In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called _____________ is produced?
Correct answer: C. Middling
- A. Concentrate
- B. Tailing
- C. Middling
- D. None of these
Explanation
Coal washing produces clean coal, refuse, and middlings. Middlings are the intermediate product containing concentrated mineral matter and some combustible coal, whereas tailings are more commonly associated with ore beneficiation.
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