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湘钢2号高炉(容积750m~3)于1973年设计,1975年施工并投产。十多年来,生产指标一直很差。到1984年为止,年平均利用系数最高1.01t铁/m~3·d,综合焦比最低为702kg/t铁。生产指标差的主要原因有两个:一是原料结构不合理,熟料率仅35%左右;矿石品种多,入炉品位仅47%左右,虽使用高碱度烧结矿(R在2.5左右),每吨生铁入炉熔剂量仍高达300kg,烧结矿未进行槽下筛分,含粉率高,矿石粒度偏大,入炉块矿粒度>30mm的占40～50%;二是风机能力小,年平均冶炼强度最高0.718。现已决定于1986年底将其进行大修。本文简单介绍该高炉技术改造设计内容,以供国内同类型高炉技术改造设计时参考。一、技术改造设计的基本思想
Xiangtan Steel 2 blast furnace (volume 750m ~ 3) was designed in 1973, construction and put into operation in 1975. For more than a decade, production indicators have been poor. By 1984, the annual average utilization coefficient was up to 1.01t iron / m ~ 3 · d, and the lowest comprehensive coke ratio was 702kg / t iron. The main reasons for the poor production index are two: First, the structure of raw materials unreasonable, clinker rate of only 35%; ore variety, into the furnace grade is only about 47%, although the use of high alkalinity sinter (R is about 2.5) , The amount of flux per ton of pig iron into the furnace is still as high as 300kg, sinter is not under the sieve screening, high rate of powder, ore size is too large, into the ore block size> 30mm accounted for 40 to 50%; Second, the fan capacity is small , The average annual refining strength of up to 0.718. It has now been decided to overhaul it by the end of 1986. This article briefly introduces the design content of blast furnace technology reform for the domestic blast furnace technology to transform the design reference. First, the basic idea of technological transformation design