(1.貴陽鋁鎂設(shè)計(jì)研究院，貴陽 550001;
2.北京有色冶金設(shè)計(jì)研究總院， 北京 100038)
摘 要: 解決了與赤泥有關(guān)的環(huán)境相容性問題。拜耳法赤泥與適量 的石灰混合，經(jīng)石灰消化、水熱處理、煅燒處理和堿液溶出，可從赤泥回收 70%以上的Al2O3 和90%以上的Na2O，并使不溶殘?jiān)蠳a2O 含量降到 1%以下。分離的鋁酸鈉溶液被送往拜耳法溶出料漿稀釋過程，分離 的殘?jiān)贿M(jìn)一步在750～950℃煅燒，制得活性β-C2S為主的膠凝材料，可用作水泥的活性混合成分。
關(guān)鍵字: 赤泥 水熱處理 煅燒處理
（1.Guiyang Aluminium Magnesium Design and Research Institute, Guiyang 550001 ;
2.Beijing Nonferrous Metals Design and Research Institute, Beijing 100038）
Abstract:The environmental pollution problem related to red mud derived from Bayer process has been resolved. By mixing red mud with lime calculated and subseqent process including lime slaking with an amount of water, and the mixtures being hydrothermal treated and calcination treated and lixiviated with soda liquor as well, 70% of tatal Al2O3 and 90% of total Na2O were recovered from red mud, and Na2O conten t in residue was decreased to 1%. Sodium aluminate solution separated was sent to dilution process of Bayer digested liquor and residue separated was subjected to calcine at 750～950℃ and then active belit cement material mainly composed of β-C2S was goten.
Key words: red mud hydrothermal treatment calcination treatment
