Method for preparing zirconium oxide ceramic by recycling zirconium oxide ceramic grinding wastes

A zirconia ceramics, grinding processing technology, applied in the field of structural ceramics, can solve problems such as waste of resources, stacking or impact on the surrounding environment of landfill sites, and achieve the effects of saving resources, creating economic value, and simple and easy process methods

Active Publication Date: 2012-07-04
GANZHOU KOIN STRUCTURE CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually as harmless industrial waste, simple disposal methods such as landfill are adopted, which not only wastes resources, but also has a certain impact on the surrounding environment of the stacking or landfill site.

Method used

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  • Method for preparing zirconium oxide ceramic by recycling zirconium oxide ceramic grinding wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Pass the collected yttrium oxide zirconium ceramic grinding waste slurry through a 100-mesh sieve, take the slurry under the sieve and let it stand, discard the supernatant, and keep the wet material for later use.

[0030] Step 2: Take 134g of wet material, which contains 96.8g of zirconia, 1.5g of yttrium oxide, 1.7g of organic matter, 0.5g of metal, and 33.4g of water content. Add 50ml of nitric acid with a concentration of 0.5mol / L, mix and stir, and react at a temperature of 55°C until complete.

[0031] Step 3: Filter the slurry reacted with nitric acid and wash it with pure water.

[0032] Step 4: Add 0.5g of yttrium oxide to adjust the powder composition, mix evenly, burn at 1050°C, and then pulverize into D 50 =0.42μm powder.

[0033] Step 5: The powder obtained in Step 4 is injection-molded into a watch chain green body, which is degreased, sintered and polished to make a zirconium ceramic wear-resistant watch chain. The relevant test data of the pr...

Embodiment 2

[0035] Step 1: Pass the collected yttrium oxide zirconium ceramic grinding waste slurry through a 150-mesh sieve, take the slurry under the sieve and let it stand, discard the supernatant, and keep the wet material for later use.

[0036] Step 2: Take 144g of wet material, which contains 94.4g of zirconia, 3.5g of yttrium oxide, 1.8g of organic matter, 0.5g of metal, and 43g of water content. Add 50ml of hydrochloric acid with a concentration of 1.0mol / L and 5ml of hydrogen peroxide, mix and stir, and react at a temperature of 65°C until complete.

[0037] Step 3: filter the reacted slurry and wash it with pure water.

[0038] Step 4: Add 2g of praseodymium oxide, 1g of cerium oxide, 3g of gadolinium oxide and 10g of alumina and mix evenly to adjust the powder composition, then burn it at 1080°C and pulverize it, and finally granulate it into D 50 =5.1 μm powder.

[0039] Step 5: Injection molding the powder obtained in Step 4 into a grinding medium green body, which is degr...

Embodiment 3-8

[0041] Each step of embodiment 3-8 is identical with embodiment 2. Waste composition, type and amount of acid, type and amount of oxidant,

[0042] The reaction temperature, firing temperature, and related test data of zirconia ceramic products are detailed in Table 1 below.

[0043] Table 1

[0044]

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PUM

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Abstract

The invention relates to a method for preparing zirconium oxide ceramic by recycling zirconium oxide ceramic grinding wastes, and belongs to the technical field of structural ceramics. The method comprises the following steps of: dissolving metal and alloy elements in the wastes by using acid or an oxidant; adding proper matters and adjusting the constitution; firing and removing organic matters; ball-milling into powder; and forming and sintering to prepare the zirconium oxide ceramic. The process method is simple and practical. Through the adoption of the method, the traditional concept that the grinding wastes of the zirconium oxide ceramic products are difficult to recycle is changed.

Description

technical field [0001] The invention relates to recovery of ceramic waste, belonging to the technical field of structural ceramics. Background technique [0002] With the development of my country's zirconia ceramic industry, more and more zirconia ceramic products have been put into the market, but in the production process of zirconia ceramics, the sintered zirconia ceramics must be ground. The amount of grinding accounts for about 5-20wt% of the crude product of zirconia ceramics, and it becomes waste. At present, there is no relevant treatment method, resulting in waste of resources and environmental damage. The general concept is that the grinding waste of the zirconia ceramic products has been fired at high temperature, and its crystals have been transformed into stable cubic or tetragonal phase crystals, and various impurities mixed in during the grinding process, such as: phenolic Grinding wheel organic binders such as resin or epoxy resin account for about 1% of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 龚斌李联和刘革命杨惠明胡志军王文平谢楠彭牛生
Owner GANZHOU KOIN STRUCTURE CERAMICS
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