Light fire resisting brick of iolite-mulbite and preparation process thereby

A technology of mullite and cordierite, which is applied in the field of cordierite-mullite lightweight refractory bricks, can solve the problems not mentioned, achieve the effects of saving processing costs, reducing manufacturing costs, and optimizing product performance

Inactive Publication Date: 2005-01-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent "Production Method of Cordierite Lightweight Aggregate Brick" (Application No.: 95110523 X; Publication No.: CN1121493A) introduced talcum powder, bauxite, burnt gemstone, clay and alumina powder as main raw materials through foaming , molding, drying to prepare lightweight aggregate, and then use ta

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Coal gangue is taken from Datong, Shanxi, and its chemical composition is: Al 2 o 3 36.12Wt.%; SiO 2 45.2Wt.%; MgO 0.3Wt.%; CaO 0.2Wt.%; FeS 2 1.8Wt.%;TiO 2 0.8Wt.%; K 2 O 0.1 Wt.%; Na 2 O 0.08Wt.%; loss on ignition 15.4Wt.%. The chemical composition of magnesite is: MgO 95.2Wt.%; CaO1.5Wt.%; Al 2 o 3 0.2Wt.%; SiO 2 1.2Wt.%; Fe 2 o 3 1.4Wt.%; K 2 O 0.3Wt.%; Na 2 O0.2Wt.%; The present embodiment does not use iron-removing bauxite. When preparing mud, the mixing ratio of the two raw materials: coal gangue 85Wt.%; magnesite 15.0Wt.%, according to the ratio of water / solid = 0.5-0.6, add water into the ball mill for mixing and grinding, and jointly grind to 44μm aperture sieve (325 mesh) sieve residue is less than 2.0Wt.%. Take the mud out of the ball mill and put it into the mud filter machine to filter into mud cake. The moisture content of the mud cake should be controlled between 20.0-30.0Wt.%. The mudcake is then mixed with organic debris such as s...

Embodiment 2

[0045] Coal gangue is taken from Datong, Shanxi, and its chemical composition is: Al 2 o 3 36.12Wt.%; SiO 2 45.2Wt.%; MgO 0.3Wt.%; CaO 0.2Wt.%; FeS 2 1.8Wt.%;TiO 2 0.8Wt.%; K 2 O 0.1Wt.%; Na 2 O 0.08Wt.%; loss on ignition 15.4Wt.%. The chemical composition of magnesite is: MgO 95.2Wt.%; CaO1.5Wt.%; Al 2 o 3 0.2Wt.%; SiO 2 1.2Wt.%; Fe 2 o 3 1.4Wt.%; K 2 O 0.3Wt.%; Na 2 O0.2Wt.%; The chemical composition of the used iron-removing vanadium is: Al 2 o 3 68.2Wt.%; SiO 2 14.8Wt.%; MgO 0.2Wt.%; CaO 0.05Wt.%; FeS 2 0.6Wt.%;TiO 2 0.7Wt.%; K 2 O 0.05Wt.%; Na 2 O 0.02Wt.%; loss on ignition 15.38Wt.%. The mixing ratio of the three raw materials when preparing the mud is: coal gangue 65.88Wt.%; magnesite 15.0Wt.%; bauxite 20.0Wt.%; add water into the ball mill according to the ratio of water / solid = 0.5-0.6 Mix and grind, and grind together until the sieve residue of 44 μm aperture sieve (325 mesh) is less than 2.0Wt.%. Take the mud out of the ball mill and ...

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PUM

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Abstract

The invention is a iolite-mullite light fireproof brick and its preparing method, and its characteristic: using coal gangue 40.0-79.8 Wt.%, magnesia 10.0-30.0Wt.%, and iron-removed bauxite 10.0-30.0 Wt.% as main raw materials, adding in sawdust 0.02-0.2 Wt.%; adding water in water-solid ratio=0.5-0.6 in a ball mill for mixing and milling, and milling up to the screening allowance of a 44 mum-pore size sieve less than 2.0Wt.%; then throwing in a mud press to form mud cake, uniformly mixing the mud cake with organic substances: sawdust, etc, and then making extrudsion forming by a mud extruder, or manually beating or making pour forming. The crude blank is dried and then burned at 1200-14400 deg.C, and then made into iolite and mullite by solid- and liquid- phase reaction. The brick blank is cut and milled to obtain the light fireproof brick with cordierite and mullite as main crystal phase. It uses solid wastes of coal gangue and can save energy sources in burning course by using combustibles in the coal gangue, and at the same time, it is easy maintain a reducing atmosphere in the brick blank, beneficial to optimizing the product properties.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a cordierite-mullite lightweight refractory brick. Background technique [0002] Cordierite is the mineral with the lowest coefficient of thermal expansion among all known silicate minerals, so products with cordierite as the main crystal phase have good resistance to rapid cooling and rapid heating. Lightweight refractory bricks are mostly used for the refractory lining of intermittent kilns. The service life of these lightweight refractory bricks is mainly affected by the material's resistance to rapid cooling and rapid heating. Therefore, cordierite-mullite lightweight refractory bricks with a low thermal expansion coefficient are used in intermittent kilns with frequent heating and cooling, which will make the furnace lining have a long service life. At the same time, the presence of mullite and a small amount of spinel makes this This kind of lightweight refractory brick...

Claims

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Application Information

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IPC IPC(8): C04B33/02C04B33/32C04B35/185C04B35/195C04B35/66
Inventor 倪文王恩徐丽
Owner UNIV OF SCI & TECH BEIJING
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