Liberation and Free Surface Area in the Float Feed
Liberation measurements estimate the volumetric grade distribution of a mineral as a measure of the quality in a processing stream (Spencer and Sutherland, 2000). Put simply, it is based on the area % of the mineral grain in the particle
Whats new in Process Mineralogy Technology: The QEMSCAN EXpress
For those of us using Process Mineralogy on a regular basis, the introduction of more accessible systems, such as the QEMSCAN EXpress, opens a new door to generate meaningful mineralogical information at site, reducing turn-around times and allowing metallurgists to use mineralogy more as a predictive tool and less as a reactive post-mortem of what went wrong
Understanding what is feeding your process: How ore variability costs money!
Too often operations utilise ore type definitions that are based on geological or mining characteristics and have little relation to the processing behaviour of the material. This is perfectly valid for resource definition and mine planning but when applied to processing can be misleading. While there are situations where the relationship is valid, for the majority of operations there do remain subtle differences in how ore domains should be processed.
It is really great to see that MEI’s Process Mineralogy ’12 conference in Cape Town, South Africa was such a great success. Unfortunately MinAssist was unable to attend but Barry Will’s has provided a great summary on the MEI Blog. Congratulations to the MEI team and all the presenters.
What is a theoretical grade-recovery curve? An example.
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. The theoretical grade-recovery can be readily used to quickly identify potential recovery increases that can be gained through optimisation of flotation circuits and whether the process is running efficiently.