Clinker

clinker

the ash and partially fused residues from a coal-fired furnace or fire

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 It might be outdated or ideologically biased.

Clinker

 

the solid, sintered residue obtained after subjecting certain by-products of metallurgical production (for example, cakes, zinc-retort residues, or slags) and other zinc-containing products to the Waelz process.

The composition of the clinker depends on the composition of the original raw material. For example, clinker obtained by subjecting zinc cakes to the Waelz process contains 2.5–3 percent zinc, 1–3 percent lead, 1–3 percent copper, 10 g per ton gold, about 50 g per ton silver, 35–40 percent iron, and 20–30 percent carbon; the balance contains SiO₂, CaO, and several other oxides. Clinker is an intermediate product of zinc manufacture. In copper or lead manufacture, copper, lead, and other valuable component elements are extracted by subsequent pyrometallurgical treatments. To separate copper concentrated in the magnetic clinker fraction, it is sometimes advisable to pulverize the clinker and to follow this step with magnetic separation.

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Clinker

 

clay articles, usually brick-shaped, that are fired until they are completely sintered.

Clinker, made of highly plastic clays, is grouped with the stone-ceramic materials. It is used in paving highways, in facing hydraulic engineering structures, socles, and the facades of buildings, and in lining reservoirs in chemical manufacturing. The technology of clinkering is analogous to that of brick manufacture. A semifinished product of cement production that consists of a sintered mixture of limestone and clay (or slag) is also called clinker.

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

clinker

[′kliŋ·kər]

(geology)

Burnt or vitrified stony material, as ejected by a volcano or formed in a furnace.

(materials)

An overburned brick.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

clinker

1. A partially fused product of a kiln, which is ground for use in cement; also called cement clinker.

2. A vitrified or partially vitrified residue of coal which has been burnt in a furnace; used as an aggregate in cinder block.

3. A clinker brick.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.