calcination – מילון אנגלי-אנגלי
calcination
n.
process of reducing a substance to a powdery consistency by the application of a high heat
Calcination
Authorities differ on the meaning of
Calcination (also referred to as
calcining). The IUPAC defines it as 'Heating to high temperatures in air or oxygen'. However
calcination is also used to mean a thermal treatment process in the absence or limited supply of air or oxygen applied to
ores and other solid materials to bring about a
thermal decomposition,
phase transition, or removal of a volatile fraction. The calcination process normally takes place at temperatures below the
melting point of the product materials. Calcination is not the same process as
roasting. In roasting, more complex gas–solid reactions take place between the furnace atmosphere and the solids. Calcination takes place inside equipment called calciners. A calciner is a steel cylinder that rotates inside a heated furnace and performs indirect high-temperature processing (1000-2100 °F) within a controlled atmosphere.
calcination
Noun
1. the conversion of metals into their oxides as a result of heating to a high temperature
(hypernym) oxidation, oxidization, oxidisation
(derivation) calcine
calcination
nf.
calcination, calceolaria
Calcination
(n.)
The act or process of reducing a metal to an oxide or metallic calx; oxidation.
(n.)
The act or process of disintegrating a substance, or rendering it friable by the action of heat, esp. by the expulsion of some volatile matter, as when carbonic and acid is expelled from carbonate of calcium in the burning of limestone in order to make lime.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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