In our blog post, Eight ways to increase manufactured fines production we talk about adding a third stage crusher as one of the ways to increase the production of manufactured fines (MF).
This scenario uses a screen-jaw to remove unwanted fines and small natural rounds prior to entering the jaw and diverting this waste material to a Vertical Shaft Impactor – or cone crusher to produce valuable MF.
This spread uses a 3-stage crushing circuit consisting of a screen-jaw, cone and VSI to make three products: ½” – 3/16” (12.5 – 5mm) rock, - 3/16” (5mm) rock, and MF.
A portable belt feeder is used to scalp oversize rock and provide a desirable feed with no holes in the flow to optimize crushing performance. The ELRUS Screen-Jaw with a 6x16’ 3-Deck screen sends 5/8 to 3-1/2” rock to the cone which is close-circuited with a MS612 3-Deck screen to produce 12.5 to 5 mm rock and the by-product 3/16” sent to the stockpile. The middle deck removes 3/16” – 5/8 naturals and sends them to a second MS612 and VSI to make MF and remove -3/16" via the bottom deck and send it to a stockpile.