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Carbon composite blast furnace iron runner castable

A iron channel castable and carbon composite technology, which is applied in the field of refractory materials, can solve the problems of short service life of iron channel castables, cracks in refractory castables, and low iron production, so as to increase iron production and prolong service life , Improve the effect of corrosion resistance

Inactive Publication Date: 2020-04-28
REWELL REFRACTORY ZHENGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, large blast furnaces (referring to 2000m 3 The iron trench castables used in the above blast furnaces are mainly made of Al 2 o 3 -SiC-C is the main component, among which C is a material with better resistance to slag erosion, but it is easy to oxidize
During the use of iron trough castables, due to the repeated temperature changes, the thermal stress generated will cause cracks or even peeling off of refractory castables, coupled with the oxidation of materials, resulting in a shorter service life of iron trough castables, and iron out The time is generally less than 100 days, and the amount of iron tapping is small (less than 180,000 tons)

Method used

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  • Carbon composite blast furnace iron runner castable
  • Carbon composite blast furnace iron runner castable
  • Carbon composite blast furnace iron runner castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 prepares 2000m 3 Blast furnace iron ditch castable

[0036] Its raw material ratio is:

[0037] 52 parts of fused brown corundum with particle size 1~8mm;

[0038] 8 parts of fused dense corundum with particle size 0~1mm, 5 parts of 325 mesh fused dense corundum;

[0039] 10 parts of silicon carbide with particle size 0~1mm; 9 parts of 200 mesh silicon carbide;

[0040] 2 parts of pure calcium aluminate cement fine powder;

[0041] 2.5 parts of silicon micropowder with a particle size of 1 μm;

[0042] 7 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm;

[0043] 2 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0044] 0.5 part of carbon black powder, 0.3 part of carbon resin powder;

[0045] 1.5 parts of metal silicon powder, 0.5 parts of boron carbide;

[0046] 0.05 parts of organic fibers with a melting temperature of 80~90°C can be used as Liaoyang Jintai JT-80 products;

[0047] Metal aluminum powder...

Embodiment 2

[0052] Embodiment 2 prepares 2500m 3 Blast furnace iron ditch castable

[0053] Its raw material ratio is:

[0054] 55 parts of fused brown corundum with particle size 1~8mm;

[0055] 5 parts of fused dense corundum with particle size 0~1mm, 3 parts of 325 mesh fused dense corundum;

[0056] 11 parts of silicon carbide with particle size 0~1mm; 11 parts of 200 mesh silicon carbide;

[0057] 1.5 parts of pure calcium aluminate cement fine powder;

[0058] 2 parts of silica powder with a particle size of 1 μm;

[0059] 6 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm; 3

[0060] 3 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0061] 0.3 parts of carbon black powder, 0.3 parts of carbon resin powder;

[0062] Antioxidant metal silicon powder 2 parts, boron carbide 0.3 part;

[0063] 0.05 parts of organic fibers with a melting temperature of 80-90°C;

[0064] Metal aluminum powder explosion-proof agent 0.12 parts;

[0065]...

Embodiment 3

[0069] Embodiment 3 preparation 3000m 3 Blast furnace iron ditch castable

[0070] Its raw material ratio is:

[0071] 54 parts of fused brown corundum with particle size 1~8mm;

[0072]7 parts of fused dense corundum with particle size 0~1mm, 3 parts of 325 mesh fused dense corundum;

[0073] 12 parts of silicon carbide with particle size 0~1mm; 8 parts of 200 mesh silicon carbide;

[0074] 1.5 parts of pure calcium aluminate cement fine powder;

[0075] 2.5 parts of silicon micropowder with a particle size of 1 μm;

[0076] 7 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm;

[0077] 2 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0078] 0.5 part of carbon black powder, 0.5 part of carbon resin powder;

[0079] 1.5 parts of antioxidant metal silicon powder, 0.5 parts of boron carbide;

[0080] 0.08 parts of organic fibers with a melting temperature of 80-90°C;

[0081] Metal aluminum powder explosion-proof agent 0.1 par...

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Abstract

The invention discloses a carbon composite blast furnace iron runner castable which is prepared from the following raw materials in parts by weight: fused brown fused alumina, fused compact corundum,silicon carbide, pure calcium aluminate cement, silica powder, bimodal activated alumina micro powder, spherical asphalt, carbon black powder, carbon resin powder, an antioxidant, organic fibers, an explosion-proof agent and a superplasticizer. During preparation, all the raw materials are uniformly mixed and put into a damp-proof and sun-proof jumbo bag to be stored. 5-6% of purified water is added during site construction, and then use is enabled after uniform stirring, construction finishing and conventional baking. According to the castable, different carbon-containing materials are added.the carbon content of the iron runner castable is increased, and erosion resistance of iron runners are greatly improved; meanwhile, scientific grain size distribution is adopted, the requirement forthe purity of raw materials is strict, it is guaranteed that the iron runner castable has very good high-temperature strength, volume stability, scouring resistance and oxidation resistance, the service lifetime of the iron runner is prolonged, the tapping amount is increased, and the economic benefits of blast furnace ironmaking are improved.

Description

technical field [0001] The invention relates to a refractory material, in particular to a carbon-composite blast furnace castable. Background technique [0002] The ironmaking blast furnace is one of the important equipment used in iron and steel smelting, and the blast furnace tapping trough is an important facility in front of the blast furnace, and its function is to realize the separation of liquid slag and iron. Because the tap trough stores high-temperature molten iron for a long time, its inner lining has been scoured and eroded by iron slag for a long time, and the working conditions are very harsh. [0003] With the increasing number of large-scale blast furnaces in my country, the requirements for refractory castables used in blast furnace tapping channels are becoming more and more stringent. At present, large blast furnaces (referring to 2000m 3 The iron trench castables used in the above blast furnaces are mainly made of Al 2 o 3 -SiC-C is the main component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3217C04B2235/3821C04B2235/3826C04B2235/402C04B2235/424C04B2235/428C04B2235/48C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/77C04B2235/96C04B2235/9615
Inventor 晁尚奎丁丰收李旭柯贺晓杰宋东峰
Owner REWELL REFRACTORY ZHENGZHOU CO LTD
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