Problem 7
A floatation circuit consists of rougher-cleaner circuit to concentrate 
The grade of in feed is  and is delivered qt  . The grade of cleaner tailing is  . The cleaner tailings are recycled to rougher and circulating load is 0.25 (recycle/ fresh feed). The recovery and grade in the concentrate is  and  respectively. Calculate the flow rates and grade of the respective streams.
Solution
| Figure12.3: |
Floatation circuit to show arrangement of rougher and cleaner along with inputs and outputs. |
Solution:
Material balance at steady state of rougher
 |
(1) |
Cleaner total mass balance
 |
(2) |
 is mass of rougher tailing in  is mass of rougher concentrate, mass of cleaner concentrate.
Rougher  balance
 |
(3) |
 and  grade in rougher tailing and cleaner concentrate respectively.
Cleaner balance
 |
(4) |
 is grade in cleaner concentrate
By equations 3 and 4 we can determine
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