Process for the production of alumina from the mineral component of solid fuels Patent #: 4113833
ApplicationNo. 06/017484 filed on 03/05/1979
US Classes:423/121, From bauxite210/765, Including liquid recirculation210/769, Destroying cake or solid component210/772, Washing with a fluid other than the prefilt210/806, Plural separating423/111, Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be)423/131Leaching, washing, or dissolving
ExaminersPrimary: Hruskoci, Peter A.
Attorney, Agent or Firm
International ClassesB09B 1/00 (20060101)
C01F 7/06 (20060101)
C01F 7/00 (20060101)
B01D 37/00 (20060101)
B03B 7/00 (20060101)
C01D 1/04 (20060101)
C01D 1/00 (20060101)
Foreign Application Priority Data1978-07-31 IT
AbstractThe invention relates to a process for the disposal of bauxite processing wastes comprising the steps of:(a) filtering the bauxite muds in suspension coming from the washing decanter,(b) continuously washing the dehydrated filtration cake on the filter with hot water with recycling of the liquid phase containing the greater part of the soda into the basic chemical process of the bauxite treating plant.(c) treating the mud cake separated from the filter with sea water to refluidizing the muds and to neutralize the soda residues still present; and(d) conveying the inert and neutralized mud suspension, mixed with sand residual from bauxite processing in filling basins; the invention relates also to a containment basin for the exhausted bauxites obtained with the process constituted of several basin units, singularly comprising a trapezoidal cross-sectioned containment structure or embankment, elevated above sea level, with inner core of permeable sand, lined with "tout-venant" broken rocky material, contained on the outside by large dimension boulders, on the upper part of which is placed the distribution piping of the muds, with introduction of these latter in the basin unit in several different points and provided with a drainage layer on the base.