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Tundish dry working lining with anti-swelling and cracking and preparation method thereof

A working lining and anti-expansion technology, applied in the field of refractory materials, can solve the problems of drilling steel, collapse, cracking, etc., and achieve the effect of reducing stiffness, reducing stress concentration, and improving safety performance

Active Publication Date: 2019-08-16
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide an anti-expansion cracking tundish dry-type working lining and its preparation method to solve the problem of cracking and steel drilling caused by expansion and oxidation of the traditional magnesia tundish dry-type working lining during baking and use. and collapse issues

Method used

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  • Tundish dry working lining with anti-swelling and cracking and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A tundish dry working lining with anti-expansion and cracking, consisting of the following components:

[0028] The particle size of the composite resin powder is 1-150nm, the composite resin powder is phenolic resin, the mass fraction is 4.0wt%, and the mass percentage of hexamethylenetetramine in the phenolic resin powder is 10%.

[0029] The magnesia particles whose particle size is greater than 3mm and less than or equal to 5mm account for 19wt%, the magnesia particles whose particle size is greater than 1mm and less than or equal to 3mm account for 17wt%, and the magnesia particles whose particle size is greater than 0.088mm and less than or equal to 1mm account for 10wt%. The magnesia particle whose particle size is less than or equal to 0.088mm accounts for 28wt%, and the magnesia used is 95 dead-burned magnesia. The particle density of the magnesia is greater than or equal to 3.2g cm －3 .

[0030]The magnesite particles with a particle size of 1-3mm account fo...

Embodiment 2

[0036] A tundish dry working lining with anti-expansion and cracking, consisting of the following components:

[0037] The particle size of the composite resin powder is 1-150nm, and the composite resin powder is phenolic resin with a mass fraction of 3.0wt%. The mass percentage of hexamethylenetetramine in the phenolic resin powder is 6%.

[0038] The magnesia particles whose particle size is greater than 3mm and less than or equal to 5mm account for 16wt%, the magnesia particles whose particle size is greater than 1mm and less than or equal to 3mm account for 18wt%, and the magnesia particles whose particle size is greater than 0.088mm and less than or equal to 1mm account for 15wt%. The magnesia used is 95 dead-burned magnesia; magnesia particles with a particle size less than or equal to 0.088 mm account for 29 wt%, and the magnesia used is 97 fused magnesia. The particle density of the magnesia is greater than or equal to 3.2g cm －3 .

[0039] The magnesite particles wi...

Embodiment 3

[0045] A tundish dry working lining with anti-expansion and cracking, consisting of the following components:

[0046] The particle size of the composite resin powder is 1-150nm, the composite resin powder is phenolic resin, the mass fraction is 4.0wt%, and the mass percentage of hexamethylenetetramine in the phenolic resin powder is 16%.

[0047] The magnesia particles whose particle size is greater than 3mm and less than or equal to 5mm account for 16wt%, the magnesia particles whose particle size is greater than 1mm and less than or equal to 3mm account for 5wt%, and the magnesia particles whose particle size is greater than 0.088mm and less than or equal to 1mm account for 5wt%. The magnesia particle whose particle size is less than or equal to 0.088mm accounts for 28wt%, and the magnesia is 91 dead-burned magnesia. The particle density of the magnesia is greater than or equal to 3.2g cm －3 .

[0048] Dolomite particles with a particle size of 1-3mm account for 18%, and ...

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Abstract

The invention discloses an antiswelling anticracking tundish dry working lining and a preparation method thereof. The tundish dry working lining comprises the following components in percentage by weight: 50-90% of magnesite sand with the particle size less than or equal to 5mm, 5-45% of magnesite or dolomite with the particle size less than or equal to 3mm, 0.1-2.5% of combustible fibers, 1.5-6.0% phenolic resin powder and 0.1-3.0% of a composite additive. The antiswelling anticracking tundish dry working lining disclosed by the invention has the advantages that swelling degree of the tundish dry working lining in baking and using processes is reduced, stress concentration and rigidity after curing of a lining material are reduced, oxidation time of a binding agent carbon net is delayed, cracking, steel drilling, caving and the like in the baking and using processes of the material are effectively prevented, and safety performance of a continuous casting tundish is greatly improved while excellent corrosion resistance and sintering resistance are maintained.

Description

technical field [0001] The invention relates to the field of refractory materials. More specifically, it relates to a tundish dry working lining with anti-expansion cracking and a preparation method thereof. Background technique [0002] The continuous casting tundish working lining widely uses magnesia as the main raw material and phenolic resin powder as the binder. It is molded by tire mold vibration and heating and curing on site. (1000-1100°C) can be put into use after baking. Because of its convenient construction, short baking time, and excellent corrosion resistance and sintering resistance, it is still the first choice of refractory working lining for continuous casting tundishes at home and abroad. However, the temperature rise process of this kind of working lining is sharp and discontinuous when it is poured from normal temperature to medium fire, medium fire to high fire, and high fire to molten steel. , will face the risk of cracking and collapse due to poor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/043
CPCC04B35/043C04B38/067C04B38/0675C04B2235/3208C04B2235/3418C04B2235/402C04B2235/425C04B2235/428C04B2235/5427C04B2235/5436
Inventor 陈昌平孙荣海王文学宋世锋刘百宽
Owner PUYANG REFRACTORIES GRP CO LTD
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