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为模拟高炉特点研究碱金属对焦炭气化反应的催化作用,在400～1450℃连续长温条件下,通入N_2和CO_2混合气,对弱粘结煤焦炭与强粘结煤焦炭进行了增碱焦和原焦的气化反应对比实验。结果表明,在本实验条件下,增碱焦的气化反应开始温度比原焦降低100℃左右。反应气体中CO_2消失温度(即反应激烈进行温度)降低约200℃。同时发现,强粘结煤焦炭的气化反应开始温度比弱粘结煤焦炭的约高50～100℃。而反应激烈进行温度相差不大。结合实验结果,本文还初步分析了气化反应开始温度与CO_2消失温度的降低对铁氧化物还原的影响。
In order to simulate the characteristics of blast furnace, the catalytic action of alkali metal on the gasification reaction of coke was studied. The mixture of N_2 and CO_2 was passed through continuous long-term temperature of 400 ~ 1450 ℃, Alkali coke and coke gasification reaction contrast experiment. The results show that under the experimental conditions, the initial temperature of gasification reaction of alkali increased by about 100 ℃ lower than the original coke. The disappearance of CO 2 in the reaction gas (that is, the temperature at which the reaction is intense) is reduced by about 200 ° C. At the same time, it was found that the start temperature of the gasification reaction of coherent coal coke is about 50-100 ℃ higher than that of weakly coherent coal coke. The fierce reaction to the temperature difference is not big. Combined with the experimental results, this paper also preliminary analysis of the initial gasification temperature and CO 2 disappearance of the temperature on the reduction of iron oxide reduction.