Glossary to Industrial Screening
Metal edge used to stretch and/or to fasten the screen section.
Successive bends in a wire which result from preforming or weaving.
Material supplied to a screen for a screening process.
Particles smaller than a specified size.
For vibrating screens, the number of oscillations made by the screen per unit of time, expressed in hertz (Hz).
Rugged screen comprising fixed or moving bars, discs, or shaped tumblers or rollers, normally used for screening comparatively large particles, e. g. greater than100 mm.
Screen used to prevent the entry into a machine of coarse particles which might interfere with its operation.
Vibrating screen with a motion which is substantially in a straight line in the vertical plane, normally installed horizontally, but may be inclined up to 8°.
high speed screen
Inclined screen, with a rectilinear or circular oscillating motion, normally operated at a frequency greater than 20 Hz.
The fabrication on the edges of a screen section for holding or tensioning purposes.
inherent moisture; contained moisture
Liquid, usually water, held within a sample of a material, normally expressed as a percentage of the sample mass.
Vibrating screen with a rectilinear or circular oscillating motion, normally installed at an angle between 10° and 36°.
Number of apertures per unit of linear measure in a woven wire cloth or wire screen.
The particle size used to describe a product of a sizing operation.
near-sized material; near mesh material
Particles approximat ing in size to the aperture size of the screening surface.
That portion of the feed discharged from the screening surface without having passed through the apertures.
Screened product of a size greater than a specified size.
particle (deprecated: grain)
Discrete element of the material to be screened regardless of its size.
particle size; sieve size of a particle
Smallest sieve aperture through which a particle will pass if pre sented in the most favourable attitude.
per cent solids
Ratio of dry solids to the total solid-liquid mixture of material, expressed as a percentage by mass.
percentage open area
For woven wire cloth and wire screens, the ratio of the total area of the apertures to the total area of the cloth or the screen.
Weave in which every warp wire crosses alternately above and below every weft wire and vice versa.
The condition where particles wedge in the screen appertures.
Distance between corresponding points of two adjacent apertures in a woven wire cloth, a wire screen or a perforated plate.
In general, the mate rial resulting from any operation. In particular, the final material produced from a series of operations; e. g. screened product, finished product,etc
relative density (deprecated: specific gravity)
Ratio of the mass in air of a solid particle of a given volume to the mass of an equal volume of water.
Screen with a period of oscillation close to the natural period of oscillation of the resilient mounting.
Screen, mounted above another screen, with apertures normally at least twice the size of those in the lower deck, used to reduce the load and wear of the lower screening surface.
reciprocating screen; jig ging screen
Screen or pair of screens to which a combined horizontal and vertical motion is imparted by a crank shaft and connecting rods, the screen ing surfaces being horizontal or in clined at a small angle.
revolving screen; trommel
Screen in which the screening surface is formed into a cylinder or frustum of a cone, mounted on a horizontal or near horizontal rotating shaft or on revolving rollers. The material to be screened is fed into the interior of the revolving screen.
Removal by spraying, usually with water, of fine or foreign material present among or adhering to larger particles.
type of weave
The way in which warp and weft wires cross each other.
Weave in which every warp wire crosses alternately above and below every second weft wire and vice versa.
undersize control screen; breakage screen
Screen used for the removal of undesirable undersize from a material.
That portion of the feed which has passed through the apertures of a screening surface.
Screened product of a size smaller than a specified size.
Screen oscillated either by mechanical or by electrical means.
woven wire cloth; wire screen
Screening surface, produced by a wire weaving process or by pressure-welding of two layers of parallel wires. The wires form square or rectangular apertures of uniform size. They may be precrimped before weaving.
Diameter of the wire for a woven wire cloth, as measured before weaving.
All wires running length wise of the cloth as woven.
All wires running crosswise of the cloth as woven.
Screening with the aid of a liquid, usually in the form of a spray.