(Solved): a) A rougher flotation bank has 4 cells in it. The feed to the bank has a solids mass flowrate of 1 ...

a) A rougher flotation bank has 4 cells in it. The feed to the bank has a solids mass flowrate of $1500\mathrm{tph}$ and a grade of $1\%$ copper. In order to assess the performance, the flowrate and grade of the concentrate streams from each of the cells was measured: Calculate the cumulative grade and cumulative recovery at each of the four cells (tabulate your results). Draw a graph showing the relationship between these two variables and discuss the trend. [12 marks] b) Flotation circuits typically consist of banks of cells, with a rougher, cleaner, scavenger arrangement being a commonly used one. Sketch a rougher, cleaner, scavenger circuit of your own design labelling the banks and streams. [6 marks] c) An operator decides to decrease the froth depth in the cells in the rougher bank. What will be the impact on the performance of this bank? [2 marks] d) If the operating conditions in the other banks are not changed, what will the likely impact be on the performance of the cleaner bank? How is the circulating load in the recycle stream likely to change? What will the overall impact on the circuit performance be? Explain. [5 marks]