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Question:

What is the first step for rocks (ore) on their way to the ball mill?

1 assay office2 electro winnowing3 crusher4 leaching

Answer:

If the ore is a sulfide ore, it will first go to the crusher. If the ore is an oxide ore, it will first be leached. (I'm assuming you are talking about copper). SX/EW (Solvent Extraction/ElectroWinning) comes later.

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