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| Number | Title | Issue Date |
| 7012209 | Method of gold separation and gold separation device A method of collecting gold by flowing water over a gold collecting medium located in a sluice to induce a positive surface charge on the gold collecting medium. Feeding gold laden material into the sluice with the flowing water to induce a negative surface charge o... | 03/14/2006 |
| 4851036 | Mineral ore flotation process and apparatus There is disclosed a process and an apparatus for beneficiating a mineral ore, such as phosphate-containing ore, in a substantially vertical column. The feed subjected to the benefication preferably has a particle size of less than 20 mesh. The feed is in... | 07/25/1989 |
| 4725313 | Method of extracting a precious metal from an ore A method of recovering a precious metal from an ore comprises treating the ore with a cyanide solution and simultaneously treating the ore with mercury to cause amalgamation with the precious mineral.... | 02/16/1988 |
| 4671868 | Method for recovering gold, platinum or silver from an ore containing gold dust, platinum dust or silver dust A method of recovering gold from an ore containing micron gold or gold dust is disclosed. The gold is recovered by providing a silver coated surface, coating the silver coated surface with mercury, washing a mixture of ore and water over the mercury such ... | 06/09/1987 |
| 4597791 | Gold recovery processes The present invention relates to a process for the separation of gold from particulate material containing gold, which comprises introducing a hydrophobic liquid, a non-gold particulate hydrophobic bulking material and particulate, gold containing materia... | 07/01/1986 |
| 4019971 | Method of recovering fine gold from ore Ore bearing small particles of precious metal which forms an amalgam with mercury is passed in a water-ore pulp first over a positively charged conductive surface to neutralize particles of organic matter and then over amalgamating plates, flouring of mer... | 04/26/1977 |
