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鞍钢三高炉焦比在很长一段时间比较高。炉顶布料全部使用PPKK(料线1.75米～2.0米),边沿CO_2始终较轻,煤气利用不好。当时认为炉顶布料调剂已经到顶,再没有什么办法可以改善的了。后来试用PKPK的混合装料法,取得了显著的效果,综合CO_2由14％提高到16％以上。奇怪的是采用这种装入制度后,边沿更重。1964～1965年又进行了十几次反复试验,得到了肯定的结论。为了利用料车式高炉对炉顶调剂的灵活性,充分掌握每一种炉顶布料对高炉行程的影响,1965年10月我们在炉顶布料上又进行了新的尝试。试验前装入制度为3PKPK+2PPKK1.75米上料,矿石批重14.2吨。炉喉煤气曲线几乎呈“馒头形”(图之Ⅰ)。采用3PKPK+2PKKP的装料
Angang three blast furnace coke ratio is relatively high for a long time. The top of the cloth all use PPKK (line 1.75 m ~ 2.0 m), the edge of CO_2 is always lighter, gas utilization is not good. At that time, that the top of the cloth swap has reached its peak, there is no way to improve the. Later trial PKPK mixed charge method, and achieved remarkable results, the comprehensive CO 2 increased from 14% to 16%. Strangely, with this loading system, the edges are heavier. From 1964 to 1965 again conducted a dozen times repeatedly tested, got the affirmative conclusion. In order to make use of the flexibility of the blast furnace to adjust the roof of the blast furnace and fully understand the impact of each roof blast on the blast furnace stroke, in October 1965 we made another new attempt on the roof cloth. The pre-test loading system is 3PKPK + 2PPKK1.75 meters feeding, weighing 14.2 tons of ore. The throat gas curve is almost “steamed bread” (Figure Ⅰ). With 3PKPK + 2PKKP charge