Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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Cu-Pb-Zn recovery calculations (2 replies)

B
Boikanyo
3 years ago
Boikanyo 3 years ago

I conducted rougher Cu-Pb-Zn flotation tests and would like to calculate the recovery of the target metal in each circuit (example: Cu in Cu-circuit) as well as the % wrongful recovery of the other 2 metals (Pb and Zn in Cu-circuit). During testing I recorded the masses of the feed, 3 concentrates, and tailings. I tried using several formulae from the forum, ones that use the mass and assay results but the total recovery for each metal do not add to 100%. Please see attached spreadsheet for clarity.

Also, in cases where not enough concentrate mass for one of the circuits was collected, what formulae do I use to calculate the unknown (assay)?

Many thanks

B
Boikanyo
3 years ago
Boikanyo 3 years ago
Like

Please see attached file for clarity on the above question. The earlier attached file is incompatible.

Example 1
https://www.911metallurgist.com/wp-content/uploads/2021/06/Example_1.jpg
Mike
3 years ago
Mike 3 years ago
Like

If you use feed, concentrate, and tails in the calculation, you will seldom (read almost never) get 100%.   This has to do with with timing of the recovers and other factors such as accuracy of assays (never perfect) and recording of weights (wet vs dry) and scale precision and accuracy (not the same thing)..  It is best to use two of the numbers (say feed and concentrate) and calculate the tails and then use statistics to see if you are significantly off.

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