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calcination |
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calcination (kăl'sənā`shən), in metallurgy metallurgy (mĕt`əlûr'jē), science and technology of metals and their alloys . ..... Click the link for more information. , 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Pigments are manufactured by calcining an intimate mixture of metal oxides at temperatures from 800[degrees] C to 1300[degrees]C. With the kiln being heated with two different fuels--producer gas and oil--it is critical to identify the impact of each fuel on the calcining process. In operation: The sand feeds into the calcining chamber and is elevated to a temperature of 1300F (704C) using an indirect firing method that allows for lower operating temperatures. |
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calcining
