焦炭反应性与反应后强度的关系及其影响因素探讨

为了很好地预测焦炭在高炉中的反应行为,对大量的焦炭进行了检测及数据的分析,说明焦炭反应性与反应后强度之间有良好的负相关性;对焦炭冷态强度与热态性能之间进行了对比,建议焦化企业在保证焦炭的冷态强度合格的同时,更要关注焦炭的热态性能指标;对影响焦炭反应性与反应后强度的反应温度、碱金属、钝化剂等因素进行了试验,指出在生产中应严格控制高炉操作温度,并在按国标方法测定时,加入一定浓度的碱类,以模拟高炉生产的实际过程。提出熄焦时采用一定浓度的硼砂溶液喷洒焦炭,可改善焦炭的热性能。

Relationship between Coke Reactivity and Strength after Reaction and its Influencing Factors

For better prediction of coke behavior in blast furnace,a great many of coke varieties were detected and their relevant data analyzed.The results show that the coke reactivity and its strength after reaction have negative relativity.The cold strength of coke and its thermal property was compared.It is suggested that coking enterprise should pay more attention on the thermal property of coke on condition that the coke strength is qualified.The factors influencing coke reactivity and strength after reaction,including reaction temperature,alkali metals and passivant,were tested.It is emphasized that the blast furnace operation temperature should be controlled strictly.When using the national standard to determine the coke reactivity and the strength after reaction,alkali of certain concentration should be added to simulate the exact process in the blast furnace.It is suggested that to improve the thermal property of the coke,borax aqua of certain concentration should be sprayed onto the coke.