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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 It might be outdated or ideologically biased.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 ?
El-Moghazy said, in press statements Saturday, that based on this information and the new technical study, Egypt will determine its final decision over the number of sluices required to ensure the flow of the Nile water downstream to Egypt and Sudan.
Professor of Water Resources at the Faculty of Agriculture at Cairo University, Nader Nour El-Din, told Daily News Egypt there is no technical study over the sluices; rather it was simply a "weak proposal", rather than a study.
The real quandary, according to Nour El-Din, is that the sluices can be stopped if Addis Ababa is unable to export electricity, which would in turn majorly affect water flow.
The other sluice will be adjusted soon, and it will be opened to test it, but not at the same time as the first.
The cast-iron sluice gates are 24 inches by 24 inches.
It turned up a total of 165 sluices (3) identified by computerized means but not so categorized.
To verify this assumption, I proceed incrementally, first noting the number of violations of structural identity (sprouting) against the total number of sluices in my corpus.
Given that sluices occur almost four times as often in the translated texts as in the authentic ones, the Latin option seems more plausible.
3 CUT the discharge end of each sluice at about a 30-degree angle with a hacksaw.
(You'll get the idea after the first one.) Lift the sluice to its approximate level to determine the correct crossing point for the second stake.
If you already have a pond in your yard, you can use it as the catch basin for the sluice. If not, you'll need to either install a small pond liner (about $30 at garden or home centers) or use an above-ground basin like a whiskey barrel or even a livestock trough.