Method and apparatus for recovering fractional components of soil
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United States of America Patent
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Mar 17, 1998
Grant Date -
N/A
app pub date -
Jul 3, 1996
filing date -
Jul 3, 1996
priority date (Note) -
Expired
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Abstract
A method of removing fractional components from earthen material, including processes for removing precious carbon jewels from soil, precious metals from low grade ores, lead pellets from contaminated soil, and free sulphur from coal, is initiated with a pulverizing of the earthen material bearing the fractional component to be removed therefrom. Subsequent process steps vary, but include the washing of the pulverized material and then removing the fractional component through electromagnetic extraction, chemical dissolution and sieving. Since no contaminate is added to the residue remaining after removal of the fractional component, the residue can be returned to the ground from which the original material was obtained without effecting any additional pollution to the ground or water.
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