文档介绍：本科生毕业设计(论文)
回收Al(OH)3制备α-Al2O3 的工艺研究
回收Al(OH)3制备α-Al2O3 的工艺研究
Preparation of α-Al2O3 Using Recycled
Al (OH)3
总计:毕业论文 29 页
表格: 5 个
插图: 17 幅
南阳理工学院本科生毕业设计(论文)
回收Al(OH)3制备α-Al2O3的工艺研究
Preparation of α-Al2O3 Using Recycled
Al (OH)3
学院(系): 生化学院
专业: 化学工程与工艺
学生姓名: 鲍涛
学号: 16107047
指导教师(职称): 申明乐(副教授)
评阅教师:
完成日期: 2011年5月
南阳理工学院
Nanyang Institute of Technology
回收Al(OH)3制备α-Al2O3 的工艺研究
化学工程与工艺专业鲍涛
【摘要】利用华光印刷公司生产PS版所产生的废酸和废碱可以加工成无定形氢氧化铝,其中氢氧化铝经过加工老化,可以变成拟薄水铝石,或者可以进一步处理成高附加值的α-Al2O3。本文研究了不同原料(无定形氢氧化铝和拟薄水铝石),煅烧温度,保温时间,晶种和氟类添加剂对α-Al2O3晶粒度的影响。试验表明,煅烧温度的升高、保温时间的延长都能使α-Al2O3晶粒度长大。简单煅烧下,煅烧时间在较低温度(1400℃)下有助于α-Al2O3晶粒度生长,但很难形成纳米级产品;晶种和氟类添加剂可加速相转变过程中物质的扩散和传输,降低α相的相变温度,有利于形成纳米级α-Al2O3 ;拟薄水铝石的煅烧条件则很难控制,不容易形成纯度高的纳米级α-Al2O3。
【关键词】氢氧化铝煅烧纳米氧化铝
Preparation of α-Al2O3 Using Recycled
Al (OH)3
Chemical Engineering and Technology Bao Tao
Abstract: Huaguang pany using PS version of the waste acid and waste alkali can be processed into amorphous aluminum hydroxide, aluminum hydroxide, which processed aging, can be turned into quasi-boehmite,can also be further processed into high value-added α-Al2O3. In this paper, different raw materials (amorphous aluminum hydroxide, boehmite and pseudo), calcination temperature, holding time, seed and fluorine additives on α-Al2O3 grain size. Test showed that the calcination temperature, holding time can make the grain size of α-Al2O3 growth simple the calcination time at a lower temperature (1400 ℃), help the growth of α-Al2O3 grain size, but it is difficult to form nano-scale products; crystal species and fluorine additives can accelerate the transformation process and the diffusion of substances Transmission, reducing the phase transition temperature of α phase, is conducive to the formation of nano α-Al2O3; To be calcined boehmite conditions are very difficult to control, not easy to form high purity nano α-Al2O3.
Key words: Aluminum hydroxide Calcine Nano-alumina
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