Practice of Repairing Hearth of No.7 2580 m3 Blast Furnace by Integrally Casting in Ansteel
In allusion to the problem that the serious erosion of the hearth and floor of No.7 blast furnace(BF)in Ansteel during its final service occurred,the damaging of the hearth was in-vestigated,and then the characteristics on hearth erosion and causes leading to erosion were analyzed.Based on that the hearth lining was repaired by using the integrally casting technology for the hearth during the intermediate maintenance of BF,which eliminated the potential safety hazard.After the BF was restarted,the furnace condition was in stable and smooth operation,and thus the production efficiency of BF was improved,and the utilization coefficient was increased from 1.727 t/(m3·d)to 2.092 t/(m3·d).
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