A metallurgical mechanical stirring jet desulfurization agitator

Abstract

The invention relates to a mechanical stirring and spraying desulfurization stirrer for metallurgy, which comprises a stirring shaft and a stirring head connected under the stirring shaft; The included angles are the same; a straight-through air blowing channel is arranged on the stirring shaft, and some or all of the stirring blades are provided with a slanted downward shunt pipe, and each shunt pipe is connected with the straight-through air blowing channel to form a blowing gas channel; each The end of the shunt pipe forms a blowing port. In the present invention, the desulfurizing agent injection hole is arranged on the outermost wall of the symmetrical stirring blade, and the bubble generating position has a certain distance from the central vortex area, which can reduce the desulfurizing agent bubble aggregation and reduce the probability of bubble growth, so as to increase the gas-liquid The reaction area is increased, the gas-liquid reaction time is prolonged, and the efficiency of the desulfurization reaction is increased.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting technology, in particular to a metallurgical mechanical stirring jet desulfurization stirrer, in particular to a stirring paddle used for magnesium-based stirring compound jet molten iron desulfurization. Background technique [0002] Sulfur is in most cases detrimental to the quality of the steel, causing "hot embrittlement" problems, so a desulfurization process is necessary, and since hot metal desulfurization has the thermodynamic advantage of desulfurization, the desulfurization task of iron and steel production is in the modern steel production process. Most of them are located in the pretreatment of molten iron. Hot metal pretreatment desulfurization is mainly divided into KR method and injection method. Among them, the KR method replaces the desulfurization agent into the molten iron by stirring to form a vortex, but there are problems of large iron loss and high temperatur...

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Problems solved by technology

At present, this stirring and blowing method is to place the air blowing hole under the stirring paddle, and the bubbles are broken and thrown out by the stirring paddle during the floating process. The paddle and the rotary injection composite molten iron desulfurization agitator disclosed in the application number 201821570143.6 adopt this method, but through the physical water simulation experiment of mechanical agitation and injection by Liu Yan et al. No matter vertical hole injection, L-shaped horizontal injection or four-hole horizontal injection, the bubbles will quickly gather in the central vortex, reducing the degree of dispersion and miniaturization of the bubbles, which shows that the desulfurizer blown out by this stirring injection method is After the bubbles are blown out from the bottom, they will be attracted to the central vortex formed by stirring, so that a large number of bubbles cannot be crushed and thrown out, but collide with each other and grow up, accelerating to rise away from the molten pool, making the contact area and reaction time of the gas-liquid desulfurization reaction are at a lower level

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