中南大学学报（自然科学版）2016，Vol.47Issue(12)：3970-3975,6.DOI:10.11817/j.issn.1672-7207.2016.12.001
型焦煤沥青粘结性能的强化
Intensification cohesiveness of coal tar pitch used in formed coke
摘要
Abstract
Coal tar pitch is the most effective binder for the production metallurgical formed coke. In order to improve the strength of the briquettes, the additives of BJ and ultra-fine coke and the pitch refining were adopted to intensify the pitch cohesiveness. Moreover, the intensified mechanism was analyzed. The results show that BJ can intensify the cohesiveness of the pitch and make the strength of the wet briquettes, and the carbonized briquettes significantly improve. After added BJ, the state of the pitch changes from solid particle to colloid and the bond mode transforms from solid phase to liquid phase, which indicates the pitch adheres around the coke particles and bonds them to a firm briquette. The pitch refining reduces the large holes of the briquettes. And after co-grinding, the ultra-fine cokes fill the pores produced by heat volatilization of the pitch and carbonize with the pitch to intensify the carbonized skeleton. When co-grinded 12%coke with average diameter of 8.6μm and 2.0%BJ are added in the pitch, the cohesiveness of the pitch is intensified and the strength is improved after refined the pitch to less than 0.15 mm.关键词
型焦/煤沥青/强化/超细焦粉/粘结性能Key words
formed coke/coal tar pitch/intensification/ultra-fine coke/cohesiveness分类
矿业与冶金引用本文复制引用
钟强,杨永斌,李骞,姜涛,戈捷..型焦煤沥青粘结性能的强化[J].中南大学学报（自然科学版）,2016,47(12):3970-3975,6.基金项目
国家自然科学基金资助项目(51234008，51574284)(Projects(51234008,51574284) supported by the National Natural Science Foundation of China) （51234008，51574284）
