进口铝土矿的拜耳法溶出工艺研究

Study on Bayer digestion process of imported bauxite

我国铝工业的高速发展对铝土矿的需求急剧增加,致使我国铝土矿资源日趋匮乏,为保证我国铝工业的可持续发展,逐年加大了国外进口铝土矿的使用。国内某企业在现有拜耳法系统中对国外进口铝土矿生产氧化铝进行了试验研究。本文分析了此进口铝土矿的溶出苛性碱浓度、溶出矿浆分子比、赤泥铝硅比、溶出率等工艺技术参数,为进口铝土矿的有效使用积累了经验。

With the rapid development of China's aluminum industry,the demand for bauxite is increasing rapidly,which leads to the shortage of bauxite resources in China.In order to ensure the sustainable development of China's aluminum industry,the use of imported bauxite is increased year by year.The production of alumina from imported bauxite in Bayer process was studied by a domestic enterprise.This paper analyzes the technical parameters of the imported bauxite,such as the concentration of dissolved caustic soda,the molecular ratio of dissolved pulp,the ratio of aluminum to silicon in red mud,the dissolution rate,etc.,which has accumulated experience for the effective use of imported bauxite.