Excellent Presentation of Ore Sorter and its Grade IncreasesSee slide #32 of the Caribou Project 2023 Presentation (
https://osiskodev.com/wp-content/uploads/2023/10/ODV-Investor-Presentation-Oct-23_FINAL.pdf ).
Ignore other details as this project is underground mining but grades are similar but a tad lower..3.72 grams versus 4.5 grams .
Osisko has tested the sorter out and it works as planned.
A new communition is to be added to Nugget Pond once that mill is upgraded ....communition means ground into smaller particle size...here less than 10 mm.
Note how communition alone will elevate the mill grade to 4.29 from 3.72 at feed ..increased recovery as smaller particles have increased surface area to volume .
Note also that the combo of communition and ore sorting elevates the feed of 3.72 grams to milled grade of 6.39 grams ...60% increase .
Essentially this process increases the milled output of Nugget pond mill to about 1200 tpd from 700 tpd .
Note also that the sorter costs just $1 per ton ...