Spinelle ventilated tundish filling pipe end and method for producing the same

A technology of spinel and spinel, which is applied in the direction of casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of reducing the ability to resist erosion and erosion of molten steel, inner wall erosion and perforation, and reduced service life.

Inactive Publication Date: 2009-07-08
马鞍山市益江高温陶瓷制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in the porosity of the inner wall material will inevitably reduce its ability to resist molten steel erosion

Method used

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  • Spinelle ventilated tundish filling pipe end and method for producing the same

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The production method of the present invention is that the product is secondary molded and fired separately. The specific production method is as follows:

[0018] (1) Coordinate and weigh the raw materials forming the inner wall according to the requirements in the table below:

[0019] raw material Specification Amount added (wt%) Magnesia alumina spinel 1-0.5 15～20 Magnesia alumina spinel 0.5-0 50～70 Magnesia alumina spinel 325# 10～15 Silica fume 95％，<200#

1～5 Aluminum powder <200#

1～5

SiC

<200#

1～3 B 4 C <200#

0.5～1.5

[0020] (2) After premixing the above-mentioned raw materials, add a thermosetting phenolic resin binder in an amount of 5% to 8%, mix well, dry to a volatile content of 1.5-3.5, and then trap the material for 24 hours.

[00...

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Abstract

The invention relates to a novel spinel permeable and anti-clogging tundish upper nozzle and a production method thereof. An inner wall of the spinel permeable tundish upper nozzle is made of permeable spinel, an outer wall is made of a common alumina-carbon material, and a gas passage is provided between the inner wall and the outer wall and is communicated with a gas inlet hole at an upper surface of a base. A burning schedule is controlled to cause air porosity of a spinel liner formed at high pressure to meet argon blowing requirements and to cause the spinel liner to be subject to secondary forming with outer wall materials and an argon passage to be reserved. The permeable and anti-clogging tundish upper nozzle made by the method can meet the argon blowing requirements, and the spinel liner has functions of blowing argon, anti-clogging and resisting.

Description

technical field [0001] The invention relates to an upper nozzle of a spinel air-permeable tundish and a production method thereof. Background technique [0002] When casting aluminum-killed steel and steel containing titanium and rare elements, it is easy to produce Al in molten steel at the inner wall of the tundish nozzle. 2 o 3 The adhesion and clogging of inclusions such as those lead to unstable continuous casting operation and non-metallic inclusions in the slab, which seriously affects and limits the efficiency and improvement of the continuous casting production line. At present, the methods and measures adopted to pass through the nozzle material for nozzle blockage are as follows: 1. Select some new materials with non-wetting properties for the nozzle material, and use their good corrosion resistance and non-wetability with slag to effectively to prevent Al 2 o 3 Second, the nozzle material that forms a low-melting point oxide on the nozzle interface is used, s...

Claims

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Application Information

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IPC IPC(8): B22D41/58B22D41/54C04B35/66C04B35/622C04B35/443
Inventor 夏发业孟录
Owner 马鞍山市益江高温陶瓷制造有限公司
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