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Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof

A magnesia-aluminum spinel brick and magnesia-aluminum spinel technology is applied in the field of refractory materials of inorganic non-metallic materials to achieve the effects of high alkali erosion resistance and thermal shock resistance

Active Publication Date: 2015-01-21
青岛中瑞泰达催化新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to change the defect that magnesium aluminum spinel is not easy to form compact products, the present invention adds additives and sintering aids ZrO2, CaO and Fe2O3

Method used

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  • Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof
  • Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof
  • Recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and production technology thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw material is 40wt% of fused magnesia aluminum spinel sand with a particle size of 5-3mm, 20wt% of fused magnesia aluminum spinel sand with a particle size of 4-2mm, and fused magnesia spinel sand with a particle size of 1-0mm 10wt%, fused magnesia-alumina spinel sand with a particle size of 150 mesh 10wt%, fused magnesia-alumina spinel sand fine powder with a particle size of 250 15wt%, desiliconized zirconia powder with a particle size of 250 mesh 2wt%, iron oxide powder with a particle size of 250 mesh 2wt%, 1wt% calcium oxide powder with a particle size of 250 meshes. Add the above raw materials into large granules first, then add 1.6wt% of the adjusted binder, then add fine granules, fine powder, and micropowder in turn, and wet mill for 8 minutes. Using hydraulic pressure of 300MPa, keep forming for 60s. After natural drying for 48 hours, push it into a drying kiln at 120°C for 48 hours. Fire at 1560°C for 4 hours.

[0027] The main crystal phase of the r...

Embodiment 2

[0031] The raw material is 30wt% of fused magnesia aluminum spinel sand with a particle size of 5-3mm, 30wt% of fused magnesia aluminum spinel sand with a particle size of 4-2mm, and fused magnesia spinel sand with a particle size of 1-0mm 15wt%, fused magnesia-alumina spinel sand with a particle size of 150 mesh 10wt%, fused magnesia-alumina spinel sand fine powder with a particle size of 250 10wt%, desiliconized zirconia powder with a particle size of 250 mesh 3wt%, iron oxide powder with a particle size of 250 mesh 1wt%, 1wt% of calcium oxide micropowder with a particle size of 250 mesh. Add the above raw materials into large granules first, then add 1.3wt% of the adjusted binder, then add fine granules, fine powder, and micropowder in turn, and wet mill for 10 minutes. Using hydraulic pressure of 400MPa, keep forming for 60s. After natural drying for 24 hours, push it into a drying kiln at 160°C for 48 hours. Fire at 1710°C for 5 hours.

[0032] The main crystal phase o...

Embodiment 3

[0036] The raw material is 35wt% of fused magnesia aluminum spinel sand with a particle size of 5-3mm, 25wt% of fused magnesia aluminum spinel sand with a particle size of 4-2mm, and fused magnesia spinel sand with a particle size of 1-0mm 8wt%, fused magnesia aluminum spinel sand with a particle size of 150 mesh 15wt%, fused magnesia aluminum spinel sand fine powder with a particle size of 250 14wt%, desiliconized zirconia powder with a particle size of 250 mesh 1wt%, iron oxide powder with a particle size of 250 mesh 1wt%, 1wt% of calcium oxide micropowder with a particle size of 250 mesh. Add the above raw materials into large granules first, then add 1.5wt% of the adjusted binder, then add fine granules, fine powder, and micropowder in turn, and wet mill for 12 minutes. Formed by friction press. After natural drying for 24 hours, push it into a drying kiln at 110°C for 48 hours. It was fired at 1640°C for 4 hours.

[0037] The main crystal phase of the recombined magnes...

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Abstract

The invention relates to a recombined magnesia-alumina spinel brick with properties of nodulation and blockage prevention and high corrosion resistance, and a production technology thereof. A formula of the recombined magnesia-alumina spinel brick comprises 30 to 40 wt% of fused magnesia-alumina spinel sand with a granularity of 5 to 3 millimeters, 20 to 35 wt% of fused magnesia-alumina spinel sand with a granularity of 4 to 2 millimeters, 5 to 15 wt% of fused magnesia-alumina spinel sand with a granularity of 1 to 0 millimeters, 10 to 15 wt% of fused magnesia-alumina spinel sand with a granularity of 150 to 200 meshes, 5 to 10 wt% of fused magnesia-alumina spinel sand with a granularity of 250 meshes, 1 to 3 wt% of ZrO2 with a granularity of 250 meshes, 1 to 2 wt% of Fe2O3 with a granularity of 250 meshes, and 0 to 1 wt% of CaO with a granularity of 250 meshes. Chemical compositions of the magnesia-alumina spinel brick comprises 26 to 40 wt% of MgO, 55 to 68 wt% of Al2O3, 1.0 to 3.0 wt% of ZrO2, 1.0 to 3.0 wt% of Fe2O3, and 0 to 2.0 wt% of CaO. The production technology of the magnesia-alumina spinel brick comprises the following steps of 1), carrying out a pretreatment on magnesia and alumina, carrying out a synthesis of magnesia-alumina spinel sand, wherein the magnesia-alumina spinel sand contains 26 to 40 wt% of MgO and 55 to 70 wt% of Al2O3, smashing the synthetized magnesia-alumina spinel sand into coarse, medium and fine particles respectively with a granularity of 5 to 3 millimeters, a granularity of 4 to 2 millimeters and a granularity of 1 to 0 millimeters and powder respectively with a granularity of 180 meshes and a granularity of 250 meshes, 2), mixing orderly the coarse particles, medium particles, a binder, the magnesia-alumina spinel powder with a granularity of 150 to 200 meshes, the magnesia-alumina spinel powder with a granularity of 250 meshes, and ZrO2, Fe2O3 and CaO powder according to the formula, and carrying wet milling for 8 to 12 minutes, wherein the binder accounts for 1.0 to 1.8 wt% of the mixed material and is a mixed liquor of spent pulping liquor, brine and polycarboxylic acids, 3), compressing the mixed material obtained from the step 2 into required shapes through multiple devices of a friction press, a Sandes brick machine, a Rice brick machine, a hydrostatic press, etc., and roasting at a temperature of 80 to 160 DEG C for 24 to 72 hours, and 4), heating dry green bodies obtained from the step 3 at a temperature of 1560 to 1710 DEG C for 3 to 5 hours to obtain finished products.

Description

Technical field [0001] The present invention involves a kind of refractory material technology field that prepares high -resistant erosion and anti -tumor blockage, and its production process, which is an inorganic non -metallic material technology.This combination of magnesium aluminum spine -spine tiles has the excellent performance of high anti -erosion, heat shock resistance, anti -glass flying adhesion, anti -tumor, and not blocking.It is suitable for glass kiln with cheap fuel, such as glass kiln with coal tar and petroleum coke as fuel. Background technique [0002] The glass industry is an important basic material industry, which is closely related to the development of the national economy.my country is the world's largest glass production country. At the end of 2009, the output of flat glass has accounted for more than 40 % of the global output.Although the output of glass in my country ranks first in the world, there is still a large gap between the glass industry and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/443C04B35/622
Inventor 袁林陈松林王杰曾刘锡俊王晓红曾鲁举陈雪峰翟耀杰李鹏海叶亚红王俊涛
Owner 青岛中瑞泰达催化新材料有限公司