gold recovery from sim cards and cell
phones
a sim card is a plastic card that is
embedded with an integrated circuit
an ic sim cards are usually manufactured
from plastic
namely polyvinyl chloride or pvc
the sim card uses gold to produce two
parts
the first is gold wire to connect the
die
the integrated circuit to the contact
strip
the second part is gold-plated contact
strip
to connect to cell phones
many people are wondering do sim cards
contain
gold and if so how much
today i will recover gold from my sim
card cell phones
the key problem is the collection of
enough quantity
for gold recovery we use
68 nitric acid mixed at a ratio
of one to one with water to remove metal
to separate the gold from the contact
area of the sim card
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separate gold sheets mixed with pvc sim
cards
using a colander then wash it with water
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acid is a good way to make pure gold
aquaria is a mixture of nitric acid and
hydrochloric acid
at a ratio of one to three
use sodium metabisulfate
to precipitate gold out of the aqua
regia solution
you will get a gold sludge powder that
looks like mud
sodium metabisulfate also known as
sodium
bisulfate is an affordable and effective
selective precipitate
the chemical can recover up to 99.95
percent
of pure gold when the precipitated gold
is thoroughly rinsed
it works well even at room temperature
make dry using low heat to avoid
splashes
how to melt gold into cubes
sprinkle a little a little borax powder
before and after melting
for the perfect melting technique there
are many methods for melting gold into
cubes
using induction heater melting gold into
cubes
will be fast and convenient
or you may use a butane gas flamethrower
burner
you may need to be careful of splashes
of gold powder while using
okay
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