Stopper rod head and preparation method thereof

A rod head and rod head technology, applied in the field of stopper rod head and its preparation, can solve the problems of insufficient thickness of the slag line part, erosion of the aluminum carbon rod body material, affecting the normal progress of continuous casting, etc. Erosion, improved erosion resistance, excellent thermal shock stability effect

Inactive Publication Date: 2020-04-10
泰州市旺鑫耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to improve the quality of the slab, the tundish covering agent is widely used, and the working environment of the stopper rod head has undergone great changes. Participate in the phenomenon of insufficient thickness, resulting in the breakage of the stopper rod head during use, which in turn affects the normal operation of continuous casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of stopper tip, comprises; By weight percentage is as follows:

[0040] Spinel particle diameter 0.5-1mm 20%

[0041] Spinel particle diameter 0.2-0.5mm 10%

[0042] Spinel particle diameter 0-0.5mm 20%

[0043] Spinel particle diameter 0-180mm 20%

[0044] Graphite 199 10%

[0045] Graphite 899 5%

[0046] Additive 5%

[0047] Binder 10%%

[0048] Its preparation method is as follows:

[0049] S1, batching; Proportion the stopper tip according to the formula by weight percentage;

[0050] S2, mixing materials; put the stopper bar head raw material into the mixer and fully mix it evenly to obtain the mud material;

[0051] S3, volatilization; drying the mud at 60°C until the volatile content is 0.8%;

[0052] S4, trapped material; put the mud material at a constant temperature for 12 hours;

[0053] S5, charging and pressing; the mud after drying is added in the mould, and the mud is pressed into shape by a pressure 100Mpa isostatic press;

[0054] S6,...

Embodiment 2

[0061] A kind of stopper tip, comprises; By weight percentage is as follows:

[0062] Spinel particle diameter 0.5-1mm 10%

[0063] Spinel particle diameter 0.2-0.5mm 10%

[0064] Spinel particle diameter 0-0.5mm 20%

[0065] Spinel particle diameter 0-180mm 30%

[0066] Graphite 199 5%

[0067] Graphite 899 5%

[0068] Additive 5%

[0069] Binder 15%

[0070] Its preparation method is as follows:

[0071] S1, batching; Proportion the stopper tip according to the formula by weight percentage;

[0072] S2, mixing materials; put the stopper bar head raw material into the mixer and fully mix it evenly to obtain the mud material;

[0073] S3, volatilization; drying the mud at 60°C until the volatile content is 0.8%;

[0074] S4, trapped material; put the mud material at a constant temperature for 12 hours;

[0075] S5, charging and pressing; the mud after drying is added in the mould, and the mud is pressed into shape by a pressure 100Mpa isostatic press;

[0076] S6, d...

Embodiment 3

[0083] A kind of stopper tip, comprises; By weight percentage is as follows:

[0084] Spinel particle diameter 0.5-1mm 10%

[0085] Spinel particle diameter 0.2-0.5mm 10%

[0086] Spinel particle diameter 0-0.5mm 30%

[0087] Spinel particle diameter 0-180mm 20%

[0088] Graphite 199 10%

[0089] Graphite 899 5%

[0090] Additive 5%

[0091] Binder 10%

[0092] Its preparation method is as follows:

[0093] S1, batching; Proportion the stopper tip according to the formula by weight percentage;

[0094] S2, mixing materials; put the stopper bar head raw material into the mixer and fully mix it evenly to obtain the mud material;

[0095] S3, volatilization; drying the mud at 60°C until the volatile content is 0.8%;

[0096] S4, trapped material; put the mud material at a constant temperature for 12 hours;

[0097] S5, charging and pressing; the mud after drying is added in the mould, and the mud is pressed into shape by a pressure 100Mpa isostatic press;

[0098] S6, ...

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PUM

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Abstract

The invention discloses a stopper rod head and a preparation method thereof, wherein the stopper rod head comprises spinel particles with different particle sizes, graphite 199, graphite 899, an additive and a binding agent, and specifically comprises, by weight, 30-40% of white corundum 36#, 10-20% of white corundum 80#, 30-40% of white corundum 325#, 10-20% of graphite 199, 5-10% of graphite 899, 5-10% of an additive, and 10-15% of a binder. According to the invention, spinel is adopted to replace previous corundum to serve as the main material of the stopper rod head, and reacts with the additive to generate forsterite or calcium forsterite to seal part of the gas holes in the material, so that the additive is prevented from permeating into the material, the erosion resistance is improved, and the service life of the stopper rod head is prolonged through the special ratio.

Description

technical field [0001] The invention belongs to the technical field of stopper rod heads, and in particular relates to a stopper rod head and a preparation method thereof. Background technique [0002] The stopper rod is mainly used in the continuous casting tundish. It can control the flow of molten steel and open and close during operation. It can also blow argon to the nozzle of the tundish through the middle hole to purify the molten steel and prevent the nozzle from being blocked. In the continuous casting production process, the rod head of the stopper rod is a key part to control the flow of molten steel. The head and body of the existing stopper are integrally composited. The head and body are made of different materials suitable for the rod, and phenolic resin is used as a binder. In the rubber mold, it is molded in isostatic pressure at 125MPa, and after being made into a whole stopper, it is dried, carbon-embedded, reduced and fired, machined to size, sprayed wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/44C04B35/622
CPCC04B35/66C04B35/44C04B35/622C04B2235/425
Inventor 张美杰周九喜高桂航宋振亚钱晓飞姚梦柔
Owner 泰州市旺鑫耐火材料有限公司
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