CN103011282B - A kind of renovation process of rare earth-stabilized zirconia - Google Patents
A kind of renovation process of rare earth-stabilized zirconia Download PDFInfo
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- CN103011282B CN103011282B CN201210581025.6A CN201210581025A CN103011282B CN 103011282 B CN103011282 B CN 103011282B CN 201210581025 A CN201210581025 A CN 201210581025A CN 103011282 B CN103011282 B CN 103011282B
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- rare earth
- stabilized zirconia
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Abstract
The present invention relates to a kind of renovation process of rare earth-stabilized zirconia, the invention provides a kind of renovation process of rare earth-stabilized zirconia, concrete steps are: 1) pulverize, regeneration feed is crushed to granularity and is less than 0.2mm; 2) by the regeneration feed that crushes and acid and catalyst mix even; 3) clear up, the heating material mixed is cleared up, dissolves completely to regeneration feed, the digestion solution of obtained uniform composition; 4) digestion solution coprecipitation method, hydrolysis method, hydrothermal method or glycine method are regenerated as new rare earth-stabilized zirconia.The Direct Regenerations such as the waste material waste residue that produces in the spent catalyst be made up of rare earth-stabilized zirconia, battery electron material, high-abrasive material, production application process can be available material by the present invention, avoid numerous and diverse Rare Earth Separation, purification process, significantly simplify technique.
Description
Technical field
The present invention relates to chemical field, particularly a kind of method rare earth-stabilized zirconia cancelled or lost efficacy being regenerated as available rare earth-stabilized zirconia.
Background technology
Rare earth-stabilized zirconium white relies on the physics of its excellence, chemical property has a wide range of applications in the field such as machinery, Wear-resistant, high-temperature resistant material, battery material, communication material, catalyzer, in production application process, also create waste material.China is a rare earth big country originally; but in recent years due to immoderate exploitation; the rare earth occupancy volume of China is down to less than 30%, and protection rare earth resources is extremely urgent, rare earth-stabilized zirconia materials recycling or the rare earth element extracted wherein is also become the study hotspot of various places scholar.
At present extraction rare earth element wherein is mainly concentrated on to the research of rare earth-stabilized zirconia waste material recycling, method mainly contains: basic metal melts method altogether, method as described in Chinese Patent Application No. 200710035342.7, comprise that soda acid dissolves, is separated, purification, the operation such as concentrated, calcining; Acid leaching extraction method, the method as described in Chinese Patent Application No. 200810073501.7, comprises and prepares the techniques such as powder, acidizing fired, frit leaching, condensing crystal, water-soluble precipitation, calcining.Aforesaid method all has the shortcoming that Extraction of rare eart purification process is complicated, the recycling time is long.Still lacking at present a kind of is directly the method for available rare earth-stabilized zirconia material by materials recycling.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of method rare earth-stabilized zirconia cancelled or lost efficacy being regenerated as available rare earth-stabilized zirconia.
A renovation process for rare earth-stabilized zirconia, concrete steps are:
1) pulverize
Regeneration feed is crushed to granularity and is less than 0.2mm;
2) by the regeneration feed that crushes and acid and catalyst mix even;
3) clear up
The heating material mixed is cleared up, dissolves completely to regeneration feed, the digestion solution of obtained uniform composition;
4) digestion solution coprecipitation method, hydrolysis method, hydrothermal method or glycine method are regenerated as new rare earth-stabilized zirconia.
On the basis of such scheme, described regeneration feed is: the waste residue of the grinding and cutting generation of the waste material produced in the production process of the rare earth-stabilized zirconia battery electron material of inefficacy, the rare earth-stabilized zirconia catalyzer of inefficacy, rare earth-stabilized zirconia or rare earth-stabilized zirconia.
On the basis of such scheme, described acid is sulfuric acid.
On the basis of such scheme, described catalyzer is ammonium sulfate.
On the basis of such scheme, the blending ratio of described regeneration feed and sulfuric acid and ammonium sulfate by weight mark is 1:20-50:10-30.
On the basis of such scheme, described digestion condition is 350 DEG C-650 DEG C, and digestion time is 20min-120min.
On the basis of such scheme, the concentration of described sulfuric acid is greater than 80%.
The invention has the beneficial effects as follows:
1, according to method of the present invention, can be available material by Direct Regenerations such as the waste material waste residues that produces in the spent catalyst be made up of rare earth-stabilized zirconia, battery electron material, Wear-resistant, high-temperature resistant material, production application process, thus avoid numerous and diverse Rare Earth Separation, purification process, significantly simplify technique, shorten the time of rare earth recycling, be conducive to enhancing productivity.
2, according to method of the present invention, the rare earth-stabilized zirconia soluble solids that regeneration obtains and starting material have identical composition, and by suitable processing, the product performance of regeneration can return to the level consistent with starting material.
3, well-known, the key that rare earth-stabilized zirconia middle-weight rare earths reclaims is separated after being dissolved, and therefore according to method of the present invention, material also can be used to the rare earth extracted wherein after clearing up completely.For the material that impurity is more, the method process of Extraction of rare earth can be taked.
4, the ammonium sulphate waste liquor produced in method of the present invention, is reduced to reusable ammonium sulfate catalyst by evaporative crystallization, and unnecessary ammonium sulfate can be used as fertilizer application, avoids the pollution of discharging of waste liquid to environment.
Accompanying drawing explanation
The present invention has following accompanying drawing:
Original (the Sc of Fig. 1
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder XRD test result figure;
Original (the Sc of Fig. 2
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder sintering XRD test result figure;
Fig. 3 regenerates (Sc
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder XRD test result figure;
Fig. 4 regenerates (Sc
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder sintering XRD test result figure;
Fig. 5 original 3mol%-YSZ powder XRD test result figure;
Fig. 6 regenerates 3mol%-YSZ powder XRD test result figure;
Fig. 7 original 8mol% yttria-stabilized zirconia powder test result figure;
Fig. 8 regenerates 8mol% yttria-stabilized zirconia powder test result figure.
Embodiment
Embodiment 1
Solid fuel cell (SOFC) electrolyte (Sc
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89regeneration
Scandium cerium stable cubic zirconium white (Sc
2o
3)
0.1(CeO
2)
0.01(ZrO
2)
0.89be the first-selection application material of high-temperature solid fuel battery electrolyte, after the long-play in battery high-temperature reducing atmosphere, the Lacking oxygen of ionogen itself changes gradually and causes performance degradation, and specific conductivity declines.Due to Sc in inefficacy ionogen
2o
3content, up to about 11%, has high reclaiming and is worth.
Regenerative process is as described below:
The electrolyte sheet of inefficacy is dried and is ground to granularity and is less than 0.2mm; Powder mixes with the ratio of ammonium sulfate according to weight ratio 1:10; Adding concentration is 80% sulfuric acid, and the weight ratio of powder and sulfuric acid is 1:20; Mixed material is put into digestion furnace and clears up 20min with 350 DEG C, obtain uniform scandium sulfate, cerous sulfate, zirconium sulfate, hafnium sulfate solution;
Hydrolysis method reclaims (Sc
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder: stirring reaction 48h at solution being placed in 100 DEG C.Adding 20% ammoniacal liquor after reaction terminates adjusts pH to 10.5 to obtain hydrous oxide or the precipitation of hydroxide of scandium cerium zirconium, is separated by throw out with whizzer.Throw out is dried to content and is greater than 85% in 150 DEG C of baking ovens.900 DEG C of calcining 10h obtain the cubic zirconia of Scium trioxide, ceria stabilized.Calcining material is dropped into grinding machine, and wet-milling to granularity is less than 1 micron, and specific surface area is to 10m
2during about/g, by slurry taking-up spray-dryer mist projection granulating, obtain (the Sc regenerated
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder.The clear liquid of centrifugal generation is by evaporative crystallization reclaim(ed) sulfuric acid ammonium, and a part continues to use as catalyzer, remainingly packs as chemical fertilizer.
(the Sc of regeneration
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder characteristic is substantially identical with original powder characteristic, and properties test result is as shown in table 1, table 2:
Original (the Sc of table 1
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder and regenerated powder Performance comparision
Original (the Sc of table 2
2o
3)
0.1(CeO2)
0.01(ZrO2)
0.89powder and regenerated powder component are tested (XRF)
| ZrO2 (wt%) | Sc2O3 (wt%) | HfO2 (wt%) | CeO2 (wt%) | Impurity (wt%) | |
| Original powder | 85.79% | 10.80% | 1.85% | 1.53% | ＜0.1% |
| Regenerated powder | 85.80% | 10.77% | 1.81% | 1.58% | ＜0.1% |
Embodiment 2
Yttrium stable zirconium oxide materials recycling
Yttrium is the common doped element of zirconia ceramics material, and by means of the physics-chem characteristic that it is excellent, the application in electronic ceramics, structural ceramics, function ceramics etc. is more and more extensive.A kind of 3mol% yttrium stable zirconium oxide (3mol%-YSZ) powder body material, creates part waste material, adopts method of the present invention to regenerate it in sinter molding process.
With ball mill, waste material dry grinding is less than 0.05mm to granularity; Powder mixes according to the ratio of weight ratio 1:30 with catalyzer (ammonium sulfate); Adding concentration is 85% sulfuric acid, and the weight ratio of powder and sulfuric acid is 1:50; Mixed material is put into digestion furnace and clears up 120min with 650 DEG C, obtain uniform yttrium sulfate, hafnium sulfate, zirconium sulfate solution;
Adopt the obtained 3mol%-YSZ powder of hydrothermal method regeneration: in solution, slowly add 20% ammoniacal liquor, adjust pH to more than 10.5, stirring reaction 1h, obtains the hydroxide hydrate mixed slurry of yttrium, zirconium.With whizzer, throw out is separated, and with deionized water, the sulfate concentration in throw out is washed till below 100ppm, obtained presoma.Presoma and soft water mixed according to weight ratio 1:5 and stir evenly, be placed in closed reactor and heat, temperature rise rate is 5 DEG C/min, temperature of reaction control bit 200 DEG C, and pressure remains 1Mpa, by material taking-up after insulation 20h, carries out solid-liquid separation with whizzer.Material is placed in 120 DEG C of baking ovens and dries and be greater than 99.5% to content, obtains the 3mol%-YSZ powder regenerated.The clear liquid of centrifugal generation is by evaporative crystallization reclaim(ed) sulfuric acid ammonium, and a part continues to use as catalyzer, remainingly packs as chemical fertilizer.The 3mol%-YSZ powder characteristic of regeneration compares as shown in table 3, table 4 with original powder characteristic:
The original 3mol%-YSZ powder of table 3 and regenerated powder Performance comparision
| Granularity d50(μm) | Specific surface area (m2/g) | Sintered density (g/ml) | |
| Original powder | 0.356 | 14.13 | 6.09 |
| Regenerated powder | 0.362 | 14.28 | 6.08 |
The original 3mol%-YSZ powder of table 4 and regenerated powder component are tested (XRF)
| Y 2O 3(wt%) | ZrO 2 (wt%) | HfO 2 (wt%) | Impurity (wt%) | |
| Original powder | 5.32 | 92.88 | 1.72 | ＜0.1% |
| Regenerated powder | 5.28 | 92.95 | 1.75 | ＜0.1% |
Embodiment 3
The regeneration of cerium zirconium sosoloid catalyzer
High-performance rare-earth hydrogen-storing material is the key components of cleaning catalyst for tail gases of automobiles, determines performance and the life-span of catalyzer.In particular as purifying vehicle exhaust catalyst aid, CeO
2after middle interpolation transition metal or nonmetal formation sosoloid, not only CeO can be improved
2thermostability, and also improve its oxygen storage capacity, wherein Ce
1-xzr
xo
2(x<0.5) best results of sosoloid system.Adopt method of the present invention to Ce
0.75zr
0.25o
2sosoloid waste regenerates.
With ball mill, waste material dry grinding is less than 0.2mm to granularity; Powder mixes according to the ratio of weight ratio 1:15 with catalyzer (ammonium sulfate); Adding concentration is 90% sulfuric acid, and the weight ratio of powder and sulfuric acid is 1:30; Mixed material is put into digestion furnace and clears up 60min with 470 DEG C, obtain uniform cerous sulfate, sour zirconium solution;
Adopt coprecipitation method regeneration Ce
0.75zr
0.25o
2powder: slowly add 10% ammoniacal liquor and constantly stir in solution, temperature remains on more than 50 DEG C, adjust pH to more than 10.5 time stop add ammoniacal liquor, after stirring 2h, reaction terminates, obtain the hydroxide hydrate of cerium, zirconium with whizzer, with deionized water, the sulfate concentration in centrifugal material is washed till below 500ppm.Material is placed in 120 DEG C of baking ovens to be dried to after content is greater than 80% and to carry out gradient calcining, 400 DEG C of calcining 5h, 600 DEG C of calcining 10h.The material calcined is put into wet wheeling machine grind, during granularity d50 to 0.3 μm, mist projection granulating obtains the Ce regenerated
0.75zr
0.25o
2powder.The clear liquid of centrifugal generation is by evaporative crystallization reclaim(ed) sulfuric acid ammonium, and a part continues to use as catalyzer, remainingly packs as chemical fertilizer.The Ce of regeneration
0.75zr
0.25o
2powder characteristic compares as shown in table 5, table 6 with original powder characteristic:
The original Ce of table 5
0.75zr
0.25o
2powder and regenerated powder Performance comparision
| Granularity d50(μm) | Specific surface area (m2/g) | Specific surface area (m2/g) after 1000 DEG C of sintering 4h | Oxygen storage capacity (ml/g) | |
| Original powder | 0.306 | 52.4 | 22.5 | 8.61 |
| Regenerated powder | 0.313 | 50.2 | 19.6 | 7.89 |
The original Ce of table 6
0.75zr
0.25o
2powder and regenerated powder component are tested (XRF)
| CeO 2(wt%) | ZrO 2 (wt%) | HfO 2 (wt%) | Impurity (wt%) | |
| Original powder | 79.31 | 19.12 | 1.52 | ＜0.1% |
| Regenerated powder | 79.25 | 18.96 | 1.73 | ＜0.1% |
Embodiment 4
8mol% yttria-stabilized zirconia materials recycling.
8mol% yttria-stabilized zirconia to have in higher oxygen ionic conductivity, excellent mechanical property and oxidation and reducing atmosphere the features such as satisfactory stability, and 8mol% yttria-stabilized zirconia film is widely used in making Solid Oxide Fuel Cell (SOFC).Method of the present invention is adopted to regenerate 8mol% yttria-stabilized zirconia waste material.
With ball mill, waste material dry grinding is less than 0.2mm to granularity; Powder mixes according to the ratio of weight ratio 1:20 with catalyzer (ammonium sulfate); Adding concentration is 95% sulfuric acid, and the weight ratio of powder and sulfuric acid is 1:35; Mixed material is put into digestion furnace and clears up 60min with 450 DEG C, obtain uniform yttrium sulfate, zirconium sulfate solution;
Adopt the obtained 8mol% yttria-stabilized zirconia of glycine method regeneration: digestion solution soft water is diluted 50 times, slowly add 20g glycine in every 100g solution and be constantly stirred to glycine and dissolve completely, solution is placed in 120 DEG C of evaporates to dryness in baking oven, add dehydrated alcohol to disperse, at 900 DEG C of calcining 15h, obtain regenerated powder.The 8mol% yttria-stabilized zirconia performance of regeneration compares as shown in table 7, table 8 with original powder characteristic:
The original 8mol% yttria-stabilized zirconia of table 7 and regenerated powder Performance comparision
| Granularity d50(μm) | Specific surface area (m2/g) | Sintered density (g/ml) | |
| Original powder | 0.306 | 13.56 | 6.02 |
| Regenerated powder | 0.378 | 13.02 | 5.99 |
The original 8mol% yttria-stabilized zirconia of table 8 and regenerated powder component are tested (XRF)
| Y 2O 3(wt%) | ZrO 2 (wt%) | HfO 2 (wt%) | Impurity (wt%) | |
| Original powder | 13.76 | 84.69 | 1.49 | ＜0.1% |
| Regenerated powder | 13.57 | 84.78 | 1.58 | ＜0.1% |
The above example only as the preferred method of the present invention, not as limitation of the present invention.Within the spirit illustrated by the present invention and principle, any replacement made, amendment and improvement, be all included in protection scope of the present invention.
Claims (3)
1. a renovation process for rare earth-stabilized zirconia, is characterized in that concrete steps are:
1) pulverize
Regeneration feed is crushed to granularity and is less than 0.2mm;
2) by the regeneration feed that crushes and acid and catalyst mix even;
3) clear up
The heating material mixed is cleared up, dissolves completely to regeneration feed, the digestion solution of obtained uniform composition;
4) digestion solution coprecipitation method, hydrolysis method, hydrothermal method or glycine method are regenerated as new rare earth-stabilized zirconia;
Described acid is sulfuric acid;
Described catalyzer is ammonium sulfate;
The blending ratio of described regeneration feed and sulfuric acid and ammonium sulfate by weight mark is 1:20-50:10-30;
Described digestion condition is 350 DEG C-650 DEG C, and digestion time is 20min-120min.
2. the renovation process of stabilizing zirconia according to claim 1, is characterized in that described regeneration feed is: the waste residue of the grinding and cutting generation of the waste material produced in the production process of the rare earth-stabilized zirconia battery electron material of inefficacy, the rare earth-stabilized zirconia catalyzer of inefficacy, rare earth-stabilized zirconia or rare earth-stabilized zirconia.
3. the renovation process of stabilizing zirconia according to claim 1, is characterized in that the concentration of described sulfuric acid is greater than 80%.
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| CN103553128B (en) * | 2013-10-21 | 2015-09-30 | 湖北工业大学 | Scium trioxide, zirconic recovery method in scandium oxide-stabilizing zirconia sintered compact |
| CN112708768B (en) * | 2021-01-13 | 2023-06-13 | 广东先导稀材股份有限公司 | Pretreatment method of high-chromium waste material of solid oxide fuel cell |
| CN113292336B (en) * | 2021-06-15 | 2022-11-18 | 先导薄膜材料（广东）有限公司 | Method for recycling zirconia ceramic waste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1675131A (en) * | 2002-06-07 | 2005-09-28 | 昭和电工株式会社 | Process for recovering rare earth oxide from waste liquid containing rare earth element, and process for producing rare earth oxide using same |
| CN102471167A (en) * | 2009-10-23 | 2012-05-23 | 株式会社日本触媒 | Process for production of scandia-stabilized zirconia sheet, scandia-stabilized zirconia sheet obtained by the process, and scandia-stabilised zirconia sintered powder |
| CN102583491A (en) * | 2012-02-15 | 2012-07-18 | 淄博市周村磊宝耐火材料有限公司 | Method for preparing high-purity yttrium oxide from gemstone waste and/or ceramic waste |
-
2012
- 2012-12-28 CN CN201210581025.6A patent/CN103011282B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1675131A (en) * | 2002-06-07 | 2005-09-28 | 昭和电工株式会社 | Process for recovering rare earth oxide from waste liquid containing rare earth element, and process for producing rare earth oxide using same |
| CN102471167A (en) * | 2009-10-23 | 2012-05-23 | 株式会社日本触媒 | Process for production of scandia-stabilized zirconia sheet, scandia-stabilized zirconia sheet obtained by the process, and scandia-stabilised zirconia sintered powder |
| CN102583491A (en) * | 2012-02-15 | 2012-07-18 | 淄博市周村磊宝耐火材料有限公司 | Method for preparing high-purity yttrium oxide from gemstone waste and/or ceramic waste |
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