Coating for steel ladle magnesia carbon brick and application method thereof

Abstract

The present invention discloses a coating for a steel ladle magnesia carbon brick. The coating comprises the following raw materials in weight percentage: 20-30% of clay chamotte powder, 10-15% of clay raw material powder, 8-15% of boron glass powder, 5% of silica powder, 5% of silicon carbide fine powder, 5% of solid sodium silicate, 15-25% of Guangxi white clay, 25-30% of sodium feldspar powder, and 2% of yellow dextrin. The sum of the weight percentages of all the above raw materials is 100%. According to the invention, when the coating is baked, the coating is gradually melted into the glass state along with the temperature increasing process. In this way, the coating is adhered to the surface of the magnesia carbon brick. Therefore, the magnesia carbon brick is isolated from the air and is prevented from being in contact with the air by the coating. As a result, the oxidation possibility of the magnesia carbon brick is reduced.

Description

technical field [0001] The invention relates to a coating for ladle magnesia-carbon bricks and a using method thereof. Background technique [0002] As the requirements for steel quality are getting higher and higher, the requirements for ladle smelting are becoming more and more stringent, and the requirements for magnesia-carbon bricks used in ladles are also getting higher and higher. At present, during the baking and use of ladle magnesia-carbon bricks, due to A 10-30mm decarburized oxide layer is generally formed on the surface of the magnesia carbon brick, which will greatly shorten the service life of the ladle and reduce the quality of the steel. Contents of the invention [0003] In view of the above problems, the present invention provides a coating for ladle magnesia-carbon bricks, which is coated on the surface material of magnesia-carbon bricks to block the contact between external oxygen and carbon in magnesia-carbon bricks, so as to reduce the oxide layer an...

AI Technical Summary

Problems solved by technology

[0002] As the requirements for steel quality are getting higher and higher, the requirements for ladle smelting are becoming more and more stringent, and the requirements for magnesia-carbon bricks used in ladles are also getting higher and higher. At present, during the baking and use of ladle magnesia-carbon bricks, due to the A layer of 10-30mm decarburized oxide layer is generally formed on the surface of magnesia carbon bricks, which will greatly shorten the service life of the ladle and reduce the quality of the steel