Method for prolonging service life of KR stirring head

A technology of stirring head and service life, which is applied in the field of improving the service life of KR stirring head, can solve the problems of short service life of KR stirring head, achieve the effect of shortening stirring time, increasing service life and reducing temperature stress

Active Publication Date: 2016-06-15
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes methods that improve the performance (service-life) of an improved type of mixer called the kinetic turbine rotor found throughout this patents. These improvements include reducing friction caused during operation, increasing lifespan due to reduced thermal stresses, prevention against damage from heat shocks, increased efficiency when utilized with other materials like calcium oxide, and enhanced coolant flow through channels within the mixture's interior walls. Overall these benefits enhance its overall durability over existing designs.

Problems solved by technology

This technical problem addressed in this patented text relates to improving the efficiency of melting furnace operations during continuous casting processes that require precise compositional controls over process variables such as temperature or pressure conditions. By controlling the amount of impurity elements present within the liquid cast slab before solidification into ingots, these techniques help improve quality and productivity while reducing costs associated with energy consumption and pollution concerns.

Method used

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  • Method for prolonging service life of KR stirring head

Examples

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Embodiment 1

[0029] The present embodiment is a 300t KR desulfurization station, the diameter of the molten iron ladle used is 4150mm, and the depth of the molten iron after 300t molten iron is loaded is 4500mm. The blade length of the KR stirring head is designed to be 1453mm, and the ratio of the blade length of the KR stirring head to the diameter of the ladle is controlled to be 0.35. The area of ​​the blade facing the iron of the KR stirring head is 1.87 square meters. The ratio to the area of ​​the longitudinal section of the ladle is 0.10. Before the stirring head enters the molten iron and starts to stir, control the KR stirring head to bake for 5 minutes above the ladle. When the KR stirring head is baking above the ladle, the distance between the KR stirring head and the liquid surface of the ladle is 0.2m. During the desulfurization process, the maximum rotation speed of the KR stirring head is controlled to be 100rpm, the ratio of the immersion depth of the KR stirring head to th

Embodiment 2

[0031] The present embodiment is a 300t KR desulfurization station, the diameter of the molten iron ladle used is 4150mm, and the depth of the molten iron after 300t molten iron is loaded is 4500mm. The blade length of the KR stirring head is designed to be 1657mm. The ratio of the blade length of the KR stirring head to the diameter of the ladle is controlled to be 0.4. The area of ​​the KR stirring head blade facing the iron is 2.01 square meters. The ratio to the area of ​​the longitudinal section of the ladle is 0.10. Before the stirring head enters the molten iron and starts to stir, control the KR stirring head to bake for 15 minutes above the ladle. When the KR stirring head is baked above the ladle, the distance between the KR stirring head and the liquid surface of the ladle is 1.2m. During the desulfurization process, the maximum rotation speed of the KR stirring head is controlled to be 80rpm, the ratio of the immersion depth of the KR stirring head to the depth of mo

Embodiment 3

[0033]The present embodiment is a 300t KR desulfurization station, the diameter of the molten iron ladle used is 4150mm, and the depth of the molten iron after 300t molten iron is loaded is 4500mm. The blade length of the KR stirring head is designed to be 1867mm, and the ratio of the blade length of the KR stirring head to the diameter of the ladle is controlled to be 0.45. The area of ​​the blade facing the iron of the KR stirring head is 2.24 square meters. The ratio to the area of ​​the longitudinal section of the ladle is 0.10. Before the stirring head enters the molten iron and starts stirring, control the KR stirring head to bake for 20 minutes above the ladle. When the KR stirring head is baked above the ladle, the distance between the KR stirring head and the liquid surface of the ladle is 2m. During the desulfurization process, the maximum rotation speed of the KR stirring head is controlled to be 70rpm, the ratio of the immersion depth of the KR stirring head to the d

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Abstract

The invention relates to the technical field of metallurgy, in particular to a method for prolonging the service life of a KR stirring head. The method comprises the steps that 1, the ratio of the length of blades of the KR stirring head to the diameter of a hot metal ladle is controlled to be 0.35-0.45, and the ratio of the area of the surface facing iron of the blades of the KR stirring head to the area of the longitudinal section of the hot metal ladle is controlled to be 0.10-0.12; 2, before entering hot metal to be stirred, the KR stirring head is controlled to be baked for 5-20 min above the hot metal ladle; and 3, in the desulfurization process, the maximum rotating speed of the KR stirring head is controlled to be 70-100 rpm, and the ratio of the immersion depth of the KR stirring head to the depth of the hot metal is controlled to be 0.35-0.50. According to the method for prolonging the service life of the KR stirring head provided by the embodiment of the invention, the interior of the KR stirring head is prevented from producing cracks on the premise that efficient desulfurization is ensured, the shearing stress on the KR stirring head is reduced, and the service life of the KR stirring head is prolonged.

Description

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Claims

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Application Information

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Owner SHOUGANG CORPORATION
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