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Aluminum-magnesium series lightweight pouring material and manufacturing method thereof

A lightweight castable, magnesium-based technology, applied in the field of lightweight thermal insulation refractories, can solve the problems of poor thermal shock stability and resistance to medium erosion, and achieve good resistance to medium erosion, good thermal shock stability, high intensity effect

Inactive Publication Date: 2007-08-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The materials described in the above two patent applications are shaped products. Although the distribution of pores and matrix is ​​very uniform, it is a good thermal insulation material, but its thermal shock resistance and medium erosion resistance are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An aluminum-magnesium-based lightweight castable and its preparation method: porous corundum-spinel ceramics with a particle size of 5-3 mm, porous corundum-spinel ceramics with a particle size of 3-1 mm, corundum-spinel Fine powder, magnesia fine powder, pure calcium aluminate cement and activated α-alumina micro-powder are respectively 25-35%, 25-35%, 20-30%, 1-5%, 2-5% by mass Mix with 2-5%. 13-15% of water, 0.5% of silicon oxide micropowder and 0.2% of sodium tripolyphosphate are added, mixed evenly, and poured and vibrated into shape. Dry naturally in the air for 24 hours, and then dry at 110°C for 24 hours.

[0016] Among them: the MgO mass percentage content of porous corundum-spinel ceramics with a particle size of 5-3 mm and 3-1 mm is 18%, the apparent porosity is 45%, the average pore diameter is 10 μm, and the mass percentage content of impurities is less than 2%; The corundum-spinel fine powder has a MgO mass percentage of 12%, a particle size of less than...

Embodiment 2

[0019] An aluminum-magnesium-based lightweight castable and its preparation method: porous corundum-spinel ceramics with a particle size of 5-3 mm, porous corundum-spinel ceramics with a particle size of 3-1 mm, corundum-spinel , corundum-spinel fine powder, pure calcium aluminate cement and activated α-alumina fine powder are respectively 10-20%, 40-50%, 1-5%, 20-30%, 2-6% by mass. % mixed with 2-4%. Add 14-15% of water, 0.1-0.5% of silicon oxide micropowder and 0.2% of sodium tripolyphosphate in the mass percentage of the above mixture, mix evenly, cast and vibrate to form. Naturally dry in air for 24 hours, then dry at 110°C for 48 hours.

[0020] Among them: the MgO mass percentage content of porous corundum-spinel ceramics with a particle size of 5-3 mm and 3-1 mm is 22%, the apparent porosity is 48%, the average pore diameter is 15 μm, and the mass percentage content of impurities is less than 1.8%; The mass percentage of MgO of corundum-spinel is 12%, the particle siz...

Embodiment 3

[0023] An aluminum-magnesium light-weight castable and its preparation method: porous corundum with a particle size of 5-3 mm, porous corundum with a particle size of 3-1 mm, corundum-spinel fine powder, pure calcium aluminate cement and active The α-alumina micropowder is mixed according to mass percentages of 20-30%, 20-30%, 40-50%, 2-8% and 1-4% respectively. Add 15-18% of water and 0.2-1% of silicon oxide micropowder in the mass percentage of the above-mentioned mixture, mix evenly, pour and vibrate to form. Naturally dry in air for 24 hours, then dry at 110°C for 48 hours.

[0024] Among them: the apparent porosity of the porous corundum with a particle size of 5-3 mm and 3-1 mm is 55%, the average pore size is 20 μm, and the mass percentage of impurities is less than 3%; the mass percentage of MgO of the corundum-spinel fine powder is 12%, the particle size is less than 88 μm, and the mass percentage of impurities is less than 3%; the particle size of activated α-alumin...

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Abstract

The invention discloses a making method of aluminium-magnesium systemic light-quality casting material, which comprises the following steps: adopting 40-70% aluminium-magnesium porous ceramic particle and 0-20% aluminium-magnesium particle as aggregate; selecting 15-55% fine aluminium-magnesium powder, 2-15% pure calcium aluminate and 2-8% active alpha-aluminium micropowder as substrate; blending the mass; adding 8-25% water, 0.1-0.8% silica powder and 0-3% dehydragent to stir evenly; casting; vibrating; moulding; drying for 8-48h under 110 deg.c.

Description

technical field [0001] The invention belongs to the technical field of lightweight thermal insulation refractory materials. In particular, it relates to an aluminum-magnesium series lightweight castable and a preparation method thereof. Background technique [0002] With the increasing demand for energy saving, the research and development of lightweight insulation materials is developing rapidly. In terms of lightweight unshaped refractory materials, various lightweight castables have been developed: such as vermiculite, perlite, ceramsite, refractory lightweight aggregate and fiber castables. However, these refractory lightweight castables have their own scope of application. The use temperature of vermiculite, perlite, ceramsite and fiber castables is relatively low, and refractory lightweight aggregates can be used to manufacture castables suitable for various temperatures, but the current lightweight Aggregate castable insulation materials mostly belong to Al 2 o 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B28/06C04B14/30C04B22/16C04B24/04
Inventor 李楠鄢文
Owner WUHAN UNIV OF SCI & TECH
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