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Method for preparing magnesia-alumina spinel-containing aluminate cement

A technology of aluminate cement and magnesium aluminum spinel, which is applied in the field of inorganic non-metallic materials, can solve the problems of limited application and high production cost of magnesium aluminum spinel, and achieve strong applicability, reduced production cost and simple preparation process Effect

Inactive Publication Date: 2010-11-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high production cost of magnesium aluminum spinel limits its application.

Method used

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  • Method for preparing magnesia-alumina spinel-containing aluminate cement
  • Method for preparing magnesia-alumina spinel-containing aluminate cement
  • Method for preparing magnesia-alumina spinel-containing aluminate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Lightly burned dolomite and industrial alumina (purity>99.5%) are used as raw materials. Chemical composition of light burned dolomite (see Table 1).

[0021] Step 1, the raw material industrial alumina and light-burned dolomite are respectively subjected to coarse crushing and intermediate crushing in a jaw crusher and a double-roller crusher to obtain granular materials with a particle size of 3 mm;

[0022] Step 2, according to the ratio of alumina:light-burned dolomite weight percentage of 60:40, the granular material is put into a ball mill and co-milled with spherical grinding bodies to obtain a fine powder material smaller than 180 mesh;

[0023] Step 3, adding water with 3% mass of the fine powder material to the fine powder material after co-grinding and mixing, fully stirring, and then carrying out airtight bundling;

[0024] Step 4, put the bundled material into the mold, pound it into shape; after forming, dry it naturally at room temperature;

[0025] Ste...

Embodiment 2

[0028] Lightly burned dolomite and industrial alumina (purity>99.5%) are used as raw materials. Chemical composition of light burned dolomite (see Table 1).

[0029] Step 1, the raw material industrial alumina and light-burned dolomite are respectively subjected to coarse crushing and medium crushing in a jaw crusher and a double-roller crusher to obtain granular materials with a particle size of 5 mm;

[0030] Step 2, according to the ratio of alumina:light-burned dolomite weight percentage of 70:30, the granular material is put into a ball mill and co-milled with spherical grinding bodies to obtain a fine powder material smaller than 180 mesh;

[0031] Step 3, adding water with 5% of the mass of the fine powder material to the fine powder material that has been co-ground and mixed, fully stirring, and then performing airtight bundling;

[0032] Step 4, put the bundled material into the mold, pound it into shape; after forming, dry it naturally at room temperature;

[0033]...

Embodiment 3

[0036] Lightly burned dolomite and industrial alumina (purity>99.5%) are used as raw materials. Chemical composition of light burned dolomite (see Table 1).

[0037] Step 1, the raw material industrial alumina and light-burned dolomite are respectively subjected to coarse crushing and medium crushing in a jaw crusher and a double-roller crusher to obtain granular materials with a particle size of 4mm;

[0038] Step 2, according to the ratio of alumina:light-burned dolomite weight percentage of 65:35, putting the granular material into a ball mill and co-grinding with spherical grinding bodies to obtain a fine powder material smaller than 180 mesh;

[0039] Step 3, adding water with 4% mass of the fine powder material to the fine powder material after co-grinding and mixing, fully stirring, and then carrying out airtight bundling;

[0040] Step 4, put the bundled material into the mold, pound it into shape; after forming, dry it naturally at room temperature;

[0041] Step 5,...

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Abstract

The invention discloses a method for preparing magnesia-alumina spinel-containing aluminate cement, which comprises the following steps of: firstly, crushing raw materials; secondly, grinding the crushed materials; thirdly, mixing the ground materials in proportion and bunching the mixture; fourthly, ramming and molding the material bunch after the bunching is finished; sixthly, placing the molded material into a furnace for heating and sintering; and finally crushing and grinding again the sintered material after the material is cooled to the room temperature to obtain the magnesia-alumina spinel-containing aluminate cement. The novel magnesia-alumina spinel-containing aluminate cement prepared by the method of the invention has relatively higher fire resistance, and as a bonding agent of a ladle castable, remarkably improves the slag resistance of the ladle castable. The method has the advantages of simple process and high applicability, and can be widely applied to a plurality of industries, such as metallurgy, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, in particular to a preparation method of aluminate cement containing magnesium aluminum spinel. technical background [0002] With the development of monolithic refractories, refractory castables continue to become its leading product. Ladle castable is one of the important refractory products. It has many features, enabling more projects to be realized. However, if the bonding agent used in the ladle castable is different, the bonding method and bonding mechanism will be different, and the impact on the performance of the refractory product will also be different. Ladle castables represented by low cement castables occupy an important position in the market competition. Aluminate cement is often used as a binder for ladle castables, and pre-synthesized magnesia-aluminum spinel (MgO·Al 2 o 3 , hereinafter referred to as MA) to improve the thermal shock resistance and...

Claims

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Application Information

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IPC IPC(8): C04B7/32
Inventor 肖国庆石金辉荆桂花
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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