Method for producing alumina homogenization material

A production method and homogenized material technology, applied in the production field of bauxite homogenized material, can solve problems such as low refractoriness, increased firing temperature, and reduced reactivity, so as to improve high temperature corrosion resistance and refractoriness, The components are uniform and dense, and the specific surface area is increased

Active Publication Date: 2008-02-13
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the homogenized material contains the same Al 2 o 3 The cost of raw ore calcined materials is high. If it is used as aggregate instead of ordinary bauxite clinker, the product cost will be greatly increased. Therefore, the production and application of homogenized materials in China develop slowly.
In the Chinese patent document whose notification number is CN1072623C, a kind of production method of homogenized material with relatively low production cost is disclosed. Screening, grinding, molding, drying, firing and other steps to obtain finished corundum, the advantage is that the indicators of the produced product reach the level of fused corundum, and the production cost is less than half of that of the electric furnace melting method. High temperature (1550-1580°C), long total firing time (140-150 hours), low temperature corrosion resistance and low refractoriness of fired products
The high firing temperature and long total firing time are due to the fact that dry grinding is used in the molding process, and the water distribution is uneven during the process of adding water and stirring, which easily forms particle agglomeration and reduces the specific surface area of ​​the particles, thereby reducing the reactivity and causing the firing temperature to rise. High and total firing time is long; high temperature corrosion resistance and low refractoriness are due to high iron content in raw materials, and high iron content has adverse effects on high temperature corrosion resistance and refractoriness of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for producing the bauxite homogenized material from the loose bauxite raw ore with an aluminum content of 76% comprises the following steps:

[0028] a. Crushing, batching, grinding: the raw material is crushed to a block diameter of 10mm, and after batching with calcium lignosulfonate and water as a binder with a quality of 0.2% of the mass of bauxite, add in a wet ball mill, wherein the The quality of the water is 1.2 times of the quality of the bauxite. According to the mineral hardness and the particle size analysis of the particles in the mud, the slurry is discharged once every 30 minutes. After grinding, the particle size of the mud particles is 180 mesh, and the A material is obtained;

[0029] b. Iron removal: remove iron from material A in the slurry tank, and use a wet magnetic iron remover with a magnetic strength of 12,000 gauss to remove iron from material A to obtain material B;

[0030] c. Filtration: Inhale material B into the mud filter mach...

Embodiment 2

[0036] The method for producing bauxite homogenized material with an aluminum content of 78% loose bauxite raw ore as raw material comprises the following steps:

[0037] a. crushing, batching, grinding: the raw material is crushed to a block diameter of 2 mm, and after batching with calcium lignosulfonate and water as a binding agent with a quality of 0.6% of the bauxite quality, add in a wet ball mill, wherein the The quality of the water is twice the quality of the bauxite. According to the mineral hardness and the particle size analysis of the particles in the mud, the slurry is discharged once every 60 minutes. After grinding, the particle size of the mud particles is 320 mesh, and the material A is obtained;

[0038] b. Iron removal: remove iron from material A in the slurry tank, and use a wet magnetic iron remover with a magnetic strength of 10,000 gauss to remove iron from material A to obtain material B;

[0039] c. Filtration: Inhale material B into the mud filter m...

Embodiment 3

[0044] The method for producing bauxite homogenized material with an aluminum content of 79% loose bauxite raw ore as raw material comprises the following steps:

[0045] a. crushing, batching, grinding: the raw material is crushed to a block diameter of 5 mm, and after batching with calcium lignosulfonate and water as a binding agent with a quality of 0.4% of the bauxite quality, add in a wet ball mill, wherein the The quality of the water is 3 times that of the bauxite. According to the mineral hardness and the particle size analysis of the particles in the slurry, the slurry is discharged once every 40 minutes. After grinding, the particle size of the slurry is 200 mesh, and the material A is obtained;

[0046]b. Iron removal: remove iron from material A in the slurry tank, and use a wet magnetic iron remover with a magnetic strength of 10,000 gauss to remove iron from material A to obtain material B;

[0047] c. Filtration: Inhale material B into the mud filter machine wit...

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Abstract

The present invention discloses a preparation method for bauxite material; which uses the aluminium bauxite mineral with loose structure and incapable of baking directly, and is formed through the following steps including matching, grilling, de-iron, filtering, molding and drying and baking. The main crystal phase of the bauxite material is Alpha- Al2O3, whose section is caesious with compact texture and inerratic crystal grain growth; most of the material is more than 15um; each physical index reaches or even exceeds the bauxite material produced in domestic; compared with the existing technology, the material has the advantages of lower baking temperature and shorter baking time and so on.

Description

technical field [0001] The invention relates to a production method of bauxite homogenizing material, in particular to a method for producing bauxite homogenizing material by using high-alumina bauxite raw ore with a loose structure that cannot be directly sintered as a raw material. Background technique [0002] Bauxite homogenized material is a refractory raw material produced from natural raw bauxite through homogenization, molding, calcination and other processes. Compared with raw ore calcined material, bauxite homogenized material has uniform and stable structure, performance and quality. advantage. However, because the homogenized material contains the same Al 2 o 3 The cost of raw ore calcined materials is high. If it is used as aggregate instead of ordinary bauxite clinker, the product cost will be greatly increased. Therefore, the production and application of homogenized materials in China develop slowly. In the Chinese patent document whose notification number...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 刘百宽张冀贺中央李彩霞王锋刚孙荣海
Owner PUYANG REFRACTORIES GRP CO LTD
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