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Study on the Dissolution Dynamics of Bauxite at High Temperature ABSTRACT
In
this paper, the dissolution behavior if quartz in soda aluminate liquor was
investigated. The experiments were carried out in different free caustic
concentrations and under different temperature. During digestion process of
quartz, caustic alumni and silica concentration were analyzed, and silica
concentration curves were given. In the meanwhile, the quantity of acid-soluble
silicon in the red mud was analyzed and quartz dissolution curves were given
too. On the basis of these results, the various effects of quartz on diaspore
digestion process were discussed, and some reasonable methods which can
eliminate the effects were suggested of calcium with the addition lime. The dissoluble behavior of rutile in Bayer Liquor was also studied. The acid-soluble titanium in the red mud was analyzed. Rutile dissolutions curves were given, different free caustic concentration and under different temperatures and the mechanism of rutile digestion was discussed and deduced. KEY WORDS Bauxite, Diaspore, Digestion, Bayer Liquor |