Given a separation process with a rougher and a scavenger, from the data below, determine the Materials Balance Table or Operations Data Table for the process with the material producing two concentrates, and then with the Middlings from the scavenger being reprocessed in the rougher. State your assumptions for the calculations.
|
Product
|
weight in kg
|
weight %
|
Grade % Pb
|
Recovery % Pb
|
|
Concentrate
|
56
|
|
65
|
|
|
Middlings
|
102
|
|
15
|
|
|
Tailings
|
834
|
|
0.8
|
|
|
Feed (Calculated)
|
|
100
|
|
100
|
|
Feed (Actual)
|
1000
|
|
6.1
|
|
a) Draw and label a Flow diagram with the given information shown in brackets and with calculated recovery per stream.
b) Draw and label a Flow diagram with the middlings returned to the rougher.
c) Produce a Materials balance table for before and after reprocessing of the middlings.
d) Report improved % recovery assuming no change of grade.