Quick-drying self-flow iron runner castable material and application method thereof

Abstract

The invention relates to a quick-drying self-flow iron runner castable material which comprises the following chemical components in percentage by weight: 60-80% of brown alumina particles, 5-15% of brown alumina powder, 5-15% of silicon carbide particulate material, 3-13% of silicon carbide fine powder, 0-4% of spherical asphalt, 0-6% of silicon oxide micro powder, 1-7% of aluminum oxide micro powder, 0-6% of pure calcium aluminate cement, 0-1% of aluminium metal powder, 0-2% of silica powder, 0-0.5% of special fiber and 0-0.5% of water reducing agent, and the invention also relates to an application method thereof which comprises the steps of cooling, residue clearing, template raising, pouring and baking. The material of the invention integrates the advantages of castable materials and gunning materials into a whole, not only has the characteristic of long service life of the castable materials but also has the characteristics of convenient construction and rapid baking of the gunning materials; and a blast-furnace iron tap runner utilizes the quick-drying self-flow iron runner castable material to replace the iron runner ramming material or the iron runner castable material, and the service life of the blast-furnace iron tap runner is increased by 20%.

Description

technical field [0001] The invention relates to a refractory material and a using method thereof, in particular to a quick-drying self-flowing iron trough castable for a steelmaking blast furnace and a using method thereof. Background technique [0002] The iron trough is the channel for the steelmaking blast furnace to draw high-temperature molten iron and slag. In the process of use, the lining of the iron trench is subjected to the severe erosion of flowing high-temperature molten iron and slag, the chemical erosion of blast furnace slag, the infiltration of molten iron, and the sudden temperature change of intermittent iron and slag discharge. thermal shock effects, etc. Therefore, it is generally required that the iron ditch lining material has better erosion resistance of high temperature melt, excellent high temperature wear resistance, high temperature slag erosion resistance, good thermal shock stability, small reburning volume change, and strong oxidation resistan...

AI Technical Summary

Problems solved by technology

In order to achieve the synchronization of the service life of each part, it is often necessary to repair the impact area of ​​the iron trough when the blast furnace is shut down during the use of the iron trough, but the above-mentioned refractory materials have disadvantages as repair materials for the iron trough: A1 2 o 3 - The explosion-proof agent in the SiC-C castable mixture is unreasonable, the anti-explosion cracking performance of this product is poor, and it cannot be baked quickly, otherwise, the product will crack during the baking process, A1 2 o 3 -SiC-C ramming material is inconvenient to construct, wastes a lot of materials, and the performance and service life of the construction body are not as good as castable materials: A1 2 o 3 -SiC-C gunning material is convenient for construction, but the various performances and service life of the construction body are worse