3) A rare-earth element (REE) ore comprising bastnasite, fluorite and barite in a hard rock matrix (consisting mainly of limestone/calcite and silica/silicates) is processed to produce three concentrates. The flowsheet in simplified form below was shown to be efficient. a) The feed size distributions produced by the crushing plant for the rod mill and the ground product discharge from the rod mill were determined by sieve analysis, and the results are shown on the left and right below. If the processing rate is expressed as 150 tonnes of ore /h on a dry basis and the hardness of the ore (Wi for rod milling) is 11.36kWh/ tonne, what is the net energy required by the motor before any safety factor? b) The ore after rod milling assays 6.24% REE, 12.31% barite, and 20.1% fluorite as the feed to the Shaking Table. The concentrate (i.e., CH the heavy fraction) from the S- Table assays 13.62%REE, 26.82% barite and 13.2% fluorite, which leaves behind a tailing from the S-Table assaying 0.15% REE, 0.34 barite, 53.64% fluorite. What are the \% recovery of REE and the concentrate tonnage (i.e., CH ) from the S-Table based on the feed rate of 150 tonnes/h (using the numerical values of f, c, and t in blue font as well as the F)? 32 marks