Nano-sol combined wear-resistant board used for main iron channel of blast furnace and production method and application thereof

Abstract

The invention discloses a nano-sol combined wear-resistant board used for a main iron channel of a blast furnace. Raw materials of the wear-resistant board comprise, in parts by weight, 30-45 parts ofmagnesium-containing aluminium-containing spinel alumina, 20-30 parts of electro-fused dense alumina, 20-30 parts of SiC, 6-16 parts of nonoxide compound powder, 2-6 parts of activated aluminium oxide micro powder, 1-4 parts of silicon metal powder, 4-8 parts of nano-aluminum sol, 0.05-0.1 part of wetting agent and 0.1-0.5 part of explosion-proof fibers, wherein the nonoxide compound powder is composed of, in parts by weight, 1-3 parts of carbon black, 2-4 parts of silicon nitride, 1-5 parts of titanium carbonitride and 2-4 parts of aluminium titanate. The invention further discloses a production method and application of the wear-resistant board. By means of the nano-sol combined wear-resistant board used for the main iron channel of the blast furnace and the production method and the application thereof, the erosion resistance, the wear resistance and the corrosion resistance of a lining material of the main iron channel can be improved, a work environment of workers can be improved, remedial work time of the main iron channel can be shortened, and the service life of the main iron channel can be prolonged.

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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