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Stopper rod

A technology of stopper rod and stopper head, which is applied in the field of refractory integral stopper rod, and can solve problems such as exceeding the economic value of refractory materials

Inactive Publication Date: 2006-08-02
VESUVIUS ADVANCED CERAMICS (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time required to remove the stopper from its complex mold greatly exceeds the economic value of the refractory

Method used

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  • Stopper rod
  • Stopper rod

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Embodiment Construction

[0023] Referring now to the drawings, there is shown a stopper rod (1) for controlling the flow of molten material from a tundish or vessel (not shown). The stopper rod (1) comprises a refractory body with an upper end (2), a lower end (3) and an axial hole (4) with a restriction in its lower region. An inert gas such as argon may be supplied from a gas source through an axial hole in the upper region of the stopper rod. Mounting means (5) for mounting the stopper rod on a lifting mechanism (not shown) are arranged in the first part A of the stopper rod at a distance d from the upper end (2) in the axial hole (4).

[0024] The third part C comprises the club head (6) comprising injection means for the inert gas. The gas may be injected directly from an axial bore, such as shown in FIG. 1 , or through a portion of porous material forming part of the club head, such as shown in FIG. 2 .

[0025] In the prior art stopper rod (FIG. 1), the second part B is substantially cylindri...

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PUM

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Abstract

There is provided a refractory mono-block stopper of substantially cylindrical configuration having an upper end, a lower end and Ana axial bore extending downwardly from the upper end, means being provided in the axial bore at a distance (d) from the upper end for attachment of the stopper to a lifting mechanism, the stopper being divided into three portions (A, B, C); a first portion (A) extending from the upper end towards the lower end until a distance greater than (d), a second portion (B) extending from the first portion (A) towards the lower end and a third portion (C) extending from the second portion (B) and comprising a stopper nose ending at the lower end of the stopper. The stopper of the invention is characterized in that the average section of the second portion (B) is lower than the section of the first portion (A) and the highest section of the third portion (C) is higher than the lowest section of the second portion (B). The stopper of the invention has a significantly reduced weight without any observable loss of strength. It is also noted that since the profile of the stopper can be kept symmetrical around its axis, the stopper does not require extra handwork to be removed from the mould.

Description

technical field [0001] The present invention relates to a stopper rod for use as part of a valve mechanism to control the flow of molten material from a vessel through a submerged nozzle. In particular, the present invention relates to a refractory one-piece stopper rod, that is, a one-piece ceramic stopper rod, which is currently used to control the flow of molten metal from a sprue mounted on the bottom of a vessel containing the molten liquid, such as a ladle or tundish. discharge. This is typically used to allow steel to be cast into a water-cooled mold through an opening in the bottom of the tundish through the sprue and refractory brick sleeve. Background technique [0002] Typically, the stopper rod consists of an elongated cylindrical refractory ceramic body composed of isostatically pressed graphite / alumina, with a circular or conical profile (stopper tip) at the lower end, adapted to be inserted into the corresponding discharge The throat of the nozzle, and the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/18B22D11/10
CPCB22D41/186B22D41/18
Inventor 布伦丹·M·莫里亚蒂弗朗索瓦-诺埃尔·理查德埃里克·汉斯
Owner VESUVIUS ADVANCED CERAMICS (CHINA) CO LTD