gold melting and grading processing machine

TheMiller processuses gaseous chlorine to extract impurities whengoldis atmeltingpoint; impurities separate into a layer on the surface of the molten purifiedgold. TheMiller processis rapid and simple, but it producesgoldof only about 99.5 percent purity. The Wohlwillprocessincreases purity to about 99.99 percent by electrolysis

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