ISSN 2594-357X
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Abstract
The present paper makes comprehensive elaboration on the long life of blast furnace (BF) hearth from the perspective of key factors to hearth design and corrosion and heat transfer system. Such analyses point out that the important control aspects on BF service life will be design, construction, dry-out, blow-in process, operational stability and maintenance management. To effectively prevent and eliminate air gap will hinge so much on expanding hearth life under the proper hearth cooling system and structure. Specifically, in design, complete measures shall be made on gap prevention; in construction, every link shall be strictly controlled; in dry-off, hot water shall be used for getting higher furnace wall temperature and more evaporation; in blow-in process, due run-in time shall be considered for the new BF to ensure reliable and valid heat transfer system of hearth, all of which pursue air-gap-free operation. No matter what structure and cooling system of refractory is applied to the hearth, only through building effective heat transfer system can the slag-iron skull be formed quickly and stably so as to realize longer campaign life of furnace hearth.
The present paper makes comprehensive elaboration on the long life of blast furnace (BF) hearth from the perspective of key factors to hearth design and corrosion and heat transfer system. Such analyses point out that the important control aspects on BF service life will be design, construction, dry-out, blow-in process, operational stability and maintenance management. To effectively prevent and eliminate air gap will hinge so much on expanding hearth life under the proper hearth cooling system and structure. Specifically, in design, complete measures shall be made on gap prevention; in construction, every link shall be strictly controlled; in dry-off, hot water shall be used for getting higher furnace wall temperature and more evaporation; in blow-in process, due run-in time shall be considered for the new BF to ensure reliable and valid heat transfer system of hearth, all of which pursue air-gap-free operation. No matter what structure and cooling system of refractory is applied to the hearth, only through building effective heat transfer system can the slag-iron skull be formed quickly and stably so as to realize longer campaign life of furnace hearth.
Keywords
Long life of BF hearth; Heat transfer system; Cooling water; Air gap; Hearth structure design.
Long life of BF hearth; Heat transfer system; Cooling water; Air gap; Hearth structure design.
How to refer
Zhong-ping, Zou;
Xianzhen, Guo.
STUDY ON LONG CAMPAIGN LIFE OF BLAST FURNACE
HEARTH
,
p. 2802-2814.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22708
