Elutriation

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Related to Air classification: air classifier

elutriation

[ē‚lü·trē′ā·shən]
(chemical engineering)
The process of removing substances from a mixture through washing and decanting.
(engineering)
In a mixture, the separation of finer lighter particles from coarser heavier particles through a slow stream of fluid moving upward so that the lighter particles are carried with it.
(geology)
The washing away of the lighter or finer particles in a soil, especially by the action of raindrops.

Elutriation

 

(or clarification), the separation of slowly settling fine particles of a polydisperse suspension from rapidly settling larger and heavier particles by decanting a liquid containing the not yet settled particles from a settled precipitate.

Elutriation is a means of hydraulic classification of ground materials (with particle size from several tenths of a micron to several millimeters) that combines settling with décantation into consecutively linked settling basins (reservoirs, tanks, or chambers). The process is used to concentrate mineral raw materials, produce fine powders, and cleanse clays (particularly kaolin) of mechanical impurities (sand, mica, and feldspar).

References in periodicals archive ?
The delivery to Yamanaka in Japan would comprise a complete shredder plant and the necessary equipment for de-dusting, as well as equipment for air classification, magnet separation and conveying of the shredded material.
Additional addenda approved for public review include requirements related to condensate management, control of ventilation systems, and air classification with regard to contaminant and odor intensity.
The virtual pilot plant, based on the sequential processing involved in upgrading ASR, begins with the ASR sample and goes through the processes of screening, hammer mill, drying, screening, air classification, size reduction (cutting process) before finally ending up with the upgraded ASR.
Second, ESCO's sand reclamation is non-thermal, and utilizes only physical processes such as screening and air classification.
For this purpose, a classifier mill has been installed in the fine grinding and air classification section for milling normal bread flour to such a fineness that it can be fractionated, in the subsequent air classifier, into low protein coarse and high protein ultrafine fractions.
Fractionation of DDGS Using Sieving and Air Classification
The system utilizes a multi-pass process of mechanical agitation, centrifugal force and air classification.
Screening equipment, from trommels to vibrating screens to finger screens to disc screens, can facilitate further separation and sorting of mixed C&D material by sizing the material as it moves through the system, creating an overs line that is hand picked and an unders line that is separated into its constituent parts using automation in the form of magnets, air classification systems and sink tanks.