High-strength lightweight forsterite fireproof material and preparation method therefor

A technology of refractory materials and lightweight magnesium, which is applied in the field of high-strength lightweight forsterite refractory materials and its preparation, can solve the problems of restricting the application of refractory products, unstable high-temperature properties of forsterite, and affecting the high-temperature performance of products, etc. Achieve the effects of low production cost, excellent high temperature resistance and low thermal conductivity

Inactive Publication Date: 2016-12-07
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main performance is that the impurity content in the raw material is high, and due to the limitation of the preparation method, the high-temperature properties of the prepared forsterite are unstable, which significantly affects the high-temperature performance of the product, and thus cannot be compatible with erosive media, reducing atmosphere, alkaline dust, etc. Long-term use in high-temperature environment, which limits its application in refractory products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-strength light forsterite refractory material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0036] The first step is to mix 30~40wt% silicon-containing raw materials, 30~40wt% magnesium salt, 1~10wt% zinc-containing raw materials, 1~10wt% iron powder and 1~10wt% boric acid, and press to form ; heat treatment in a reducing atmosphere at 800-1100°C for 3-6 hours, crush, grind, and sieve to obtain material A with a particle size of less than 0.045 mm.

[0037] In the second step, 60~70wt% of the A material, 10~15wt% of the surfactant, 10~15wt% of the thickener and 3~10wt% of the additive are mixed uniformly to obtain a mixture; Mix 30~50wt% water and ball mill to get the slurry.

[0038] The 3rd step, with the described silicon-containing raw material of 10~20wt%, the magnesia fine powder of 20~30wt%, the described zinc-containing raw material of 1~6wt%, the urban sludge of 40~50wt% and 1~6wt% The said s...

Embodiment 2

[0051] A high-strength light forsterite refractory material and a preparation method thereof. Except following material, all the other are with embodiment 1:

[0052] The silicon-containing raw material is fused silica;

[0053] The magnesium salt is magnesium sulfate;

[0054] The zinc-containing raw material is zinc phosphate;

[0055] The reducing atmosphere is a carbon monoxide atmosphere;

[0056] The surfactant is an alkyl glycoside;

[0057] The thickener is modified starch;

[0058] Described additive is white carbon black;

[0059] The magnesia is fused magnesia;

[0060] The neutral atmosphere is an argon atmosphere.

Embodiment 3

[0062] A high-strength light forsterite refractory material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0063] The first step is to mix 40~50wt% silicon-containing raw materials, 20~30wt% magnesium salt, 1~10wt% zinc-containing raw materials, 1~10wt% iron powder and 1~10wt% boric acid, and press to form ; Heat treatment in reducing atmosphere and 900-1200°C for 3-6 hours, crushing, grinding, and sieving to obtain material A with a particle size of less than 0.045mm.

[0064] In the second step, 70~80wt% of the A material, 5~10wt% of the surfactant, 5~10wt% of the thickener and 8~15wt% of the additive are mixed uniformly to obtain a mixture; Mix 40~60wt% water and ball mill to get the slurry.

[0065] The 3rd step, with the described silicon-containing raw material of 20~30wt%, the magnesia fine powder of 10~20wt%, the described zinc-containing raw material of 5~10wt%, the urban sludge of 30~40wt% and 5~10wt% The ...

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Abstract

The invention relates to a high-strength lightweight forsterite fireproof material and a preparation method therefor. The scheme is as follows: the preparation method comprises the steps: firstly, uniformly mixing a siliceous raw material, a magnesium salt, a zinciferous raw material, iron powder and boric acid, carrying out forming, carrying out heat treatment in a reducing atmosphere, and carrying out grinding, thereby obtaining a material A; then, mixing the material A, a surfactant, a thickener, an additive and water, and carrying out ball-milling, thereby obtaining slurry; then, uniformly mixing a siliceous raw material, fine magnesia powder, a zinciferous raw material, municipal sludge and a surfactant, carrying out forming, carrying out heat treatment in a reducing atmosphere, carrying out heat treatment in a neutral atmosphere, and carrying out grinding, so as to obtain a material B and a material C; and finally, uniformly mixing magnesia granules, fine magnesia powder, a siliceous raw material, the material B, the material C, a zinciferous raw material and the slurry, carrying out forming, and carrying out heat treatment, thereby preparing the high-strength lightweight forsterite fireproof material. According to the high-strength lightweight forsterite fireproof material and the preparation method therefor, the source of the raw materials is wide, and the production cost is low; and the prepared product is excellent in high-temperature resistance, high in strength and small in high-temperature coefficient of thermal conductivity and can be used in a long term in high-temperature environments in contact with reducing atmosphere, alkaline dust and the like.

Description

technical field [0001] The invention belongs to the technical field of forsterite refractory materials. It specifically relates to a high-strength light forsterite refractory material and a preparation method thereof. Background technique [0002] Forsterite crystals have excellent characteristics such as high melting point, low thermal conductivity, stable chemical properties, and high corrosion resistance to metal melts and slag. However, natural forsterite not only has high impurity content and large loss on ignition, but even after high-temperature calcination, it still cannot meet the requirements of high-grade refractory products, which seriously affects the production of refractory materials and the promotion of refractory products. [0003] The methods for preparing forsterite in the prior art all have certain deficiencies. The main performance is that the impurity content in the raw material is high, and due to the limitation of the preparation method, the high-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/20C04B35/622C04B35/64C04B35/636C04B35/63
CPCC04B35/20C04B35/622C04B35/6316C04B35/636C04B35/6365C04B35/64C04B35/66C04B2235/3206C04B2235/3418C04B2235/447C04B2235/448C04B2235/60C04B2235/658C04B2235/6582C04B2235/786C04B2235/96C04B2235/9607
Inventor 陈少一刘浩王周福王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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