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Volume 33 Issue 9
Jul.  2021
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Article Contents
KONG De-wen, ZHANG Jian-liang, LIN Xiang-hai, GONG Bi-xia, SU Bu-xin. Effects of natural minerals on the combustion characteristics of pulverized coal[J]. Chinese Journal of Engineering, 2011, 33(9): 1160-1165. doi: 10.13374/j.issn1001-053x.2011.09.018
Citation: KONG De-wen, ZHANG Jian-liang, LIN Xiang-hai, GONG Bi-xia, SU Bu-xin. Effects of natural minerals on the combustion characteristics of pulverized coal[J]. Chinese Journal of Engineering, 2011, 33(9): 1160-1165. doi: 10.13374/j.issn1001-053x.2011.09.018

Effects of natural minerals on the combustion characteristics of pulverized coal

doi: 10.13374/j.issn1001-053x.2011.09.018
  • Received Date: 2010-09-15
    Available Online: 2021-07-30
  • The effects of five natural-mineral additives on the combustion characteristics of anthracite were investigated with a synthetical thermal analyzer. The five natural-mineral additives are DG-dolomite, RF-humite, DR-humite, LL-limestone and calcite. Combustion characteristic parameters such as ignition temperature, maximum combustion rate, release property index and burn-out characteristic index were studied by thermo-gravimetric analysis, and the kinetics parameters of samples such as activation energy and frequency factor were also calculated. Experimental results show that DG-dolomite, RF-humite and DR-humite can promote the combustion of anthracite, decrease the ignition temperature, increase the release property index and burn-out characteristic index, and make the maximum rate of combustion move ahead the volatile matter combustion contemporaneously; nevertheless, LL-limestone and calcite have the opposite effect. Kinetics calculation results reveal that the addition of DG-dolomite, RF-humite and DR-humite decreases the activation energy by 10.4%, 14.5% and 10.7% respectively, and the decrease has a combustion-supporting effect in the combustion of blends. Adding LL-limestone and calcite increases the activation energy by 2.0% and 4.3% respectively, and the increase exhibits a fire-retardant effect in the combustion of blends.

     

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