Adjustable ultra high power coherent jet oxygen lance nozzle for converter steel melting

Abstract

The invention relates to an adjustable integral ultrahigh power coherent oxygen lance nozzle for converter steel making, which comprises a nozzle, the nozzle comprises a cooling system and an injecting oxygen system which is arranged inside the cooling system and comprises an inner nozzle and a plurality of accessory holes, wherein, an inner nozzle is movably connected with the central position of the nozzle and the accessory holes are evenly arranged around the inner nozzle, which can ensure that the streams injected by the inner nozzle do not decay too soon, thus forming a strong air column attacking steel liquid level; and a flow field of molten metal with convection from the periphery to the inside forms according to the property of liquid flow field and the structure of furnace type, thus leading to the full reaction of oxygen and the impurities in steel liquid. The oxygen lance nozzle can directly match with the current oxygen lance only by replacing the nozzle. By testing, the oxygen lance nozzle can improve the oxygen utilization rate by 20 percent and reduces steelmaking cost. As the lance position is high, the phenomena of splashing, lance-sticking, slag mound and the like, do not easily appear during the steel making process, and the life of the oxygen lance can be improved by three to five times.

Description

technical field [0001] The invention relates to an oxygen lance nozzle for steelmaking, in particular to an adjustable ultra-high power cluster oxygen lance nozzle for converter steelmaking. Background technique [0002] At present, oxygen lance nozzles for converter steelmaking oxygen supply are mainly manufactured by casting or forging assembly of pure copper with central water cooling. With the development of converter steelmaking technology, this type of nozzle has gradually shown its shortcomings, mainly in: [0003] 1. During the blowing process, splashing, gun sticking, clumping and other phenomena are prone to occur, which will have a negative impact on production. When the situation is serious, the gun can only be replaced with a new one. [0004] 2. During the oxygen injection process, the speed of oxygen at the outlet of the nozzle can reach twice the speed of sound, the oxygen stream decays too fast, the stirring of the molten steel is not enough, and the impact...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and to provide a method that is not prone to splashing, gun sticking, clumping, etc. A powerful airflow column is formed to impact the molten steel surface, and the oxygen lance has a long service life. It is a high-efficiency, energy-saving and environmentally friendly adjustable super-high-power cluster oxygen lance nozzle for converter steelmaking.

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