in gold jewlery casting a big amount of gold is waste.how can we get thise waste n from investment powder?How can we recover gold waste from casting powder?
Castings should always be broken out under water as the silica in investment is dangerous to your lungs in in a dry powder form. Heavier materials (eg. Gold) fall to the bottom.
As for the for the waste you have now, soak it in water for a day or two, then sift through the silt.
Always wear breathing apparatus when handling dry investment powder. It is carcinogenic %26amp; causes silicosis.
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