Revamping Design of Liugang No.4 BF Slag Treatment System
Liugang No.4 BF works with Mingte slag treatment system in its first generation campaign,which has following problems after startup:large amount of steam generated on the site,high fault rate,and particularly heavy wearing of the e-quipment,such as pipes,valve and and pump of water system,caused by high fine slag content in the used blowing water and insufficient slag and water separation.In 2022,the Mingte process is replaced by the drum type process,where the ex-isting main structures of the pump house and cooling tower are reused,but the slag granulation process is revamped,mainly in the water and fine slag separation process,combined taper bucket sedimentation tank,water supply system of cooling tow-er,and environmental protection cover plate facility.After revamping,the equipment wearing,fault rate and maintenance workload are greatly reduced;the fine slag content in the water before and after the sedimentation tank drops to 66mg/L and 50 mg/L respectively,and no visible steam is found escaped from the equipment in the shop.
blast furnaceslag treatmentMingte processdrum type slag granulation processrevamping design
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