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1.引言曾提出过多种生产高纯氧化铝的方法。由拜耳法或其它类似方法制备的氧化铝含有钠离子。要除去这些钠离子使焙烧氧化铝产品的纯度不受影响,是不容易的。鉴于这些情况,
1. INTRODUCTION Various methods of producing high purity alumina have been proposed. Alumina prepared by the Bayer method or other similar methods contains sodium ions. It is not easy to remove these sodium ions to keep the purity of the roasted alumina product unaffected. Given these circumstances,