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High-magnesium refractory material for tundish

A refractory, high-magnesium technology, applied in the field of refractories, can solve the problems of poor corrosion resistance, free aldehyde pollution, etc., to improve thermal shock stability and slag corrosion resistance, improve thermal shock stability, The effect of improving bond strength

Inactive Publication Date: 2018-02-13
浙江攀盛冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of improved comprehensive metallurgical performance, energy-saving and consumption-reducing, reducing environmental pollution, heat-shock-resistant and used in the middle of high magnesia refractories

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-magnesia refractory material for a tundish, the refractory material includes, in parts by weight: 85 parts of 3-5mm magnesia, 65 parts of 0.5-1mm magnesia, 45 parts of 0.02-0.1mm magnesia, and the particle size is 120 parts of 180-mesh magnesia, 12 parts of alumina micropowder, 5 parts of rare earth-doped magnesia partially stabilized zirconia micropowder, 5 parts of silicon micropowder, 3 parts of additive and 2 parts of bismuth oxide.

[0032] The additive is regenerated polystyrene hollow microspheres and ferrocene with a mass ratio of 1:2-5.

[0033] The preparation steps of the regenerated polystyrene hollow microspheres are as follows:

[0034] a) In parts by weight, mix 1 part of sodium dodecylbenzenesulfonate with distilled water at a ratio of 1:4.5, and use it as the W1 phase;

[0035] b) 20 parts of waste polystyrene foam boards were placed in 15 parts of sorbitan fatty acid ester and ultrasonically stirred for 15-20 min, and used as the W0 phase;

[...

Embodiment 2

[0045] A high-magnesia refractory material for a tundish. The refractory material includes, in parts by weight, 90 parts of 3-5mm magnesia, 60 parts of 0.5-1mm magnesia, 40 parts of 0.02-0.1mm magnesia, and the particle size is 128 parts of 180-mesh magnesia, 22 parts of alumina micropowder, 8 parts of rare earth-doped magnesia partially stabilized zirconia micropowder, 7 parts of silicon micropowder, 5 parts of additives and 2.5 parts of bismuth oxide.

[0046] The additive is regenerated polystyrene hollow microspheres and ferrocene with a mass ratio of 1:2-5.

[0047] The preparation steps of the regenerated polystyrene hollow microspheres are as follows:

[0048] a) In parts by weight, mix 1 part of sodium dodecylbenzenesulfonate with distilled water at a ratio of 1:4.5, and use it as the W1 phase;

[0049] b) 20 parts of waste polystyrene foam boards were placed in 15 parts of sorbitan fatty acid ester and ultrasonically stirred for 15-20 min, and used as the W0 phase; ...

Embodiment 3

[0059] A high-magnesia refractory material used in a tundish, the refractory material includes in parts by weight: 95 parts of 3-5mm magnesia, 55 parts of 0.5-1mm magnesia, 35 parts of 0.02-0.1mm magnesia, the particle size is 135 parts of 180-mesh magnesia, 25 parts of alumina micropowder, 10 parts of rare earth-doped magnesia partially stabilized zirconia micropowder, 10 parts of silicon micropowder, 8 parts of additives and 3 parts of bismuth oxide.

[0060] The additive is regenerated polystyrene hollow microspheres and ferrocene with a mass ratio of 1:5.

[0061] The preparation steps of the regenerated polystyrene hollow microspheres are as follows:

[0062] a) In parts by weight, mix 1 part of sodium dodecylbenzenesulfonate with distilled water at a ratio of 1:4.5, and use it as the W1 phase;

[0063] b) 20 parts of waste polystyrene foam boards were placed in 15 parts of sorbitan fatty acid ester and ultrasonically stirred for 15-20 min, and used as the W0 phase;

[...

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Abstract

The invention relates to a high-magnesium refractory material for a tundish. The refractory material comprises 3-5 mm of magnesia, 0.5-1 mm of magnesia, 0.02-0.1 mm of magnesia, magnesia with a particle size of 180 meshes, bauxite micro-powder, rare earth-doped magnesium oxide-partially stabilized zirconia micro-powder, silicon micro-powder, an additive and bismuth oxide. The main effects of the bismuth oxide and the additive in the high-magnesium refractory material are to reduce the stress concentration and improve the thermal shock stability of products; the main effects of the rare earth-doped magnesium oxide-partially stabilized zirconia micro-powder are to improve the bonding strengths of the products and improve the thermal shock stability and the corrosion resistance to slag of theproducts; therefore, a carbon-free brick for a steel ladle, obtained by adopting the raw material ratio of the invention, has the characteristics of being free from pollution, high in normal temperature and high temperature strength, good in thermal shock stability and the like and can meet the production demands of low carbon and ultra-low carbon steels.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a high-magnesia refractory material used in tundishes with high temperature resistance, corrosion resistance, thermal shock resistance and wear resistance. Background technique [0002] In recent years, with the rapid development of high-efficiency continuous casting steelmaking technology and the use of rapid nozzle replacement technology, the requirements for the working lining of the tundish are getting higher and higher. The working lining of the tundish has changed from silicon insulation boards to alkaline refractory materials mainly composed of magnesia, forsterite, and calcium-containing raw materials. Using a higher and higher proportion of dry material, the service life of the working lining of the tundish is getting higher and higher. [0003] At present, the tundish dry material combined with solid phenolic resin widely used in steel mills is a refract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3206C04B2235/3217C04B2235/3246C04B2235/3298C04B2235/3418C04B2235/77C04B2235/96C04B2235/9607C04B2235/9669
Inventor 江群英施永益张新财
Owner 浙江攀盛冶金材料有限公司
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