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Anti-adhesive coating and monolithic stopper using anti-adhesive coating

A technology of anti-sticking coating and integral stopper, which is applied in the direction of coating, casting melt container, manufacturing tools, etc. It can solve the problems of anti-scouring, poor anti-erosion performance, high viscosity of glaze layer, large loss, etc., so that it is not easy to fall off Abrasion, not easy to fall off, high refractoriness effect

Active Publication Date: 2015-04-08
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Around the 1990s, the overall stopper rod was usually made of low-alumina and high-graphite material. This material did not have very strict requirements for baking, and slight oxidation did not have a great influence on the strength. However, its disadvantages were poor adaptability to molten steel, erosion resistance, Poor corrosion resistance and short service life
However, this kind of glaze layer has a high viscosity. If the tundish is not used immediately after the tundish is baked, the contact surface between the head of the stopper rod and the bowl of the tundish nozzle will cause the glaze layer to solidify due to the temperature drop, resulting in The refractory material sticks together as a whole, and the stopper rod is lifted to turn around or the entire upper nozzle of the tundish is pulled out from the bottom of the ladle, resulting in failure to start pouring smoothly or interruption of pouring, and the molten steel is returned to the furnace, resulting in huge losses

Method used

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  • Anti-adhesive coating and monolithic stopper using anti-adhesive coating

Examples

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preparation example Construction

[0021] The anti-adhesive coating is prepared by crushing white corundum, clay and aluminum oxide through a 280-mesh or finer sieve, mixing uniformly according to the stated ratio, and then taking white dextrin and adding water according to the stated ratio and stirring evenly to obtain a sticky coating. Add agent, then pour in the mixed powder and stir evenly.

[0022] Such as figure 1 As shown, the integral stopper rod of the present invention includes a stopper rod body 1, a stopper rod head 2 and an anti-oxidation layer 3, the stopper rod body 1 and the stopper rod head 2 are integrally structured, and the outer surface of the stopper rod head 2 The anti-stick coating layer 4, the thickness of the anti-stick coating layer 4 should be 0.8-1.2mm. Its production is that the stopper body 1 and the stopper head 2 are manufactured integrally according to the conventional method, and a layer of anti-oxidation coating 3 is sprayed on the outer surface. Then the adhesive and solid...

Embodiment 1

[0024] The anti-stick coating of the present invention is mixed by high temperature resistant 200# white corundum, clay, aluminum oxide, and binder, and the proportioning by weight of described white corundum, clay, alumina, and binder can be: white corundum 70 10 parts of clay, 8 parts of alumina, and 1 part of binder. The binder is prepared by mixing water and white dextrin in a weight ratio of 40:60. The white corundum is preferably high temperature-resistant 200# white corundum, and the clay should be clay with high viscosity. The anti-adhesive coating is prepared by crushing white corundum, clay and aluminum oxide through a 280-mesh or finer sieve, mixing uniformly according to the stated ratio, and then taking white dextrin and adding water according to the stated ratio and stirring evenly to obtain a sticky coating. Add agent, then pour in the mixed powder and stir evenly.

[0025] The integral stopper made of the anti-sticking coating includes a stopper body 1, a sto...

Embodiment 2

[0027] In the anti-sticking coating of the present invention, the proportioning by weight of described white corundum, clay, aluminum oxide, binding agent is: white corundum 75 parts, clay 1 5 10 parts, 10 parts of aluminum oxide, 2 parts of binding agent; Said binding agent can press 4 5 : 55 The weight ratio is mixed and prepared; the thickness of the anti-adhesive coating layer 4 at the stopper tip 2 of the integral stopper can be 0.8-1.2mm, and the preparation method of the anti-adhesive coating and the integral stopper of the present embodiment is the same as that of Example 1 .

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Abstract

The invention discloses an anti-adhesive coating and a monolithic stopper using the anti-adhesive coating. The anti-adhesive coating is prepared from white corundum, clay, aluminum oxide and a binding agent, and the outer surface of the stopper head of the monolithic stopper is coated with the anti-adhesive coating layer. The anti-adhesive coating layer has the advantages of good scouring resistance, erosion resistance and sudden heat and cold resistance, adhesion between the stopper and an intermediate tundish nozzle can be effectively avoided, normal casting start of continuous casting production is guaranteed, and the service life of the stopper and the water gap is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of functional composite refractories for steelmaking and continuous casting, and in particular relates to an anti-adhesive coating and an integral stopper rod for continuous casting molten steel flow control using the anti-adhesive coating. Background technique [0002] In the field of iron and steel metallurgy production, the long nozzle, the integral stopper rod and the submerged nozzle are collectively called the three major functional refractory parts of continuous casting. Among them, the integral stopper rod is fixedly installed on the tundish containing molten steel by a mechanical arm, the upper nozzle of the tundish is built at the bottom of the nozzle of the tundish, and the head of the stopper rod cooperates with the bowl of the upper nozzle of the tundish to control the flow of molten steel. The integral stopper rod and the upper nozzle of the tundish must be baked at high temperature before use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/00B22D41/18
Inventor 李书成李伟峰王英杰杨英杰宋志刚
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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