The Barmac VSI crushing mechanism exploits natural flaws within the ore. The Barmac VSI is utilised to expose the target mineral for more efficient liberation.
Some ore bodies will not withstand the cost of milling down to micron sizes, or the ore may be disseminated in such a way that its unnecessary to reduce it to very fine sizes for satisfactory recovery.
To obtain optimum results from the leaching process the ore must be carefully reduced to a particle size that ensures the maximum liberation of target mineral/s. An example of this technique is leaching.
Reduction of the grain size allows more rapid dissolution of the target mineral/s. Cost aspects of fine crushing and/or grinding must be weighed up against the extra recovery that may be expected. Also, consumption of the reagent due to finer gangue particles is higher.