The results of measuring the heat conductivity of deposits sample from the heating surfaces of var- ious types of boilers burning Kansk-Achinsk coals are presented. A universal curve showing the heat conduc- tivity of the deposits as a function of their SO_3 content was constructed on the basis of measurement data; regions are singled out that are typical for four kinds of deposits: loose, sulfate-bonded, slag, and ferrous.
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