COCHISE COUNTY, ARIZONA . Cochise County is third among Arizona's gold producing counties in quantity of gold produced. This county produced approximately 3 million ounces of gold between 1879 and now, more than half came as a by product of the Bisbee copper ores and only 1000 ounces of placer gold are included in the total.
The Mining industry of Ghana accounts for 5% of the country's GDP and minerals make up 37% of total exports, of which gold contributes over 90% of the total mineral exports. Thus, the main focus of Ghana's mining and minerals development industry remains focused on gold. Ghana is Africa's largest gold producer, producing t in 2008.
During this period, the company mined 22,662 tonnes of ore and the Tahuehueto toll mill processed 14,377 tonnes of ore averaging g/t gold, g/t silver, percent zinc and percent lead. Average recoveries of the processed ores included percent for gold, percent for silver, percent lead and percent zinc.
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Copper/Molybdenum Ore. The figure above is a simplified flow sheet showing the basic steps involved in a copper mill producing the byproduct molybdenum. The crushed copper ore (containing, for example, % Cu and % Mo) is fed to the grinding circuit where water is added and the ore is ground to the proper size.
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Of the many mining operations, the Old Abe Mine was the largest, employing some forty workers yielding between fortyfive to fifty tons of gold ore per day. Other operations included the Robert E. Lee, the Smuggler, the Rita, Lady Godiva, Little Mack, Silver Cliff, Miners Cabin mines.
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