Nano-sol bonded wear-resistant plate for main iron channel of blast furnace and its preparation method and application

Abstract

The invention discloses a nano-sol bonded wear-resistant plate for a main iron channel of a blast furnace. The raw materials of the wear-resistant plate include, by weight, 30-45 parts of magnesium-aluminum spinel corundum, 20-30 parts of fused dense corundum, 20-30 parts of SiC, 6-16 parts of non-oxide composite powder, active 2-6 parts of alumina micropowder, 1-4 parts of metal silicon powder, 4-8 parts of nano-alumina sol, 0.05-0.1 part of wetting agent, 0.1-0.5 part of explosion-proof fiber, wherein the non-oxide composite powder, according to In parts by weight, the composition is as follows: 1-3 parts of carbon black, 2-4 parts of silicon nitride, 1-5 parts of titanium carbonitride, and 2-4 parts of aluminum titanate. The invention also discloses a preparation method and application of the wear-resistant plate. The invention can improve the erosion resistance and wear resistance and corrosion resistance of the lining material of the main iron trough, improve the working environment of workers, shorten the construction time of main iron trough repair and prolong the service life of the main iron trough.

Description

technical field [0001] The invention relates to the technical field of refractory materials for blast furnace ironmaking, in particular to a long-life and environment-friendly nano-sol bonded wear-resistant plate for the main iron channel of a blast furnace, a preparation method and application thereof. Background technique [0002] With the development of blast furnaces in the direction of large scale, high efficiency, automation and longevity, blast furnaces at home and abroad gradually adopt fine materials, high wind temperature, ultra-high pressure furnace roof, increase oxygen enrichment, hydrocarbon and pulverized coal fuel injection and electronic computer control, etc. The new technology has greatly improved the production capacity of the blast furnace. However, this has led to an increase in the temperature of molten iron, an increase in the amount of slag and iron to be processed, and an acceleration of the tapping rate, which has accelerated the erosion rate of th...

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Problems solved by technology

[0004] The technical defects of the refractory materials used in the main iron trough in the prior art are as follows: (1) The lining material in the area where the main iron trough falls has poor resistance to slag iron erosion and wear resistance, which leads to a reduction in the service life of the entire main iron trough

(2) In the prior art, the refractory materials for the main iron trench mostly use aluminate cement as the binder, and the Ca in the cement 2+ The ions will react with the slag to form a low-melting point substance - calcite feldspar, which will gradually erode and destroy the material structure

(3) In the prior art, high-temperature asphalt is mostly used as the carbon source to resist the infiltration of slag and iron and improve the corrosion resistance of slag and iron. However, the asphalt volatilizes toxic substances containing benzopyrene during use, causing environmental pollution

(4) When repairing the main iron trench, the construction time is long, generally more than 15 hours, which affects the normal production of the blast furnace and cannot meet the requirements of the development of ironmaking technology for the refractory material for the main iron trench

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