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Soda recovery furnace brasque material based on aluminum-rich magnesium aluminate spinel and preparation method thereof

A technology of aluminum-magnesium-aluminum-aluminum spinel and magnesium-aluminum spinel, which is applied in the field of alkali recovery furnace lining material and its preparation based on aluminum-rich magnesium-aluminum spinel, which can solve the problems of large energy consumption, high melting point and complex process, etc. problems, to achieve the effect of reducing erosion, increasing bulk density and simple process

Inactive Publication Date: 2013-08-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But magnesium aluminum spinel (MgAl 2 o 4 ) has a high melting point (2135°C), when preparing periclase-magnesia-alumina spinel bricks or magnesia-alumina spinel bricks, it needs to be fired at 1000°C to 2000°C, which consumes a lot of energy and has a complicated process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An alkali recovery furnace lining material based on aluminum-rich magnesium aluminum spinel and a preparation method thereof. First mix 50-60wt% aluminum-rich 78 magnesia-alumina spinel aggregate and 40-50wt% aluminum-rich 78 magnesia-alumina spinel fine powder into a mixture, and add 4-8.5wt% of the above-mentioned binder , and then carry out stirring, pounding, curing and baking treatment to prepare the alkali recovery furnace lining material based on aluminum-rich magnesium aluminum spinel.

[0019] In this embodiment, the binding agent is water glass.

Embodiment 2

[0021] An alkali recovery furnace lining material based on aluminum-rich magnesium aluminum spinel and a preparation method thereof. Except that binding agent is aluminum dihydrogen phosphate, all the other are the same as embodiment 1.

Embodiment 3

[0023] An alkali recovery furnace lining material based on aluminum-rich magnesium aluminum spinel and a preparation method thereof. First mix 50-60wt% aluminum-rich 85 magnesia-alumina spinel aggregate and 40-50wt% aluminum-rich 85 magnesia-alumina spinel fine powder into a mixture, and add 4-8.5wt% of the above-mentioned binder , and then carry out stirring, pounding, curing and baking treatment to prepare the alkali recovery furnace lining material based on aluminum-rich magnesium aluminum spinel.

[0024] In this embodiment, the binding agent is water glass.

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Abstract

The invention relates to a soda recovery furnace brasque material based on aluminum-rich magnesium aluminate spinel and a preparation method thereof. The preparation method comprises the following steps of: firstly, mixing 50-80wt% of aluminum-rich magnesium aluminate spinel aggregate with 20-50wt% of aluminum-rich magnesium aluminate spinel fine powder to obtain a mixture, adding a binding agent accounting for 4-15wt% of the mixture, stirring, constructing, curing and roasting the mixture to prepare a soda recovery furnace brasque material based on aluminum-rich magnesium aluminate spinel. The main physical properties of the chrome-free and alkali-resistant refractory material based on aluminum-rich magnesium aluminate spinel prepared by the preparation method provided by the invention are as follows: the volume density is 2.60-2.85 g / cm3, the compression strength is 30-45 MPa, and the linear changing rate is 0.19-0.47%. The preparation method provided by the invention has the advantages of simple technique and low energy consumption, and the prepared soda recovery furnace brasque material based on aluminum-rich magnesium aluminate spinel is free of chromium and is excellent in alkali corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of lining materials for alkali recovery furnaces, and in particular relates to a lining material for alkali recovery furnaces based on aluminum-rich magnesium aluminum spinel and a preparation method thereof. Background technique [0002] Alkali recovery furnaces in paper mills have long used chromium refractory materials as furnace lining materials. During use, part of the chromium in bricks will be converted from Cr 3+ into highly toxic and carcinogenic Cr 6+ , thus destroying the environment and threatening human health. With the continuous enhancement of people's awareness of environmental protection, it is imperative to develop refractory materials for chromium-free and alkali-resistant recovery furnaces. [0003] In recent years, a lot of work has been done at home and abroad to find alternative materials for magnesia-chrome bricks. The alternative materials are mainly dolomite refractories and magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 顾华志段辉谢静李洪明邵志君孙光思李霞
Owner WUHAN UNIV OF SCI & TECH
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