Effect of HPC (Hyper-coal) on Strength of Ferro-coke during Caking Temperature
Effect of HPC (Hyper-coal) on Strength of Ferro-coke during Caking Temperature
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DOI：
10.2355/isijinternational.isijint-2017-130
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发表时间：
2017-01-01
影响因子：
1.8
通讯作者：
Hamaguchi, Maki
中科院分区：
文献类型：
--
作者：
Uchida, Ataru;Yamazaki, Yoshiaki;Hamaguchi, Maki
研究了铁氧化物对高性能煤（HPC）在炭化过程中对煤粒粘附性的影响。通过X射线衍射分析，研究了添加氧化铁的高性能混凝土在粘结过程中氧化铁晶体结构的变化。通过热重分析和气相色谱仪和卡尔·费休滴定仪的气体浓度从重量损失计算出在结块温度期间由氧化铁促进的HPC的重量损失。此外，为了揭示铁氧化物对再固化温度下煤粒粘附性的影响，测定了添加和不添加HPC/高流动性HPC（HF-HPC）/Fe 2 O3/Fe 3 O 4的半焦的产率，采用径向压缩试验评价了半焦样品的强度，并采用显微结构分析评价了煤粒粘附性。结果表明，Fe_2 O_3的催化作用使HPC的热塑性失重增加，而Fe_2 O_3还原为Fe_3 O_4时，HPC热塑性组分中的氢原子使HPC的热塑性失重降低。因此，加入HPC后半焦的强度有所提高。此外，虽然氧化铁对高性能混凝土有一定的影响，但高性能混凝土能提高表征焦炭强度的煤粒膨胀率，且HF-HPC的膨胀率高于高性能混凝土。因此，HPC降低了氧化铁的化学作用，提高了水泥的抗裂性能。
The effect of HPC (Hyper-coal), which was affected by the iron oxide, on coal particle adhesion during carbonization was investigated. X-ray diffraction analyses were carried out to obtain changes of iron oxide crystal structure on HPC with iron oxide addition during caking temperature. The promoted weight loss of HPC by the iron oxide during caking temperature was calculated from the weight losses by thermogravimetric analyses and gas concentrations by a gas chromatograph and a Karl Fischer titrator. Furthermore, to reveal the effect of iron oxide on coal particle adhesion at resolidification temperature, the yields of semi-coke with and without HPC/High Fluidity-HPC (HF-HPC)/Fe2O3/Fe3O4 were measured, the strength of the semi-coke samples was evaluated using diametral compression tests, and the adhesion of coal particles was evaluated using microstructure analyses. As a result, the promoted weight loss of HPC was increased by the catalysis of Fe2O3, and was decreased, when the Fe2O3 was reduced to Fe3O4, due to hydrogen atoms in the thermoplastic components of HPC. Thus, the strength of semi-coke with HPC increased. Furthermore, although the iron oxide affected the HPC, the adhesiveness of coal particles, which was an index of ferro-coke strength, was enhanced by HPC, and the adhesiveness of HF-HPC was higher than that of HPC. Therefore, the HPC decreased the chemical effect of iron oxide, and improved the adhesiveness.