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

A nano-sol and wear-resistant plate technology, which is applied in the field of refractory materials for blast furnace ironmaking, can solve the problems of poor slag iron erosion and wear resistance, reduced service life of the main iron trench, and affecting normal production of blast furnaces, etc., to achieve good oxidation resistance , Improve the erosion resistance and strengthen the combination effect

Active Publication Date: 2019-06-07
CHINA JINGYE ENG TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 5

[0049] In Example 1-Example 5, each component of the non-oxidized composite powder was weighed in parts by weight shown in Table 2, poured into an inclined mixer and mixed, the rotor speed was controlled at 150-180r / min, and the mixing time Control it for 3 to 5 minutes, and put it into a waterproof packaging bag after mixing and seal it for storage.

[0050] The composition of the non-oxide composite powder of table 2 embodiment 1-embodiment 5

[0051] name

[0052] 3. Nano-sol combined with long-life environmental protection wear-resistant plate prepared by non-oxidizing composite powder

preparation example 1

[0054] Its components and parts by weight are: 35 parts of magnesium-aluminum spinel corundum; 25 parts of fused dense corundum; 25 parts of SiC; 8 parts of non-oxide composite powder prepared in Example 1 above; 5 parts of activated alumina micropowder , 2 parts of metal silicon powder, 6 parts of nano aluminum sol, 0.05 part of wetting agent, 0.2 part of explosion-proof fiber,

[0055] Among them, the gradation of magnesium-aluminum spinel corundum is 8mm-5mm 10 parts; 5mm-3mm 15 parts, 3mm-1mm 10 parts.

[0056] Among them, the gradation of fused dense corundum is 1mm-0.2mm, 15 parts; the particle size is ≤0.074mm, and 10 parts.

[0057] Weigh each component of the wear-resistant plate raw material according to its weight, pour it into the mixer and stir for 5 minutes, adjust the amount of nano-alumina sol to make the vibration fluidity reach 130-140mm, and then pour it into the corresponding wear-resistant plate mold. Use a vibrating rod to tamp the air holes, release the...

preparation example 2

[0059] Its components and parts by weight are: 35 parts of magnesium-aluminum spinel corundum; 24 parts of fused dense corundum; 25 parts of SiC; 11 parts of non-oxide composite powder prepared in Example 2 above; 3 parts of activated alumina micropowder , 2 parts of metal silicon powder, 7 parts of nano aluminum sol, 0.06 parts of wetting agent, 0.2 parts of explosion-proof fiber,

[0060] Among them, the gradation of magnesium-aluminum spinel corundum is 8mm-5mm 10 parts; 5mm-3mm 15 parts, 3mm-1mm 10 parts.

[0061] Among them, the gradation of fused dense corundum is 1mm-0.2mm, 10 parts; the particle size is ≤0.074mm, and 14 parts.

[0062] Weigh each component of the wear-resistant plate raw material according to its weight, pour it into the mixer and stir for 5 minutes, adjust the amount of nano-alumina sol to make the vibration fluidity reach 130-140mm, and then pour it into the corresponding wear-resistant plate mold. Use a vibrating rod to tamp the air holes, release ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103C04B35/63C04B35/80
Inventor 张君博唐勋海徐自伟高栋邱海龙张雯文郑期波徐焱慧郑江
Owner CHINA JINGYE ENG TECH CO LTD
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