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Dry material and preparation method and application thereof

A dry-type material and raw material technology, applied in the field of iron and steel smelting, can solve the problems such as the decline in the corrosion resistance and mechanical scouring ability of the matrix structure, the unfavorable high-quality steel billet steelmaking requirements, and the impact on the steel billet quality, etc. High temperature resistance, the effect of avoiding environmental pollution

Inactive Publication Date: 2018-01-05
SHANGHAI LIER REFRACTORY MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) At present, mid-grade magnesia is generally used as the main raw material to prepare tundish dry materials. However, with the increasing depletion of magnesia resources and the rapid rise of magnesia prices, the cost of using mid-grade magnesia to prepare tundish dry materials is relatively high
[0006] (2) Using recycled magnesia carbon particles instead of magnesia in the dry material of the tundish can reduce the cost, but the graphite in the magnesia carbon particles is easily oxidized by the oxidizing gas in the air and the iron oxide in the slag, forming a decarburization layer, Lead to matrix structure loosening, erosion resistance and mechanical erosion ability decreased significantly
[0007] (3) Solid phenolic resin is generally added to the dry material of the tundish. The residual carbon and hydrogen generated during the baking of the dry material will add carbon and hydrogen to the molten steel, affect the quality of the billet, and produce a large amount of harmful irritation Gas, pollutes the environment, is not conducive to the steelmaking requirements of clean steelmaking, green and environmentally friendly high-quality steel billets

Method used

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  • Dry material and preparation method and application thereof
  • Dry material and preparation method and application thereof
  • Dry material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] a plus Al 4SiC 4 The environmentally friendly dry material is prepared from the following raw materials:

[0038] Waste magnesium carbon particles: 70Kg; magnesia through a 200-mesh sieve: 18Kg; glucose: 6Kg; borax: 1Kg; Al 4 SiC 4 Powder: 3Kg; metal silicon powder: 1Kg. The waste magnesia-carbon particles are waste magnesia-carbon brick particles, wherein the content of MgO is more than 70%, and the Al 4 SiC 4 Al in powder 4 SiC 4 The content is more than 90%.

[0039] The preparation process of the environment-friendly dry material described in this embodiment: take the raw materials of the above weight; first mix 50% of the magnesia, glucose, borax, Al 4 SiC 4 Powder and metal silicon powder are premixed for 6 minutes, and put into small bags for later use. Then add the waste magnesium carbon particles, the premix and the rest of the magnesia in the order of mixing and kneading for 5 minutes again, and put them into small bags for packaging.

[0040] The d...

Embodiment 2

[0045] a plus Al 4 SiC 4 The environmentally friendly dry material is prepared from the following raw materials:

[0046] Waste magnesium carbon particles: 60Kg; magnesia through a 200-mesh sieve: 30Kg; glucose: 3Kg; borax: 2Kg; Al 4 SiC 4 Powder: 2Kg; metal silicon powder: 0.2Kg. The waste magnesia-carbon particles are waste magnesia-carbon brick particles, wherein the content of MgO is more than 70%, and the Al 4 SiC 4 Al in powder 4 SiC 4 The content is more than 90%.

[0047] The preparation process of the environment-friendly dry material described in this embodiment: take the raw materials of the above weight; first mix 50% of the magnesia, glucose, borax, Al 4 SiC 4 Powder and metal silicon powder are premixed for 6 minutes, and put into small bags for later use. Then add the waste magnesium carbon particles, the premix and the rest of the magnesia in the order of mixing and kneading for 5 minutes again, and put them into small bags for packaging.

[0048] Th...

Embodiment 3

[0052] a plus Al 4 SiC 4 The environmentally friendly dry material is prepared from the following raw materials:

[0053] Waste magnesium carbon particles: 75Kg; magnesia through a 200-mesh sieve: 15Kg; glucose: 6Kg; borax: 1Kg; Al 4 SiC 4 Powder: 5Kg; metal silicon powder: 1Kg;

[0054] The waste magnesia-carbon particles are waste magnesia-carbon brick particles, wherein the content of MgO is more than 70%, and the Al 4 SiC 4 Al in powder 4 SiC 4 The content is more than 90%.

[0055] The preparation process of the environment-friendly dry material described in this embodiment: take the raw materials of the above weight; first mix 50% of the magnesia, glucose, borax, Al 4 SiC 4 Powder and metal silicon powder are premixed for 6 minutes, and put into small bags for later use. Then add the waste magnesium carbon particles, the premix and the rest of the magnesia in the order of mixing and kneading for 5 minutes again, and put them into small bags for packaging.

[0...

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Abstract

The invention relates to a dry material and a preparation method and application thereof. The dry material is mainly prepared from, by weight, 60-75 parts of waste magnesium-carbon particles, 15-30 magnesium sand, 3-6 parts of carbohydrate binding agent, 1-2 parts of sintering aids, 2-5 parts of Al4SiC4 powder and 0-1 part of other antioxidant. The dry material has the advantages of resisting oxidation and erosion and being low in cost and environmentally friendly. According to the preparation method, the dry material can be obtained through simple mixing processes, and therefore the method has the advantages of being simple to operate and providing more convenience for large-scale production. By applying the dry material, the service life of tundishes can be effectively prolonged, waste and costs are reduced, and meanwhile no pollution is caused to environment, and therefore the dry material has significant economic benefits and environmental protection benefits.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a dry material, its preparation method and application. Background technique [0002] The tundish is a refractory container between the continuous casting ladle and the crystallizer. In the initial stage of continuous casting, the tundish was only used as a storage and distributor for molten steel from the ladle to the crystallizer. Pollution, prevention of secondary oxidation of molten steel, prevention of refractory corrosion and ladle eddy slag entanglement play an important role in stabilizing continuous casting production and improving the quality of continuous casting slabs. [0003] 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/02
Inventor 李勇伟李洪波汪正峰颜浩邹新国李维锋王勇进
Owner SHANGHAI LIER REFRACTORY MATERIAL
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