Desulfuration spray gun for molten iron refining

Abstract

The invention belongs to the field of molten iron desulfuration equipment, and in particular relates to a desulfuration spray gun for molten iron refining. The desulfuration spray gun comprises a central spray pipe (1), an air cooling cyclone agitating pipe (2), a refractory material layer (3), a protection pipe (5) and a framework (4); the refractory material layer (3) is matched with the outer part of the air cooling cyclone agitating pipe (2); the central spray pipe (1) is arranged in the air cooling cyclone agitating pipe (2); the air cooling cyclone agitating pipe (2) is sleeved in the protection pipe (5); the framework (4) is positioned in the refractory material layer (3) and is fixedly connected with the outer wall of the protection pipe (5); a vortex sheet (6) is fixedly arranged on the outer wall of the central spray pipe (1); a power supply wiring port component (7) is fixedly arranged on the upper part of the protection pipe (5); and a signal port of the power supply wiring port component (7) is connected with the protection pipe (5). By the desulfuration spray gun, the utilization rate of a desulfurizing agent which is directly used for removing sulfur can be increased, heat loss is reduced, melt splashing during a molten iron desulfuration process can be effectively reduced, and the desulfuration efficiency is high.

Description

technical field [0001] The invention belongs to the field of hot metal desulfurization equipment, in particular to a desulfurization spray gun for hot metal refining. Background technique [0002] The desulfurization injection desulfurization technology outside the molten iron furnace has been widely used since its development in the 1950s. This technology can better adapt to various desulfurization agents, give full play to the desulfurization ability of the desulfurizer, and achieve excellent desulfurization effect. [0003] Use powdery materials for molten iron desulfurization, such as using magnesium or magnesium-based mixtures (containing lime, calcium carbide, dolomite and other additives), the mixture can improve the ability (sulfur capacity) of the topping slag to hold sulfur, and realize the above methods. The equipment includes the meter for the feeder, the desulfurization agent injection and monitoring feeding system, the submerged refractory spray gun and its tu...

AI Technical Summary

Problems solved by technology

Although the above-mentioned methods and equipment are being adopted on a large scale, there are still three problems as follows: (1) The desulfurization agent is not fully absorbed. (2) The temperature drop of molten iron is obvious during the treatment; (3) The iron that enters the slag in the form of iron particles and is discarded with the slag after the treatment is finished is quite large.

[0004] In addition, because the injection and stirring holes of the existing spray gun are basically concentrated on the head of the spray gun, it cannot effectively destroy the rising spray bubbles, and the nozzle holes are easy to block and difficult to maintain The treatment will cause the spray gun head to be corroded and the service life will be reduced

[0005]Secondly, when the desulfurization spray gun is in working condition, due to the uneven distribution of the internal temperature field, different materials will be affected by stress conduction and other factors, which will cause the refractory material of the gun body to crack and fall off

Some spray gun heads have a desulfurization agent vaporization chamber to enhance the vaporization effect of the desulfurization agent and improve the desulfurization efficiency. However, due to the large vaporization chamber, it reduces the pressure of the tail nozzle, and it is easy to form large bubbles, resulting in melt spraying. splash

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