Method for improving combined blown converter campaign length by metal furnace cinder composite mushroom

Abstract

A method for prolonging the campaign life of a combined blown converter by adopting a metal slag syntactic mushroom head belongs to the technique field of oxygen converter steelmaking. A circular seam type bottom blowing air-supplying element is adopted to replace a capillary permeable brick, thus allowing airflow to concentrate and raising the cooling power on the tip of a nozzle. After well-developed metal mushroom head is formed at the initial campaign stage of smelting process, slag splashing process is carried out immediately to form a slag mushroom head on the surface of the metal mushroom head. After the initial formation of the metal slag syntactic mushroom head, attention is paid on detecting whether the air pressure, P-Q curve of the flow relation, and cold state measurement value have obvious discrepancy; if the discrepancy is larger, the technology is appropriately adjusted to ensure the ventilation property. In the following campaign period, the mushroom head is protected; the mushroom head and hearth height are often detected; the deviation between cold state P-Q curve and the hot sate P-Q curve is detected, thus ensuring that the mushroom head can protect the bottom blowing element effectively in the whole campaign period and having good ventilation property. The method has the advantages of allowing the furnace campaign of the combined blown converter to achieve over 10000 and can reach to 30000 for maximum.

Description

technical field [0001] The patent of the invention belongs to the technical field of oxygen converter steelmaking, and in particular provides a method for increasing the service life of reblowing converters by using metal slag composite mushroom heads to protect bottom blowing gas supply components by generating a metal slag composite mushroom head at the initial stage of furnace service , so that the life of the bottom blowing gas supply element is synchronized with the life of the converter lining after slag splashing. Background technique [0002] Converter compound blowing is an advanced steelmaking process. Its technical principle is to install several bottom-blown gas supply elements at the bottom of the top-blown oxygen converter, blow inert gas into the furnace to stir the molten pool, and promote the slag-steel reaction balance. Adopting the combined blowing converter steelmaking process can change the technical problem that the melt pool reaction deviates from the ...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a method for increasing the service life of the double-blowing converter by using metal slag composite mushroom head, and a metal slag composite mushroom head is generated at the initial stage of

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