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Lightweight dispersion-type ventilating brick and preparation method thereof

A breathable brick, lightweight technology, applied to ceramic products, other household appliances, applications, etc., can solve the problems of difficult process control, environmental pollution, increased cost, etc., to achieve easy process control, good air permeability, and small environmental pollution Effect

Active Publication Date: 2016-08-17
江苏锦耐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that at present, the diffused gas permeable bricks mostly use the foaming method and the burnout method to form the diffused gas channel, the process is not easy to control, and the cost is increased, and the gas generated by the burnout method pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A light-weight dispersion-type air-permeable brick and a preparation method thereof. With 68~72wt% light corundum as aggregate, 10~11.5wt% sintered spinel fine powder, 15~17wt% calcined alumina fine powder and 3~3.5wt% ρ-Al 2 o 3 Micropowder is the base material, add 0.8~1.0wt% water reducing agent and 27~30wt% water of the sum of the aggregate and the base material, stir for 4~6min, pour into molding, and stand at room temperature for 18~26h , Dry at 100~120°C for 24~32h, and then keep warm at 1400~1540°C for 3~6h to get lightweight diffused air permeable brick.

[0024] The lightweight diffused air permeable brick prepared in this example is tested: the apparent porosity is 52%~60%, and the air permeability is 40~50×10 -12 μm 2 , the bulk density is 1.6~1.7g / cm 3 , The compressive strength after firing is 20~26MPa.

Embodiment 2

[0026] A light-weight dispersion-type air-permeable brick and a preparation method thereof. With 64~68wt% light corundum as aggregate, 11.5~13wt% sintered spinel fine powder, 17~19wt% calcined alumina fine powder and 3.5~4wt% ρ-Al 2 o 3 Micropowder is the base material, add 0.8~1.0wt% water reducer and 26~29wt% water of the sum of the aggregate and the base material, stir for 4~6min, pour into molding, and stand at room temperature for 18~26h , Dry at 100~120°C for 24~32h, and then keep warm for 3~6h at 1420~1560°C to get lightweight diffused air permeable bricks.

[0027] The lightweight diffused air permeable brick prepared in this example is tested: the apparent porosity is 48%~57%, and the air permeability is 35~47×10 -12 μm 2 , the bulk density is 1.65~1.75g / cm 3 , The compressive strength after firing is 23~28MPa.

Embodiment 3

[0029] A light-weight dispersion-type air-permeable brick and a preparation method thereof. With 60~64wt% light corundum as aggregate, 13~14.5wt% sintered spinel fine powder, 19~21wt% calcined alumina fine powder and 4~4.5wt% ρ-Al 2 o 3 Micropowder is the base material, add 0.8~1.0wt% water reducer and 25~28wt% water of the sum of the aggregate and the base material, stir for 4~6min, pour into molding, and stand at room temperature for 18~26h , Dry at 100~120°C for 24~32h, and then keep warm for 3~6h at 1440~1580°C to get lightweight diffused air permeable brick.

[0030] The lightweight diffused air permeable brick prepared in this example is tested: the apparent porosity is 46~53%, and the air permeability is 31~45×10 -12 μm 2 , the bulk density is 1.67~1.79g / cm 3 , The compressive strength after firing is 25~32MPa.

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Abstract

The invention provides a lightweight dispersion-type ventilating brick and a preparation method thereof. A technical scheme is as below: stirring an aggregate of 40-72wt% of lightweight corundum, matrix materials including 10-22wt% of sintered spinel, 15-31wt% of calcined alumina powder and 3-7wt% of rho-Al2O3 powder, and water-reducing agent accounting for 0.8-1.0wt% of the total weight of the aggregate and the matrix materials and water accounting for 20-30wt% of the total weight of the aggregate and the matrix materials for 4-6 min; casting, allowing to stand at room temperature for 18-26 h, drying at 100-120 DEG C for 24-32 h, then insulating at 1400-1680 DEG C for 3-6 h to obtain the lightweight dispersion-type ventilating brick. The lightweight corundum through pores accounted for 30-40% in volume of the lightweight corundum particles. The present invention has the advantages of easiness to control process, low cost and little environmental pollution; and the prepared lightweight dispersion-type ventilating brick has good, penetration, excellent anti-osmotic performance and high strength.

Description

technical field [0001] The invention belongs to the technical field of dispersion-type air-permeable bricks. In particular, it relates to a light-weight dispersion-type air-permeable brick and a preparation method thereof. Background technique [0002] Permeable brick is a kind of refractory material widely used in iron and steel metallurgical industry. It is mainly installed in metallurgical industrial equipment such as converter, electric furnace or ladle. Its main function is to blow inert gas such as argon and nitrogen into metallurgical equipment. Float up to remove inclusions in the molten steel. By stirring the molten steel, it plays a role in uniforming the temperature of the molten steel and the composition of the molten steel, which can greatly improve the smelting efficiency. [0003] Permeable bricks are divided into diffuse type, straight-through type and slit type permeable bricks. The diffused air brick has the characteristics of high air permeability stabil...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/66
CPCC04B35/101C04B38/00
Inventor 李远兵王庆恒王兴东李淑静
Owner 江苏锦耐新材料科技有限公司
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