Page 40 - january

SUCCESS SECRET
Scientists of Uralmekhanobr have developed a

comprehensive technology for processing metal

waste of non-ferrous metals

Scientists of Uralmekhanobr JSC have developed a complex technology for processing
metal waste of non-ferrous metals (copper, lead, tin, antimony, precious metals) - waste printed
circuit boards.
The classical processing of this type of raw material is based on the smelting of blister
copper, its fire refining, followed by the casting of anodes, which are further processed by the
electrorefining method to obtain marketable cathode copper and precious metal concentrate.
The high content of tin and lead in the feedstock (up to 20%) significantly complicates the
processing of waste printed circuit boards at the stage of fire refining and subsequently slows
down the anodic dissolution up to its complete termination.
The developments of the specialists of the Uralmekhanobr Institute make it possible to
simplify significantly this process, excluding the operations of fire and
anode refining, as well as the casting of anodes.
As a result of the research, the employees of the hydrometallurgy
laboratory of Uralmekhanobr have developed a technology for processing
metal waste of non-ferrous metals, based on the transfer of copper into
a sulfuric acid solution from the original alloy or from the product of its
primary smelting (black copper). The transfer of copper into solution
is carried out using an environmentally friendly oxidizing reagent. The
resulting solution is suitable for copper extraction by electroextraction.
Note also that in the course of research in the laboratory, cathode copper
was obtained, which meets the chemical composition requirements for cathode copper grades
M0k, M1k and M2k.

UMMC

40 Stanochniy park