Which method is used to separate iron-rich minerals like magnetite from unwanted materials?
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A.
Using a magnet to attract the mineral
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B.
Using water to wash away lighter materials
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C.
Using bubbles to lift the mineral
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D.
Dissolving the mineral in a liquid
Correct Answer:
A. Using a magnet to attract the mineral
Explanation:
Magnetic separation is the primary technique used to isolate iron-rich minerals like magnetite because of their strong ferromagnetic properties. This process utilizes magnetic separators, such as low-intensity magnetic drums, to create a magnetic field that attracts and captures magnetite particles while allowing non-magnetic impurities and waste materials to pass through. Once the magnetite adheres to the magnetic surface, it is moved away from the main feed and collected as a concentrated mineral. While other methods like flotation or gravity separation may be used as supplements for complex ores, the inherent magnetic susceptibility of magnetite makes magnetic separation the most efficient and standard industrial solution for its extraction.
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