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Formed Coking Through The Copreheattreatment With Additive

添加剂共预热形成焦化

基本信息

批准号：
59850141
负责人：
MOCHIDA Isao
金额：
$ 5.12万
依托单位：
Research Institute of Industrial Science, Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1984
资助国家：
日本
起止时间：
1984 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59850141/
关键词：
Anisotropy Formed Coking Blustfurnace Coke Copreheattreatment Coal 石炭熱間強度

项目摘要

The co-preheattreatment of non-fusible and slightly fusible coals with A240 and hydrogenated A240 under high temperature-short contact-time conditions around 500 ゜C has been examined in an attempt to produce a formed coke with better anisotropic development. These conditions shortened the copreheat-treatment time and provided better anisotropic development in the resultant coke after carbonization. Effectiveness of short contact-time has been examined interms of the extent of depolymerization of coal molecules suitable for anisotropic development, this being related to coal liquefaction under similar conditions.The carbonization properties of weathered bituminous coals were compared with those of the non-weathered coals. The weathering decreased the fusibility of the coal to leave more basic anisotropy and to diminish the size of the majority of the anisotropy in the resulting coke. On the other hand, more domain and flow domain textures developed. Co-carbonization with a petroleum pitch additive was found effective enhancing the fusibility of the coal and anisotropic development in the coke. Formed coking of the weathered coal by means of copreheat-treatment with the additive, provided an anisotropic, dense and strong coke of uniform size. For the weathered coal, the optimum copreheat-treat-ment was shorter than that using the non-weathered coal, indicating high coking reactivity of the weathered coal. The transferable hydrogens from the additive are rapidly consumed by the oxygen containing groups of the weathered coal.

研究了不熔煤和微熔煤与A240和氢化A240在500 ℃左右高温短时接触条件下的共预热处理，以生产各向异性发展较好的型焦。这些条件缩短了焦炭的预热处理时间，并在碳化后提供了更好的各向异性发展。从煤分子解聚程度的角度考察了短接触时间的有效性，这与煤在类似条件下的液化有关，并比较了风化烟煤与非风化煤的炭化性能。风化降低了煤的熔融性，留下更多的基本各向异性，并减少了所得焦炭中大部分各向异性的大小。另一方面，更多的域和流域纹理的发展。与石油沥青添加剂的共炭化被发现有效地提高了煤的熔融性和焦炭的各向异性发展。风化煤在添加剂作用下进行炼焦，可得到各向异性、致密、强度均匀的焦炭。风化煤的最佳炼焦热处理时间短于非风化煤，说明风化煤具有较高的炼焦活性。添加剂中可转移的氢被风化煤中的含氧基团迅速消耗。