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Method for producing alumina mullite homogenizing material

A technology for mullite and homogenizing material, which is applied in the field of producing bauxite mullite homogenizing material, can solve the problems of high price of rare earth oxides, difficult to obtain, human health and environmental hazards, etc., and is beneficial to resources and the environment. Long-term development, easy operation, avoid spalling effect

Active Publication Date: 2013-04-17
山西高科耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth oxides are expensive, difficult to obtain, and will cause certain harm to human health and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using bauxite raw ore with an aluminum content of 48% to 60% and coal gangue with an aluminum content of 33% to 38% as raw materials to produce bauxite-mullite homogenized material, the weight percentage of each raw material is:

[0029] Bauxite: 75%, coal gangue 25%;

[0030] Aluminum oxide powder: 4% (accounting for the percentage of total weight of bauxite and coal gangue);

[0031] Polyvinyl alcohol: 0.2% (accounting for the percentage of total weight of bauxite and coal gangue).

[0032] The method for producing bauxite-mullite homogenized material with above-mentioned material comprises the following steps:

[0033] (1) Break the block into small pieces with a particle size of less than 10mm.

[0034] (2) After weighing and preparing the crushed small pieces and aluminum oxide powder, add them to the ball mill, and add water and polyvinyl alcohol accounting for 30-40% of the total weight of the material to grind; grind to 300- Discharge after 500 meshes.

[00...

Embodiment 2

[0040] Using bauxite raw ore with an aluminum content of 60% to 73% and coal gangue with an aluminum content of 33% to 38% as raw materials to produce bauxite-mullite homogenized material, the weight percentage of each raw material is:

[0041] Bauxite: 63%, coal gangue 37%;

[0042] 2.5% activated alumina powder (accounting for the percentage of bauxite and coal gangue total weight);

[0043] Polyvinyl alcohol: 0.2% (accounting for the percentage of total weight of bauxite and coal gangue).

[0044] The method for producing bauxite-mullite homogenized material with above-mentioned material comprises the following steps:

[0045] (1) Break the large pieces into small pieces with a particle size of less than 10mm.

[0046] (2) Weigh the crushed small pieces of bauxite, coal gangue and activated alumina powder according to weight percentage and add them to the ball mill, and add water and polyvinyl alcohol accounting for 30-40% of the total weight of the materials for grinding...

Embodiment 3

[0052] Using bauxite raw ore with an aluminum content of 60% to 73% and kaolin with an aluminum content of 35% to 37% as raw materials to produce bauxite-mullite homogenized material, the weight percentage of each raw material is:

[0053] Bauxite: 72%, coal gangue 28%;

[0054] 3% active alumina powder (accounting for the percentage of bauxite and kaolin total weight);

[0055] 0.5% silica fume (accounting for the percentage of bauxite and kaolin total weight);

[0056] Polyvinyl alcohol: 0.2% (accounting for the percentage of total weight of bauxite and kaolin).

[0057] The method for producing bauxite-mullite homogenized material with above-mentioned material comprises the following steps:

[0058] (1) Break large pieces of material into small pieces with a diameter of less than 10mm.

[0059](2) join in the ball mill after weighing and preparing the crushed small fragment material, kaolin, and activated alumina powder by weight percentage, and add water and polyvinyl a...

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Abstract

The invention discloses a method for producing an alumina homogenizing material, which belongs to the technical field of ceramics and refractory materials. The preparation method comprises the following steps of: with middle and low grade bauxite, gangue or kaolin as raw materials, assistantly adding siliceous dust or aluminum oxide powder; and breaking, grinding by a wet method, deironing, atomizing for drying, moulding, burning, and the like to form the alumina mullite homogenizing material with a main crystalline phase of mullite. The invention not only greatly improves the utilization ratio of bauxite resources but also can utilize part of gangue to produce a high-grade refractory raw material and has obvious social and economic benefits; and the preparation method has the characteristics of simple process, easy operation, lower cost, high mouldability, difficult bursting after conveyed into a kiln, and the like.

Description

technical field [0001] The invention belongs to the technical field of ceramics and refractory materials, and relates to a method for producing bauxite-mullite homogenized material. Background technique [0002] The stability of chemical composition and mineral composition is a prerequisite for the manufacture of high-quality refractory products, so the same grade of Al in high-alumina bauxite clinker is required 2 o 3 The fluctuation of the content is controlled within a small range. Although my country's bauxite reserves are abundant, most bauxite processing enterprises have small scale, simple processing, single variety, poor product stability, high mine resource abandonment rate, high energy consumption, and serious pollution in recent years. The resource utilization rate is low and the contradiction between supply and demand of high aluminum resources appears. About 65% of refractories in my country belong to Al 2 o 3 -SiO 2 Therefore, it pays attention to the rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 高峰王虹
Owner 山西高科耐火材料股份有限公司