Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials
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United States of America Patent
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May 25, 1999
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N/A
app pub date -
Oct 25, 1996
filing date -
Oct 25, 1996
priority date (Note) -
Expired
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Abstract
A method for separation and recovery of metals and metal oxides from industrial minerals and waste materials containing zinc, lead, cadmium, arsenic, iron, mercury and selenium. The metals and metal oxides in dust form are mixed with a reducing agent and additives, agglomerated, heated above 800.degree. C., and contacted with a flow of inert, reducing or slightly oxidizing gases to volatilize the metals and metal oxides for recovering separate from solid residual product.
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