Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects
Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects
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DOI：
10.1016/s0040-6031(00)00588-8
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发表时间：
2000-11-13
影响因子：
3.5
通讯作者：
St George, JD
中科院分区：
文献类型：
--
作者：
Beamish, BB;Barakat, MA;St George, JD
用新西兰煤评价了一种测定煤自热倾向的绝热试验方法。通过该方法获得的自加热速率（R-70）的重复性小于连续3-4天进行的检测的平均值的+/-5%。对于较长的时间段，即使使用受控储存下的样品，由于预氧化效应，自加热速率值也显著降低。这种预氧化作用可以用公式R-70（t）= at（B）来描述，其中t是以天为单位的时间，B是取决于储存方法和粒度的常数，a是新鲜煤的R-70值。当储存的样品用于分析时，这种关系的知识可用于通过随时间进行重复测试来推断新煤的R-70值。(C)2000 Elsevier Science B. V.保留所有权利。
An adiabatic testing procedure for determining the self-heating propensity of coal has been evaluated using New Zealand coals. Repeatability of the self-heating rate (R-70), Obtained by the method, is less than +/-5% of the average value for tests performed consecutively over 3-4 days. For longer time periods, even using samples under controlled storage, the self-heating rate value decreases noticeably due to pre-oxidation effects. This pre-oxidation effect can be described by the equation R-70(t) = at(b), where t is the time in days, b a constant dependent on storage method and particle size and a the R-70 value of fresh coal. When stored samples are used for analysis, knowledge of this relationship can be used to extrapolate a fresh coal R-70 value by doing repeated tests over time. (C) 2000 Elsevier Science B.V. All rights reserved.