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-p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] A low-carbon-magnesium carbon tile with a hydrated layer, which includes a magnesium carbon brick body and a water coating disposed on its surface, and the preparation method comprises the steps of:

[0033] 1) Take each raw material according to the ratio, the raw materials in the magnesium carbon bricks and the mass percentage of mass: magnesium sand particles 58%, magnesium sand fine powder 8%, graphitized carbon black super fine powder 2%, zirconium Military sand 14% (zirconia sand 10%, zirconia sand fine powder 4%), silicon nitride iron powder 4%, scaly graphite 8%, 1% borate zinc acid, 3% magnesium manganese, 2% phenolic resin ; 3% diluent (ethylene glycol); each component of the water-absorbing coating used by the magnesium carbon bricks and the percentage of mass of the mass: paraffin 70%, glass powder 30%;

[0034] 2) When the brick, the graphitic carbon black ultrafine powder weighing will be added to the mixed phenolic resin and ethylene glycol...

Example Embodiment

[0037] Example 2

[0038] A low-carbon-magnesium carbon tile with a hydrated layer, which includes a magnesium carbon brick body and a water coating disposed on its surface, and the preparation method comprises the steps of:

[0039] 1) Take each raw material according to the ratio, the raw materials in the magnesium carbon bricks and the percentage of mass of the magnesium sand particles are 60%, magnesium sand powder 16%, graphitized carbon black super fine powder 6%, zirconium Shar sand 7% (zirconium sand particles), 2% silicon nitride iron powder, 3% of scale graphite, 2% borate acid, 2% of magnesium manganese, 2% phenolic resin, external diluent (ethylene glycol) 2%; the components of the water-absorbing coating used by the magnesium carbon bricks and their percentages are: 40% paraffin, 40% of glass powder;

[0040] 2) When the brick, the graphitic carbon black ultrafine powder weighing will be added to the mixed phenolic resin and ethylene glycol, and then magnesium sand pa...

Example Embodiment

[0043] Example 3

[0044] A low-carbon-magnesium carbon tile with a hydrated layer, which includes a magnesium carbon brick body and a water coating disposed on its surface, and the preparation method comprises the steps of:

[0045]1) Tell each raw material according to the ratio, the raw materials in the magnesium carbon bricks and the mass percentage of mass: magnesium sand particles 60%, magnesium sand fine powder 22%, graphitized carbon black super fine powder 8%, zirconium 5% of the sand sand (zirconium sand particles), 1% silicon nitride iron powder, 1% scale graphite, 0.5% boric acid, 1.5% magnesium manganese powder powder, 1% phenolic resin, external diluent (dimethyl silicone oil 3%; the components of the water-absorbing coating used by the magnesium carbon bricks and their percentage are: paraffin 45%, glass powder 55%;

[0046] 2) When the brick, the graphitic carbon black ultrafine powder weighing will be added to the mixed phenolic resin and ethylene glycol, and then...

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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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