摘要
根据高炉的炉料平衡,对典型高炉不同区域内的炉渣碱度进行计算。分析结果显示,在大喷煤条件下,传统的高炉配料方式导致炉内渣碱度变化很大,减少了高炉内气-液-固相共存区,降低了高炉下部的透气性。通过风口向炉内喷吹石灰粉来平衡喷煤灰分的碱度,可实现减少炉腹渣量、减缓炉内渣碱度波动、提高软熔带、扩大三相共存区、增加下部透气性、提高煤粉燃烧性、保证高炉顺行和提高高炉产量。
Based on the mass balances of blast furnace, typical slag basicity was calculated and analyzed in different zones of the blast furnace. Analysis results show that, under large pulverized coal injection, the conventional burden induces the fluctuation of basicity of slag along the blast furnace height, the decrease of three-phase zone and the permeability of lower part of blast furnace. To solve the problem, injection of limes into the blast furnace instead of charging from the top could be a good solution. Once the charging of limes from the top is replaced by injection via the tuyeres, the smooth operation and increasing productivity of the blast furnace can be obtained, besides the decreasing bosh slag volume, the proper basicity of slag, the higher location of cohesive zone, the extending of three-phase zone, the increasing of permeability and pulverized coal combustibility.
出处
《中国冶金》
CAS
2008年第1期24-27,共4页
China Metallurgy
关键词
高炉
喷煤
喷吹熔剂
炉渣碱度
blast furnace
pulverized coal injection
flux injection
slag basicity
