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The unwanted waste rock (gangue) falls to the bottom and is removed. The froth is skimmed off the surface and the enriched ore (mainly the copper mineral) is taken away for roasting. The mixture of water, foaming agent and paraffin is recycled. After this stage the enriched ore now contains about 25% copper by mass.
An ore is a rock or mineral that has enough metal in it to make it worth extracting. Mining copper About 200 years ago the UK was an important world source of copper and tin and there were mines in Cornwall and Devon. These mines have now closed and today the biggest copper mines are in Chile (Escondida mine) and Indonesia (Grasberg mine).
Acid rock drainage from waste rock. Although the character of waste rock varies with the type of ore, many waste rocks contain sulfide minerals associated with metals, such as lead, zinc, copper, silver, or cadmium. An important sulfide mineral common in waste rock is pyrite, iron sulfide.
The modernization of the Bingham Canyon Mine allows KUC to produce nearly 152,000 tons of ore per day. An equivalent amount of waste rock is removed from the mine each day. Ore and waste rock are transported within the pit to the adjacent waste rock disposal areas by haul trucks with capacities as large as 240 tons.
In 1989, an independent report by Applied Geology Associates in New Zealand noted that significant amounts of copper and other heavy metals were leaching from the mine and waste rock dumps and flowing into the Kawerong River. Today, the water in some rivers and streams in the mine area is a luminescent blue, a sign of copper contamination.
Waste rock particles do not adhere to the bubbles and drop to the bottom of the tank. The waste material that comes out of the bottom of the tanks at the tail end of this process is called tailings. It is nothing more than ground-up rock with the copper minerals removed.
Environmental Impacts of Mining in the Keweenaw . Nov 15 2017 The main byproducts of copper mining in the Keweenaw were waste rock piles from the mines tailings from the stamp mills and slag piles from the smelters Waste rock piles locally called poor rock once dotted the landscape accompanying every shaft of every mine These piles have slowly disappeared as the poor rock is a …
Mining processes generate two kinds of waste products: pieces of rock from the mining operations and fine rock materials and perhaps chemicals from the mineral processing operations. Waste rock, foreground, from Diavik Diamond Mine open pits. Top right is the mine’s processed kimberlite containment area.
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