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Light tundish working lining and method for preparing same

A tundish and working lining technology, applied in the field of refractory materials, can solve the problems of excessive consumption of resources, slow erosion of volume density, etc., and achieve the effect of improving anti-erosion performance

Active Publication Date: 2018-09-14
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to provide a lightweight tundish working lining with low bulk density, slow erosion speed, long life, low cost, low consumption and energy saving and its preparation method to solve the current refractory raw materials ( Including waste magnesia carbon brick recycled materials, etc.) Excessive consumption of resources, energy saving and heat preservation

Method used

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  • Light tundish working lining and method for preparing same
  • Light tundish working lining and method for preparing same
  • Light tundish working lining and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The intermediate working lining ingredients are composed of the following components: 60 kg of waste magnesia carbon bricks, 25 kg of magnesite tailings, 5 kg of sintered corundum, 1.1 kg of newspaper fibers, 5.3 kg of phenolic resin, and silicon metasilicon pentahydrate Sodium acid is 1.5 kilograms, silicon micropowder is 0.7 kilograms, and metallic aluminum powder is 1.4 kilograms.

[0052] The particle size gradation of waste magnesia carbon bricks is as follows: the content of waste magnesia carbon bricks with a particle size greater than or equal to 0.2mm and less than or equal to 0.5mm is 45wt% of the total mass of waste magnesia carbon bricks, and the waste magnesia carbon bricks with a particle size greater than or equal to 0.2mm The content of magnesia-carbon bricks is 55wt% of the total mass of waste magnesia-carbon bricks; in the waste magnesia-carbon bricks: the content of MgO ≥ 70.0wt% of the total mass of waste magnesia-carbon bricks, the content of C ≥ the...

Embodiment 2

[0066]The intermediate working lining ingredients are composed of the following components: 70 kg of waste magnesia carbon bricks, 13 kg of magnesite tailings, 6.5 kg of fused white corundum, 1.9 kg of newspaper fibers, and 0.3 kg of alkali-free chopped glass fibers kg, 1.0 kg for phenolic resin, 0.5 kg for magnesium sulfate heptahydrate, 3.0 kg for silica micropowder, 1.7 kg for aluminate cement, and 2.1 kg for metal aluminum powder.

[0067] The particle size gradation of waste magnesia carbon bricks is as follows: the content of waste magnesia carbon bricks with a particle size greater than or equal to 0.2mm and less than or equal to 0.5mm is 60wt% of the total mass of waste magnesia carbon bricks, and the waste magnesia carbon bricks with a particle size greater than or equal to 0.2mm The content of magnesia-carbon bricks is 40wt% of the total mass of waste magnesia-carbon bricks; in the waste magnesia-carbon bricks: the content of MgO ≥ 70.0wt% of the total mass of waste m...

Embodiment 3

[0082] The intermediate working lining ingredients are composed of the following components: In this embodiment, on the basis of the ingredients in Example 1, admixtures are added, and the amount of admixtures added is 1.5wt% of the total mass of the ingredients in Example 1. The particle size is 1-50nm, and the admixture is composed of three kinds of zircon tailings, waste chrome bricks and potassium feldspar. The mass ratio of zircon tailings, waste chrome bricks and potassium feldspar is 4:2:1.

[0083] In this example, the working lining of the lightweight tundish is prepared by dry vibration molding, which specifically includes the following steps:

[0084] ① Prepare raw materials according to the above-mentioned light tundish working lining;

[0085] ②Pour the waste magnesia carbon brick, the magnesite tailings, and the sintered corundum into a forced mixer according to the raw material ratio in ① and mix evenly;

[0086] ③ Add the newspaper fiber according to the propo...

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Abstract

The invention discloses a light tundish working lining and a method for preparing the same. Ingredients for the light tundish working lining comprise waste magnesia-carbon bricks, magnesite tailing, aluminum oxide, fibers, compound bonding agents and additives. The method for preparing the light tundish working lining includes dry vibration forming or wet smearing forming. The light tundish working lining and the method have the advantages that the light tundish working lining prepared by the aid of the method is low in volume density, erosion rate, cost and consumption and long in service life, energy can be saved, and the like. Besides, the problem of excessive consumption of resources of existing refractory raw materials (including waste magnesia-carbon brick reclaimed materials and thelike), the problems in the aspects of energy conservation and heat preservation and the like can be solved by the aid of the light tundish working lining and the method.

Description

technical field [0001] The present invention relates to refractory materials. Specifically, it is a lightweight tundish working lining and a preparation method thereof. Background technique [0002] The continuous casting tundish generally adopts alkaline magnesia refractory material as the working lining, which is widely used because of its high refractoriness, strong corrosion resistance and no pollution to molten steel. However, as the country has introduced a series of targeted treatment and shutdown measures for high-pollution and high-emission enterprises, the refractory industry has been greatly affected. In order to realize the full utilization of resources, in recent years, there have been gradually reports of invention patents on using waste magnesia carbon bricks as raw materials to prepare tundish working linings, such as "a dry material using waste magnesia carbon bricks as raw materials and its preparation method" (CN10291092 4A , 2012), "Classified recycling...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B33/13C04B33/132C04B33/36
CPCC04B33/1305C04B33/131C04B33/132C04B33/1324C04B33/36C04B35/63476C04B35/66C04B2235/3217C04B2235/3418C04B2235/3472C04B2235/402C04B2235/5212C04B2235/5264C04B2235/77C04B2235/96C04B2235/9607Y02P40/60
Inventor 陈昌平孙荣海王文学宋世锋
Owner PUYANG REFRACTORIES GRP CO LTD
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