The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be_________________?
Correct answer: C. 1.34 Wi
- A. 0.5 Wi
- B. Wi
- C. 1.34 Wi
- D. 3.34 Wi
Explanation
Open-circuit grinding generally consumes more energy than closed-circuit grinding because particles are not repeatedly returned for further size reduction. The standard Bond correction is an open-circuit work index of about 1.34 Wi.
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