Screen revolving cylindrical

Revolving cylindrical screens rotate at 15-20 rpm and below the critical velocity they are suitable for wet or dry screening in the range of 10-60 mm. 

Revolving screens inclined, cylindrical screens, rotated at low speeds (10-20 rpm). Used for the wet screening of relatively coarse material, but have now been largely replaced by vibrating screens. 

Size separation of particles. Use a grizzly of spaced, inclined, vibrated parallel bars to remove large particles greater than 2 inches in diameter. Use a revolving cylindrical perforated screen to remove intermediate-size particles in the size range of 0.25 inch to 1.5 inches in diameter. Use flat, inclined woven screens (U.S. standard) that are vibrated, shaken, or impacted with bouncing balls to separate small particles in the size range of 3 to 80 mesh. Use an air classifier to separate fine particles smaller than 80 mesh. 

Revolving screen Inclined trommel, scrubber, or barrel cylindrical, rotating wire cloth, and perforated plate 15-20 rpm open at ends Scrub, wash, rough size placer mining low capacity and efficiency... 

---