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A kind of magnesia refractory material for high temperature kiln and its preparation method

A refractory material and kiln technology, applied in the field of magnesia refractory materials for high-temperature kiln and its preparation, can solve the problems of poor thermal shock resistance and permeability resistance, and achieve excellent corrosion resistance, excellent erosion resistance, The effect of low production cost

Inactive Publication Date: 2018-11-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesia refractories prepared by the existing technical solutions also have disadvantages such as thermal shock resistance and poor penetration resistance, which are the main obstacles to the wider application of magnesia refractories as high-temperature kiln linings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A magnesia refractory material for a high-temperature kiln and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0037] Step 1. Mix 30-40wt% aluminum-containing raw materials, 30-40wt% rare-earth-containing raw materials, 1-10wt% surfactants, 1-10wt% additives and 1-10wt% aluminum-containing solution, and ball mill , dried at 80-100°C for 12-24 hours, pressed at 50-100MPa; then heat-treated at 800-1100°C for 3-6 hours, crushed, ground, and sieved to obtain a particle size of less than 0.045mm A material.

[0038] Step 2. Mix 30-40wt% of the A material, 1-10wt% of the surfactant, 1-10wt% of the additive and 50-60wt% of the aluminum-containing solution, and ball mill, that is Get a mixed slurry.

[0039] Step 3, 20~30wt% of the aluminum-containing raw material, 1~10wt% of the zinc-containing raw material, 30~40wt% of the described rare earth-containing raw material, 1~10wt% of the titanium-containing raw mate...

Embodiment 2

[0054] A magnesia refractory material for a high-temperature kiln and a preparation method thereof. Present embodiment except following material, all the other are with embodiment 1:

[0055] The aluminum-containing raw material is aluminum hydroxide;

[0056] The rare earth-containing raw material is neodymium hydroxide;

[0057] The zinc-containing raw material is zinc sulfate;

[0058] The titanium-containing raw material is titanium dioxide;

[0059] Described tensio-active agent is methyl acrylate;

[0060] The additive is carboxymethyl cellulose;

[0061] The aluminum-containing solution is an aqueous solution of polyaluminum chloride;

[0062] The reducing atmosphere is a carbon monoxide atmosphere;

[0063] The magnesia is sintered magnesia;

[0064] The magnesium salt is magnesium carbonate.

[0065] The magnesia refractory material for high-temperature kiln prepared in this embodiment: the compressive strength is greater than 100 MPa; the infrared reflectivit...

Embodiment 3

[0067] A magnesia refractory material for a high-temperature kiln and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0068] Step 1. Mix 40~50wt% of aluminum-containing raw materials, 20~30wt% of rare earth-containing raw materials, 1~10wt% of surfactants, 1~10wt% of additives and 1~10wt% of aluminum-containing solutions, and ball mill , dried at 90-110°C for 12-24 hours, pressed at 50-100MPa; then heat-treated at 1000-1300°C for 3-6 hours, crushed, ground, and sieved to obtain a particle size of less than 0.045mm A material.

[0069] Step 2, mix 40~50wt% of the A material, 1~10wt% of the surfactant, 1~10wt% of the additive and 40~50wt% of the aluminum-containing solution, and ball mill, that is Get a mixed slurry.

[0070] Step 3, 30~40wt% of the aluminum-containing raw material, 1~10wt% of the zinc-containing raw material, 20~30wt% of the described rare earth-containing raw material, 1~10wt% of the titanium-co...

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Abstract

The invention discloses a magnesian refractory material for a high-temperature kiln and a preparation method of the magnesian refractory material. The preparation method comprises the following steps: uniformly mixing an aluminum-containing raw material, a rare earth-containing raw material, a surfactant, an additive and an aluminum-containing solution, and carrying out ball milling, drying, foaming, thermal processing, grinding and sieving, so as to obtain a material A; uniformly mixing the material A, the surfactant, the additive and the aluminum-containing solution, and carrying out ball milling, so as to obtain mixed slurry; uniformly mixing the aluminum-containing raw material, a zinc-containing raw material, the rare earth-containing raw material, a titanium-containing raw material and the material A, carrying out ball milling and forming, and carrying out thermal treatment in a reducing atmosphere; carrying out vacuum impregnation on the mixed slurry in the aluminum-containing solution, and carrying out thermal treatment, grinding and sieving, so as to obtain a material B and a material C; uniformly mixing magnesia, the material A, the material B, the material C, the zinc-containing raw material, the magnesia and the mixed slurry, and forming; and carrying out thermal treatment at 800-1200 DEG C and 1400-1700 DEG C, respectively so as to obtain the magnesian refractory material for the high-temperature kiln. The magnesian refractory material has the beneficial effects of low production cost, high compression strength, excellent high temperature resistance and erosion resistance and high infrared reflectivity.

Description

technical field [0001] The invention belongs to the technical field of magnesia refractories. In particular, it relates to a magnesia refractory material for a high-temperature kiln and a preparation method thereof. Background technique [0002] Magnesia refractories are important basic refractories and indispensable lining materials for high-temperature kilns. With the increasing development of steel, cement, glass, chemical and other industries, countries around the world have made great progress in the research and development of new varieties of magnesia refractory materials, improvement and improvement of product quality, prolongation of service life and reduction of refractory consumption. [0003] Magnesia refractories have high refractoriness and good resistance to alkaline slag and iron slag. In the metallurgical industry, they are mainly used in open hearth furnaces, electric furnaces, oxidation converters, cement kilns, non-ferrous metal smelting furnaces and bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/0435C04B35/622C04B2235/3206C04B2235/3217C04B2235/3218C04B2235/3224C04B2235/3232C04B2235/3284C04B2235/96
Inventor 王周福熊鑫刘江波刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH