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What does the term ore dilution refer to

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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What does the term "ore dilution" refer to?

Answer & Solution
Correct Answer: Option B
Ore dilution is when waste rock is mixed with ore during extraction.The correct answer is: Entry of waste material during miningThis lowers the grade and increases processing cost.Minimizing dilution is key to profitability.
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