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The identifiion and testing of a method for mercury-free gold
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many areas are still using dry milling machines and other unsafe practices ( including mercury amalgamation) which are continuing to expose miners, their families,
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B. The actors in the mining cycle and their grinding criteria . Box 4 The saltpetre industry and the development of small-scale mining in the great Two typical examples of the period are the 1848 gold fever in California and nickel operation, or the provision of materials, equipment and tools for this industry (art. 152).
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