A high-aluminum self-flowing iron trough castable

Abstract

The invention discloses a high-alumina self-flowing iron trough castable, which comprises the following components and the ratio of each component is: brown corundum or dense corundum: 40-50 parts, andalusite: 10-20 parts, silicon carbide: 10-20 parts 15 parts, composite micropowder: 10-20 parts, carbon material: 3-5 parts, binder 10-15 parts, composite water reducer: 2-4 parts. The present invention adds andalusite to replace part of brown corundum, andalusite decomposes and transforms into mullite with high melting point, low expansion coefficient, high temperature mechanical properties and thermal shock resistance during use, so that the product can resist thermal shock It has a good application effect in the iron trough that requires high performance and high temperature strength; when the introduction of composite micropowder in the product, the addition of α-Al2O3 micropowder and SiO2 micropowder is 4%, and the addition of composite water reducer, its The fluidity is the best. At this time, the system generates a large number of primary mullite phases at high temperatures, and the acicular mullite phases are interspersed between the corundum skeletons, so that the room temperature flexural strength and thermal shock resistance of the material are optimal.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to the technical field of a high-aluminum self-flowing iron trough castable. Background technique [0002] The tapping trough of blast furnace is a passage for guiding high temperature molten iron and slag and fully separating them. The service life of the refractories used in it directly affects the normal production of blast furnace. At present, the tap channel has loose structure, anti-oxidation slag, and low iron flow rate. The tap channel is repaired for a minor repair in three days and a major repair for five days. The number of repeated trench repairs is high, the labor intensity of the workers is high, and the service time of the tap channel is short. It often affects the punctual tapping of the blast furnace, which brings inconvenience to the blast furnace production. With the continuous improvement of blast furnace intensified smelting and blast furnace operation t...

AI Technical Summary

Problems solved by technology

It often affects the punctual tapping of the blast furnace, which brings inconvenience to the blast furnace production