Method and apparatus for treating solid residues containing...

Details Method and apparatus for treating solid residues containing... Method and apparatus for treating solid residues containing...

C - Chemistry, Metallurgy

22

B

53/369, 23/412

C22B 7/00 (2006.01) B03B 9/04 (2006.01) B09B 3/00 (2006.01) C22B 7/02 (2006.01)

Patent

CA 1307118

ABSTRACT OF THE DISCLOSURE In the treatment of solid residues containing heavy metals from combustion plants, the heavy-metal compounds dissolved after washing-out and subsequently precipitated are separated from the solvent, usually water or slightly acid aqueous solutions by cross- current diaphragm filtration. The sludge obtained during filtration and comprising precipitated insoluble heavy-metal compounds is dewatered together with the remaining solid residues and made suitable for dumping, e.g. by using binders. The cross-current diaphragm filter improves the washing of heavy metals out of the washing or waste water, and the method and the associated plant are simplified by the joint processing of the sludges containing solids.

614181

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