56. 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.
57. Weber number is significant and is concerned with the
58. With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge
59. Chance process is used for the
60. What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls?
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