Torpedo tank lining gunning repairing material, preparation method and applications thereof

Abstract

The invention discloses a torpedo tank lining gunning repairing material, a preparation method and applications thereof, wherein the torpedo tank lining gunning repairing material comprises, by weight, 60-67 parts of a Al2O3-containing fireproof material after-using regenerating material, 3-7 parts of fireproof clay, 2-5 parts of flaky graphite, 3-7 parts of silicon carbide, 10-15 parts of an alumina homogeneous material, 3-6 parts of kyanite, 2-5 parts of alpha-Al2O3 micro-powder, 3-11 parts of a binder, and 1.2-3.4 parts of an admixture. According to the present invention, the torpedo tank lining gunning repairing material has characteristics of low raw material cost, wide regeneration material source, convenient cold-hot state gunning repairing, excellent thermal shock stability, strong repairing layer interface bonding strength, strong slag iron corrosion resistance, high torpedo tank operation rate, long service life, and the like.

Description

technical field [0001] The invention relates to a refractory material lining gunning repair material, in particular to a torpedo tank lining gunning repair material and its preparation method and application, belonging to the technical field of torpedo tank refractory materials for transporting molten iron. Background technique [0002] The torpedo tank has become one of the main thermal equipment for the transportation of molten iron between the iron-making blast furnace and the steel-making converter in domestic and foreign iron and steel enterprises due to its advantages of large molten iron loading capacity, high transportation efficiency, good thermal insulation performance, lower temperature of molten iron, and long service life. , the middle section is cylindrical, and the two ends are conical truncated cones. The shape is similar to a torpedo, so it is called a torpedo tank. Due to the irregular shape of the torpedo tank, the refractory lining of the torpedo tank is ...

AI Technical Summary

Problems solved by technology

According to the above-mentioned patent report, it can be seen that the patent reduces the cost of repair materials through the selection of low-grade raw materials and the recycling of refractory materials after use, but they are all sprayed with water-based paint after adding water, which is not convenient for the guarantee of the thickness of the sprayed coating. At the same time, Calcium aluminate cement is used as the main binder, which is not conducive to the preservation of the coating after mixing with water and the guarantee of construction time; in addition, the critical particle size of the gunning material reaches 5mm, and the amount of water added is ≤ 10%, which makes it difficult to form a uniform water quality with excellent fluidity Coating, it is difficult to achieve spraying construction by spraying machine

[0005] Based on the above, it can be seen that iron and steel enterprises at home and abroad have adopted torpedo tank lining repair and maintenance methods to improve the service life of torpedo tanks. The material system of the repair material and the working lining Al 2 o 3 -SiC-C refractory bricks are similar, and the repair method is semi-dry gunning or hand-applied cold construction, and has achieved the purpose of prolonging the service life of the torpedo tank and reducing the consumption of refractory materials in actual production; but the common repair materials are expensive , low thermal construction bonding strength, and thermal shock stability need to be further improved; although there are some patent reports on low-cost repair materials, it is very difficult to implement