Relationship between ash content and R70 self-heating rate of Callide Coal

被引:51
作者
Beamish, BB [1 ]
Blazak, DG [1 ]
机构
[1] Univ Queensland, Sch Engn, St Lucia, Qld 4072, Australia
关键词
self-heating; coal; ash content; mineral matter; Callide; adiabatic;
D O I
10.1016/j.coal.2005.03.010
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 [动力工程及工程热物理]; 0820 [石油与天然气工程];
摘要
Borecore samples from the Trap Gully pit at Callide have been assessed using the R-70 self-heating test. The highest R-70 self-heating rate value was 16.22 degrees C/h, which is consistent with the subbituminous rank of the coal. R-70 decreases significantly with increasing mineral matter content, as defined by the ash content of the coal. This effect is due to the mineral matter in the coal acting as a heat sink. A trendline equation has been fitted to the borecore data from the Trap Gully pit: R-70 = 0.0029 x ash(2) - 0.4889 x ash + 20.644, where all parameters are on a dry-basis. This relationship can be used to model the self-heating hazard of the pit, both vertically and laterally. (c) 2005 Elsevier B.V All rights reserved.
引用
收藏
页码:126 / 132
页数:7
相关论文
共 11 条
[1]
[Anonymous], 1994, P 12 INT COAL PREPAR
[2]
[Anonymous], 1972, J MINE MET FUEL
[3]
Spontaneous-combustion propensity of New Zealand coals under adiabatic conditions [J].
Beamish, BB ;
Barakat, MA ;
St George, JD .
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2001, 45 (2-3) :217-224
[4]
Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects [J].
Beamish, BB ;
Barakat, MA ;
St George, JD .
THERMOCHIMICA ACTA, 2000, 362 (1-2) :79-87
[5]
BIGGS MS, 1995, SPECIAL PUBLICATION, V1, P471
[6]
HUMPHREYS D, 1981, P IGN EXPL FIR COAL
[7]
MOXON N. T., 1985, COAL PREP, V2, P91, DOI [10.1080/07349348508905157, DOI 10.1080/07349348508905157]
[8]
Adiabatic oxidation study on the propensity of pulverised coals to spontaneous combustion [J].
Ren, TX ;
Edwards, JS ;
Clarke, D .
FUEL, 1999, 78 (14) :1611-1620
[9]
SINGH RN, 1987, MIN SCI TECHNOL, V4, P155
[10]
SMITH AC, 1988, 9196 INV US BUR MINE