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Converter low-carbon magnesia carbon brick with water-resisting layer and preparation method thereof

A technology of carbon-magnesia-carbon bricks and magnesia-carbon bricks, which is applied in the field of converter low-carbon magnesia-carbon bricks and its preparation, can solve the problems of insufficient service life and waterproof performance of magnesia-carbon bricks, and achieve improved oxidation resistance, quality, and safety effect

Active Publication Date: 2021-08-31
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a converter low-carbon magnesia-carbon brick with a water-proof layer for the problems of insufficient service life and waterproof performance of the existing magnesia-carbon bricks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A converter low-carbon magnesia-carbon brick with a water-repellent layer, which comprises a magnesia-carbon brick body and a water-repellent coating arranged on its surface, and its preparation method includes the following steps:

[0033] 1) The raw materials are weighed according to the proportion, and the raw materials in the magnesia-carbon brick body and their mass percentages are: 58% of magnesia particles, 8% of magnesia fine powder, 2% of graphitized carbon black superfine powder, zirconium English sand 14% (zircon sand 10%, zircon sand fine powder 4%), silicon nitride iron powder 4%, flake graphite 8%, zinc borate 1%, magnesium manganese zinc alloy powder 3%, phenolic resin 2% Add diluent (ethylene glycol) 3%; Each component and its mass percentage in the water-proof coating used for local smearing of magnesia-carbon bricks are: paraffin wax 70%, glass powder 30%;

[0034] 2) When making bricks, add the graphitized carbon black superfine powder that has been w...

Embodiment 2

[0038] A converter low-carbon magnesia-carbon brick with a water-repellent layer, which comprises a magnesia-carbon brick body and a water-repellent coating arranged on its surface, and its preparation method includes the following steps:

[0039] 1) The raw materials are weighed according to the proportioning ratio. The raw materials in the magnesia-carbon brick body and their mass percentages are: magnesia particles 60%, magnesia fine powder 16%, graphitized carbon black superfine powder 6%, zirconium British sand 7% (zircon sand particles), silicon nitride iron powder 2%, flake graphite 3%, zinc borate 2%, magnesium manganese zinc alloy powder 2%, phenolic resin 2%, plus diluent (ethylene glycol) 2%; the components and their mass percentages in the water-proof coating used for partial coating of magnesia-carbon bricks are: paraffin wax 60%, glass powder 40%;

[0040] 2) When making bricks, add the graphitized carbon black superfine powder that has been weighed into the mixe...

Embodiment 3

[0044] A converter low-carbon magnesia-carbon brick with a water-repellent layer, which comprises a magnesia-carbon brick body and a water-repellent coating arranged on its surface, and its preparation method includes the following steps:

[0045]1) The raw materials are weighed according to the proportioning ratio. The raw materials in the magnesia-carbon brick body and their mass percentages are: magnesia particles 60%, magnesia fine powder 22%, graphitized carbon black superfine powder 8%, zirconium 5% English sand (zircon sand particles), 1% silicon nitride iron powder, 1% flake graphite, 0.5% zinc borate, 1.5% magnesium manganese zinc alloy powder, 1% phenolic resin, plus diluent (dimethyl silicone oil ) 3%; the components and their mass percentages in the water-proof coating used for local coating of magnesia-carbon bricks are: paraffin 45%, glass powder 55%;

[0046] 2) When making bricks, add the graphitized carbon black superfine powder that has been weighed into the ...

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Abstract

The invention discloses a converter low-carbon magnesia carbon brick with a water-resisting layer. The converter low-carbon magnesia carbon brick comprises a magnesia carbon brick body and a water-resisting coating arranged on the surface of the magnesia carbon brick body, wherein the magnesia carbon brick body comprises the following raw materials in percentage by mass: 55-72% of magnesia particles, 7-22% of magnesia fine powder, 4-15% of zircon sand, 1-4% of ferro-silicon nitride powder, 1-8% of crystalline flake graphite, 0.5-3% of zinc borate, 1-3% of magnesium-manganese-zinc alloy powder, and 1-4% of phenolic resin; and the waterproof coating comprises the following raw materials in percentage by mass: 45-70% of paraffin and 30-55% of glass powder. The obtained low-carbon magnesia carbon brick has good use performance, oxidation resistance and safety performance, and the service life of the low-carbon magnesia carbon brick under the condition that the final oxygen content of molten steel of a converter is high can be effectively prolonged; the preparation method is relatively simple and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and refractory materials, and in particular relates to a converter low-carbon magnesia-carbon brick with a water-proof layer and a preparation method thereof. Background technique [0002] During the converter smelting process, molten iron, scrap steel and slag will erode and damage the furnace lining, resulting in the thinning of the working lining magnesia-carbon bricks, especially the increase in the ratio of scrap steel in modern steelmaking processes, and the erosion of magnesia-carbon bricks is more serious. In addition, the phenomenon of water leakage from the hood of the converter also occurs from time to time. Excessive water infiltrates into the lining brick layer of the converter, which will seriously damage the lining structure and shorten the service life of the lining. [0003] The increase of scrap steel ratio in modern steelmaking process will greatly increase the amount of scr...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B41/85
CPCC04B35/0435C04B41/85C04B41/009C04B41/5022C04B2235/424C04B2235/3427C04B2235/3873C04B2235/425C04B2235/3409C04B2235/40C04B2235/96C04B2235/9684C04B41/478
Inventor 张洪雷肖邦志周利刚刘黎徐国涛周旺枝
Owner 武汉钢铁有限公司
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