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MgO-CePO4 material and preparation method thereof

A 24-hour, press-forming technology, applied in the field of magnesia refractories, can solve the problems of reduced corrosion resistance and material damage, and achieve the effects of improved mechanical properties, avoiding cracking, and high emissivity

Active Publication Date: 2019-11-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both this patented technology and the aforementioned porous magnesia material have a problem, that is, the corrosion resistance performance will be reduced due to the porous structure of the material, because the pores are the channels for the medium to erode into the material, and the existence of too many pores will cause damage during use. accelerated material damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A MgO-CePO 4 Materials and their preparation methods. First mix 50-60wt% sintered magnesia, 30-40wt% magnesium hydroxide, 5-7wt% cerium phosphate and 4-6wt% aluminate, stir evenly, press and form; dry naturally for 20-22 hours , and then dried at 110-130°C for 20-24 hours, then fired at 1450-1500°C, kept for 3-4 hours, and cooled to obtain MgO-CePO 4 Material.

Embodiment 2

[0028] A MgO-CePO 4 Materials and their preparation methods. First mix 60-70wt% sintered magnesia, 20-30wt% magnesium hydroxide, 7-10wt% cerium phosphate and 1-4wt% aluminate, stir evenly, press to form, and dry naturally for 22-24 hours , and then dried at 130-150°C for 16-20 hours, then fired at 1400-1450°C, kept for 4-6 hours, and cooled to obtain MgO-CePO 4 Material.

Embodiment 3

[0030] A MgO-CePO 4 Materials and their preparation methods. First mix 50-60wt% sintered magnesia, 30-40wt% magnesium hydroxide, 5-7wt% cerium phosphate and 4-5wt% aluminate, mix evenly, press into shape, and dry naturally for 20-22 hours, then dry at 150-180°C for 10-16 hours, then burn at 1350-1400°C, keep warm for 3-4 hours, and cool to obtain MgO-CePO 4 Material.

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Abstract

The invention relates to a MgO-CePO4 material and a preparation method thereof. The technical solution is that the method comprises the following steps: firstly mixing 50-70 wt% of sintered magnesite,20-40 wt% of magnesium hydroxide, 5-10 wt% of cerous phosphate and 1-10 wt% of aluminate, performing uniform stirring, and performing compression moulding; and performing natural drying for 20-24 h,performing drying at 110-200 DEG C for 8-24 h, performing firing at 1300-1600 DEG C, performing heat preservation for 3-6 h, and performing cooling to obtain the MgO-CePO4 material. According to the method provided by the invention, the MgO-CePO4 material prepared by the method has thermal-insulating properties, mechanical properties and erosion resistance, has the characteristics of good thermalresistance performance, a moderate bulk density, moderate strength, low thermal conductivity and strong anti-erosion ability, and can meet the requirements of saving energy and reducing consumption ofindustrial equipment.

Description

technical field [0001] The invention belongs to the technical field of magnesia refractories. In particular a MgO-CePO 4 Materials and their preparation methods. Background technique [0002] Energy saving and consumption reduction is one of the main contents of the current national science and technology development planning outline, and it is also an important issue faced by the high temperature industry for a long time, which is of great significance to sustainable development. Magnesium materials (MgO≥80%) have a series of advantages such as good wear resistance, strong resistance to alkaline slag erosion, large heat capacity and high strength, and China has abundant reserves of magnesia raw materials, so magnesia materials can be used as high-temperature industrial kilns And the insulation material of the container, and has a wide range of applications in practice. [0003] Existing magnesia materials are represented by magnesia bricks, usually sintered magnesia is u...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/04C04B35/622C04B35/626
CPCC04B35/04C04B35/622C04B35/62605C04B38/0645C04B2235/447C04B2235/6567C04B2235/96C04B38/0074
Inventor 魏耀武李炳蓉
Owner WUHAN UNIV OF SCI & TECH
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