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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 It might be outdated or ideologically biased.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 ?
5) Would fish diverted into the gatewell readily find the submerged orifices and pass into the ice and trash sluiceway? (OPE), and
They want to be able to gape in pride and awe as giant turbine shafts spin clean power off spilling sluiceways. They want to tame the murderous river dragon once and for all.
Giza Governorate has agreed to dig a number of wells as an alternative watering choice for those farmlands that have depended on the sluiceway, according to the statement.
Krevosky's team put a second bridge made from an old telephone pole cut in half for easy crossing of a muddy section of the sluiceway.
To make what seems to be a necessary project more affordable, Department of Public Works Director John McGarry and the Pond and Lakes Commission are considering a phased-in project with the most crucial piece first - repairing the sluiceway.
OXFORD - When one local man started digging in his front yard, he uncovered buried treasure in the form of a 19th-century mill foundation and sluiceway.
The former woolen mill was once powered by water, and water from the pond flows directly through the building via a sluiceway.
"But that sluiceway was not at the point we thought it was at," he said.
The concrete work on the dam appears to be mainly cosmetic and was done primarily in the sluiceway area.