Molten-iron desulphurization spraying gun

Abstract

The invention belongs to the field of molten iron pretreatment desulphurization devices, and particularly relates to an efficient molten-iron desulphurization spraying gun. The molten-iron desulphurization spraying gun comprises a spraying gun body. The spraying gun body comprises a central spraying pipe (1), a gas storage chamber (2) and a gas distribution bin (3). The central spraying pipe (1) penetrates through the gas storage chamber (2) and is fixedly connected with the gas storage chamber (2). A gas spraying and blowing pipe (4) is arranged in the gas distribution bin (3). An upper end opening of the gas spraying and blowing pipe (4) is communicated with the gas storage chamber (2), and a lower end opening of the gas spraying and blowing pipe (4) is communicated with the gas distribution bin (3). A plurality of gas spraying and blowing openings (5) are formed in the side wall of the gas distribution bin (3). A fireproof material protection layer (6) is fixedly arranged outside the gas distribution bin (3). The molten-iron desulphurization spraying gun is simple in structure, large in stirring force and high in desulphurization efficiency.

Description

technical field [0001] The invention belongs to the field of molten iron pretreatment desulfurization equipment, in particular to a molten iron desulfurization spray gun. Background technique [0002] With the rapid development of modern industrial production and science and technology, the requirements for steel quality are increasing day by day. For example, in order to avoid internal cracks in the billet and obtain good surface quality, the sulfur content of ordinary steel is required to be less than 0.020%; in order to make the structural steel have uniform mechanical properties (that is, reduce anisotropy), it is required that the sulfur content in the steel The amount is less than 0.010%; in order to make oil and natural gas pipelines, steel for petroleum refining equipment, steel for offshore oil production platforms, steel for low temperature, thick ship plate steel and aviation steel, etc., have hydrogen-induced crack resistance and more uniform Mechanical properti...

AI Technical Summary

Problems solved by technology

[0003] The desulfurization spray gun used in the existing injection method has a single direction of stirring force and insufficient stirring force, which will cause some desulfurization agents to float up into the slag without participating in desulfurization, and some desulfurization products will not float up enough and remain in the molten iron. The effect of desulfurization, the stirring force is weak, resulting in slow desulfurization reaction speed and low desulfurization efficiency

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