A METHOD OF HYDROMETALLURGICAL SEPARATION OF IRON AND ITS COMPOUNDS FROM NON-FERROUS METALS AND THEIR COMPOUNDS AND A DEVICE FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a method of hydrometallurgical separation of iron and its compounds from non-ferrous metals and their compounds in which the sludge is leached in an alkalised solution while being exposed to an alternating or direct current until its temperature reaches 40-45°C, then, preferably under the continuous of an alternating or direct current, thus obtained sludge solution is alkalised to achieve a pH in the range of 11.5-14.0, and then a liquid phase is separated from the solid phase, and then the separated solid phase is acidified with an aqueous solution of acetic acid and is subjected to deep leaching, and then the liquid phase is separated from the solid phase and finally thus obtained solid phase is washed with an alkaline solution in order to achieve pH in the range of 6.8-7.2, and then excess water is filtered off, obtaining a solid phase comprising iron, iron compounds, silica, and carbon suitable for repeated thermal treatment. The object of the invention is also a separator (B) comprising an open iron container forming a housing (15) of the separator, a centrifugal pump (14) setting the sludge pulp in motion and a battery of bag filters (21) or a battery of filter discs (16).