Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb Present participle of
overburn .
Etymologies
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Examples
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Shrinkage - overburning: - The porosity of the stone is reduced with a temperature increase above the calcination temperature or an extended firing time.
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If a choice in fuel does exist wood is preferable since on being fired it will produce steam which helps to cool the fire and hence avoid overburning to some extent.
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Smaller diameter stones however, make the flow of air through the kiln difficult resulting in a slow rising of the fire and possibly overburning.
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The skill of the operator lies in his ability to mix the necessary amount of air and oil, or steam and oil, so as to produce a flame of such a length and intensity as to fire the limestone column to the centre without overburning any part of it, and without choking up the pores of the limestone with soot due to too lean a mixture.
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Magnesian limes are slower in slaking than calcium limes due to the sintering caused by the overburning of the magnesium carbonate portion of the stone.
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The effect of impurities: Impurities cause slags to form around the surface of the stone which result in a reduction in porosity (overburning) at lower temperatures than would otherwise be the case.
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Thermocouples are an indirect method of quality control which serve to warn against overburning.
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Therefore, if a small stone is used the draught should be increased, by lengthening the kiln shaft or chimney, to avoid overburning.
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Ideally, the firing temperature should be set so as to minimize the firing time, i.e. maximize output, without reducing the quality of the lime produced, i.e. overburning it.
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It supports ISO 9660 images as well as ISO mode 1 and XA mode 2, and allows for on-the-fly disc recording in addition to overburning (if supported by hardware).
9down.com 2010
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