High corrosion resistant integral stopper for continuous casting

A technology of integral stopper and corrosion resistance, which is applied in the field of carbon-containing refractory materials, can solve the problems of increasing the manufacturing cost of stopper rods, achieve the effects of reducing porosity, reducing erosion, and improving service life

Active Publication Date: 2012-06-27
UNIV OF SCI & TECH LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickening of the stopper rod or the composite zirconium carbon material at the slag line of the rod body will increase the manufacturing cost of the stopper rod

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high-corrosion-resistant integral stopper for continuous casting, which is composed of a rod head and a rod body, and the rod body is composed of the following components in proportion by weight: 18 parts of graphite, 50 parts of magnesium aluminum spinel, 20 parts of 10 parts of aluminum, 1 part of silicon powder, 0.5 part of aluminum powder, 0.5 part of boron carbide, plus 9% of the total weight of the above-mentioned components of phenolic resin. The club head adopts a conventional stopper rod head material, which will not be described in detail here.

[0018] The manufacturing process of the high corrosion resistance integral stopper for continuous casting, the steps are as follows:

[0019] 1) Ingredients: Weigh all kinds of raw materials according to the ingredients list.

[0020] 2) Mixing: Put the prepared materials into a high-speed mixer, add phenolic resin, mix well, and dry for later use.

[0021] 3) Forming: Add the mixed stopper head material and stopp...

Embodiment 2

[0028] A high-corrosion-resistant integral stopper for continuous casting, which consists of a rod head and a rod body, and the rod body is composed of the following components in proportion by weight: 18 parts of graphite, 55 parts of magnesium aluminum spinel, 15 parts of 7 parts of aluminum, 2 parts of silicon powder, 0.5 part of aluminum powder, 2.5 parts of boron carbide, plus 9% of the total weight of the above-mentioned components of phenolic resin. The stick head adopts the conventional stopper stick head material. The manufacturing process of the high corrosion resistance integral stopper for continuous casting is the same as that in Example 1.

[0029] After testing, the physical performance indicators of the stopper rod body are: porosity 12.5%, room temperature flexural strength 14.3Mpa, bulk density 2.60g / cm 3 .

Embodiment 3

[0031] A high-corrosion-resistant integral stopper for continuous casting, which is composed of a rod head and a rod body, and the rod body is composed of the following components in proportion by weight: 20 parts of graphite, 45 parts of magnesium-aluminum spinel, 25 parts of magnesia, oxide 7 parts of aluminum, 2 parts of silicon powder, 1 part of boron carbide, plus 10% of the total weight of the above-mentioned components of phenolic resin. The stick head adopts the conventional stopper stick head material. The manufacturing process of the high corrosion resistance integral stopper for continuous casting is the same as that in Example 1.

[0032] After testing, the physical performance indicators of the stopper rod body are: porosity 12.2%, room temperature flexural strength 13.5Mpa, bulk density 2.58g / cm 3 .

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Abstract

The invention relates to the technical field of carbonaceous refractory materials, especially to a high corrosion resistant integral stopper for continuous casting. The stopper contains a stopper head and a stopper body, wherein the stopper body comprises the following components of: by weight, 15-25 parts of graphite, 20-70 parts of magnesium aluminate spinel, 0-30 parts of magnesia, 0-10 parts of alumina, 1-9 parts of an additive, and phenolic resin which accounts for 8-12% of the total weight of the above ingredients, wherein the additive contains one or more ingredients selected from metal silicon powder, metal aluminium powder and boron carbide. By the optimization of the material of the stopper body, porosity of the stopper body can be reduced, slag penetration resistance can be enhanced, erosion of alkaline slag to the stopper body of the integral stopper can be decreased, and service life of the stopper can be raised.

Description

technical field [0001] The invention relates to the technical field of carbon-containing refractory materials, in particular to a high-corrosion-resistant integral stopper for continuous casting. Background technique [0002] The integral stopper is a key functional refractory material in the production of continuous steel casting. It cooperates with the upper nozzle of the tundish to control the flow of molten steel flowing from the tundish into the crystallizer. In the process of continuous casting, in order to improve the cleanliness of molten steel, an alkaline tundish covering agent is often used to absorb impurities in molten steel; in order to reduce the production cost of continuous casting steel, functions such as the tundish and its supporting integral stopper are required The service life of refractory materials is extended. The service life of the whole stopper directly affects the normal operation of continuous steel casting. [0003] At present, the body of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李轼保李波王仁贵李涛刘绍杰徐全胜徐占魁高玉明
Owner UNIV OF SCI & TECH LIAONING
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