用联合法处理河南某地区的一水硬铝石型高硅铝土矿提取氧化铝,在拜耳法高压溶出系统遇到不少困难,如矿浆用过热蒸汽直接加热搅拌时,由于蒸汽的冷凝水使矿浆的碱液浓度大幅度的冲稀而降低了矿浆Al_2O_3的溶出率,加重了母液蒸发的负担,增加了汽耗;另外, The United States to deal with a combination of diaspore in a high-silica bauxite in Henan Province to extract alumina, Bayer process high pressure dissolution system encountered many difficulties, such as pulp with superheated steam directly heated stirring, the steam condensate So that the concentration of pulp lye substantially diluted dilute and reduce the dissolution rate of the slurry Al 2 O 3, increased the burden on the mother liquor evaporation, increased steam consumption; In addition,