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Which commercial bioleaching processes among the following involves piling up of uncrushed waste rock?

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in Environmental Biotechnology by (64.7k points)
Which commercial bioleaching processes among the following involves piling up of uncrushed waste rock?

(a) In Situ

(b) Dump Leaching

(c) Heap Leaching

(d) Vat Leaching

I got this question during an interview for a job.

Question is from Metal Recovery by Bioleaching Process topic in portion Bioleaching and Biomining for Recovery of Resources of Environmental Biotechnology

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The correct answer is (b) Dump Leaching

The explanation is: Dump leaching involves uncrushed waste rock which is piled up. It is an industrial process to extract rare metal ores or copper. This process is similar to heap leaching but in case of dump leaching the ores are taken directly from the mines.

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