Hot patching material for iron runner

Abstract

The invention discloses a hot patching material for an iron runner, which is prepared from alumina aggregate, SiC, SiO2 micropowder, alpha-Al2O3 micropowder, asphalt powder, zirconite micropowder, explosion-proof fiber, metallic silicon powder, soft clay and binder, wherein the binder is a mixture of aluminum sulfate and aluminum phosphate. In the invention, a ternary system Al2O3-ZrO2-SiO2 is introduced into the main iron runner casting material through the zirconium micropowder; and when the composition is fused and crystallized, crystals of mullite, corundum and baddeleyite simultaneously precipitate to form a staggered structure, thereby greatly improving the molten iron and iron slag corrosion resistance and enhancing the medium / high temperature strength of the hot patching material. The self-made aluminum sulfate / aluminum phosphate environmental-protection compound binder does not produce irritant cancerigenic gas in the product construction process.

Description

technical field [0001] The present invention relates to a refractory material. Background technique [0002] The hot-filling material for the iron ditch in the prior art uses bauxite, brown corundum and silicon carbide as main raw materials, and simultaneously uses phenolic resin as a binder. But there are following disadvantages: [0003] 1. After the resin is baked at high temperature, residual benzene, phenol and other harmful gases volatilize, and various harmful substances such as phenol and formaldehyde volatilize during use, which seriously affect the health of operators and on-site workers; [0004] 2. Low iron flow, frequent maintenance, increased labor intensity, and affect equipment operation efficiency; [0005] 3. During the use of the blast furnace hot filling material in the iron trench, it needs to withstand the alternating cold and heat, and at the same time, it is eroded and scoured by the slag and molten iron, which often causes cracks and peeling of the...

AI Technical Summary

Problems solved by technology

[0003] 1. After the resin is baked at high temperature, residual benzene, phenol and other harmful gases volatilize, and various harmful substances such as phenol and formaldehyde volatilize during use, which seriously affect the health of operators and on-site workers;

[0004] 2. Low iron flow, frequent maintenance, increased labor intensity, and affect equipment operation efficiency;

[0005] 3. During the use of the blast furnace hot filling material in the iron trench, it needs to withstand the alternating cold and heat, and at the same time, it is eroded and scoured by the slag and molten iron, which often causes cracks and peeling of the trench lining, which affects its service life.