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本文是以名古屋1~#高炉解体调查的结果为基础,对大型高炉内焦炭粒度缩小进行了研究。这些研究结果表明:1)高炉内焦炭粒度缩小受与CO_2反应温度的影响最大;2)在1000℃时,开始有部分焦炭溶解,致使焦炭强度下降,到1400℃时,焦炭粒度并没有改变,但是超过1400℃时,焦炭粒度急剧缩小;3)在炉身下部和风口回旋区附近产生了焦末沉积,这是由于鼓风动能的作用而引起焦炭不断运动的结果;4)增加焦炭中碱金属的含量(本研究中最高达5％)并不降低焦炭强度。 此外,对新日铁已解体调查的不同容积的高炉及这些高炉内的焦炭粒度变化之间的关系进行了研究,并指出了大型高炉比小型高炉焦炭粒度减少的比率更大,焦炭粒度缩小的状况更为剧烈。
Based on the investigation of the disintegration of 1 ~ # blast furnaces in Nagoya, this paper studies the reduction of coke particle size in large blast furnaces. The results of these studies indicate that: 1) the reduction of coke size in the blast furnace is most affected by the reaction temperature with CO 2; 2) at 1000 ℃, some coke dissolves initially, resulting in the decrease of coke strength. At 1400 ℃, the coke size does not change, However, when the temperature exceeds 1400 ° C, the coke particle size sharply decreases. 3) Coke deposition occurs in the lower part of the shaft and in the vicinity of the tuyere, as a result of the continuous movement of coke due to the kinetic energy of the blast. 4) The metal content (up to 5% in this study) does not reduce the coke strength. In addition, the relationship between the different volume blast furnaces explored by Nippon Steel Corporation and the variation of coke particle sizes in these blast furnaces was investigated. It was also pointed out that larger blast furnaces had a smaller ratio of coke size reduction and a smaller coke size The situation is more intense.