焦炭与CO<sub>2</sub>和水蒸气气化后孔隙结构和高温抗压强度研究

郭文涛; 王静松; 佘雪峰; 薛庆国; 郭占成

焦炭与CO₂和水蒸气气化后孔隙结构和高温抗压强度研究

北京科技大学钢铁冶金新技术国家重点实验室, 北京 100083

基金项目: 国家自然科学基金重点项目(51234001);国家自然科学基金委员会与宝钢集团有限公司联合资助项目(51134008)。

详细信息

通讯作者:
薛庆国,Tel:010-62332208,E-mail:xueqingguo@ustb.edu.cn。

中图分类号: TF526⁺.1
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- 被引次数: 0
出版历程
- 收稿日期: 2014-12-24
- 修回日期: 2015-03-10
- 刊出日期: 2015-06-30

Pore structure and high-temperature compressive strength of gasified coke with CO₂ and steam

State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 通过焦炭气化反应装置和高温抗压强度测定装置,研究了焦炭与CO₂和水蒸气气化后孔隙结构变化规律及溶损率、温度和孔隙结构对焦炭高温抗压强度的影响。结果表明,与CO₂气化相比,水蒸气气化后焦炭平均孔径较小,比表面积和100 μm以下气孔数量增加,且整体高温抗压强度更高。焦炭气化后高温抗压强度随溶损率增加而降低,随温度升高而降低。温度为1 200 ℃时,随溶损率增加压缩过程焦炭承受压缩功(WOC_u)逐渐降低,水蒸气气化后的WOC_u高于CO₂条件,随溶损率增加焦炭压缩过程形变量呈降低趋势。在相同溶损率下,水蒸气气化后焦炭的孔隙结构对焦炭强度损害相对较小,抗变形能力更强。
- 焦炭 /
- 溶损率 /
- 孔隙结构 /
- 高温 /
- 抗压强度
Abstract: By using a coke gasification reaction device and an online measurement apparatus of high-temperature compressive strength, the variation of pore structures of coke after gasification with CO₂ and steam was investigated. In addition, the influences of solution loss rate, temperature and pore structure on the high-temperature compressive strength of coke were also studied. The results show that compared with that in CO₂ gasification, the average pore diameter of coke becomes smaller, and the specific surface and the quantity of pore under 100 μm increase in steam gasification. Meanwhile, the global high-temperature compressive strength becomes higher. After reacting with CO₂ and steam, the high-temperature compressive strength of coke will decrease with the increasing of solution loss or temperature. When the coke is gasified at 1 200 ℃, its work(WOC_u) during deforming process will decrease gradually with solution loss. The work(WOC_u) is higher for steam gasified coke than that for CO₂ gasified coke. The deformation shows a trend of decrease with solution loss. At the same solution loss, compared with that after CO₂ gasification, the damage of pore structure variation to the coke strength after gasification with steam is relatively smaller and the deformation resistance is stronger.
- coke /
- solution loss rate /
- pore structure /
- high-temperature /
- compressive strength

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