A regenerated silicon carbide al 2 o 3 -sic-c iron ditch castable and preparation method thereof

Abstract

The invention discloses a regenerated silicon carbide Al 2 o 3 ‑SiC‑C iron trough castable and preparation method thereof. The castable is made of corundum, regenerated silicon carbide, active Al 2 o 3 It is prepared by mixing micropowder, silica micropowder, carbon black, antioxidant, pure calcium aluminate cement, asphalt, and admixtures. The castable is made of recycled silicon carbide as raw material, and under the condition of interaction with other raw materials, the iron channel castable with performance that fully meets the requirements of use is prepared. The recovery and reuse of silicon carbide in this process greatly reduces the production cost. cost, significantly reduces the consumption of resources and energy, and avoids the impact of waste on the environment, has high social and economic benefits, and has a good application prospect.

Description

technical field

[0001] The invention belongs to the technical field of refractory materials, in particular to a regenerated silicon carbide Al 2 o 3 -SiC-C castable for iron trough and preparation method thereof. Background technique

[0002] al 2 o 3 -SiC-C castables are widely used in blast furnace ironmaking systems, including furnace hearth, main ditch, slag ditch, iron ditch, swing chute, torpedo tank and other parts. The use of this material can greatly Improve the performance and service life of the blast furnace ironmaking system. al 2 o 3 The use of -SiC-C castable castables can greatly increase the service life of the iron trough. With Al 2 o 3 -Universal use of SiC-C refractories in large blast furnaces, Al 2 o 3 -The consumption of SiC-C iron channel castables has increased significantly, and at the same time, the consumption and use of raw materials such as SiC have rapidly increased.

[0003] Because SiC has excellent mechanical properties, wear res...

Examples

Embodiment 1

[0030] A kind of regenerated silicon carbide Al 2 o 3 -SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 62%, regenerated silicon carbide is 20%, active Al 2 o 3 Micropowder is 6%, silicon micropowder is 3%, carbon black is 2%, antioxidant is 2.5%, pure calcium aluminate cement is 3%, asphalt is 1.5%;

[0031] Add explosion-proof fibers accounting for 0.05% of the total amount of the above raw materials, water reducing agents accounting for 0.06% of the total amount of the above raw materials, and dispersants accounting for 0.08% of the total amount of the above raw materials;

[0032] Among the above raw materials:

[0033] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 15% for 3-1mm, 35% for 1-0mm, and 50% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

...

Embodiment 2

[0043] A kind of regenerated silicon carbide Al 2 o 3 -SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 60%, regenerated silicon carbide is 20%, active Al 2 o 3 Micropowder is 5%, silicon micropowder is 3%, carbon black is 3%, antioxidant is 2.5%, pure calcium aluminate cement is 4%, asphalt is 2.5%;

[0044] Add explosion-proof fiber accounting for 0.08% of the total amount of raw materials, water reducing agent accounting for 0.08% of the total amount of raw materials and dispersant accounting for 0.08% of the total amount of raw materials.

[0045] Among the above raw materials:

[0046] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 15% for 3-1mm, 35% for 1-0mm, and 50% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

[0047] The content of C in the car...

Embodiment 3

[0056] A kind of regenerated silicon carbide Al 2 o 3 - SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 60%, regenerated silicon carbide is 24%, active Al 2 o 3 Micropowder is 4%, silicon micropowder is 2%, carbon black is 3%, antioxidant is 2%, pure calcium aluminate cement is 3%, asphalt is 2%;

[0057] Add explosion-proof fiber accounting for 0.08% of the total amount of raw materials, water reducer accounting for 0.08% of the total amount of raw materials and dispersant accounting for 0.10% of the total amount of raw materials.

[0058] Among the above raw materials:

[0059] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 20% for 3-1mm, 40% for 1-0mm, and 40% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

[0060] The content of C in the carbon black ...

technical field

[0001] The invention belongs to the technical field of refractory materials, in particular to a regenerated silicon carbide Al 2 o 3 -SiC-C castable for iron trough and preparation method thereof. Background technique

[0002] al 2 o 3 -SiC-C castables are widely used in blast furnace ironmaking systems, including furnace hearth, main ditch, slag ditch, iron ditch, swing chute, torpedo tank and other parts. The use of this material can greatly Improve the performance and service life of the blast furnace ironmaking system. al 2 o 3 The use of -SiC-C castable castables can greatly increase the service life of the iron trough. With Al 2 o 3 -Universal use of SiC-C refractories in large blast furnaces, Al 2 o 3 -The consumption of SiC-C iron channel castables has increased significantly, and at the same time, the consumption and use of raw materials such as SiC have rapidly increased.

[0003] Because SiC has excellent mechanical properties, wear res...

Examples

Embodiment 1

[0030] A kind of regenerated silicon carbide Al 2 o 3 -SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 62%, regenerated silicon carbide is 20%, active Al 2 o 3 Micropowder is 6%, silicon micropowder is 3%, carbon black is 2%, antioxidant is 2.5%, pure calcium aluminate cement is 3%, asphalt is 1.5%;

[0031] Add explosion-proof fibers accounting for 0.05% of the total amount of the above raw materials, water reducing agents accounting for 0.06% of the total amount of the above raw materials, and dispersants accounting for 0.08% of the total amount of the above raw materials;

[0032] Among the above raw materials:

[0033] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 15% for 3-1mm, 35% for 1-0mm, and 50% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

...

Embodiment 2

[0043] A kind of regenerated silicon carbide Al 2 o 3 -SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 60%, regenerated silicon carbide is 20%, active Al 2 o 3 Micropowder is 5%, silicon micropowder is 3%, carbon black is 3%, antioxidant is 2.5%, pure calcium aluminate cement is 4%, asphalt is 2.5%;

[0044] Add explosion-proof fiber accounting for 0.08% of the total amount of raw materials, water reducing agent accounting for 0.08% of the total amount of raw materials and dispersant accounting for 0.08% of the total amount of raw materials.

[0045] Among the above raw materials:

[0046] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 15% for 3-1mm, 35% for 1-0mm, and 50% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

[0047] The content of C in the car...

Embodiment 3

[0056] A kind of regenerated silicon carbide Al 2 o 3 - SiC-C iron channel castable, which is prepared from the following raw materials by weight percentage: brown corundum is 60%, regenerated silicon carbide is 24%, active Al 2 o 3 Micropowder is 4%, silicon micropowder is 2%, carbon black is 3%, antioxidant is 2%, pure calcium aluminate cement is 3%, asphalt is 2%;

[0057] Add explosion-proof fiber accounting for 0.08% of the total amount of raw materials, water reducer accounting for 0.08% of the total amount of raw materials and dispersant accounting for 0.10% of the total amount of raw materials.

[0058] Among the above raw materials:

[0059] The regenerated silicon carbide includes the following raw materials with different particle size distributions: 20% for 3-1mm, 40% for 1-0mm, and 40% for -200 mesh; the SiC content in the regenerated silicon carbide is 78%- 85%, Al 2 o 3 The content is 8-12%, Fe 2 o 3 ≤0.5%;

[0060] The content of C in the carbon black ...

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