Method for producing sintering brown fused alumina

A brown fused alumina and raw ore technology, applied in the field of refractory material production, can solve the problems of low production efficiency and output, and achieve the effects of low cost, regular grain development, and convenient manual and mechanical transportation

Active Publication Date: 2008-09-10
PUYANG REFRACTORIES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bauxite homogenized material produced by it is lower grade than sintered corundum, which can only be used to produce lower grade refractory materials
In addition, because it also uses calcium lignosulfonate as a binder, it can only be fired in a tunnel kiln or a downdraft kiln, which also has the disadvantages of low production efficiency and output

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The method for producing sintered brown corundum by using loose bauxite raw ore with an aluminum content of 78.12% as raw material comprises the following steps:

[0063] a. crushing, batching, grinding: the raw material is crushed to less than 10 mm in block diameter, and 1.5% boric acid and 1.5% sodium carboxymethyl cellulose as a binding agent, 10% 320-mesh industrial alumina as a raw material And after water batching, add in the wet method ball mill, wherein the quality of said water is 1.2 times of described other materials total mass quality, and the amount of described boric acid, sodium carboxymethyl cellulose and industrial aluminum oxide is all raw with bauxite Based on the quality of the ore. According to the mineral hardness and the particle size analysis of the particles in the mud, the slurry is discharged every 40 minutes. After grinding, the particle size of the mud particles is 200 mesh, and the sieve residue is less than 5%, that is, the A material is ...

Embodiment 2

[0071] The method for producing sintered brown corundum by using loose bauxite raw ore with an aluminum content of 79.67% as raw material comprises the following steps:

[0072] a. Crushing, batching, and grinding: crush the raw materials to a block diameter of 10 mm or less, and combine them with 2% boric acid and 2% sodium carboxymethyl cellulose as a binder, and 20% of 320 mesh calcined alumina as raw materials After powder and water batching, add in the wet method ball mill, wherein the quality of described water is 2 times of described other material total mass quality, the amount of described boric acid, sodium carboxymethyl cellulose and industrial aluminum oxide is all based on the amount of aluminum alum The quality of native ore is used as the basis for calculation. According to the mineral hardness and the particle size analysis of the particles in the mud, the slurry is discharged every 50 minutes. After grinding, the particle size of the mud particles is 200 mesh,...

Embodiment 3

[0079] The method for producing sintered brown corundum by using loose bauxite raw ore with an aluminum content of 80.10% as raw material comprises the following steps:

[0080] a. crushing, batching, grinding: the raw material is crushed to less than 10 mm in block diameter, and 3% boric acid and 3% sodium carboxymethyl cellulose as a binding agent, 320 mesh industrial alumina as a raw material of 35% And after water batching, add in the wet method ball mill, wherein the quality of said water is 1.2 times of described other materials total mass quality, and the amount of described boric acid, sodium carboxymethyl cellulose and industrial aluminum oxide is all raw with bauxite Based on the quality of the ore. According to the mineral hardness and the particle size analysis of the particles in the mud, the slurry is discharged every 60 minutes. After grinding, the particle size of the mud particles is 200 mesh, and the sieve residue is less than 5%, that is, the A material is o...

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Abstract

The invention discloses a method used to manufacture sintering brown alumina. The sintering brown alumina adopts high-alumina bauxite raw ore with a loose structure and aluminum oxide as raw materials and is made through steps such as material proportioning, grinding, forming, drying and burning. Compared with the prior fused brown alumina, the sintering brown alumina has equivalent aluminum content and excellent thermal shock stability, and the cost of the sintering brown alumina is only 37 percent that of the fused brown alumina; moreover, the main crystal phase of the sintering brown alumina is Alpha-Al2O3 and the section of the sintering brown alumina is black; meanwhile, the sintering brown alumina, which has compact texture and regular crystal grain development with most crystal grain more than 10 micron, is a top quality fireproof raw material.

Description

technical field [0001] The invention relates to a production method of sintered corundum, in particular to a production method of sintered brown corundum, which belongs to the field of refractory material production. Background technique [0002] At present, the medium and high-grade aluminum raw materials commonly used in the refractory industry mainly include raw ore calcined materials and electric melting materials. Electric melting materials are produced by electric melting method, and the cost of electricity is very high. Reasons, and the low-cost raw ore calcined material produced by the raw ore sintering method cannot replace the use requirements of fused brown corundum in related products due to reasons such as low alumina content, uneven composition, and relatively unstable properties. [0003] For example, the Chinese patent literature with the notification number CN1072623C discloses a production method of sintered corundum. It uses high-alumina bauxite as a raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10
Inventor 刘百宽张翼李彩霞冯润棠王锋刚贺中央
Owner PUYANG REFRACTORIES GRP CO LTD
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