain the product of particle size meet the requirements. Nitrogen atomization process is a new process.Different from the ordinary air atomization method is that it is completely sealed and filled with nitrogen.Due to this process adopts the method of sealing device and nitrogen protection .So its very safe because without oxygen combustion conditions. This turbine classification system’s principle is different size of particles has different centrifugal force.Under the influence of centrifugal force,large or heavy particles were thrown to the outside wall of the classifier wheel then fall into the outlet.Small or light material by the effect of centrifugal force is small, hovering in the the internal of classifier wheel and then powder was taken to the high be collected.By adjusting the classifier wheel speed can change the size of the centrifugal force to separation the powder has different particle size. Keywords: turbine classifier, nitrogen protect, Aluminum Powder 目录 综述 1.1 铝粉的物理性能和用途 1.1.1 铝粉的物理性能 铝粉的外观为银白色粉末，溶点为66℃，沸点为2056℃，相对密度(水=1) 2.70，饱和蒸气压0.13KPa (1284°C)，燃烧热822.9kJ/mol，且不溶于水，但溶于碱、盐酸、硫酸，引燃温度为645℃，最小点火能为15mJ，最大爆炸压力为0.415MPa。 微细铝粉是随着纳米技术及纳米材料的发展而发展起来的一种优良金属颜料。不但表面光滑，金属光泽效应较强，而且还具有一般金属颜料所没有的优良反射光线和反射热量的能力。虽然，铝粉有较多的优点，但是因为铝粉在空气中是导电