Rotary blowing desulphurization spray gun applicable to molten iron jars of various dimensions or various desulfurizing agents

Abstract

The invention discloses a rotary blowing desulphurization spray gun applicable to molten iron jars of various dimensions or various desulfurizing agents. The rotary blowing desulphurization spray gun comprises a connecting flange, a connecting section spray gun body, a gun body section spray gun body and a spray gun section; a plurality of rotating blades are arranged on a main pipe of the spray gun section and the outer wall of a reinforced pipe; each rotating blade comprises a blade metal core; a plurality of inner insertion type spraying pipes are arranged on the side wall of the bottom of the main pipe symmetrically; each inner insertion type spray pipe penetrates through the corresponding blade metal core; a graphite sleeve is arranged on the outer wall of each inner insertion type spray pipe of the corresponding blade metal core. By means of the spray gun, in the blowing desulfurization process, the ascent time of the desulfurizing agents is prolonged, and the ratio of bubbles which are penetrated through is increased substantially, the mixing time of a molten pool is shortened remarkably, the desulphurization dynamics conditions of a desulphurization reaction are improved remarkably, the undulation of the liquid level of molten iron is reduced, and therefore the spray gun can be used for blowing desulphurization of the various desulfurizing agents and the molten iron jars of various dimensions.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to a rotary jet desulfurization spray gun suitable for different types of molten iron tanks or different desulfurizers. Background technique [0002] Hot metal pretreatment and desulfurization, as an essential process in the production process of the modern iron and steel industry, has become one of the key technologies of the clean steel production platform. Among the many desulfurization methods, molten iron injection desulfurization has been widely used at home and abroad for its characteristics of low one-time investment, simple operation, and small temperature drop of molten iron. Molten iron blowing desulfurization is to use the spray gun inserted into the depth of the molten iron in the container to inject a large flow of desulfurization powder into the molten iron with a temperature above 1250°C through the injection channel by high-pressure nitrogen, and make the des...

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Problems solved by technology

[0012] The object of the present invention is to provide a kind of rotary blowing desulfurization spray gun and its application method that are used on metal particle magnesium, magnesium-based or calcium-based desulfurizers and different types of molten iron tanks in view of the above-mentioned deficiencies. Desulfurization uses the gasification chamber spray gun injection to bring about the inherent disadvantages of frequent maintenance of sticky slag in the gasification chamber, violent liquid level fluctuations, large spray gun vibration and small critical injection flow rate, and avoids the desulfurization agent in the direct spray gun injection process of large molten iron tanks Low utilization rate, low magnesium injection intensity, etc., can also greatly improve the kinetic conditions of desulfurization reaction in magnesium-based and calcium-based composite and mixed injection desulfurization processes, improve the utilization rate and production efficiency of desulfurizers, and reduce production costs.

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