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Device and method for cleaning tundish upper water gap nodules

A nodule and nozzle technology, which can be used in casting melt containers, metal processing equipment, casting equipment, etc., and can solve problems such as nozzle nodules

Active Publication Date: 2018-06-19
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, although calcium treatment can alleviate the phenomenon of nodulation at the nozzle, it will still cause nodulation at the nozzle when the absolute amount of inclusions is large or the calcium treatment is not performed properly.

Method used

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  • Device and method for cleaning tundish upper water gap nodules
  • Device and method for cleaning tundish upper water gap nodules
  • Device and method for cleaning tundish upper water gap nodules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The following examples are shown together with the device figure 1 , 2 3. Further explain a method for solving the problem of nodulation at the upper nozzle of the tundish.

[0054] The continuous casting ladle capacity is: 50 tons, and the continuous casting equipment is: rectangular billet continuous casting machine, three machines and three streams, and the billet size is 180mm×220mm.

[0055] The device for cleaning Al2O3 nodules at the upper nozzle of the tundish is mainly composed of a round steel rod 4 with a calcium core, a refractory material rod 6, a hollow stopper rod 8, a horizontal holder and a vertical lifting frame. The vertical lifting frame is connected with the horizontal clamper, and the vertical lifting movement of the horizontal clamper can be controlled through the vertical lifting frame. The horizontal clamper is connected with the upper end of the refractory material rod, and the refractory material rod can be fixed and driven The refractory ro...

Embodiment 2

[0069] The following examples are shown together with the device figure 1 , 2 3. Further explain a method for solving the problem of nodulation at the upper nozzle of the tundish.

[0070] The large ladle capacity of continuous casting is: 120 tons, and the continuous casting equipment is: thick slab billet continuous casting machine, a first-class machine, and the billet size is 250mm×2200mm.

[0071] The device for cleaning Al2O3 nodules at the upper nozzle of the tundish is mainly composed of a round steel rod 4 with a calcium core, a refractory material rod 6, a hollow stopper rod 8, a horizontal holder and a vertical lifting frame. The vertical lifting frame is connected with the horizontal clamper, and the vertical lifting movement of the horizontal clamper can be controlled through the vertical lifting frame. The horizontal clamper is connected with the upper end of the refractory material rod, and the refractory material rod can be fixed and driven The refractory rod...

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Abstract

The invention belongs to the technical field of steel metallurgy and particularly relates to a device and method for cleaning tundish upper water gap nodules. In the continuous casting process, when the tundish upper water gap nodule phenomenon appears, the opening degree of a plug bar is turned down, the pulling speed is reduced to 20-30% of the normal pulling speed, a segment of round steel barcontaining a calcium core is inserted into the tundish upper water gap from the hollow plug bar, steel shells at concave points or concave lines are molten by steel liquid, concave holes or gaps appear in the surface of the periphery of the round steel bar, the calcium core inside the round steel bar is heated to be a gaseous state, the gaseous calcium is sprayed out from the concave holes or thegaps to Al2O3 nodules inside the tundish upper water gap, and the calcium reacts with the Al2O3 nodules. By means of the device and method for cleaning the tundish upper water gap nodules, the cleaning time for the Al2O3 nodules is just 1-5 minutes which is far less than the time for continuous casting order replacement, the improvement of continuous casting production quantity is facilitated, thecaused production loss is far less than that caused by the replacement of a tundish, the plug bar will not be eroded, and the service life of the plug bar will not be shortened.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular, the invention relates to a device and a method for cleaning nodules on the upper nozzle of a tundish. Background technique [0002] Continuous casting is an important process in the metallurgical production process. As an important refractory material connecting the tundish and the mold, the nozzle is called the "neck" of continuous casting. In the process of continuous casting in iron and steel plants, nodules often appear in the tundish nozzle and submerged nozzle and cause nozzle blockage, which affects the pouring and billet quality of continuous casting. With the improvement of the continuous casting process and the development of refractory materials, the service life of the nozzle has been significantly improved, however, A1 will occur during the casting process 2 o 3 And the nodulation phenomenon of some other elements, especially when casting Al-kil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/54
CPCB22D41/54
Inventor 刘洪银孙建卫刘曌娲路峰王孝科郝帅王利袁鹏举亓伟伟王奉县
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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