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| Application of Brown Coal-Based Hyper Coal in Coal Blending for Coking |
| FAN Li-hua1, WANG Lei1,2,3, HOU Cai-xia1, YIN Jia-nan1, LIANG Ying-hua1 |
1. College of Chemical Engineering, Hebei United University, Tangshan, 063009
2. Wulanchabu ENN Coal Gasification Minning Technology Co., Wulanchabu 012000, Nei Mongol, China
3. State Key Laboratory of Coal-Based Low Carbon Energy, Hebei United University, Langfang, 065001, Hebei, China） |
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Abstract The hyper coal was high-temperature extracted under the condition of using N-methyl pyrrolidone and wash oil as the solvents respectively. The prepared hyper coal was characterized by means of FT-IR, 13C CP/MAS NMR and thermogravimetric analysis. Compared with the raw coal, hyper coal had lower oxygen content and higher heat value with N-methyl pyrrolidone or wash oil as solvent and more aromatic components with wash oil as solvent. Hyper coal can be applied in coal blending for coking. When it was added with the proportion of 10%, the softening point decreased by 70 -80 ℃, and the plasticity range of paste increased. The coke reactivity decreased about 1 percentage point, and the post-reaction strength was increased about 3.6 percentage points.
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Received: 24 March 2014
Published: 02 November 2014
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2014, Vol. 49 
