Coating for repairing molded windshield ring for casting furnace

Abstract

The invention discloses a coating for repairing a molded windshield ring for a casting furnace, which comprises the following components in part by weight: 20 to 30 parts of fire clay, 70 to 80 parts of No.4 quartz sand and the balance of water. The coating also comprises coal tar which accounts for 2 to 5 percent of the mass of the coating. The fire clay comprises the following components in part by weight: 50 to 70 parts of refractory clay, 20 to 40 parts of high alumina powder and 5 to 15 parts of magnesia powder, wherein chromium ore powder is mixed in the No.4 quartz sand and accounts for 5 percent of the total mass of the No.4 quartz sand. The coating has the advantages of better repairing effect, wider application range, lower production cost, stronger toughness and convenience forrepairing a net structure.

Description

technical field [0001] The invention relates to a coating, in particular to a coating for repairing a molded windshield ring for a casting furnace, and is particularly suitable for repairing a molded windshield ring for a casting furnace. Background technique [0002] Casting furnaces are generally used for continuous casting of castings. Because of their strong heating capacity, intermittent operation, low assembly cost, and good sealing effect, they not only have good casting quality, but also have high casting efficiency, so they have been widely used. However, since the casting furnace is in a high-temperature environment for a long time and is often in contact with the casting melt, cracks often occur in some parts of the casting furnace. At this time, if the casting furnace is replaced as a whole, not only the cost is large, but also the operation is cumbersome and wastes time. , therefore, it is a good choice to repair the ruptured part. [0003] The Chinese patent p...

AI Technical Summary

Problems solved by technology

Although the materials involved in this invention have high refractoriness and good insulation performance, and can also be partially repaired, because they can only be used for repairing themselves, they cannot be used for repairing casting furnaces made of other materials. The application range is narrow, and its components are more expensive, and the production cost is higher. In addition, the mechanical strength and toughness of the repair material are poor, and the toughness is weak, so it is not suitable for the repair of the mesh structure.