High-efficiency desulfurization of molten iron and long-life anti-blocking spray gun

Abstract

The invention discloses a long-life anti-blocking spray gun for efficient desulfurization of molten iron, which is composed of a connection section, a gun body section and an injection section, the connection section is sequentially composed of a connection flange and a composite gun core, and the injection section includes the injection section gun body And the gun head arranged on the top of the gun body of the injection section, the composite gun core runs through the entire gun body section and the gun body of the injection section extends into the middle of the gun head; An inner intubation tube connector is installed on the inner wall of the bottom end of the reinforcing tube, and a hollow fixing groove is arranged at the lower end of the inner intubation tube guide, and a graphite blowing pipe is installed in the fixing groove. The invention realizes the comprehensive purposes of preventing the spray gun from clogging, facilitating maintenance and replacement of clogged parts, prolonging the service life of the spray gun, reducing the maintenance cost of the spray gun and the consumption of desulfurizing agent, and improving the operation rate of desulfurization production.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to an efficient desulfurization and long-life anti-blocking spray gun for molten iron. Background technique [0002] A large number of studies have shown that hot metal pretreatment desulfurization has been recognized as the most economical process for reducing the mass fraction of sulfur in steel in the blast furnace converter-continuous casting process. It is one of the important means to improve the operation of blast furnaces and converters, and plays an important role in steelmaking. , and develop towards the direction of comprehensive molten iron pretreatment. [0003] 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, c...

AI Technical Summary

Problems solved by technology

It can be seen that the semi-circular or semi-elliptical cross-section diverter groove designed in the above-mentioned patent can only induce the direction change of the floating air flow, and it is difficult to achieve the effect of splitting the stream, and the improvement of dynamic conditions is limited.

[0006] 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

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