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A device and method for cleaning nodules on the nozzle of the tundish

A nozzle and nodulation technology, which is applied to casting molten material containers, metal processing equipment, manufacturing tools, etc., can solve the problems such as nozzle nodulation

Active Publication Date: 2019-07-05
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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  • A device and method for cleaning nodules on the nozzle of the tundish
  • A device and method for cleaning nodules on the nozzle of the tundish
  • A device and method for cleaning nodules on the nozzle of the tundish

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The following examples are shown with the equipment figure 1 , 2 3. To further explain a method to solve the problem of nozzle nodulation on the tundish.

[0055] The continuous casting bale capacity is 50 tons, the continuous casting equipment is: rectangular billet continuous caster, three machines and three streams, and the billet size is 180mm×220mm.

[0056] The device for cleaning Al2O3 nodules at the upper nozzle of the tundish is mainly composed of a round steel rod 4 containing a calcium core, a refractory rod 6, a hollow stopper rod 8, a horizontal holder and a vertical lifting frame. The vertical lifting frame is connected with the horizontal holder. The vertical lifting frame can control the vertical lifting movement of the horizontal holder. The horizontal holder is connected with the upper end of the refractory rod. The refractory rod can be fixed and driven by the horizontal holder. The refractory rod moves vertically up and down. The outer diameter of the re...

Embodiment 2

[0070] The following examples are shown with the equipment figure 1 , 2 3. To further explain a method to solve the problem of nozzle nodulation on the tundish.

[0071] The continuous casting bale capacity is 120 tons, and the continuous casting equipment is a thick slab continuous casting machine, a first-class machine, and a slab specification of 250mm×2200mm.

[0072] The device for cleaning Al2O3 nodules at the upper nozzle of the tundish is mainly composed of a round steel rod 4 containing a calcium core, a refractory rod 6, a hollow stopper rod 8, a horizontal holder and a vertical lifting frame. The vertical lifting frame is connected with the horizontal holder. The vertical lifting frame can control the vertical lifting movement of the horizontal holder. The horizontal holder is connected with the upper end of the refractory rod. The refractory rod can be fixed and driven by the horizontal holder. The refractory rod moves vertically up and down. The outer diameter of the ...

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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. Specifically, the invention relates to a device and method for cleaning nodules on the 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 the continuous casting. It has a link between the previous and the next, and is an important link to ensure the stable operation of the continuous casting. In the continuous casting process of the steel plant, the tundish nozzle and immersion nozzle often appear nodules and cause the nozzle blockage, which affects the quality of continuous casting and casting billet. With the improvement of 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 ca...

Claims

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Application Information

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Patent Type & Authority Patents(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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