Anti-blocking molten iron blowing desulfurization spray gun with multi-strand cyclone dispersion function

Abstract

The invention discloses an anti-blocking molten iron blowing desulfurization spray gun with a multi-strand cyclone dispersion function. The anti-blocking molten iron blowing desulfurization spray gun is composed of a connection section, a gun body section and a blowing section, wherein the connection section is composed of a connection flange and a composite gun core in sequence, and the outer walls of the gun body section and the blowing section are a refractory material gun lining formed through pouring a refractory material; and a gun body outer diameter D of the blowing section is greater than a gun body outer diameter d of the gun body section, the composite gun core sequentially comprises an inner insertion tube, a main tube and a reinforcing tube from the inside to the outside, an inner insertion tube connector is installed on the inner wall of the bottom end of the reinforcing tube, the bottom end surface of the inner insertion tube is level with the bottom end surface of a graphite blowing tube, and wrapped with the refractory material gun lining to form a spray gun nozzle, and grooves are formed at the nozzle. According to the invention, the inherent shortages of poor reaction kinetics performance and high blocking frequency of a nozzle existing in a conventional spray gun are effectively solved through said structural design and optimization for the related structural dimensions; and meanwhile, the anti-damage capacity of the blowing section and the gun body section of the spray gun is effectively reinforced, and the purpose of prolonging the service life of the spray gun is achieved.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to a multi-strand swirling flow dispersion anti-blocking molten iron blowing desulfurization spray gun. Background technique [0002] According to data reports, the molten iron injection desulfurization process in the modern iron and steel metallurgical process is widely popularized and applied in domestic iron and steel enterprises due to its mature technology and low equipment investment. Injection of magnesium-based desulfurizers, compound injection of magnesium-based desulfurizers, and pure spraying of metal particles of magnesium; except for pure spraying of metal particles of magnesium on small and medium-sized molten iron tanks, the desulfurization of molten iron uses a spray gun with a gasification chamber at the head, and other processes use a single nozzle straight cylinder Type spray gun and inverted T-shaped or inverted Y-shaped double-nozzle spray gun. Due to th...

AI Technical Summary

Problems solved by technology

[0007] Based on the above, it can be seen that for molten iron injection desulfurization, the single-nozzle straight spray gun is not easy to block the gun, but the single-stream jet desulfurization kinetics conditions are poor; although the double-nozzle inverted T-shaped or inverted Y-shaped spray guns can significantly improve the desulfurization dynamics conditions, However, nozzle clogging is prone to occur, especially for the desulfurization of molten iron by metal particle magnesium pure injection and magnesium-based composite injection. Due to the deposition and adhesion of metal magnesium reaction products in the nozzle, nozzle clogging is very frequent, and due to the high temperature and semi-molten adhesion of the reaction product Bonding with normal temperature curing, it is very difficult to clean up the reactant sticky residue and dredge the nozzle

Other new structure spray gun patents have improved desulfurization kinetics, and even the improvement effect is more obvious, but the problem of spray gun clogging still exists, and the tendency of serious damage to the gun head is exposed

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