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Zirconia-mullite-containing material based on kyanite tailings and preparation method of zirconia-mullite-containing material

A technology of kyanite tailings and zirconium mullite, which is applied in the field of zirconium-containing mullite materials and its preparation, can solve the problems of no further research on performance, unfavorable large-scale industrial production, and complicated production process of glass beads. , to achieve the effects of small thermal expansion, comprehensive utilization of resources, and increased toughness

Inactive Publication Date: 2019-11-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Kyanite tailings are solid wastes discharged during the beneficiation process of kyanite ore. Due to the large amount of waste discharge, if they are discharged randomly, it will not only cause ecological damage and environmental pollution such as encroaching on a large area of ​​cultivated land and silting river courses, but also cause a serious waste of resources
[0003] At present, there are technologies for the reuse of kyanite tailings, such as "a high-strength heat-resistant glass bead for reflective film and its preparation method" (CN 201510390440.7), although a small amount of kyanite tailings is used, but due to The production process of glass beads is complex and costly, which is not conducive to large-scale industrial production; another example is "mullite lightweight heat-insulating brick based on kyanite tailings and its preparation method" (CN201410132749.1), this technology incorporates a large number of Kyanite tailings, to a certain extent, solve the problem of utilization of kyanite tailings, but the addition of kyanite tailings in this technology is relatively high, and it is prone to cracking
[0004] And in the technology of preparing zirconium-containing mullite material, such as "zirconia mullite raw material and plate brick" (CN 10192558A), the zirconia mullite composite material prepared by this method is largely due to the direct addition of zirconia. Another example is "Preparation method of zirconia-mullite composite material" (CN 101560098 A), because zircon is added therein, the production cost is increased, and its performance is not further explored

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A zirconium-containing mullite material based on kyanite tailings and a preparation method thereof. The preparation method described in this embodiment is:

[0030] First use 78-80wt% kyanite tailings particles, 20-22wt% α-alumina micropowder, 0.4-0.6wt% beryllium oxide as raw materials, add the raw materials into the ball mill, and then add The raw material is 300-400wt% of water, ball milled for 4-6 hours to obtain a slurry; dry the water at 80-100°C, pulverize, and grind to obtain a fine powder; add the powder to the fine powder 3-5wt% polyvinyl alcohol solution, stirred evenly, trapped for 20-24 hours; then pressed and formed, dried at 80-100°C for 14-16 hours; then kept at 1200-1300°C for 2-3 hours to obtain Zirconium-containing mullite material.

[0031] The zirconium-containing mullite material based on kyanite tailings prepared in Example 1 passed the inspection and was put into trial use. After roasting, the rate of change of firing line of zirconium-contain...

Embodiment 2

[0033] A zirconium-containing mullite material based on kyanite tailings and a preparation method thereof. The preparation method described in this embodiment is:

[0034] First use 76-78wt% of kyanite tailings particles, 22-24wt% of α-alumina micropowder, and 0.4-0.6wt% of beryllium oxide as raw materials, add the raw materials into the ball mill, and then add The raw material is 300-400wt% of water, ball milled for 4-6 hours to obtain a slurry; dry the water at 80-100°C, pulverize, and grind to obtain a fine powder; add the powder to the fine powder 3-5wt% polyvinyl alcohol solution, stirred evenly, trapped for 20-24 hours; then pressed and molded, dried at 80-100°C for 16-18 hours; then kept at 1300-1400°C for 3-4 hours to obtain Zirconium-containing mullite material.

[0035] The zirconium-containing mullite material based on kyanite tailings prepared in Example 1 passed the inspection and was put into trial use. After roasting, the rate of change of firing line of zirc...

Embodiment 3

[0037] A zirconium-containing mullite material based on kyanite tailings and a preparation method thereof. The preparation method described in this embodiment is:

[0038] First use 74-76wt% kyanite tailings particles, 24-26wt% α-alumina micropowder, 0.6-0.8wt% beryllium oxide as raw materials, add the raw materials into the ball mill, and then add The raw material is 300-400wt% of water, ball milled for 4-6 hours to obtain a slurry; dry the water at 80-100°C, pulverize, and grind to obtain a fine powder; add the powder to the fine powder 3-5wt% polyvinyl alcohol solution, stir evenly, trap the material for 20-24 hours; then press to form, dry at 80-100°C for 18-20 hours; then keep warm at 1300-1400°C for 4-5 hours to obtain Zirconium-containing mullite material.

[0039]The zirconium-containing mullite material based on kyanite tailings prepared in Example 1 passed the inspection and was put into trial use. After roasting, the rate of change of firing line of zirconium-con...

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Abstract

The invention particularly relates to a preparation method of zirconia-mullite-containing material based on kyanite tailings. According to the technical scheme, the preparation method comprises the steps that 70-80wt% of kyanite tailing particles, 22-32wt% of alpha-alumina micro powder and 0.4-0.8wt% of beryllium oxide are taken as raw materials, the raw materials are added into a ball mill, thenwater with the weight being 300-400wt% of that of the raw materials is added into the ball mill, ball milling is conducted for 4-6 h, and slurry is obtained; the slurry is dried under the condition of80-120 DEG C, crushed and levigated to obtain fine powder; a polyvinyl alcohol solution with the weight being 3-5wt% of that of the fine powder is added into the fine powder, even stirring is conducted, material ageing is conducted for 20-24 h; then compression moulding is conducted, and drying is conducted under the condition of 80-140 DEG C for 14-24 h; and heat preservation is conducted underthe condition of the oxidizing atmosphere and the temperature of 1200-1600 DEG C for 2-5 h, and thus the zirconia-mullite-containing material based on the kyanite tailings is prepared. The preparationmethod has the characteristics that the cost is low, technology is simple, and resources can be comprehensively utilized, and the prepared product is good in thermal shock performance.

Description

technical field [0001] The invention belongs to the technical field of zirconium-containing mullite materials. It specifically relates to a zirconium-containing mullite material based on kyanite tailings and a preparation method thereof. Background technique [0002] Kyanite tailings are solid wastes discharged during the beneficiation process of kyanite ore. Due to the large amount of waste discharge, if they are discharged randomly, it will not only cause ecological damage and environmental pollution such as encroaching on a large area of ​​cultivated land and silting river courses, but also cause A serious waste of resources. [0003] At present, there are technologies for the reuse of kyanite tailings, such as "a high-strength heat-resistant glass bead for reflective film and its preparation method" (CN 201510390440.7), although a small amount of kyanite tailings is used, but due to The production process of glass beads is complex and costly, which is not conducive to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/622C04B35/66C04B38/00
CPCC04B35/185C04B35/62204C04B35/66C04B38/00C04B2235/3205C04B2235/3217C04B2235/3248C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9615C04B38/0074C04B38/0067
Inventor 李淑静王海路李远兵向若飞
Owner WUHAN UNIV OF SCI & TECH
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