calcination

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Related to Calcinated: calcined limestone

calcination

(kăl'sənā`shən), in metallurgymetallurgy
, science and technology of metals and their alloys. Modern metallurgical research is concerned with the preparation of radioactive metals, with obtaining metals economically from low-grade ores, with obtaining and refining rare metals hitherto not used, and with the
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, process of heating solid material to drive off volatile chemically combined components, e.g., carbon dioxide. It is sometimes a step in the extraction of metals from ores. Calcination is distinguished from drying, in which mechanically held water is driven off by heating, and from roasting, in which a material is heated in the presence of air to oxidize impurities. Originally calcination meant the method of obtaining lime (calcium oxide) from limestone by heating it to drive off carbon dioxide.

calcination

[‚kal·sə′nā·shən]
(chemical engineering)
A process in which a material is heated to a temperature below its melting point to effect a thermal decomposition or a phase transition other than melting.
References in periodicals archive ?
Characteristic peaks of silica were observed in both synthesized MSN and calcinated MSN.
In addition to the initial penalizing minerals (muscovite, quartz and feldspars) presented in the kaolin, the presence of kaolinite that has not been fully calcinated (metakaolinized) was identified in the MK-750 metakaolin, due to the calcination at the lowest temperature (750[degrees]C).
The plot for the composite with calcinated reinforcement shows that the [d.
The actual meaning of the term is "burned or calcinated copper.
In addition calcinated films had good mechanical stability, as demonstrated by placing the films under physical stress (sonication).
100% conversion at 25[degrees]C (2011) (77[degrees]F) with catalyst calcinated at 200[degrees]C (392[degrees]F) and 300[degrees]C (572[degrees]F) Chen et al.
The XRD spectra of nBGC confirmed that the calcinated glass generally existed in amorphous state and no diffraction peaks could be observed except a broad band between 20 and 40[degrees] (29) [29] (Fig.
In the context of alchemical associations, the homa fire of the Tantrics yields the holy ash of sacred plants or bhasma (used to cover their bodies), which is also the bhasma of the alchemical rasayana of India (which is calcinated metals and herbs).
The river became muddy and narrow, and instead of a tangle of colossal trees that had astonished Florentino Ariza on his first voyage, there were calcinated flatlands stripped of entire forests that had been devoured by the boilers of the riverboats, and the debris of god forsaken villages whose streets remained flooded even in the cruellest droughts.
Nothing was beneath them except the ashes from which, arises the smell of asphalt and calcinated human flesh" (2002, 218).
The plant will use 425,000 tonnes of crude coke to produce 350,000 tonnes of calcinated coke per year.