Extractions of Tin Metal from Electronic Circuit Scrap by Wet Techniques
Engineering and Technology Journal,
2012, Volume 30, Issue 20, Pages 3603-3615
AbstractAccording to the larger accumulation of electronic equipment, then new
environmental techniques (wet extraction process) are studied to treat these
scrap and produced a utilized metal such as tin metals that used in different
Different experimental are carried out in this studied in order to optimize the
production of Tin metal from scrap circuits (stannous chloride) such as
temperature of reaction (30, 35, 45, 55, 60 c°) concentration of scrap
introduced (5.0, 7.0, 10.0, 13.0, 15% wt.) and residence time through smelting
step as (2.0, 2.5, 3.5, 4.5, 5.0 hrs) respectively.
A characterization and monitoring for production metals occurred by the use of
x-ray scanning electron microscope to scan the internal structure of Tin metal,
also an atomic absorption to determine the concentrations of Tin agglomerates.
The results show that; optimum conditions that produced high percent of
Tin metal from stannous chloride are (53°c temperature of residence, 8.5 wt%
concentration of and 4.7 hrs residence time for reduction step at 2°c/min
rating ratio). Afterward for smelting stage are (388°c curing temperature and 5
hrs residence time).
Also the characteristic results proved that; agglomerate of Tin metal
products appeared at these optimum conditions at x-ray and atomic absorption
as 0.25 wt. % for standard blank metal as Cu and clear agglomerate of Tin
metal in the electron microscope.
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