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从1977年以后,我厂两座620m~3高炉在原料条件逐步改善的基础上,为提高煤气利用分别试验了大批重同装和大批重分装。前者矿批从8～10t逐步增大到18～20t,炉顶煤气CO_2由9～12%提高到13～14%,后者矿批进一步扩大到30t以上,煤气CO_2又提高到14～16%。对焦比大幅度下降,都起了重要作用。1980年以后,摸索和应用大小批重配合布料,近年来进一步发展和完善了这一布料方法,使炉顶煤气CO_2平均提高到16%以上,焦比降低到630kg/t左右的新水平。
From 1977 onwards, two 620 m ~ 3 blast furnaces of our plant were tested on the basis of gradual improvement of raw material conditions, with a large number of heavy equipment and heavy equipment re-installed to improve gas utilization. The former batch of ore gradually increased from 8 to 10t to 18 to 20t, and the top gas CO_2 increased from 9 to 12% to 13 to 14%. The latter batch further expanded to more than 30t and the gas CO 2 increased to 14 to 16% . Focal ratio dropped significantly, have played an important role. After 1980, grope and batch size fabric was explored and applied. In recent years, the fabric method was further developed and perfected to increase the average CO_2 of the top gas above 16% and the coke ratio to a new level of about 630kg / t.