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ancient gold ore mills in brazil

Almost 100 grams of mercury is added to 60 kilograms of ore in each mill Photo by Marcello Veiga A Mining Boom Brings Risk from Mercury Contamination By Nancy Long Sieber and Joseph Brain Metallurgy in Latin America dates back more than 4000 years Ancient artifacts of gold have been found at numerous sites throughout the Andes...As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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