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A kind of lightweight tundish working lining and preparation method thereof

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: 2020-08-04
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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  • A kind of lightweight tundish working lining and preparation method thereof
  • A kind of lightweight tundish working lining and preparation method thereof
  • A kind of lightweight tundish working lining and preparation method thereof

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 magnesite carbon bricks, 25 kg of magnesite tailings, 5 kg of sintered corundum, 1.1 kg of newspaper fiber, 5.3 kg of phenolic resin, and pentahydrate silica The sodium is 1.5 kg, the silicon powder is 0.7 kg, and the metal aluminum powder is 1.4 kg.

[0052] The said waste magnesia carbon brick particle size gradation is: the waste magnesia carbon brick with a particle size greater than or equal to 0.2mm and less than or equal to 0.5mm contains 45wt% of the total mass of the waste magnesia carbon brick, and the waste with a particle size greater than 0 and less than 0.2mm The content of magnesia-carbon bricks is 55wt% of the total mass of the waste magnesia-carbon bricks; in the waste magnesia-carbon bricks: the content of MgO≥70.0wt% of the total mass of the waste magnesia-carbon bricks, and the content of C≥the total mass of the waste magnesia-carbon bricks 10.0wt%, Al 2...

Embodiment 2

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

[0067] The said waste magnesia carbon brick particle size gradation is: the waste magnesia carbon brick with a particle size greater than or equal to 0.2mm and less than or equal to 0.5mm contains 60wt% of the total mass of the waste magnesia carbon brick, and the waste with a particle size greater than 0 and less than 0.2mm The content of magnesia-carbon bricks is 40wt% of the total mass of waste magnesia-carbon bricks; in the said waste magnesia-carbon bricks: the content of MgO≥70.0wt% of the total mass of the waste magnesia-carbon bricks; the content of C≥t...

Embodiment 3

[0082] The intermediate working lining ingredients are composed of the following components: In this example, on the basis of the ingredients of Example 1, an admixture is added. The addition amount of the admixture is 1.5wt% of the total mass of the ingredients in Example 1. With a particle size of 1-50nm, the additive is a composite of zircon tailings, waste chrome bricks and potash feldspar. The mass ratio of zircon tailings, waste chrome bricks and potash feldspar is 4:2:1.

[0083] In this embodiment, the light-weight tundish working lining is prepared by dry vibration molding, which specifically includes the following steps:

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

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

[0086] ③Add the newspaper fiber according to the ratio of raw materials in ①, a...

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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 uses alkaline magnesia refractory material as the working lining, which is widely used due to its high refractoriness, strong corrosion resistance and no pollution to molten steel. However, as the state has introduced a series of targeted governance and shutdown measures for high-pollution and high-emission enterprises, the refractory industry has been greatly affected. In order to make full use of resources, in recent years, there have been reports of invention patents 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), "Grading recycling of waste magnesia-carbon bricks and tundis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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