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Anti-erosion iron runner castable for large blast furnace

An iron ditch castable, anti-corrosion technology, applied in applications, household utensils, ceramic products, etc., can solve the problems of high trench strength, etc., to achieve enhanced corrosion resistance, high thermal conductivity, good permeability resistance and anti-stripping sexual effect

Inactive Publication Date: 2020-08-25
TANGSHAN GUOLIANG SPEICAL REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, before the maintenance of the main ditch off-line, the residual lining of the main ditch must be removed as a whole by a ditch machine. The strength of the ditch removal is high, and the huge mechanical force and vibration force of the high-power ditch machine will often crack and loosen the residual lining of the main ditch. Therefore, it is necessary to put forward higher requirements on the oxidation resistance and density of iron trench materials

Method used

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  • Anti-erosion iron runner castable for large blast furnace
  • Anti-erosion iron runner castable for large blast furnace
  • Anti-erosion iron runner castable for large blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Configure 1080m 3 The raw material ratio of the castable for blast furnace iron trough:

[0027] 15 parts of fused brown corundum with grain size of 1~3mm, 15 parts of fused brown corundum with grain size of 3~5mm, 15 parts of fused brown corundum with grain size of 5~8mm, 15 parts of fused brown corundum with grain size of 8~15mm;

[0028] 3 parts of white corundum with a particle size of 0~1mm, 2 parts of white corundum powder of 325 mesh;

[0029] 7 parts of silicon carbide with a particle size of 0~1mm; 6 parts of 200 mesh silicon carbide; 4 parts of 325 mesh silicon carbide; 2 parts of silicon carbide ultrafine powder with a particle size of <5μm;

[0030] 6 parts of activated alumina CL370 fine powder with particle size ≤2μm;

[0031] 2 parts of pure calcium aluminate cement powder with particle size <6μm;

[0032] 2.5 parts of 951 silicon powder with particle size ≤8μm;

[0033] 2 parts of spherical pitch with a particle size of 0.5~1mm;

[0034] Carbon black powder (N330) 1 ...

Embodiment 2

[0044] Preparation 1350m 3 The raw material ratio of the castable for blast furnace iron trough:

[0045] 14 parts of fused brown corundum with grain size of 1~3mm, 16 parts of fused brown corundum with grain size of 3~5mm, 16 parts of fused brown corundum with grain size of 5~8mm, 16 parts of fused brown corundum with grain size of 8~15mm;

[0046] 3 parts of white corundum with a particle size of 0~1mm;

[0047] 7 parts of silicon carbide with a particle size of 0~1mm; 5 parts of 200 mesh silicon carbide; 4 parts of 325 mesh silicon carbide; 3 parts of silicon carbide ultrafine powder;

[0048] 5 parts of activated alumina CL370 fine powder with particle size ≤ 2μm;

[0049] 3 parts of pure calcium aluminate cement powder with a particle size of <6µm;

[0050] 2.5 parts of 951 silicon powder with particle size ≤8μm;

[0051] 2 parts of spherical pitch with a particle size of 0.5~1mm;

[0052] Carbon black powder (N330) 1 part;

[0053] 1 part of antioxidant metal silicon powder 325 mesh; ...

Embodiment 3

[0062] 2500m 3 The raw material ratio of the castable for blast furnace iron trough:

[0063] 16 parts of fused brown corundum with grain size of 1~3mm, 16 parts of fused brown corundum with grain size of 3~5mm, 14 parts of fused brown corundum with grain size of 5~8mm, 16 parts of fused brown corundum with grain size of 8~15mm;

[0064] 5 parts of white corundum with a particle size of 0~1mm;

[0065] 5 parts of silicon carbide with a particle size of 0~1mm; 6 parts of 200 mesh silicon carbide; 6 parts of 325 mesh silicon carbide; 2 parts of silicon carbide ultrafine powder with a particle size of <5μm;

[0066] 6 parts of activated alumina CL370 fine powder with particle size ≤2μm;

[0067] 2 parts of pure calcium aluminate cement powder with particle size <6μm;

[0068] 2.5 parts of 951 silicon powder with particle size ≤8μm;

[0069] 2.5 parts of spherical pitch with a particle size of 0.5~1mm;

[0070] 0.5 parts of carbon black powder (N330) with particle size <0.6µm;

[0071] 0.5 part...

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Abstract

The invention relates to an anti-erosion iron runner castable for a large blast furnace. The material comprises, according to weight percentage, 58-64 parts of compact brown fused alumina particles, 2-5 parts of white corundum particles, 16-23 parts of silicon carbide, 5-7 parts of aluminum oxide micro-powder, 2-3 parts of pure calcium aluminate cement, 2-3 parts of silicon dioxide micro-powder, 1.5-2.5 parts of spherical asphalt particles, 0.5-1.2 parts of carbon black powder, 1.5-3.5 parts of metal silicon powder, 0.2-0.6 part of boron carbide, 0.1-0.2 part of metal aluminum powder, 0.15-0.2part of a water reducing agent, 0.6-1 part of an anti-erosion agent and 0.05-0.08 part of explosion-proof fibers. According to the castable, the service life of a primary runner of a main runner is prolonged, and the stability of safe operation of an iron runner is improved. It is verified that the requirements for rapid baking without cracking, erosion resistance, oxidation resistance, slag adhesion resistance and iron flux can be met, the iron flux can reach 180000 tons or above without repairing, and good application prospects are achieved.

Description

Technical field [0001] The invention belongs to the technical field of unshaped refractory materials, and specifically relates to a large blast furnace corrosion-resistant iron trough castable. Background technique [0002] In recent years, iron and steel enterprises have gradually pursued large-scale, including large ladle, large converter, and large blast furnace. While pursuing large furnace capacity for blast furnaces in the field of ironmaking, the smelting process has also been continuously strengthened. The iron trough of the blast furnace is an ironmaking process. The important part, the length of the maintenance cycle of the main iron trench is of great significance to the steel company. How to ensure the service life of iron ditch materials and prolong the regular repair period of the blast furnace under the premise of ensuring safe use is an important issue. The blast furnace tap channel is the channel through which high-temperature molten iron and slag flow out of th...

Claims

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Application Information

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IPC IPC(8): C04B35/103C04B38/02
CPCC04B35/103C04B38/02C04B2235/3208C04B2235/3222C04B2235/3418C04B2235/3821C04B2235/3826C04B2235/402C04B2235/424C04B2235/428C04B2235/48C04B2235/5212C04B2235/5284C04B2235/5427C04B2235/5436C04B2235/96C04B2235/9607C04B2235/9669C04B2235/9676C04B2235/9684
Inventor 李德民杨强王义龙杨松毕魏佳李彩霞张宏进
Owner TANGSHAN GUOLIANG SPEICAL REFRACTORY MATERIAL
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