Experience With Large Diameter Ball Mills at Bougainville
The performance of the nine 5.5 m diameter 6.4 m mills 18 21 ft initially installed at Bougainville Copper Ltd. did not meet the laboratory and pilot plant derived design expectations as measured by Bond Work Index.During the post commissioning period inefficient grinding of coarse material resulted in a build up of large circulating loads and led to reduced throughputs
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