Question

A mixed metal material that is recovered from MSW is further processed by using a magnetic binary separator that separates ferrous metals from non-ferrous metals. The mixed metal material enters the separator at a rate of 2.5 tons per day. Ferrous metal makes up 65% of this material. The product recovery stream leaves the separator at a rate of 1.75 tons per day with 88% of that being ferrous metals. The remainder of the material leaves the separator in the material reject stream.

a) Calculate the percent of ferrous metal recovery
b) Calculate the purity of the ferrous metal in the product recovery stream
c) Calculate the overall efficiency of the separator