Steel ladle repairing material and preparation and use methods thereof

Abstract

The invention discloses a steel ladle repairing material as well as preparation method and use methods thereof. The steel ladle repairing material is prepared from a base material and an additive. The base material comprises the following raw materials in percentage by weight: 43-58% of sintered corundum particles and fine powder, 12-24% of fused magnesia particles, 5-15% of calcium hexaluminate particles, 2-4% of magnesium oxide micro powder, 1-4% of silicon micro powder, 0-2% of aluminum oxide micro powder, 3-6% of pre-synthesized active corundum-spinel micro powder, 2-6% of soft clay fine powder, 0-3% of metal aluminum powder, 1-4% of calcium aluminate cement and 2-6% of alumina sol. According to the weight percentage of the base material, the additive comprises 0.02-0.15% of carbon fibers and 0.02-0.1% of a dispersing agent. The preparation method comprises the steps of dry material preparation and mixed sol slurry preparation. The use method comprises the following steps: uniformly mixing and stirring the dry material, the mixed sol slurry and the added purified water according to a designed ratio in a repair construction operation site for repair construction. By optimizing the raw material composition, the high-temperature and adhesion properties of the repairing material can be improved, and the service life of the ladle furnace lining under the condition of large scrap steel ratio can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of steelmaking and refractory materials, in particular to a ladle repair material and its preparation and use method. Background technique [0002] The ladle is one of the important equipment required for the steelmaking process. It is used to contain molten steel, and the molten steel can also be refined and other processes in the ladle. Improving the service life of ladles is conducive to improving the production efficiency of steel mills, reducing energy consumption, saving resources and reducing environmental pollution. Therefore, refractory materials for ladles are increasingly developing in the direction of longevity. However, during the use of the ladle, different parts of the ladle lining are in different working conditions, and local serious melting loss is inevitable. In order to avoid the replacement of the entire working lining due to partial damage to the ladle lining and prolong the service li...

AI Technical Summary

Problems solved by technology

[0003] Although there are domestic reports on aluminum-magnesium and magnesium-chromium ladle repair materials, in actual use, ladle repair materials generally have poor construction performance, and some have unstable adhesion performance, tend to decline overall, and have a high rebound rate; Parts are easy to fall off after baking; some repair materials have high water content, and the construction, maintenance and baking cycle is long

These are all detrimental to the use effect of the repair material and the ladle lining after the repair material, and also reduce the maintenance and operation efficiency of the ladle