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Magnesium aluminate spinel light refractory castable and production method thereof

A magnesia-aluminum spinel and refractory castable technology, applied in the field of refractory materials, can solve the problems of low porosity and high bulk density of lightweight cement-free castables

Active Publication Date: 2013-04-03
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the porosity of lightweight cement-free castables obtained by the above two methods is relatively low, and the bulk density is relatively high, because the main source of pores in the material is lightweight aggregate

Method used

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  • Magnesium aluminate spinel light refractory castable and production method thereof

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Embodiment 1

[0025] A magnesium-aluminum spinel lightweight refractory castable and its preparation method: light magnesium-aluminum spinel particles with a particle size of 0.088-5 mm, sintered magnesium-aluminum spinel fine powder with a particle size of <0.088 mm, and an average particle size of Alumina micropowder with a diameter of <5 μm and hydrated alumina with an average particle size of <5 μm were mixed at 60 wt %, 15 wt %, 10 wt %, and 15 wt %, respectively, and 0.1 wt % of polyethylene glycol produced by BASF of Germany was added as a raw material. Alcohol-type water reducer CAMTMENT FS10 is stirred with 15 wt % water as raw material, and then 1 wt % sodium dodecylbenzenesulfonate foaming agent is added as raw material. According to the volume change of the mixed material before and after foaming, it can be seen that the original mixed material About 50% of the volume of the foam is fully stirred, and finally 1wt% of the raw material aluminum sol is added as a foam stabilizer and...

Embodiment 2

[0029]A magnesium-aluminum spinel lightweight refractory castable and its preparation method: light magnesium-aluminum spinel particles with a particle size of 0.088-5 mm, sintered magnesium-aluminum spinel fine powder with a particle size of <0.088 mm, and an average particle size of Alumina micropowder with a diameter of <5 μm and hydrated alumina with an average particle size of <5 μm were mixed at 63 wt %, 10 wt %, 10 wt %, and 17 wt %, respectively, and 0.2 wt % of polyethylene glycol produced by BASF of Germany was added as a raw material. Alcohol-type water reducer CAMTMENT FS10 is stirred with 15 wt % water, and then 1 wt % sodium dodecylbenzenesulfonate foaming agent is added as a raw material. According to the volume change of the mixture before and after foaming, the volume of the original mixture can be known About 50% of the foam was fully stirred, and finally 1wt% of the raw material aluminum sol was added as a foam stabilizer and stirred for 2 minutes to obtain a...

Embodiment 3

[0033] A magnesium-aluminum spinel lightweight refractory castable and its preparation method: light magnesium-aluminum spinel particles with a particle size of 0.088-5 mm, sintered magnesium-aluminum spinel fine powder with a particle size of <0.088 mm, and an average particle size of Alumina micropowder with a diameter of <5 μm and hydrated alumina with an average particle size of <5 μm were mixed at 60 wt %, 12 wt %, 13 wt %, and 15 wt %, respectively, and 0.2 wt % of polyethylene glycol produced by BASF of Germany was added as a raw material. Alcohol-type water reducer CAMTMENT FS10 and 22 wt% water are stirred, and then LC-01 foam concrete foaming agent produced by Henan Changhuizhu Energy Conservation Engineering Co., Ltd. is added with 1wt% raw material. It can be seen from the changes that about 60% of the volume of the original mixture is produced, and the foam is fully stirred. Finally, 2 wt % of the raw material aluminum sol is added as a foam stabilizer and stirred ...

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Abstract

The invention relates to a magnesium aluminate spinel light refractory castable and a production method thereof. According to the magnesium aluminate spinel light refractory castable and the production method thereof, the purpose of improving the porosity of the refractory castable is achieved by using magnesium aluminate spinel light aggregate and introducing air bubbles during the production of the castable. According to the magnesium aluminate spinel light refractory castable and the production method thereof, a foaming method and castable are combined, not only is the characteristic of large raw critical particle size in the castable ensured but also the porosity of the castable is improved. According to the magnesium aluminate spinel light refractory castable and the production method thereof, 50-65 wt% of light magnesium aluminate spinel particles which serve as the aggregate and 10-15 wt% of sintered magnesium aluminate spinel fine powder, 10-15 wt% of aluminum oxide micro powder and one of 15-20 wt% of pure calcium aluminate cement or hydrated alumina which serve as the matrix are mixed; and a water reducing agent, a foaming agent and a foam stabilizer are added. The magnesium aluminate spinel light refractory castable produced according to the method provided by the invention has high porosity, low thermal conductivity and good thermal shock resistance, and the serviceability temperature reaches 1700 DEG C.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. Specifically relates to a magnesium aluminum spinel lightweight refractory castable and a preparation method thereof. technical background [0002] The contradiction between energy shortage and rapid economic growth has become increasingly prominent, and energy conservation and consumption reduction have become our basic national policy. Insulating refractory materials are widely used in reducing energy consumption of high-temperature equipment and meeting special high-temperature process requirements. In recent years, with the rapid development of lightweight heat insulation materials, vermiculite, perlite and ceramsite castables have been developed in lightweight refractory castables, but these lightweight refractory castables are based on lightweight aggregate The pores in the castable are the main source of pores in the castable, and the pores in the matrix are relatively few,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B35/66
Inventor 张伟石干冯志源王守业袁波
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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