High-performance stirrer used for molten iron mechanical-stirring desulfuration

Abstract

The invention discloses a high-performance stirrer used for molten iron mechanical-stirring desulfuration. The stirrer comprises a stirring shaft and stirring blades. The stirring blades are divided into the upper layer stirring blades and the lower layer stirring blades. The upper layer stirring blades and the lower layer stirring blades are all evenly distributed in the circumferential direction of the stirring shaft. The number of the upper layer stirring blades is the same as that of the lower layer stirring blades. The upper layer stirring blades and the lower layer stirring blades are distributed in a staggered manner. By means of the high-performance stirrer, the aims of enlarging the desulfurizing agent stirring and mixing area, prolonging the entrainment floating circulation stroke of a desulfurizing agent in molten iron and improving the desulfurizing agent particle mixing dispersion degree and the molten iron desulfuration efficiency can be achieved during actual production.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment, in particular to a high-performance stirrer for mechanical stirring desulfurization of molten iron. Background technique [0002] The document "External desulfurization of molten iron, Shanxi Metallurgy, 2007, No1" reported that molten iron is the basic raw material for molten steel smelting, and its chemical composition and physical properties determine the quality of steel products and the benefits of enterprises to some extent. Therefore, Since the 1970s, people began to pay attention to the development of molten iron pretreatment technology, and continuously improved its technology and methods to remove harmful elements in molten iron. In addition to sulfur-containing steel, sulfur is one of the main harmful elements in steel, but in the process of blast furnace ironmaking, it is necessary to increase the alkalinity of slag and furnace temperature, which will reduce the technical and e...

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Problems solved by technology

[0005] The purpose of the present invention is based on the domestic and foreign KR stirring desulfurization stirring structure parameters on the influence theory and experimental research results of stirring mixing characteristic parameters and the vortex entrainment characteristics of the conventional single-layer cross-blade stirrer KR mechanical stirring desulfurization, aiming at its local mixing Due to the disadvantages of uneven mixing and dispersion of the desulfurizing agent and poor fluid dynamic conditions of the desulfurizing reaction, a high-performance agitator for mechanical stirring and desulfurization of molten iron is provided. The desulfurizer in water has the characteristics of long stroke, uniform dispersion and high desulfurization efficiency.

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