铝空气电池电解液制备高纯氧化铝的工艺研究

Study on the process of preparing high purity alumina from aluminum air battery electrolyte

随着铝-空气电池应用范围和使用量的扩大,电解液的回收再利用成为了该领域迫在眉睫的问题。文中以铝-空气电池废弃电解液为原料,通过晶种控制沉淀法,加上非常规冶金制得高纯超细氧化铝。主要研究将含有多种杂质的铝酸钠溶液经除杂、晶种分解、酸溶、沉淀、干燥、煅烧、研磨分散制备回收高纯氧化铝,并对产物进行了一系列的表征分析,证明以铝-空气电池废弃电解液为原料可制得形貌规则,纯度在99.99%以上的高纯氧化铝。

With the expansion of the application range and usage of aluminum-air batteries,the recycling of electrolytes has become an urgent issue in this field.In this paper,aluminum-air battery waste electrolyte is used as raw material,and the high-purity ultrafine alumina is prepared by seed crystal controlled precipitation method and unconventional metallurgy.The main research is to remove high-purity alumina from the sodium aluminate solution containing various impurities by impurity removal,seed decomposition,acid solution,precipitation,drying,calcination,grinding and dispersion,and carry out a series of characterization and analysis of the product,it is proved that the high-purity alumina with a purity of 99.99%or more can be obtained by using the waste electrolyte of the aluminum-air battery as a raw material.