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Ventilated brick and preparation method thereof

A technology of breathable bricks and particle size range, applied in the field of refractory materials, can solve the problems of high sintering temperature, no resistance to slag penetration, and short service life.

Inactive Publication Date: 2013-04-03
山东华强环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing air-permeable bricks generally have the disadvantages of not being resistant to slag penetration and being easily melted and peeled off, with short service life, high sintering temperature and high production energy consumption.

Method used

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  • Ventilated brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A kind of breathable brick, the weight part of raw material is composed of:

[0100] ①Dense fused corundum: particle size range 8~5mm 14 parts

[0101] ②Sintered tabular alumina: particle size range 6~3mm 28 parts

[0102] Particle size range 3 ~ 1mm 15 parts

[0103] Particle size range 1~0mm 15 parts

[0104] 100 mesh 6 parts

[0105] ③Sintered spinel: 2 parts of 100 mesh

[0106] ④ Fused magnesia: 0.5 part of 200 mesh

[0107] ⑤ Activated alumina micropowder: particle size ≤ 4.5μm 3 parts

[0108] ⑥Industrial chromium oxide: particle size ≤5μm 2 parts

[0109] ⑦Alumina-rich spinel powder: particle size ≤4.5μm 9 parts

[0110] ⑧Pure calcium aluminate cement: 2 parts

[0111] ⑨SM water reducer: 0.16 parts

[0112] SN-2 superplasticizer: 0.03 parts

[0113] ⑩Spray aluminum powder: 0.025 parts of 60-150 mesh

[0114] Polypropylene fiber: 0.06 copies;

[0115] The preparation steps are as foll...

Embodiment 2

[0125] A kind of breathable brick, the weight part of raw material is composed of:

[0126] ①Dense fused corundum: particle size range 8~5mm 18 parts

[0127] ②Sintered tabular alumina: particle size range 6~3mm 32 parts

[0128] Particle size range 3~1mm 21 parts

[0129] Particle size range 1~0mm 21 parts

[0130] 100 mesh 10 parts

[0131] ③Sintered spinel: 6 parts of 100 mesh

[0132] ④ Fused magnesia: 2 parts of 200 mesh

[0133] ⑤Activated alumina micropowder: particle size ≤4.5μm 6 parts

[0134] ⑥Industrial chromium trioxide: particle size ≤5μm 4 parts

[0135] ⑦Alumina-rich spinel powder: particle size ≤4.5μm 15 parts

[0136] ⑧Pure calcium aluminate cement: 4 parts

[0137] ⑨SM water reducer: 0.25 parts

[0138] SN-2 superplasticizer: 0.06 parts

[0139] ⑩Spray aluminum powder: 0.025 parts of 60-150 mesh

[0140] Polypropylene fiber: 0.07 copies;

[0141] The preparation steps are the sam...

Embodiment 3

[0143] A kind of breathable brick, the weight part of raw material is composed of:

[0144] ①Dense fused corundum: particle size range 8~5mm 15 parts

[0145] ②Sintered tabular alumina: particle size range 6~3mm 28 parts

[0146] Particle size range 3~1mm 16 parts

[0147] Particle size range 1~0mm 16 parts

[0148] 100 mesh 7 parts

[0149] ③Sintered spinel: 4 parts of 100 mesh

[0150] ④ Fused magnesia: 200 mesh 1 part

[0151] ⑤Activated alumina micropowder: particle size ≤4.5μm 4 parts

[0152] ⑥Industrial chromium oxide: particle size ≤5μm 2 parts

[0153] ⑦Alumina-rich spinel powder: particle size ≤4.5μm 11 parts

[0154] ⑧Pure calcium aluminate cement: 2 parts

[0155] ⑨SM water reducer: 0.16 parts

[0156] SN-2 superplasticizer: 0.03 parts

[0157] ⑩Spray aluminum powder: 0.025 parts of 60-150 mesh

[0158] Polypropylene fiber: 0.07 copies;

[0159] The preparation steps are the same as in E...

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Abstract

The invention relates to a ventilated brick and a preparation method thereof. The ventilated brick is composed of the following raw materials: compact fused corundum, sintered tabular corundum, sintered spinel, fused magnesite, active alumina micro powder, industrial chromium trioxide, aluminium-enriched spinel micro powder, pure calcium aluminate cement, SM water reducing agent, SN-2 water reducing agent, sprayed aluminium powder and polypropylene fibre. The invention further relates to the preparation method of the ventilated brick. The ventilated brick prepared by the invention has the advantages of being strong in anti-pressure ability, long in service life, high in high-temperature resistant strength, good in anti-residue permeability and melting loss resistant peeling property, low in sintering temperature, low in energy consumption, clean, free from pollution, and simple and environment-friendly in preparation process; one ventilated brick can be used for above 90 times; and the sintering temperature is only 1200-1550 DEG C.

Description

Technical field: [0001] The invention relates to a breathable brick and a preparation method thereof, belonging to the technical field of refractory materials. Background technique: [0002] At the end of the 20th century, a technology developed in the field of iron and steel smelting to remove impurities in molten steel, that is, the blowing technology of installing breathable bricks at the bottom of the ladle, the principle is to install breathable bricks at the bottom of the ladle, and blow oxygen or Other gases, on the one hand, further reduce impurities such as carbon in molten steel, and on the other hand, the blown gas flows from bottom to top in molten steel to stir molten steel, thereby improving the efficiency of smelting. Air permeable bricks play a key role in this process. They are mainly made of refractory materials and must have good air permeability, high temperature resistance strength and slag penetration resistance. [0003] Chinese patent document CN1005...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 郭树杰郭宁
Owner 山东华强环保科技有限公司
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