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Method for recycling zirconia ceramic waste

A technology of zirconia ceramics and waste materials, which is applied in the field of recycling zirconia ceramic waste materials, can solve the problems of corrosion resistance, high strength and high hardness, and the difficulty of recycling wear-resistant devices, difficulty in popularization and application, and sharp increase in demand. Low cost, easy implementation, uniform particle size distribution effect

Active Publication Date: 2021-08-24
XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the demand is soaring, a large amount of leftovers and used waste are also produced in the process of preparing zirconia materials and their devices.
Moreover, zirconia devices not only contain a large amount of zirconium, but also valuable elements such as scandium, cerium, and yttrium. come with great difficulty
[0004] For the recovery of zirconia materials and their devices, the existing technology mainly adopts high-temperature roasting, acid-base leaching and other methods to separate and extract useful elements, but this type of process has defects such as large energy consumption, long process, high cost, and low recovery efficiency. Difficult to promote the application

Method used

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  • Method for recycling zirconia ceramic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for recycling zirconia ceramic waste, the steps are as follows:

[0031] Take zirconia ceramic waste and clean it with an ultrasonic cleaner. The ultrasonic time is 30 minutes. The cleaning solution used is an aqueous solution of sodium carbonate with a mass fraction of 12%. rinse off;

[0032] The cleaned zirconia ceramic waste is crushed with a pair of rollers, and rolled continuously for 5 times. When rolling, the distance between the rollers is 1mm, and the rotating speed of the rollers is 120r / min to obtain the crushed material;

[0033] The crushed material is crushed with a jet mill, and the working conditions of the jet mill are: the compressed air pressure of the classifier is 0.7MPa, the frequency of the classifying wheel is 36.5Hz, the frequency of the centrifugal fan is 38.5Hz, and the feed rate of the hopper is 30g / min, get crushed material;

[0034] The pulverized material is mixed with pure water to obtain a mixed slurry with a solid content o...

Embodiment 2

[0038] A method for recycling zirconia ceramic waste, the steps are as follows:

[0039] Take zirconia ceramic waste and clean it with an ultrasonic cleaner. The ultrasonic time is 30 minutes. The cleaning solution used is an aqueous solution of sodium carbonate with a mass fraction of 10%. rinse off;

[0040] The cleaned zirconia ceramic waste is crushed with a pair of rollers, and rolled continuously for 5 times. When rolling, the distance between the rollers is 1mm, and the rotating speed of the rollers is 120r / min to obtain the crushed material;

[0041] The crushed material is crushed with a jet mill, and the working conditions of the jet mill are: the compressed air pressure of the classifier is 0.8MPa, the frequency of the classifying wheel is 38.5Hz, the frequency of the centrifugal fan is 40.5Hz, and the feed rate of the hopper is 35g / min, get crushed material;

[0042] The pulverized material is mixed with pure water to obtain a mixed slurry with a solid content o...

Embodiment 3

[0046] A method for recycling zirconia ceramic waste, the steps are as follows:

[0047] Take zirconia ceramic waste and clean it with an ultrasonic cleaner. The ultrasonic time is 30 minutes. The cleaning solution used is an aqueous solution of sodium carbonate with a mass fraction of 10%. rinse off;

[0048] The cleaned zirconia ceramic waste is crushed with a pair of rollers, and rolled continuously for 5 times. When rolling, the distance between the rollers is 1mm, and the rotating speed of the rollers is 120r / min to obtain the crushed material;

[0049] The crushed material is crushed with a jet mill, and the working conditions of the jet mill are: the compressed air pressure of the classifier is 0.9MPa, the frequency of the classification wheel is 41.5Hz, the frequency of the centrifugal fan is 43.5Hz, and the feed rate of the hopper is 35g / min, get crushed material;

[0050] The pulverized material is mixed with pure water to obtain a mixed slurry with a solid conten...

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Abstract

The invention discloses a method for recycling zirconia ceramic waste. The method comprises the following steps: cleaning the zirconia ceramic waste; crushing the cleaned zirconia ceramic waste by using a double-roller machine to obtain a crushed material; crushing the crushed material by using a jet mill to obtain a crushed material; mixing the crushed material with water to obtain mixed slurry with the solid content of 15-30%, grinding the mixed slurry by using a grinding machine, conducting standing after grinding, and separating clear liquid to obtain slurry with the solid content of 30-45%; carrying out spray drying on the slurry to obtain zirconia ceramic recovery powder; and pressing and sintering the zirconium oxide ceramic recovery powder to obtain a regenerated zirconium oxide ceramic device. According to the method, the zirconium oxide ceramic waste is recycled through a pure physical method, the recycled powder with uniform particle size distribution is obtained, the zirconium oxide ceramic device with excellent performance is prepared through pressing and sintering molding, the recycling process is low in energy consumption, low in cost, short in technological process, easy to implement and high in efficiency, and regeneration and recycling of zirconium oxide are achieved.

Description

technical field [0001] The invention relates to the technical field of recycling inorganic non-metallic materials, in particular to a method for recycling zirconia ceramic waste. Background technique [0002] Zirconia (ZrO 2 ) is an inorganic non-metallic material with high temperature resistance, corrosion resistance, wear resistance and excellent electrical conductivity. Since the mid-1970s, developed countries in the world have invested heavily in research and development of zirconia series products, and the application of zirconia The field has expanded to structural materials and functional materials. At the same time, zirconia is also one of the high-performance new materials that are encouraged by the national industrial policy, and is currently being widely used in various industries. [0003] With the rapid development of the global economy, the amount of zirconia materials and their devices has also increased. At present, zirconia is widely used in ceramic heatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/626
CPCC04B35/48C04B35/62204C04B35/62605C04B35/6261C04B2235/77C04B2235/96
Inventor 王云王权许伟瑜曾嘉豪朱刘
Owner XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD