用拜耳法生产氧化铝时,在溶出前把铝土矿与添加的石灰一起,在循环溶液中于～100℃下存放若干时间。从尤哈斯的著作和乌拉尔诸铝厂的生产实践中得知,这样存放可减少随弃赤泥带走的碱和氧化铝的损失。但是产生这种现象的原因尚不清楚。根据文献指出,在相类似条件下,把铝土矿预先存放在循环溶液中,氧化硅可从铝土 In the Bayer process for the production of alumina, bauxite together with added lime is stored in a circulating solution at ~ 100 ° C for some time prior to dissolution. Judging from the writings of Jujas and the production practices of the Urals Aluminum Works, this storage reduces the loss of alkali and alumina with the spent red mud. However, the reason for this phenomenon is not clear. According to the literature, under similar conditions, the bauxite is stored in the circulating solution in advance, and the silica can be obtained from bauxite