Upper repairing method for mammoth converter lining

Abstract

The invention relates to a repair building process on the lining of a large-size converter, which specifically comprises fixing a furnace-repairing towel system on the right upper portion of the center line of the converter, then hanging the body of the furnace-repairing towel on the repairing position of the converter which is fixedly connected on a furnace-repairing platform, transporting repair workers and material to the body of the converter through a lifting cage of the furnace-repairing towel, unfolding a retractable working platform, and putting materials and tools on the working platform. Workers build the furnace by means of the working platform, and wastes are taken out by the lifting case. The retractable working platform is restored after finished the building of the converter, the furnace-repairing towel body is detached from the furnace-repairing towel platform, the furnace-repairing body is hanged to the storage position from the repairing working position of the converter, the furnace-repairing system is moved to an awaiting machine-position from the working position by positioning stillage truck, thereby finishing the whole repairing lining work. The process meets the economical, practicable, reasonable and reliable principles, which can be used on the repair of the converters with 180T-250T or converters with more 300T.

Description

technical field [0001] The invention relates to maintenance of a large-scale converter, in particular to a method for repairing and repairing the furnace lining of a large-scale converter. Background technique [0002] At present, the domestic large-scale converter is a steelmaking process characterized by economical and practical and relatively high slag splashing furnace protection technology to increase the furnace life and prolong the furnace repair service. [0003] Oxygen converter steelmaking is carried out at a high temperature above 1600 °C. A certain thickness of refractory material must be built inside the converter shell as a furnace lining. The furnace lining is mainly composed of three parts: the working layer, the permanent layer and the filling layer. Usually according to the structure of the converter furnace, the furnace shell is divided into three parts: the furnace cap, the furnace body and the furnace bottom; the furnace cap is usually made of magnesia c...

AI Technical Summary

Problems solved by technology

[0005] The methods of converter up-repair generally include: converter simple up-repair method, suitable for small and medium-sized converters, with converters of 80t-200t Maanshan Iron and Steel, Lian Iron and Steel, and Wuhan Iron and Steel as typical representatives; Shagang’s converter is a typical representative; large-scale converter repair tower repair method is suitable for large-scale converters, with 300t converter Maanshan Iron and Steel as its typical representative; foreign large-scale converter repair methods are suitable for large-scale converters, and Wuhan Iron and Steel No. Represented by converter and Baosteel 300t converter, it is characterized by high automation and mechanization, coupled with complex hydraulic system, the equipment cost is very high

[0006] From the point of view of the steelmaking process, the above-mentioned converter repairing methods, the furnace repair system represented by the 250t converter of Wuhan Iron and Steel No. The cost of equipment is very high, and it is not suitable for the steelmaking process characterized by the use of slag splashing to protect the furnace in our domestic large-scale converters to increase the furnace life and prolong the furnace repair service.

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