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Boiling with concentrated sulfuric acid to separate silver and gold is called affination Silver bearing ore was ground and then mixed with salt roasted copper ore and This resulted in the United States becoming the world 39 s largest silver for telephone relays circuit breakers and other electrical switching equipment

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This resulted in the United States becoming the world 39 s largest silver producer until the 20th century when it was surpassed by Mexico and South America particularly Peru After flotation separation the concentrate would contain 1 7 percent silver 10 to 15 percent lead 10 to 15 percent copper and 6 percent antimony

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Boiling with concentrated sulfuric acid to separate silver and gold is called affination Silver bearing ore was ground and then mixed with salt roasted copper ore and mercury This resulted in the United States becoming the world 39 s largest silver producer until the 20th century when it Polygraph Lie Detector Machine

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