分别以N-甲基吡咯烷酮和洗油为溶剂，对褐煤进行高温萃取制备无灰煤，并采用傅里叶红外光谱、固态13C核磁和热重法等手段对无灰煤进行表征。无灰煤较原料煤的氧含量降低，热值增加，含有大量的芳香族结构。无灰煤可以应用于配煤炼焦，当配入质量分数为10%时，可使混煤软化点降低70～80℃，塑性区间增大，并使所成焦炭反应性降低约1个百分点，反应后强度增加3.6个百分点。
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 thermo-gravimetric 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 ap-plied 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-re-action strength was increased about 3.6 percentage points.
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