Facts & Figures Book - KPI-JCI

MULTI-ANGLE SCREENS20 °20 °20 °10 °10 °10 °0 °0 °0 °PATENT PENDINGCombo ® Screens combine the advantages of both aninclined screen and a horizontal screen. The screen isequipped with incline panel sections that begin with a20-degree section, flatten to a 10-degree section, and theremaining deck area is at zero degrees.By installing sloped sections at the feed end, materialbed depth is reduced since gravity will increase the travelspeed of the material. This reduced bed depth minimizesspillover, and enables fine particles to “stratify” throughthe coarser particles and onto the screening surfacemuch faster, where it can then find more opportunitiesto be passed through screen openings. This design alsoenables fines to be introduced to the bottom deck faster,which increases the bottom deck screening capacity, orbottom deck factor used in the VSMA screen calculation.They have also designed a punch plate section into thefeed plate itself, thereby increasing the total screeningarea of the top deck by an additional 10%. This punchplate will remove a high percentage of fine particlesbefore they are even introduced to the actual screen deck,thereby increasing production volumes.The coarse “near” size and “over” size particles that are notinitially separated on the middle and top decks graduallyslow down as the deck panels flatten out to the horizontalsection towards the discharge end of the screen. Thismaterial’s reduced travel speed, combined with the optimumangle of trajectory in relationship to the screenopening, provides a high screening efficiency upon whichoval motion horizontal screens have built their reputation.Screenin g163