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Resintered fused mullite brick and preparation method and application thereof

A technology of fused mullite and mullite bricks, applied in the field of refractory materials, can solve the problem of high porosity

Pending Publication Date: 2021-02-09
广州市白云区石井特种耐火材料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional fused mullite generally has the problem of high porosity, which limits its further application.

Method used

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  • Resintered fused mullite brick and preparation method and application thereof
  • Resintered fused mullite brick and preparation method and application thereof
  • Resintered fused mullite brick and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The present invention also provides a method for preparing re-sintered fused mullite bricks, which includes the following steps S1-S4.

[0035] Step S1: mixing fused mullite ball powder, fused mullite fine powder, α-alumina fine powder, kaolin and peach gum powder in a cone mixer for 1.5h-2.5h to obtain mixed powder.

[0036] Specifically, the above-mentioned mixing time in the cone mixer can be, for example, 1.5h, 1.8h, 2h, 2.2h or 2.5h.

[0037]Step S2: Put the fused mullite coarse material, fused mullite coarse material and fused mullite coarse material into the inclined mixer in turn, then add peach glue, add the mixed powder after 1min to 2min, and mix for about 5min After ~8 minutes, seal the bag and trap the material to obtain the mixture.

[0038] Specifically, the above mixing time may be, for example, 5 min, 6 min, 7 min or 8 min.

[0039] In a specific embodiment, the moisture content of the molding material is 1.0% to 1.5%, and the time for sealing and tra...

Embodiment 1

[0047] This embodiment provides a re-sintered fused mullite brick, and its raw material powder ratio is shown in Table 1.

[0048] Mix fused mullite ball powder, fused mullite fine powder, α-alumina fine powder, kaolin and peach gum powder in a cone mixer for 2 hours to obtain mixed powder.

[0049] Put the fused mullite coarse material, fused mullite coarse material and fused mullite coarse material into the inclined mixer in turn, then add peach glue, add the mixed powder after 2 minutes, and seal the bag after mixing for about 5 minutes , The time for sealing the bag and trapping the material was 12h to obtain the mixture.

[0050] The mixture was molded in a friction press to obtain a molding material with a moisture content of 1.13%.

[0051] The molding material is placed in a tunnel kiln for sintering at a firing temperature of 1700°C and kept for 10 hours.

Embodiment 2

[0053] This embodiment provides a re-sintered fused mullite brick, and its raw material powder ratio is shown in Table 1.

[0054] Mix fused mullite ball powder, fused mullite fine powder, α-alumina fine powder, kaolin and peach gum powder in a cone mixer for 2 hours to obtain mixed powder.

[0055] Put the fused mullite coarse material, fused mullite coarse material and fused mullite coarse material into the inclined mixer in turn, then add peach glue, add the mixed powder after 2 minutes, and seal the bag after mixing for about 5 minutes , The time for sealing the bag and trapping the material was 12h to obtain the mixture.

[0056] The mixed material was molded in a friction press to obtain a molding material with a moisture content of 1.29%.

[0057] The molding material is placed in a tunnel kiln for sintering at a firing temperature of 1700°C and kept for 10 hours.

[0058] For the fused mullite bricks in Examples 3 to 21, the raw materials are fed according to Table 1...

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Abstract

The invention discloses a resintered fused mullite brick and a preparation method and application thereof. The resintered fused mullite brick comprises the following raw materials in percentage by weight: 20-40% of fused mullite coarse material, 8-35% of fused mullite medium material, 8-35% of fused mullite fine material, 3-35% of fused mullite ball powder, 1.5-20% of fused mullite micro powder, 0-6% of alpha alumina micro powder, 0%-8% of kaolin, 1%-2% of a solid binding agent and 1%-2% of a liquid binding agent; the resintered fused mullite brick has characteristics of low porosity, good quality and prolonged service life, and further has low creep rate at a high temperature.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a resintered fused mullite brick and its preparation method and application. Background technique [0002] Mullite is a high-quality refractory material, which has the characteristics of uniform expansion, excellent thermal shock stability, high load softening point, low high temperature creep value, high hardness and excellent chemical corrosion resistance. According to the synthesis method, it can be divided into sintered mullite bricks and fused mullite bricks. Compared with sintered mullite, fused mullite has well-developed crystals, large grains, fewer defects, and hundreds of times the crystal size of sintered mullite, so it has better high-temperature mechanical properties and corrosion resistance. Fused mullite bricks are mainly used in the superstructure of thermal furnaces and parts with high thermal stress, such as E-glass, borosilicate glass furnace brea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185
CPCC04B35/66C04B35/185C04B2235/3217C04B2235/349C04B2235/5427C04B2235/5436C04B2235/602C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 符启慧刘华利萧子良李超林韦修功
Owner 广州市白云区石井特种耐火材料厂
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