What is a grade-recovery curve?
The theoretical grade-recovery curve for an ore is a definition of the maximum expected recovery by flotation of a mineral or element at a given grade. This is defined by the surface area liberation of the value minerals and is consequently directly related to the grind size utilised in the process.
How do you calculate recovery from flotation?
This can be calculated using weights and assays, as (Cc)/(Ff)·100. Or, since C/F = (f – t)/(c – t), the % Metal Recovery can be calculated from assays alone using 100(c/f)(f – t)/(c – t).
How is recovery grade calculated?
Recovery %
- R = 100 c(f — t)/f (c — t) = recovery %
- By K plus assays f and c.
- R = 100 c/Kf = recovery %
- By weights F and C, plus assays c and t.
- R = 100 Cc / (Cc+t(F—C)) = recovery %
What is recovery in flotation?
Air recovery is a measure of froth stability, and describes the fraction of air entering a flotation cell that overflows the cell lip as unburst bubbles.
What is Grade vs recovery?
What is mass pull in flotation?
Mass pull, or the flowrate of solids reporting to the concentrate, is affected by changes in froth structure and stability which are in turn affected by changes in operating parameters such as air flowrate and froth depth.
How do you calculate your grade ore?
Computation of Tonnage and Grade of Ore by Blocks The volume divided by the volume-per-ton factor gives the tons of ore in the block. Multiplying the tonnage in each block by its average assay value, adding the products, and dividing this sum by the sum of the tonnages gives the average assay value of all the blocks.
What is grade in mineral processing?
What is ore grade and recovery?
What is grade of an ore?
The grade of ore refers to the concentration of the desired material it contains. The value of the metals or minerals a rock contains must be weighed against the cost of extraction to determine whether it is of sufficiently high grade to be worth mining, and is therefore considered an ore.