Rotary injection desulfurization spray guns suitable for different types of hot metal tanks or different desulfurizers

Abstract

The invention discloses a rotary blowing desulfurization spray gun suitable for different types of molten iron tanks or different desulfurizers, comprising a connecting flange, a connecting section spray gun body, a gun body section spray gun body and a spray gun section, a main pipe and a reinforcing pipe of the spray gun section A plurality of rotating blades are symmetrically arranged on the outer wall, and the rotating blades include blade metal cores, and a plurality of inserting nozzles are symmetrically arranged on the side wall of the bottom of the main pipe, and the inserting nozzles pass through the blade metal cores , the outer wall of the inserting nozzle outside the metal core of the blade is provided with a graphite sleeve. The spray gun of the present invention greatly improves the floating time of desulfurizing agent and the ratio of penetrating air bubbles in the process of blowing desulfurization, significantly shortens the mixing time of molten pool, significantly improves the desulfurization dynamic conditions of desulfurization reaction, and reduces the liquid level of molten iron Fluctuation, so that the new desulfurization method invented can be used for different desulfurization agents and injection desulfurization on hot metal tanks of different sizes.

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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