著者

有馬 孝 愛澤 禎典 野村 誠治

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.100, no.2, pp.110-117, 2014 (Released:2014-01-31)

参考文献数

58

被引用文献数

3 5

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Coking coal necessary for cokemaking process is exhausted in progress; increasing the ratio of non- or slightly-coking coal is required. However, non-or-slightly coking coal causes a lot of structural defects in the coke lump and decreases coke strength because of its low dilatation and high shrinkage.For increasing the ratio of non- or slightly-coking coal, pre-treatment technology of coal such as the coal size control, increasing the coal bulk density and the rapid preheating reforming etc. have been developed and a new cokemaking process SCOPE21 that consists of those technologies have already started and high quality of coke is produced using over 50% of non- or slightly-coking coal. In addition, knowledge of coke structure formation mechanism and degradation mechanism of coke were remarkably developed.This paper reviews the past research on coal utilization technologies, carbonization mechanism and coke structure and degradation behavior of coke, and describes future direction of research and development for increasing the ratio of non- or slightly-coking coal.

著者

松尾 翔平 井川 大輔 宮本 幸典 齋藤 泰洋 松下 洋介 青木 秀之 野村 誠治 林崎 秀幸 宮下 重人

出版者

一般社団法人 日本エネルギー学会

雑誌

石炭科学会議発表論文集

巻号頁・発行日

vol.51, pp.14-15, 2014

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The fracture analyses for coke models reproducing the form of the non-adhesion grain boundaries were performed using the rigid bodies-spring model. The coke model was developed by the random arrangement of the coal particle polygons and expansion of the polygons based on experimental results. As a result, many springs at the gap or edge of the non-adhesion grain boundaries were fractured, and the arrangement and shape of the non-adhesion grain boundaries were supposed to affect the fracture of the coke. Furthermore, the coke with the larger blending ratio of the low-quality coal fractures with the weaker strength. This is because the number of the non-adhesion grain boundaries increases, and the size of the boundaries becomes larger and the shape of the boundaries becomes complex.

著者

野村 誠治 加藤 健次 前野 幸彦

出版者

一般社団法人日本エネルギー学会

雑誌

日本エネルギー学会誌 (ISSN:09168753)

巻号頁・発行日

vol.82, no.11, pp.866-873, 2003-11-20

被引用文献数

1

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Chlorine content of bituminous coal was determined and its behavior during carbonization was investigated. The chlorine content in the metallurgical coals used in this experiment was between 100 and 1,500 ppm. Most chlorine in coal and coke was removed by washing with water. CaO addition to coal increased the chlorine residue ratio in coke. The residue ratio of chlorine in coke increased with increasing Ca content in coal. This is considered because chlorine in coal is released as HCl, which is trapped in coke again in the form of CaCl_2 The chlorine residue ratio of coke produced in actual coke oven was higher than that of coke produced in laboratory scale tube furnace. This is considered because released gas from coal has more chances to contact with calcium in the actual coke oven than in the tube furnace. Furthermore the removal of chlorine from NaCl was promoted by co-carbonization of NaCl with coal. This implies that H_2O derived from coal decomposition may help chlorine to be released.