Repair material for steel ladle and preparation method thereof

Abstract

The invention discloses a repair material for a steel ladle and a preparation method thereof, and relates to the repair material for the steel ladle. The repair material for the steel ladle is prepared from the following components in percentage by mass: 75 to 90 percent of corundum and/or alumina particles and fine powder, 0 to 5 percent of activated alumina micro-powder, 2 to 9 percent of magnesia, 1 to 4 percent of sepiolite and 0 to 5 percent of an additive; the preparation method of the repair material for the steel ladle comprises the following steps: weighing and bagging the corundum and/or alumina fine powder, the activated alumina micro-powder, fine magnesia powder, the sepiolite, silicon micro-powder and the additive according to the requirement of a formula; checking the weight,and adding the components into a material mixing machine; after the materials are mixed, fixing single weight, and bagging the materials for later use; adding a fine powder homogenizing material andfibrous sepiolite into a mixing machine according to the requirement of the formula; adding magnesia and corundum particles less than or equal to 1 mm, stirring, and then adding the corundum or alumina particles of 3 to 1 mm and 5 to 3 mm, stirring and discharging a material, and sealing and packaging a finished product by using plastics. The repair material can be directly used without adding water and stirring, has high construction performance, and is used for repairing refractory materials, such as a steel ladle breathable pocket brick, a nozzle pocket brick and a steel ladle brick, in a thermal state.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a repair material for a ladle and a preparation method thereof. Background technique [0002] As we all know, the ladle plays a major role in the refining outside the furnace during the molten steel smelting process. With the continuous improvement of the quality and performance of steel, the working conditions of the ladle are becoming more and more harsh. When the ladle is used in the middle and late stages, it is necessary to use Refractory materials are repaired to ensure the safe use of the ladle. [0003] Traditional repairing materials need to be mixed with water. In the process of on-site construction, it is difficult to accurately control the amount of water added to the repairing materials. Field workers generally add water based on experience, and it is easy to add too much or too little water, which will affect the repairing materials. The effect of use;...

AI Technical Summary

Problems solved by technology

[0003] Traditional repairing materials need to be mixed with water. In the process of on-site construction, it is difficult to accurately control the amount of water added to the repairing materials. Field workers generally add water based on experience, and it is easy to add too much or too little water, which will affect the repairing materials. The effect of use; the on-site repair material needs to be fully stirred after adding water, and the site needs to have a mixer, which requires a large investment. If the site is manually mixed, it is difficult to mix evenly; when the repair material is added, the ladle is in a "red hot" state. After adding water and stirring, the wet repairing material is added to the repaired part of the ladle, so that the refractory material in the ladle is in a state of rapid cooling, which is likely to cause cracks in the refractory material and increase the danger of using the ladle