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Corrosion-resistant refractory brick and preparation method thereof

A refractory brick and anti-corrosion technology, applied in the field of refractory materials, can solve the problems of insufficient slag resistance, alkali metal erosion resistance, insufficient uniform dispersion of refractory bricks, easy flocculation of lime milk solution, etc., and achieves abundant raw materials and alkali metal erosion. Strong performance and excellent thermal insulation performance

Inactive Publication Date: 2017-05-31
新昌县永佳耐火材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects that the existing refractory bricks are not strong enough to resist slag and alkali metal erosion, the particle size is not fine enough during production, the dispersion in the refractory bricks is not uniform enough, and the lime milk solution is easy to flocculate and not easy to disperse. Excellent performance, erosion resistance, excellent thermal insulation performance, good volume stability at high temperature, corrosion-resistant refractory brick

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A corrosion-resistant refractory brick made of the following raw materials in parts by weight: 15 parts of silica powder, 20 parts of magnesia-alumina spinel, 5 parts of activated alumina, 6 parts of ferric oxide, 4 parts of graphene, and 1 part of fluorite powder , 0.2 parts of boron nitride, 2 parts of binder and 5 parts of nano magnesium oxide.

[0022] The particle size of the silica powder is 0.5 μm.

[0023] The fluorite powder is 200 mesh.

[0024] Described binding agent is seaweed extract, and the preparation method of this binding agent is as follows:

[0025] 1) Cleaning: Soak the seaweed raw material in tap water at 45-50°C for 2 hours, and then clean it;

[0026] 2) Pulverization and centrifugation: clean the seaweed, crush it in vacuum, add ethanol and butylene glycol solution 30 times the volume of seaweed to soak and boil, the volume ratio of ethanol and butylene glycol is 1:1, then centrifuge to remove slag to obtain seaweed For clear liquid, the spe...

Embodiment 2

[0031] A corrosion-resistant refractory brick made of the following raw materials in parts by weight: 30 parts of silica powder, 40 parts of magnesia-aluminum spinel, 10 parts of activated alumina, 12 parts of ferric oxide, 8 parts of graphene, and 3 parts of fluorite powder , 1 part of boron nitride, 5 parts of binder and 10 parts of nano magnesium oxide.

[0032] The particle size of the silica powder is 2 μm.

[0033] The fluorite powder is 300 mesh.

[0034] Described binding agent is seaweed extract, and the preparation method of this binding agent is as follows:

[0035] 1) Cleaning: soak the seaweed raw material in tap water at 45-50°C for 3 hours, and then clean it;

[0036] 2) Pulverization and centrifugation: clean the seaweed, crush it in vacuum, add ethanol and butylene glycol solution 30 times the volume of seaweed to soak and boil, the volume ratio of ethanol and butylene glycol is 1:1, then centrifuge to remove slag to obtain seaweed For clear liquid, the spe...

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Abstract

The invention discloses a corrosion-resistant refractory brick which is prepared from the following raw materials in parts by weight: 15 to 30 parts of silicon powder, 20 to 40 parts of magnesium aluminated spinel, 5 to 10 parts of activated aluminum oxide, 6 to 12 parts of iron trioxide, 4 to 8 parts of graphene, 1 to 3 parts of fluorite powder, 0.2 to 1 part of boron nitride, 2 to 5 parts of binding agent and 5 to 10 parts of nanometer magnesia. A preparation method of the corrosion-resistant refractory brick comprises the steps of weighing all the raw materials according to the matching, mixing and shaping, then utilizing a mould-pressing vibration shaping machine to manufacture a green brick, roasting, then putting into a dipping tank to be vacuumized, adding impregnant after press maintaining and calcinating. The refractory brick disclosed by the invention has the beneficial effects of excellent performance, strong slag and alkali metal corrosion resistance, excellent washing resistance and thermal insulation performance and good high-temperature volume stability. The preparation method disclosed by the invention is simple, rich in raw materials and suitable for factory production.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory brick with strong resistance to slag and alkali metal erosion, erosion resistance, excellent heat insulation performance and good high-temperature volume stability and a preparation method thereof. Background technique [0002] With the increasing shortage of energy, countries pay more and more attention to the development, production and use of energy-saving materials for high-temperature industry. Refractory bricks have been widely used and researched in lightweight refractory systems due to their high load softening temperature, good volume stability at high temperatures, and no shrinkage after long-term use. [0003] Due to the large volume expansion caused by the rapid crystal transformation of silica during heating, the firing of refractory bricks is more difficult than other refractory materials. The core technology for manufacturing refractory b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/443C04B35/632
CPCC04B35/66C04B35/443C04B35/632C04B2235/3206C04B2235/3217C04B2235/3272C04B2235/3418C04B2235/386C04B2235/425C04B2235/445C04B2235/9669C04B2235/9692
Inventor 傅小娟
Owner 新昌县永佳耐火材料厂
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