Screening Flashcards
Clear space between individual wires of the screen
Screen aperture
A 10 mesh screen will have a 10 openings per inch and the aperture will be…
0.1 inch minus the diameter of the wire
This refers to the treatment of a material containing a natural amount of moisture or a material that has been dried screening
Wet screening
In the Tyler standard sieve series, the other sizes vary by a fixed ratio of what?
Sqroot of 2
Suitable for small scale operation such as screening sand, gravel or coal
Stationary screens
Screens this group are usually from 1/2 inch to 60 mesh
Oscillating screens
These are box like machines either round or square with a series of screen cloths nested atop one another.
Gyratory screens
Speed of vibrated screens
1500 to 7200 vibrations/min
These are used for screening large sizes, particularly of 1 inch and over.
Grizzlies
The material passing one screening surface and retained on a subsequent surface is called.
Intermediate material
The removal of small amount of oversize from a feed which are predominantly fines is called
Scalping
Removal of free water from solids-water mixture and is generally limited to 4 mesh and above.
Dewatering
Another name for revolving screen
Trommel screen
The wire diameter of a 10 mesh screen whose aperture is 0.065 in is
0.035 in
Increasing the capacity of a screen,
Decreases the screen effectiveness
