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Nitric Acid In Gold Ore Processing

Us3793429a Nitric Acid In Gold Ore Processing. A sulfide ore material containing sulfide iron and values of one or more metals in the group consisting of copper nickel cobalt and silver is subjected to leaching with an aqueous solution of nitric acid under conditions controlled to insure the formation of easily filterable hydrogen jarosite 3fe2o3.so3.4so3.9h3o or a similar butless desirable ...

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