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1. a channel that carries a rapid current of water, esp one that has a sluicegate to control the flow
2. the body of water controlled by a sluicegate
3. See sluicegate
4. an artificial channel through which logs can be floated
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in ore dressing, an inclined, rectangular trough, usually with a rough bottom of napped fabric covered with a pattern of wood planks, corrugated rubber, or the like, designed for gravity concentration of minerals. As the pulp passes through the sluice, the particles separate into layers according to their density and grain size; the heavier minerals settle to the bottom and are held by the friction created by the roughness and the bottom pattern. The vortices that form promote selective concentration. After the material has accumulated, the sluice is rinsed out by washing the concentrate into a separate receptacle with a powerful stream of water.

A distinction is made between fixed and band-type sluices. Fixed hydraulic sluices are designed to process large amounts of material. They are made of from six to eight consecutively laid boards several meters long with a slope of 0.03–0.06. They can extract 70–80 percent of the tin from ore concentrates containing 15–30 percent SnO2; the extraction of gold is 40–60 percent. Other sluicing devices, cradles, and trommels are used for processing crude concentrates.

Band-type sluices consist of a continuous rubberized band, the upper part of which moves against the stream of pulp. The lighter fraction is unloaded in the lower section, and the heavier fraction is washed from the upper section of the band by a sprinkler. A band-type sluice 3 m long and 1.5 m wide has a productivity of 5 cu m/hr and can extract 92–95 percent of the gold in an ore.

Automatic multideck movable sluices have been in use since the 1970’s. The type used in the USSR has five decks arranged in parallel above one another in tiers. The feed is stopped automatically every 4 min, the decks are tipped to an angle of 45°, and a petcock is opened for 1 min for rinsing. The use of vibration in sluices increases productivity.


Spravochnikpo obogashcheniiu rud, vol. 2, part 1. Moscow, 1974.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


(civil engineering)
A passage fitted with a vertical sliding gate or valve to regulate the flow of water in a channel or lock.
A body of water retained by a floodgate.
A channel serving to drain surplus water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The bell was intended as a memorial to the first Vicar of Seaton Sluice, the Reverend Canon WE Jackson, who died in 1931.
POUR LOSER Lee Goddard admitted opening sluice gate
On Sunday, the Bangkok Metropolitan Administration agreed to raise the sluice gate up to 0.8 meter, but the flooded upstream communities demanded more.
Replacement of the two sluices by underwater divers will cost $367,491, according to Konstantin Eliadi, director of the Worcester's water and sewer operations.
Separation of inter-sentential (non-embedded) sluices from intra-sentential (embedded) ones reflects an intuition that the latter are more straightforwardly accounted for when all one has are syntactic tools.
Graham Primrose, 44, a former sluice keeper at the dam, saw a group of youths running from the site, spotted the vandalism and alerted Scottish Water.
3 CUT the discharge end of each sluice at about a 30-degree angle with a hacksaw.
Vicar of Seaton Sluice, the Reverend David Bowler, said: "Of course it's sad to have to part company with a bell that's been part of the village for over half a century, but we have to take our engineer's advice and look to the future of the church building as a whole.
Stafford says: "Seaton Sluice remains a fascinating place for anyone interested in our maritime history and much more could be learned by an archaeological survey of the harbour area."
Our resident's group was established in November 2006 and we help all residents and visitors of Seaton Sluice and Old Hartley.
Four fire engines were called to West Terrace, in Seaton Sluice, just after 11am to put out the fire, which had broken out in a shed next to the boat yard.