Metal recovery process
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United States of America Patent
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Feb 12, 1991
Grant Date -
N/A
app pub date -
Oct 11, 1989
filing date -
Oct 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for the recovery of a valuable metal(s) from its ore(s), that includes a method for removal of environmentally hazardous, volatile material prior to the removal of the metal(s) from its ore pulp or liquor carrier. The process comprises forming a pulp of particles of the ore(s) and leaching from that pulp the valuable metal component via the formation of soluble metal complexes. As elements of the leaching chemicals used are often volatile at least the liquor component of the metal containing pulp is contacted by flow of gas to remove any volatile content. In the case of the leaching chemicals volatile elements the recycling of the volatile element to reform the original leaching chemical is a substantial advantage. The metal is removed from the pulp, or its liquor component, by methods known in the art such as adsorption onto carbon or resin, electrowinning, zinc cementation, precipitation solvent extraction or the like. The metal is then recovered in its solid form.
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