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Mullite-shrunk glass complex phase material and preparation method thereof

A high-silica glass and mullite technology, applied in the field of mullite-high-silica glass composite material and its preparation, can solve the problem of high raw material price, achieve low expansion coefficient, reduce cost, widen social and economic effect of value

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the raw material price of above-mentioned method is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A mullite-high silica glass composite phase material and its preparation method, first, 60-65wt% fused sub-white corundum dedusting powder, 5-6wt% silicon micropowder, 10-13wt% quartz powder and 20-20wt% 21wt% quartz glass powder is mixed and shaped after stirring; then heated to 1300-1400°C at a heating rate of 2-3°C / min in an atmosphere furnace under an air atmosphere, kept for 2-3 hours, and finally cooled to room temperature naturally .

[0018] Among them: the chemical composition of fused sub-white corundum dust removal powder is: Al 2 o 3 42.18%, SiO 2 18.76%, K 2 O is 12.82%, MgO is 1.22%, Na 2 O is 1.88%, TiO 2 2.10%, Fe 2 o 3 2.72% and 18.32% for others.

[0019] According to the X-ray diffraction analysis of the mullite-high-silica glass composite material (mullite) prepared in Example 1, the main phases are mullite phase and glass phase. The bulk density is 1.65g / cm 3 ~1.70g / cm 3 , The apparent porosity is 35% to 37%.

Embodiment 2

[0021] A mullite-high silica glass composite material and a preparation method thereof, comprising mixing 65-70wt% of fused brown corundum dust removal powder, 10-13wt% of quartz powder and 20-22wt% of quartz glass powder, and Stir and shape; then heat up to 1400-1500°C at a rate of 3-4°C / min in an electric arc furnace under an air atmosphere, keep warm for 3-4 hours, and finally cool naturally to room temperature.

[0022] Among them: the chemical composition of fused brown corundum dust removal powder is: Al 2 o 3 41.36%, SiO 2 22.13%, K 2 O is 12.82%, MgO is 2.26%, Na 2 O is 2.28%, TiO 2 2.11%, Fe 2 o 3 2.72% and others 14.32%.

[0023] According to the X-ray diffraction analysis of the mullite-high silica glass composite material (Molacate) prepared in Example 2, the main phases are mullite phase and glass phase. The bulk density is 1.72g / cm 3 ~1.90g / cm 3 , The apparent porosity is 22% to 32%.

Embodiment 3

[0025] A mullite-high silica glass composite material and a preparation method thereof, comprising mixing 70-75wt% fused sub-white corundum dedusting powder, 15-16wt% silicon micropowder and 10-14wt% quartz glass powder, After being stirred, it is formed. After forming, it is heated to 1500-1600°C in an induction furnace at a rate of 4-5°C / min in an air atmosphere, kept for 4-5 hours, and finally cooled to room temperature naturally.

[0026] Among them: the chemical composition of fused sub-white corundum dust removal powder is: Al 2 o 3 31.78%, SiO 2 20.16%, K 2 O is 13.82%, MgO is 3.02%, Na 2 O is 2.88%, TiO 2 3.10%, Fe 2 o 3 3.42% and others 21.82%.

[0027] According to the X-ray diffraction analysis of the mullite-high silica glass composite material (Molacate) prepared in Example 3, the main phases are mullite phase and glass phase. The bulk density is 1.91g / cm 3 ~2.12g / cm 3 , The apparent porosity is 2% to 18%.

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Abstract

The invention relates to a mullite-silica-rich glass material (Mullica) and a preparation method thereof. The adopted technical proposal is as follows: firstly, 60 to 100 weight percent of fused corundum dusting powder and 0 to 40 weight percent of fine SiO2 powder are mixed, stirred, and then molded; and then the mixture is heated to between 1,300 and 1,600 DEG C at a temperature increase rate of between 2 and 5 DEG C / min in a reaction furnace under air atmosphere, the thermal insulation is performed for 2 to 8 hours, and then the mixture is naturally cooled. A raw material used by the mullite-silica-rich glass material is the fused corundum dusting powder, alumina and silica in the fused corundum dusting powder are utilized as compositions of synthetic mullite, and impurities such as potassium oxide can form a glass phase. The method uses waste as the raw material to synthesize the mullite-silica-rich glass material (Mullica), which can change wastes into valuables, reduce environmental pollution and production cost. At the same time, the mullite-silica-rich glass material (Mullica) does not contain cristobalite and corundum, and has the characteristics of high refractability, low expansion coefficient, wear resistance, and good thermal shock resistance.

Description

technical field [0001] The invention relates to the technical field of composite refractory production. In particular, it relates to a mullite-high silica glass composite material (Molacate) and a preparation method thereof. Background technique [0002] Fused corundum dust removal powder is a solid waste generated during the production of fused corundum. The chemical composition of fused corundum dust removal powder is mainly Al 2 o 3 , SiO 2 , K 2 O, MgO, Fe 2 o 3 , Na 2 Mainly O and CaO, etc., in general, Al 2 o 3 20~56wt%, SiO 2 10~50wt%, K 2 O is 0.3 to 20 wt%. The proportion of its chemical composition varies slightly with the raw materials and operating conditions of each manufacturer. [0003] Fused corundum dust removal powder is usually discarded as garbage, which not only pollutes the environment, but also requires a large amount of disposal sites and high processing costs. With the development of industrial processes, its production volume is also i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10C04B35/185
Inventor 李远兵祝泉代旭娟智利彪赵雷牛琛雁李亚伟金胜利李淑静桑绍柏
Owner WUHAN UNIV OF SCI & TECH
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