Coating paint for magnesia carbon bricks

Abstract

The invention discloses a coating paint for magnesia carbon bricks, which belongs to the technical field of materials and comprises the following components: carbon black, paper fiber, polyethylene glycol, pentaerythritol, triethylamine, maleic anhydride and water. The coating paint disclosed by the invention can prevent the magnesia carbon brick from being oxidized at high temperature, and can absorb expansion of the magnesia carbon brick when a converter is started, so that the strength of the magnesia carbon brick is enhanced, and the service life of the magnesia carbon brick is prolonged;the coating paint also has the advantages of being low in cost, simple in preparation method and convenient to use.

Description

technical field

[0001] The invention relates to coatings, in particular to coating coatings for magnesia-carbon bricks, and belongs to the technical field of materials. Background technique

[0002] my country is a big country of steel production, and the converter is one of the most critical main equipments of my country's steelmaking enterprises. Modern steelmaking converters generally use magnesia carbon bricks as the lining working layer. Magnesia-carbon bricks are refractory materials made of magnesium oxide and carbon materials as the main raw materials, and added with carbon binders such as phenolic resin and pitch. After the converter is turned on, its working environment temperature will reach 1650-1700°C, and the magnesia-carbon brick will undergo a one-time non-retractable expansion. The expansion may cause the adjacent magnesia-carbon brick to be squeezed and the magnesia-carbon brick will be crushed. At the same time, under high temperature conditions, the car...

Examples

preparation example Construction

[0027] The preparation method of the above-mentioned coating paint is to add each component into a heating container according to a predetermined ratio, then heat at 150-180°C for 3-5 hours, stir evenly at a stirring speed of 50-100 rpm during heating, and finally cool to room temperature That's it.

[0028] The method of using the above-mentioned coating paint is to evenly spray or brush the prepared coating paint on the surface of the magnesia-carbon brick and then dry it naturally, then heat it at 150°C for 2 hours, and finally cool it to room temperature. Preferably, the thickness of the coating on the surface of the magnesia carbon brick is 0.2-0.25mm.

Embodiment 1

[0030] A coating coating for magnesia carbon bricks, the components of the coating coating include carbon black, paper fiber, polyethylene glycol, pentaerythritol, triethylamine, maleic anhydride and water, wherein each of the coating coating The components are 6% by weight of carbon black, 7% of paper fiber, 1% of polyethylene glycol, 3% of pentaerythritol, 3% of triethylamine, 4% of maleic anhydride, and the balance is water.

[0031] The particle size of the carbon black is 35-50 μm, and the fiber length of the paper fiber is 0.5-2 mm;

[0032] The preparation method of the above-mentioned coating paint is to add each component into a heating container according to a predetermined ratio, then heat at 150°C for 5 hours, stir evenly at a stirring speed of 50 rpm during heating, and finally cool to room temperature.

[0033] The method of using the above-mentioned coating paint is to spray or brush the prepared coating paint evenly on the surface of the magnesia-carbon brick a...

technical field

[0001] The invention relates to coatings, in particular to coating coatings for magnesia-carbon bricks, and belongs to the technical field of materials. Background technique

[0002] my country is a big country of steel production, and the converter is one of the most critical main equipments of my country's steelmaking enterprises. Modern steelmaking converters generally use magnesia carbon bricks as the lining working layer. Magnesia-carbon bricks are refractory materials made of magnesium oxide and carbon materials as the main raw materials, and added with carbon binders such as phenolic resin and pitch. After the converter is turned on, its working environment temperature will reach 1650-1700°C, and the magnesia-carbon brick will undergo a one-time non-retractable expansion. The expansion may cause the adjacent magnesia-carbon brick to be squeezed and the magnesia-carbon brick will be crushed. At the same time, under high temperature conditions, the car...

Examples

preparation example Construction

[0027] The preparation method of the above-mentioned coating paint is to add each component into a heating container according to a predetermined ratio, then heat at 150-180°C for 3-5 hours, stir evenly at a stirring speed of 50-100 rpm during heating, and finally cool to room temperature That's it.

[0028] The method of using the above-mentioned coating paint is to evenly spray or brush the prepared coating paint on the surface of the magnesia-carbon brick and then dry it naturally, then heat it at 150°C for 2 hours, and finally cool it to room temperature. Preferably, the thickness of the coating on the surface of the magnesia carbon brick is 0.2-0.25mm.

Embodiment 1

[0030] A coating coating for magnesia carbon bricks, the components of the coating coating include carbon black, paper fiber, polyethylene glycol, pentaerythritol, triethylamine, maleic anhydride and water, wherein each of the coating coating The components are 6% by weight of carbon black, 7% of paper fiber, 1% of polyethylene glycol, 3% of pentaerythritol, 3% of triethylamine, 4% of maleic anhydride, and the balance is water.

[0031] The particle size of the carbon black is 35-50 μm, and the fiber length of the paper fiber is 0.5-2 mm;

[0032] The preparation method of the above-mentioned coating paint is to add each component into a heating container according to a predetermined ratio, then heat at 150°C for 5 hours, stir evenly at a stirring speed of 50 rpm during heating, and finally cool to room temperature.

[0033] The method of using the above-mentioned coating paint is to spray or brush the prepared coating paint evenly on the surface of the magnesia-carbon brick a...

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