DOC《粉状石油焦造球煅烧试验研究》

粉状石油焦造球煅烧试验研究 (张念炳1,2,胡素丽3,刘卫1,2,黎志英3 (1.

贵州师范大学 材料与建筑工程学院,贵阳 550014;

2.贵州省铝电解炭素材料工程技术研究中心,贵阳 550001;

3.贵州大学 材料与冶金学院,贵阳 550003)) 摘要:粉状石油焦造球后,研究了煅烧条件对煅后焦实收率和真密度的影响.结果表明,粉状石油焦造球可提高煅后焦的实收率和真密度,降低煅烧损耗,改善煅后焦质量;

升温速率、煅烧温度和煅烧时间均对煅后焦实收率和真密度有影响,可通过控制煅烧条件来降低生产成本,改善煅后焦的质量. 关键词:粉状石油焦;

造球;

煅烧;

实收率;

真密度 中图分类号:TF821 文献标识码:A 文章编号:1007-7545(2012)09-0000-00 Calcination Test of Powdered Petroleum Coke after Pelletizing ZHANG Nian-bing1,2, HU Su-li3, LIU Wei1,2, LI Zhi-ying3 (1. College of Material and Civil Engineering, Guizhou Normal University, Guiyang 550001, China;

2. Guizhou Engineering Research Center for Carbon Materials of Aluminum Electrolytic, Guiyang 550001, China;

3. The Materials and Metallurgical College, Guizhou University, Guiyang 550003, China) Abstract: Powdered petroleum coke was pelletized, and the effect of calcination conditions on the recovery efficiency and true density of calcined coke was investigated. The results show that pelletizing can improve the recovery efficiency and true density of calcined coke, reduce the calcination loss, and improve the quality of calcined coke. Heating rate, calcination temperature and calcination time can affect the recovery efficiency and true density of calcined coke. The production cost can be reduced and the quality of calcined coke can be improved by controlling the calcination conditions. Key words: powdered petroleum coke;

pelletizing;

calcination;

recovery efficiency;

true density 煅烧石油焦是铝电解炭阳极生产的主要大宗原材料,随着炼油工艺的强化,石油焦粉化严重[1-2],粉状焦比例日益增高.我国铝电解企业预焙阳极生产大都采用回转窑煅烧工艺[3].在回转窑煅烧过程中,大量的粉焦被烧损或被气流带走,导致煅烧实收率低、原料消耗增加、生产成本增加;

大量焦粉在沉灰室燃烧,使回转窑减料运行、沉灰室温度偏高、隔墙烧塌;

粉焦停留在回转窑最下层,煅烧温度低,煅后焦真密度较低;

粉焦量过大,已严重影响到阳极煅烧、配料、焙烧等生产工艺,导致阳极氧化、裂纹、掉块,使阳极产品质量下降.本文针对国内石油焦粉化日趋严重和回转窑煅烧烧损过高的现状,开展造球对粉状石油焦煅烧的影响以及煅烧条件对煅后焦实收率和真密度的影响研究,为粉状石油焦的工业应用提供参考.

1 试验准备 试验所用粉状石油焦取至贵州某厂,含水率8.2%,其粒度分布为:1~0.5 mm占32.5%、0.5~0.25 mm占26.78%、