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Iron runner castable for large- and medium-sized blast furnaces

An iron trench castable, large and medium-sized technology, applied in the field of refractory materials, can solve the problems of cracks in refractory castables, short service life, less iron output, etc., and achieves extended service life, increased iron output, and good high temperature strength. Effect

Inactive Publication Date: 2019-06-04
REWELL REFRACTORY ZHENGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of iron trough castables, due to repeated temperature changes, the thermal stress generated will cause cracks or even peeling off of refractory castables, that is, the service life of iron trough castables is short, and the tapping time is generally less than 90 days , a small amount of iron (less than 150,000 tons)

Method used

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  • Iron runner castable for large- and medium-sized blast furnaces
  • Iron runner castable for large- and medium-sized blast furnaces
  • Iron runner castable for large- and medium-sized blast furnaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 prepares 1080m 3 Blast furnace iron ditch castable

[0030] Its raw material ratio is:

[0031] 52 parts of fused brown corundum with particle size 1~8mm;

[0032] 8 parts of fused dense corundum with particle size 0~1mm, 5 parts of 325 mesh fused dense corundum;

[0033] 10 parts of silicon carbide with particle size 0~1mm; 9 parts of 200 mesh silicon carbide;

[0034] 2.5 parts of pure calcium aluminate cement micropowder;

[0035] 3 parts of silica powder with a particle size of 1 μm;

[0036] 5 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm;

[0037] 2 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0038] Carbon black powder (imported CarobresP powder) 1 part;

[0039] Antioxidant metal silicon powder 2 parts, boron carbide 0.5 part;

[0040] 0.05 part of low melting point organic fiber;

[0041] Metal aluminum powder explosion-proof agent 0.12 parts;

[0042] German BASF FS10 superplasticizer 0....

Embodiment 2

[0046] Embodiment 2 prepares 1750m 3 Blast furnace iron ditch castable

[0047] Its raw material ratio is:

[0048] 55 parts of fused brown corundum with particle size 1~8mm;

[0049] 5 parts of fused dense corundum with particle size 0~1mm, 3 parts of 325 mesh fused dense corundum;

[0050] 12 parts of silicon carbide with particle size 0~1mm; 12 parts of 200 mesh silicon carbide;

[0051] 2 parts of pure calcium aluminate cement micropowder;

[0052] 2 parts of silica powder with a particle size of 1 μm;

[0053] 6 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm;

[0054] 2.5 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0055] Carbon black powder (imported CarobresP powder) 1 part;

[0056] Antioxidant metal silicon powder 2 parts, boron carbide 0.5 part;

[0057] 0.05 part of low melting point organic fiber;

[0058] Metal aluminum powder explosion-proof agent 0.12 parts;

[0059] German BASF FS10 superplasticizer 0...

Embodiment 3

[0063] Example 3 Preparation of 1080m 3 Blast furnace iron ditch castable

[0064] Its raw material ratio is:

[0065] 55 parts of fused brown corundum with particle size 1~8mm;

[0066] 7 parts of fused dense corundum with particle size 0~1mm, 3 parts of 325 mesh fused dense corundum;

[0067] 12 parts of silicon carbide with particle size 0~1mm; 8 parts of 200 mesh silicon carbide;

[0068] 2 parts of pure calcium aluminate cement micropowder;

[0069] Silica powder 2 with a particle size of 1 μm;

[0070] 7 parts of bimodal activated alumina micropowder with a particle size of 3-5 μm;

[0071] 2 parts of spherical asphalt with a particle size of 0.2~0.5mm;

[0072] Carbon black powder (imported CarobresP powder) 1 part;

[0073] 1.5 parts of antioxidant metal silicon powder, 0.5 parts of boron carbide;

[0074] 0.08 part of low melting point organic fiber;

[0075] Metal aluminum powder explosion-proof agent 0.1 part;

[0076]German BASF FS10 superplasticizer 0.04...

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Abstract

The invention discloses an iron runner castable for large- and medium-sized blast furnaces. The iron runner castable is prepared from the following raw materials in parts by weight: fused brown fusedalumina, fused compact corundum, silicon carbide, pure calcium aluminate cement, silicon micropowder, double-peak activated aluminum oxide micropowder, spherical asphalt, carbon black powder, an antioxidant, organic fibers, an explosion-proof agent, and a high-efficiency water reducing agent. When in use, the raw materials are accurately weighed and uniformly mixed, and then the mixture is put into a moisture-proof and sun-proof ton bag to be stored. During on-site construction, 3.5-4% of purified water is added to uniformly stir the materials then construction is completed, and the castable can be used after being conventionally baked. Scientific particle size gradation is adopted for the main body granular materials, and the purity of the used raw materials is strictly required, so thatthe iron runner castable has very good high-temperature strength, volume stability, erosion resistance, scouring resistance and oxidation resistance. The product prolongs the service life of the ironrunner, increases the iron output, and improves the economic benefits of blast furnace iron making.

Description

technical field [0001] The invention relates to a refractory material, in particular to a castable material for a large and medium-sized blast furnace iron trough. Background technique [0002] Ironmaking blast furnace is one of the important equipment used in iron and steel smelting. With the increasing number of large and medium-sized 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 and medium-sized blast furnaces (referring to 1080 m 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, and SiC and C are substances that are easily oxidized. During the use of iron trough castables, due to repeated temperature changes, the thermal stress generated will cause cracks or even peeling off of refractory castables, that is, the service life of iron trough castables is short, and the tapping time i...

Claims

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Application Information

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IPC IPC(8): C04B35/103
Inventor 丁丰收晁尚奎李理想李旭柯校小帅校闯许人杰
Owner REWELL REFRACTORY ZHENGZHOU CO LTD
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