Method for efficiently removing slag splashing layer at joint of bottom and body of converter with movable bottom

Abstract

The invention discloses a method for efficiently removing a slag splashing layer at a joint of a bottom and a body of a converter with a movable bottom. The method for efficiently removing the slag splashing layer at the joint of the bottom and the body of the converter with the movable bottom comprises the steps of carrying out preparation work before shutdown, carrying out shutdown operation, carrying out oxygen blowing operation in the converter, carrying out soaking erosion on the slag splashing layer at the joint of the bottom and the body, and carrying out inspection and confirmation on the slag splashing layer at the joint of the bottom and the body. According to the method for efficiently removing the slag splashing layer at the joint of the bottom and the body of the converter with the movable bottom, the slag splashing layer can be effectively removed, the gun position, the oxygen supply intensity and the soaking erosion time of an oxygen gun are reasonably controlled according to the actual values of the thickness of a working layer of a lining and the height of the bottom which are actually measured before shutdown, and the steel leakage accident is avoided while the slag splashing layer of the bottom and the body is completely removed; and the method has the advantages of being short in time, stable in operation and high in safety coefficient, the converter washing operation time can be controlled within 30 minutes, and the working efficiency is high.

Description

technical field [0001] The invention relates to the technical field of converter furnace condition maintenance technology, in particular to a method for efficiently removing the slag splash layer at the joint between the furnace bottom and furnace body of a live furnace bottom. Background technique [0002] Due to the extremely complex and intense physical and chemical reactions and mechanical movements in the converter during the blowing process, affected by high temperature and harsh conditions, the converter lining is easily eroded and damaged during use. When the working layer of the converter lining is eroded to a residual thickness of about 100mm, the lining must be replaced. Otherwise, not only will the cost of refractory materials for furnace maintenance be increased, but also steel breakout accidents will easily occur. For live-bottom converters, before replacing the furnace lining, the furnace bottom and the furnace body should be separated first, and then the furn...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for efficiently removing the slag-splashing layer at the joint between the furnace bottom and the furnace body of the live furnace bottom, which can effectively solve the problem that the slag-splashing layer at the joint between the furnace bottom and the furnace body cannot be removed in the existing cleaning operation. Thoroughly, the furnace bottom and the furnace body cannot be effectively separated, and the secondary separation operation has the problem of greater safety risks. The high-efficiency removal method of the present invention blows a supersonic oxygen jet into the furnace through an oxygen lance, and utilizes oxygen and The slag reaction has the technical characteristics of rapid temperature rise and high temperature and high (FeO) content slag after the reaction, which meets the thermodynamic conditions of high temperature and high (FeO) content slag required to corrode the slag splash layer of the furnace lining. The measured height of the furnace bottom, reasonable control of the position of the oxygen lance, the oxygen flow rate and the cumulative amount of oxygen, so that the good dynamic conditions for the oxygen jet to wash and stir the slag splash layer at the joint between the furnace bottom and the furnace body are beneficial to this area. The slag-splashing layer is corroded and peeled off. After the oxygen blowing is over, the time for soaking and eroding the slag-splashing layer at this place is appropriately increased, which is more conducive to the uniformity and completeness of the erosion of the residual slag-splashing layer, and finally achieves the complete and effective separation of the furnace bottom and the furnace body.

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