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Which of the following methods is used to extract copper from low-grade ores?
Option: 1
Smelting
Option: 2
Electro-refining
Option: 3
Magnetic separation
Option: 4
Heap leaching
Answers (1)
Heap leaching is used for extracting copper from low-grade ores. The crushed ore is stacked in heaps and then irrigated with a leaching solution that percolates through the ore, dissolving the copper content. The leachate is collected and processed to obtain copper.
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