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国家自然科学基金(51104193)

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COREX炼铁工艺用煤的热解特性及气体生成规律被引量:3
2013年
采用热重质谱联用分析技术研究COREX炼铁工艺用煤的热解特性及热解气体产物的生成规律,并且结合COREX熔融气化炉炉内条件考察煤种、升温速率、CO气氛等因素对煤热解行为的影响。研究结果表明:兴隆庄煤和大同煤具有相似的热解特性及气体释放规律,其中煤阶较低的兴隆庄煤热解的质量变化速率大于大同煤。升温速率越大,煤热解的质量变化速率越大,然而对煤热解的最终质量分数影响不大;气体组分的释放速率随升温速率的增大而增大,并且最大释放速率所对应的温度向低温偏移;CO气氛使煤的热解最大质量变化速率降低,同时使二次裂解反应滞后。
朱丰张生富彭海军温良英白晨光邹冲
关键词:COREX工艺热解升温速率
Effects of Additives on Sulfur Transformation,Crystallite Structure and Properties of Coke during Coking of High-sulfur Coal被引量:2
2015年
High-sulfur coal, as an alternative coal source, has a relatively high proportion in coal reserves. However, the feature of high sulfur content, which can cause environmental pollution and poor quality of molten iron, restrains its utilization in coking industry. Coking experiments of high-sulfur coal with Fe2O3, La2O3 and CaO as additives were carried out in order to fix the sulfur in coke. The effects of additives on sulfur distribution, crystallite structure, surface morphology and properties of coke were investigated. The results indicate that CaO can be used as sulfur-fixing agent in coking process, and CaS is the main mineralogical phase of the sulfur-contained mineral constituents in coke. Fe2O3 and La2O3 facilitate the conversion of CaO to CaS. The additives mainly influence the crystallite height and the average interlayer spacing doo2 of coke. The addition of La2O3 increases the value of the crystallite height while the addition of CaO and Fe2O3 decreases it. CaO leads the pores of coke to increase with its physical action and agglomerating characteristic. Fe2O3 and C can form (Fe,C), resulting in the pulverization and erosion of the pore wall. La2O3 makes the coke surface become more compact and thinner. The reactivity of coke increases with the decrease of crystallite height and crystallite layer number.
Sheng-fu ZHANGLiang-ying WENKun WANGChong ZOUJian XU
关键词:COKE
煤层突出倾向与其孔隙结构的相关性研究
2013年
本文以沁水煤田的高瓦斯矿井为例,通过压汞法测量典型煤样的微观孔隙结构、孔容和孔比表面积在一定孔径范围内的分布规律,结合瓦斯的赋存、吸附和解吸释放机理来分析预测矿井的瓦斯突出危险性。
翟雷闫凯赵东
关键词:采矿工程煤与瓦斯突出孔隙结构细观研究
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