TUBE DIGESTION TECHNOLOGY FOR THE MID-QIAN BAUXITE

来源期刊：中国有色金属学报(英文版)1996年第3期

论文作者：Liu Zigao Yang Changshi

文章页码：44 - 48

Key words：bauxite;　lime;　tube digestion;　scale

Abstract: Satisfactory results are obtained when the mid-Qian sedimentary diasporic bauxite is subjected to Bayer digestion at 245~280℃with the addition of certain amount of lime. The conditions influencing the digestion process, according to their importance, are as follows: temperature, caustic soda concentration of starting liquor, residence time and burden molar ratio, etc. Conditions for both traditional and tube digestions have been determined. Adding excessive lime and adopting single-stream tube digestion technology are of great advantage for retarding velocity of scale growth on the surface of heat exchangers and for treating and utilizing red mud etc. in the meanwhile.