煤灰/K2CO3/Fe2O3对脱矿无烟煤燃点与燃烧速率的影响

张书; 陈宗定; 陈绪军; 公旭中

煤灰/K₂CO₃/Fe₂O₃对脱矿无烟煤燃点与燃烧速率的影响

1.
中国矿业大学(北京) 化学与环境工程学院, 北京 100083;
2.
中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室, 北京 100190

基金项目: National Nature Science Foundation of China (51004090)

详细信息

中图分类号: TQ534
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出版历程
- 收稿日期: 2013-10-09
- 修回日期: 2013-12-13
- 刊出日期: 2014-02-28

Effects of ash/K₂CO₃/Fe₂O₃ on ignition temperature and combustion rate of demineralized anthracite

1.
School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
2.
National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Funds: National Nature Science Foundation of China (51004090)

摘要

摘要: 考察了煤灰/K₂CO₃/Fe₂O₃及其之间的相互作用对酸洗无烟煤燃点和燃烧速率的影响。不同温度下制备的煤灰显示了不一样的性质（如化学组成、颜色和形貌）。脱矿无烟煤（负载和非负载催化剂）的燃烧反应性测试在热重分析仪（TG-DTG）中完成，结果表明，煤灰本身对酸洗无烟煤的燃点几乎没有影响，而高温下制备的煤灰能够明显提高酸洗无烟煤的燃烧速率。当煤灰和K₂CO₃ 或者Fe₂O₃的混合物加入酸洗无烟煤中作为燃烧催化剂时，可以看出与单独使用K₂CO₃ 或 Fe₂O₃相比，煤灰的加入明显导致酸洗煤的燃烧速率下降，而对其燃点影响不大。同样，K₂CO₃ 和 Fe₂O₃之间的相互作用也能够对酸洗无烟煤的燃烧速率产生负面影响。
- 煤灰 /
- 催化剂 /
- K₂CO₃/Fe₂O₃ /
- 燃点 /
- 燃烧速率
Abstract: The effects of ash/K₂CO₃/Fe₂O₃ and their interactions on the ignition temperature and combustion rate of acid-washed anthracite were examined. The coal ashes from combustion of anthracite at different temperatures showed very different properties such as chemical compositions, color and morphology. Reactivities of demineralized anthracite with and without catalysts were measured by thermo-gravimetric analyzer (TG-DTG). The results indicate that ash itself has no catalytic effects on ignition temperature while the combustion rate is improved, especially by the ash prepared at high temperatures. The use of ash with K₂CO₃ (or Fe₂O₃) together as combustion catalysts reveals that the interactions (i.e. sintering reactions) between them have caused the reduction in combustion rate, compared with the cases when K₂CO₃ or Fe₂O₃ was employed individually. Similarly, the synergistic effect between K₂CO₃ and Fe₂O₃ was also observed to lower the combustion rate of demineralized anthracite.
- ash /
- catalyst /
- K₂CO₃/Fe₂O₃ /
- ignition temperature /
- combustion rate

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