(1.贵阳铝镁设计研究院，贵阳 550001;
2.北京有色冶金设计研究总院， 北京 100038)
摘 要: 解决了与赤泥有关的环境相容性问题。拜耳法赤泥与适量 的石灰混合，经石灰消化、水热处理、煅烧处理和碱液溶出，可从赤泥回收 70%以上的Al2O3 和90%以上的Na2O，并使不溶残渣中Na2O 含量降到 1%以下。分离的铝酸钠溶液被送往拜耳法溶出料浆稀释过程，分离 的残渣被进一步在750～950℃煅烧，制得活性β-C2S为主的胶凝材料，可用作水泥的活性混合成分。
关键字: 赤泥 水热处理 煅烧处理
（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
