【摘要】 用均匀沉淀法制备纳米ZnO中试研究表明 :尿素水解和沉淀反应采用间歇操作的搅拌釜式反应器是合适的 ;小试提供的原料路线是可行的 ,工艺条件是正确的 ;进一步放大在满足工艺条件的前提下 ,反应前升温的供热强度不小于 60kJ/(min·L) ;反应结束后的冷却换热强度不小于 2 7kJ/(min·L)。中试装置的生产能力为 2 0t/年 ,产品纳米氧化锌粒径为 35～80nm ,收率达到 80 %。更多还原

【Abstract】 The homogeneous precipitation method is used for preparing nanometer size zinc oxide in the pilot test. The test results show that the batch stirring reactor is suitable for hydrolysis of urea and precipitation reaction, the raw material and process conditions in lab.test are applicable for pilot scale.In the pilot test, the heating strength is not less than 60kJ/(min·L) for temperature raise stage before reaction and the cooling strenth is not less than 27kJ/(min·L) for cooling stage after reaction.The production amount of pilot test installation is 20t/year,the particle diameter of nanometer size ZnO prepared is 35～80nm and yield 80%.更多还原