抄録
In order to produce good-quality cokes from coal blends containing low-quality coals as much as possible, thermoplasticity of various coal blends of coking coals with slightly- or non-coking coals was investigated using dynamic viscoelastic techniques. The overlapping of thermoplastic temperature range as well as the increased thermoplasticity of each coal is important for an enhancement in thermoplasticity of the coal blends. For the coal blends with different thermoplastic temperature ranges, the improvement of thermoplasticity was not observed. HyperCoal (coal extract) was tried as a thermoplasticity accelerator for coal blending. HyperCoal is an ashless coal produced by thermal extraction, and the thermoplastic temperature range was significantly wide, in addition to the high thermoplasticity itself. When the HyperCoals produced from low-quality coals were mixed with coal blends, a significant improvement of thermoplasticity for the coal blends was found.
