Oxygen lance Spray nozzle

Abstract

The invention relates to an oxygen lance spay nozzle which comprises an oxygen lance upper part, an oxygen lance middle part and an oxygen lance lower part; wherein a plurality of oxygen through holes area arranged at the end part of the oxygen lance upper part; a plurality of laval hole copper pillars are uniformly arranged on the end part of the oxygen lance upper part and form an air current channel with the oxygen through holes; the oxygen lance middle part is arranged in the middle part of the laval hole copper pillars; the oxygen lance lower part is arranged on the external side of the lower end part of the laval hole copper pillars; all parts are not integrally arranged; the centre line of the six laval hole copper pillars and the centre line of the oxygen lance upper part are arranged in 15-45 degree way; the laval hole copper pillars and the oxygen lance lower part are integrally arranged; the inner side of the lower end part of the laval hole copper pillars is provided with a bottom plate; all parts of the invention are mainly guaranteed by forging quality, have compact internal organization, and then form the product by the welding; the product is obviously superior to a casting piece in the collision performance and is reliable in use, and has high production percent of pass.

Description

technical field [0001] The invention relates to an oxygen lance nozzle, in particular to an oxygen lance nozzle with improved structure used on a rotary steel furnace, and belongs to the technical field of smelting equipment. Background technique [0002] In converter steelmaking, the oxygen lance is one of the key process equipment. It completes the work of blowing oxygen into the converter, and sprays oxygen to the liquid metal at a certain height from the surface of the molten pool to realize the smelting reaction of the metal molten pool. The oxygen lance works at high temperature in the furnace and is cooled by circulating water. It consists of a spray gun, a gun body and a gun tail; the most important part of the spray gun is the nozzle, and the structure of the nozzle directly determines the aerodynamic characteristics of the oxygen jet. Therefore, the basic requirement for the nozzle is that the dynamic parameters of the jet flow should meet the requirements of the ...

AI Technical Summary

Problems solved by technology

In the casting process, because red copper has good thermal conductivity and oxidizability, the difficulty of casting is greatly increased, especially the smelting and casting must be carried out under vacuum conditions, and this structural modeling is also difficult. Therefore, the nozzles after precision casting always have defects of one kind or another, for example, easy to produce air holes, shrinkage cavities, etc., and some dead corners are prone to sand inclusions and cold shut defects

As a result, the oxygen gun often has defects such as water leakage during use, and it takes about 4 hours to replace the gun head, which delays production and causes great losses

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