Effect of Coal Source on Quallty of Bauxite for Refractories Applications

Bauxite from Qingzhen is calcined for refractories applications.Three fuel sources with different amounts of residual ash and ferric oxide were used for bauxite calcination in a rotary kiln.It is found the quality,including the content of ferric oxide,bulk density,apparent porosity and water absorption,of the bauxite is highly influenced by the fuel source of rotary kiln.In essence,the effect of fuel on the quality of bauxite is attributed to the arrount of ferric oxide introduced by the fuel.Introduction of a modest quantity of ferric oxide is beneficial for promoting the densifwation of bauxite.