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Anti-permeation type tundish light coating and preparation method thereof

A tundish and anti-permeation technology, which is applied in the field of monolithic refractory materials, can solve the problems of poor erosion resistance, lower coating refractoriness, serious coating sintering, etc., and achieve excellent sintering resistance and disintegration performance, and service life The effect of long, low melt and less

Active Publication Date: 2015-01-28
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the high-temperature slag penetrates into the coating, a large amount of liquid phase will be generated. On the one hand, the refractoriness of the coating will be greatly reduced, and the corrosion resistance will be deteriorated; It reduces the labor intensity of the workers and also affects the normal turnover of the tundish

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  • Anti-permeation type tundish light coating and preparation method thereof

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preparation example Construction

[0028] The preparation method of the anti-penetration type tundish lightweight coating in embodiment 1-embodiment 7 comprises the steps:

[0029] (1) Embodiment 1-embodiment 7 prepares raw material according to table 1;

[0030] (2) Add composite fibers to the main raw materials of magnesia and / or forsterite, and stir vigorously in a forced mixer for 5-10 minutes to eliminate fiber clumping;

[0031] (3) Then add quartz sand, sulfamic acid, organic plasticizer, high-efficiency air-entraining agent and metal aluminum powder and mix and grind for 10-15 minutes;

[0032] (4) During on-site construction, directly add 25wt% water of the total mass of the raw materials in step (1) and stir evenly, then manually apply or machine spray, and can also be combined with other coatings for internal and external composite construction as required.

Embodiment 1

[0035] In Example 1:

[0036] The particle gradation composition of the magnesia is: 24.705 kg of particles with a particle size greater than 0.5 mm and less than or equal to 1 mm, 21.045 kg of particles with a particle size greater than 0.2 mm and less than or equal to 0.5 mm, and 21.045 kg of particles with a particle size greater than 0.088 mm and less than or equal to The particle size of 0.2mm is 16.47 kg, and the particle size is less than or equal to 0.088 mm is 29.28 kg. The weight percentage of MgO in the magnesia is 93wt%.

[0037]The particle gradation composition of the quartz sand is: 0.125 kg of particles with a particle size greater than 0.2 mm and less than or equal to 0.5 mm, 0.15 kg of particles with a particle size greater than 0.088 mm and less than or equal to 0.2 mm, and 0.15 kg of particles with a particle size of less than or equal to 0.088 mm The pellets are 0.225 kg.

[0038] In the sulfamic acid: the mass of particles with particle size less than o...

Embodiment 2

[0039] In Example 2:

[0040] The particle gradation composition of the magnesia is: 23.22 kg of particles with a particle size greater than 0.5 mm and less than or equal to 1 mm, 19.78 kg of particles with a particle size greater than 0.2 mm and less than or equal to 0.5 mm, and 19.78 kg of particles with a particle size greater than 0.088 mm and less than or equal to 0.2mm particles are 15.48 kg, and particles with a particle size less than or equal to 0.088 mm are 27.52 kg. The weight percentage of MgO in the magnesia is 93wt%.

[0041] The particle gradation composition of the quartz sand is as follows: 1.5 kg of particles with a particle size greater than 0.2 mm and less than or equal to 0.5 mm, 1.8 kg of particles with a particle size greater than 0.088 mm and less than or equal to 0.2 mm, and 1.8 kg of particles with a particle size of less than or equal to 0.088 mm The pellets are 2.7 kg.

[0042] In the sulfamic acid: the mass of particles with particle size less th...

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Abstract

The invention discloses an anti-permeation type tundish light coating and a preparation method thereof. The anti-permeation type tundish light coating comprises the following components in parts by weight: 73-99 parts of magnesite and / or forsterite with the granularity less than or equal to 1mm, 0.1-15 parts of quartz sand, 0.2-4 parts of sulfamic acid, 0.1-3.0 parts of an organic plasticizer agent, 0.5-5 parts of composite fiber, 0.02-0.25 part of high-efficiency air entraining agent and 0.01-0.15 part of metal aluminum powder. The coating disclosed by the invention is small in volume density, high in pressure resisting intensity after being baked, small in low melt and capable of effectively preventing slag permeation and solving the problems of a conventional light coating in construction, baking and use.

Description

technical field [0001] The invention relates to the technical field of monolithic refractory materials, in particular to an anti-permeation type tundish lightweight coating and a preparation method thereof. Background technique [0002] The tundish coating is mainly made of magnesia or forsterite, which is a one-time use product, and the annual consumption is very large. With the depletion of refractory resources such as magnesia and the urgent need of the national energy conservation and environmental protection strategy, tundish coatings have gradually changed from heavy (1.8 to 2.4g / cm 3 ) to light weight (1.2~1.8g / cm 3 ) direction of development, with obvious material saving, anti-burst and excellent thermal insulation performance and so on. However, traditional lightweight coatings for tundishes have high porosity and large pore size, significantly lower product strength, are prone to collapse during construction or baking, and have poor impermeability. In order to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 陈昌平宋世锋王文学孙荣海
Owner PUYANG REFRACTORIES GRP CO LTD
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